def LST(y, m, d, ut1, EL): ''' calculate the Local sidereal time input: year,month,day(do not have to be integer),ut1,Longitude of the site (all input can be array) output: Local sidereal time in degree examples: LST(2012,10,29,19+53./60 -8 ,116.4) # the Local sidereal time in Beijing(+8) at 2012-10-29 19:53:00 output = 332.86374268340001 # (degree) ''' def J0(year, month, day): '''temp function of LST''' j0 = 367.0*year - np.fix(7.0*(year + np.fix((month + 9)/12.0))/4.0)+ np.fix(275.0*month/9) + day + 1721013.5 return j0 y = np.float64(y) m = np.float64(m) d = np.float64(d) ut1 = np.float64(ut1) EL = np.float64(EL) dd = np.fix(d) time = (d-dd)*24.0 ut = (ut1 + time)%24 j0 = J0(y, m, dd) j = (j0 - 2451545.0)/36525.0 g0 = 100.4606184 + (36000.77004*j) + (0.000387933*j**2)- 2.583e-8*j**3 g0 = g0%360 gst = g0 + (360.98564724*ut/24.0) lst = gst + EL lst = lst - 360.0*np.fix(lst/360.0) return lst
def dec2Dec2(Dec): ''' change degree to dec2 dec2 is the degree: np.array([ XXdegree, XXminute, XXsecond]) if dec2 is negative, it should be like np.array([-XXdegree, -XXminute, -XXsecond]) examples: for single degree input: np.array([degree]) dec2Dec2(np.array([45.51])) output = array([[ 45., 30., 36.]]) it is the dec2 representing 45 degree 30 minute 36 second for array degrees input: np.array([degree1, degree2, degree3....]) dec2Dec2(np.array([-256.32, -135.5, 10.3234, 256.3333333333])) output = array([[-256. , -19. , -12. ], [-135. , -30. , 0. ], [ 10. , 19. , 24.24 ], [ 256. , 19. , 59.99999988]]) they are 4 dec2s ''' Dec = np.float64(Dec) degree = np.fix(Dec) #print 'degree=',degree _point = (Dec-degree)*60.0 minute = np.fix(_point) #print 'minute=',minute arc = (_point-minute)*60.0 #print 'arc=',arc return np.array([degree,minute,arc]).T
def get_cofe_target(ut,lat,lon,target):
#function to use ephem to find az and el of specified target for COFE
#parameters: UT, LAt Lon Target
cofe=ephem.Observer()
cofe.elevation=0.0
year=2013
month=10
day=04
az=[]
el=[]
for u,la,lo in zip(ut,lat,lon):
if (u >24):
u=u-24
day=05
hour=int(np.fix(u))
minute=(u-hour)*60
iminute=int(np.fix(minute))
second=int(np.fix((minute-iminute)*60))
datestring=str(year)+'/'+str(month)+'/'+str(day)+' '+str(hour)+':'+str(iminute)+':'+str(second)
datestring
cofe.date=datestring
cofe.lon=str(rtd*lo)
cofe.lat=str(rtd*la)
pos=ephem.__getattribute__(target)(cofe)
az.append(pos.az)
el.append(pos.alt)
return np.array(az),np.array(el)
def nlfer(signal, pitch, parameters):
#---------------------------------------------------------------
# Set parameters.
#---------------------------------------------------------------
N_f0_min = np.around((parameters['f0_min']*2/float(signal.new_fs))*pitch.nfft)
N_f0_max = np.around((parameters['f0_max']/float(signal.new_fs))*pitch.nfft)
window = hanning(pitch.frame_size+2)[1:-1]
data = np.zeros((signal.size)) #Needs other array, otherwise stride and
data[:] = signal.filtered #windowing will modify signal.filtered
#---------------------------------------------------------------
# Main routine.
#---------------------------------------------------------------
samples = np.arange(int(np.fix(float(pitch.frame_size)/2)),
signal.size-int(np.fix(float(pitch.frame_size)/2)),
pitch.frame_jump)
data_matrix = np.empty((len(samples), pitch.frame_size))
data_matrix[:, :] = stride_matrix(data, len(samples),
pitch.frame_size, pitch.frame_jump)
data_matrix *= window
specData = np.fft.rfft(data_matrix, pitch.nfft)
frame_energy = np.abs(specData[:, N_f0_min-1:N_f0_max]).sum(axis=1)
pitch.set_energy(frame_energy, parameters['nlfer_thresh1'])
pitch.set_frames_pos(samples)
def interval2semitone(interval, accidentals):
# Need it to be int
import numpy as np
interval = int(interval)
# semitone equivalents for intervals
# interval 1,2,3,4,5,6,7
semitonetranslation = [0,2,4,5,7,9,11]
semitone = 0
success = True
if (interval > 0) and (interval < 50):
# semitone value is the number of semitones equivalent to the interval
# added to the number of accidentals (sharps are positive, flats are
# negative) and the number of octaves above the reference note to
# account for extensions
des_index = int(np.mod(interval,8) + np.fix(interval/8))-1
semitone = int(semitonetranslation[des_index] + accidentals + 12*np.fix(interval/8))
else:
success = False
print 'Error in interval2semitone: out of range interval'
return semitone, success
def detect_face_12net(cls_prob,roi,out_side,scale,width,height,threshold):
in_side = 2*out_side+11
stride = 0
if out_side != 1:
stride = float(in_side-12)/(out_side-1)
(x,y) = np.where(cls_prob>=threshold)
boundingbox = np.array([x,y]).T
bb1 = np.fix((stride * (boundingbox) + 0 ) * scale)
bb2 = np.fix((stride * (boundingbox) + 11) * scale)
boundingbox = np.concatenate((bb1,bb2),axis = 1)
dx1 = roi[0][x,y]
dx2 = roi[1][x,y]
dx3 = roi[2][x,y]
dx4 = roi[3][x,y]
score = np.array([cls_prob[x,y]]).T
offset = np.array([dx1,dx2,dx3,dx4]).T
boundingbox = boundingbox + offset*12.0*scale
rectangles = np.concatenate((boundingbox,score),axis=1)
rectangles = rect2square(rectangles)
pick = []
for i in range(len(rectangles)):
x1 = int(max(0 ,rectangles[i][0]))
y1 = int(max(0 ,rectangles[i][1]))
x2 = int(min(width ,rectangles[i][2]))
y2 = int(min(height,rectangles[i][3]))
sc = rectangles[i][4]
if x2>x1 and y2>y1:
pick.append([x1,y1,x2,y2,sc])
return NMS(pick,0.5,'iou')
def epoch_plot(t, y, period, name='none'):
phase = (t/period)*1.0 - np.fix(t/period)
sortidxs = np.argsort(phase)
sorted_phase = phase[sortidxs]
sorted_y = y[sortidxs]
sorted_dates = t[sortidxs]
pp = np.concatenate([sorted_phase, sorted_phase+1.0], 1)
yy = np.concatenate([sorted_y, sorted_y], 1)
epochs = np.fix(sorted_dates/period)
epoch_list = set(epochs)
mi = min(y)-0.15
ma2 = heapq.nlargest(2, y)[1]
plt.clf()
x = 0
for i in epoch_list:
period_date_idxs = np.asarray(np.where(epochs == i))
period_mags = sorted_y[period_date_idxs]
period_dates = sorted_dates[period_date_idxs]
period_phases = sorted_phase[period_date_idxs]
pp = np.concatenate([period_phases, period_phases + 1.0], 1)
yy = np.concatenate([period_mags, period_mags], 1)
plt.scatter(pp, yy, color=cm.jet(1.*x/len(epoch_list)), alpha=0.7, edgecolors='none')
x +=1
print ma2, mi
plt.ylim(ma2, mi)
#plt.gca().invert_yaxis()
plt.text(-0.4, mi+0.1, "period = {} days".format(period), fontsize=14)
plt.xlabel("phase")
plt.ylabel("V-band magnitude")
if name !='none':
#plt.title("{}".format(name))
plt.savefig("../output/{}_epoch.png".format(name))
plt.show()
def intermediate_profile(x, xhinge, delta):
"""Generate an intermediate profile of some quantity.
Ferron et. al. 1998
Returns the 'top down' and 'bottom up' profiles as well as the average
of the two.
"""
xf = np.flipud(x)
xtd = np.zeros_like(x)
xbu = np.zeros_like(x)
ntd = np.fix(x[0]/delta - xhinge/delta)
nbu = np.fix(xf[0]/delta - xhinge/delta)
xtd[0] = xhinge + ntd*delta
xbu[0] = xhinge + nbu*delta
for i in xrange(len(x) - 1):
ntd = np.fix(x[i+1]/delta - xtd[i]/delta)
nbu = np.fix(xf[i+1]/delta - xbu[i]/delta)
xtd[i+1] = xtd[i] + ntd*delta
xbu[i+1] = xbu[i] + nbu*delta
xbu = np.flipud(xbu)
xav = (xtd + xbu)/2.
return xtd, xbu, xav
def plot_imfs(self, time, tstart=None, tend=None, tunit='s', savefig_name=''):
time = time - time[0]
dt = time[1] - time[0]
if tstart != None:
tstart = int(np.fix(tstart / dt))
if tend != None:
tend = int(np.fix(tend / dt))
num_subplot = self.num_imf + 1
fig = plt.figure()
ax = fig.add_subplot(num_subplot, 1, 1)
ax.plot(time[tstart:tend], self.input_signal[tstart:tend])
ax.set_ylabel('Data')
ax.get_yaxis().set_label_coords(-0.1,0.5)
for i in range(self.num_imf - 1):
ax = fig.add_subplot(num_subplot, 1, i + 2)
ax.plot(time[tstart:tend], self.imfs[:,i][tstart:tend])
ax.set_ylabel(r'$C_{' + str(i + 1) + '}$')
ax.get_yaxis().set_label_coords(-0.1,0.5)
ax = fig.add_subplot(num_subplot, 1, num_subplot)
ax.plot(time[tstart:tend], self.imfs[:,-1][tstart:tend])
ax.get_yaxis().set_label_coords(-0.1,0.5)
ax.set_ylabel('Trend')
ax.set_xlabel('Time (' + tunit + ')')
if savefig_name == '':
plt.show()
else:
plt.savefig(savefig_name, format='eps', dpi=1000)
def generateBoundingBox(imap, reg, scale, t):
# use heatmap to generate bounding boxes
stride = 2
cellsize = 12
imap = np.transpose(imap)
dx1 = np.transpose(reg[:, :, 0])
dy1 = np.transpose(reg[:, :, 1])
dx2 = np.transpose(reg[:, :, 2])
dy2 = np.transpose(reg[:, :, 3])
y, x = np.where(imap >= t)
if y.shape[0] == 1:
dx1 = np.flipud(dx1)
dy1 = np.flipud(dy1)
dx2 = np.flipud(dx2)
dy2 = np.flipud(dy2)
score = imap[(y, x)]
reg = np.transpose(np.vstack([dx1[(y, x)], dy1[(y, x)], dx2[(y, x)], dy2[(y, x)]]))
if reg.size == 0:
reg = np.empty((0, 3))
bb = np.transpose(np.vstack([y, x]))
q1 = np.fix((stride * bb + 1) / scale)
q2 = np.fix((stride * bb + cellsize - 1 + 1) / scale)
boundingbox = np.hstack([q1, q2, np.expand_dims(score, 1), reg])
return boundingbox, reg
def generate_bounding_box(imap, reg, scale, threshold):
"""Use heatmap to generate bounding boxes"""
# pylint: disable=too-many-locals
stride = 2
cellsize = 12
imap = np.transpose(imap)
d_x1 = np.transpose(reg[:, :, 0])
d_y1 = np.transpose(reg[:, :, 1])
d_x2 = np.transpose(reg[:, :, 2])
d_y2 = np.transpose(reg[:, :, 3])
dim_y, dim_x = np.where(imap >= threshold)
if dim_y.shape[0] == 1:
d_x1 = np.flipud(d_x1)
d_y1 = np.flipud(d_y1)
d_x2 = np.flipud(d_x2)
d_y2 = np.flipud(d_y2)
score = imap[(dim_y, dim_x)]
reg = np.transpose(np.vstack([d_x1[(dim_y, dim_x)], d_y1[(dim_y, dim_x)],
d_x2[(dim_y, dim_x)], d_y2[(dim_y, dim_x)]]))
if reg.size == 0:
reg = np.empty((0, 3))
bbox = np.transpose(np.vstack([dim_y, dim_x]))
q_1 = np.fix((stride * bbox + 1) / scale)
q_2 = np.fix((stride * bbox + cellsize - 1 + 1) / scale)
boundingbox = np.hstack([q_1, q_2, np.expand_dims(score, 1), reg])
return boundingbox, reg
def idftreal(A, N, M):
'''
Calculates multiple 1D inverse DFT from complex to real
Input:
A - input complex vectors in column form (samples from zero to Nyquist)
N - number of output samples (= number of implied complex input samples)
M - number of input vectors
Based on idftreal.m by R.G. Pratt
'''
a = np.zeros((N, M))
n = np.arange(N).reshape((N,1))
# Set maximum non-Nyquist frequency index (works for even or odd N)
imax = np.int(np.fix((N+1)//2)-1)
k1 = np.arange(np.fix(N//2)+1) # Freq indices from zero to Nyquist
k2 = np.arange(1, imax+1) # Freq indices except zero and Nyquist
nk1 = n * k1.T
nk2 = n * k2.T
w = np.exp(-2j*np.pi / N)
W = w**nk1
W2 = w**nk2
W[:,1:imax+1] += W2 # Add two matrices properly shifted
a = np.dot(W, A[:np.fix(N//2)+1,:M]).real # (leads to doubling for non-Nyquist)
return a
def _simulate_image(self):
"""
Generates the fake output.
"""
with self._acquisition_init_lock:
pos = self.align.position.value
logging.debug("Simulating image shift by %s", pos)
ac, bc = pos.get("a"), pos.get("b")
ang = math.radians(135)
# AB->XY
xc = -(ac * math.sin(ang) + bc * math.cos(ang))
yc = -(ac * math.cos(ang) - bc * math.sin(ang))
pixelSize = self.fake_img.metadata[model.MD_PIXEL_SIZE]
self.fake_img.metadata[model.MD_ACQ_DATE] = time.time()
x_pxs = xc / pixelSize[0]
y_pxs = yc / pixelSize[1]
# Image shifted based on LensAligner position
z = 1j # imaginary unit
self.deltar = x_pxs
self.deltac = y_pxs
nr, nc = self.fake_img.shape
array_nr = numpy.arange(-numpy.fix(nr / 2), numpy.ceil(nr / 2))
array_nc = numpy.arange(-numpy.fix(nc / 2), numpy.ceil(nc / 2))
Nr = fft.ifftshift(array_nr)
Nc = fft.ifftshift(array_nc)
[Nc, Nr] = numpy.meshgrid(Nc, Nr)
sim_img = fft.ifft2(fft.fft2(self.fake_img) * numpy.power(math.e,
z * 2 * math.pi * (self.deltar * Nr / nr + self.deltac * Nc / nc)))
output = model.DataArray(abs(sim_img), self.fake_img.metadata)
return output
def jd2gps(jd):
"""
% JD2GPS Converts Julian date to GPS week number (since
% 1980.01.06) and seconds of week.
% Usage: [gpsweek,sow,rollover]=jd2gps(jd)
% Input: jd - Julian date
% Output: gpsweek - GPS week number
% sow - seconds of week since 0 hr, Sun.
% rollover - number of GPS week rollovers (modulus 1024)
% Copyright (c) 2011, Michael R. Craymer
% All rights reserved.
% Email: [email protected]
"""
jdgps = cal2jd(1980,1,6); # beginning of GPS week numbering
nweek = int(np.fix((jd-jdgps)/7.))
sow = (jd - (jdgps+nweek*7)) * 3600*24
rollover = np.fix(nweek/1024) # rollover every 1024 weeks
gpsweek = int(nweek)
# rollover is being returned as an array?
# should just be an int
return gpsweek,sow,rollover
def cos_pattern(AO_resolution, freq):
# Experiment spec: sinewave on angles of stepper motor:
# 60 degree amplitude (max), 15 Hz (max)
# from Karin and Holger 12-apr-2011 15:00:00
step = 360.0/5000 #...step(/microstep) angle (degree)
amp = 60 /2 #...sine wave amplitude (peak to peak degree)
# freq = 1 #...sine wave frequency (Hz)
Y = numpy.arange(0,amp,step)
X = (1/(2*numpy.pi*freq))*numpy.arcsin(Y/amp)
# AO_resolution = 2.5e-6 # (us) resolution: 400k Hz maximum, the period of which is 2.5 us
# AO_resolution = 5e-6 # (us) resolution: 200k Hz maximum, the period of which is 5 us
# AO_resolution = 1e-4 # (us) resolution: 10k Hz maximum, the period of which is 100 us
Xs = numpy.fix(X / AO_resolution )
SM_sig = numpy.zeros(numpy.fix(Xs[numpy.size(Xs)-1])+1)
for i in range(numpy.size(Xs)): SM_sig[Xs[i]]=1
rev_SM_sig = numpy.zeros(numpy.fix(Xs[numpy.size(Xs)-1])+1)
for i in range(numpy.size(SM_sig)): rev_SM_sig[i]=SM_sig[numpy.size(SM_sig)-1-i]
# duration = 2 * X[numpy.size(X)-1] # (second) duration of the signal train
wavelet = 5 * numpy.append( rev_SM_sig , SM_sig)
wavelet = numpy.append(wavelet, wavelet)
wavelet = numpy.append(wavelet, numpy.array([0]))
return wavelet
def symmetrized_dot_cloud(waveform, angle=60, top=50, lag=1):
"""
same as symmetrized dots but returns a 2d point cloud instead of a boolean image. note the
return value is a tuple (x, y) of int ndarrays, which is equivalent to (cols, rows).
"""
# normalize the waveform to 0-top
waveform = normalize(waveform, top)
# roll the waveform by lag to get the angles we'll use
roll_waveform = np.roll(waveform, lag)
# now compute the angles
first_angle = np.concatenate(
[base_angle + roll_waveform for base_angle in np.arange(0, 360, angle)])
second_angle = np.concatenate(
[base_angle - roll_waveform for base_angle in np.arange(0, 360, angle)])
all_angles = np.deg2rad(np.concatenate([first_angle, second_angle]))
# tile the original waveform until it matches the length of the angles
num_repeats = int(all_angles.size / waveform.size)
waveform = np.tile(waveform, num_repeats)
# now make the point cloud
x_cols = waveform * np.cos(all_angles) + top
y_rows = waveform * np.sin(all_angles) + top
return (np.fix(x_cols).astype(np.int), np.fix(y_rows).astype(np.int))
def stim(w=360):
global SM_step
SM_step = 360.0/5000.0 #...step(/microstep) angle (degree)
amp = 360.0 /2 #...sine wave amplitude (peak to peak degree)
freq = 1 #...sine wave frequency (Hz)
Y = numpy.arange(0,amp,SM_step)
X = (1/(2*numpy.pi*freq))*numpy.arcsin(Y/amp)
#w = 180.0 #... deg/sec
#tLmt = (360.0/w)/4/(SM_step)
#tLmt = 1.0/5000
global tLmt
tLmt = SM_step / w #... sec/step
dX = numpy.zeros(numpy.size(X))
dX[0] = X[0]
for i in range(1, numpy.size(X)-1): dX[i] = X[i] - X[i-1]
for i in range(1,numpy.size(X)):
if dX[i] < tLmt: dX[i] = tLmt
XX = numpy.zeros(numpy.size(X))
for i in range(1,numpy.size(XX)): XX[i] = XX[i-1] + dX[i]
# pylab.plot(X,Y);pylab.show();
AO_resolution = 5e-6 # (us) resolution: 200k Hz maximum, the period of which is 5 us
Xs = numpy.fix(XX / AO_resolution )
SM_sig = numpy.zeros(numpy.fix(Xs[numpy.size(Xs)-1])+1) #... numpy.size(Xs)-1
for i in range(numpy.size(Xs)): SM_sig[Xs[i]]=1
rev_SM_sig = numpy.zeros(numpy.fix(Xs[numpy.size(Xs)-1])+1)
for i in range(numpy.size(SM_sig)): rev_SM_sig[i]=SM_sig[numpy.size(SM_sig)-1-i]
# duration = 2 * X[numpy.size(X)-1] # (second) duration of the signal train
wavelet = 5 * numpy.append( rev_SM_sig,SM_sig )
wavelet = numpy.append(wavelet, wavelet)
wavelet = numpy.append(wavelet, numpy.array([0]))
SM_dir = numpy.append(5*numpy.ones(numpy.size(rev_SM_sig)+numpy.size(SM_sig)),numpy.zeros(numpy.size(rev_SM_sig)+numpy.size(SM_sig)))
SM_dir = numpy.append(SM_dir, numpy.array([0]))
# for easier data processing
sig_head = 5*numpy.ones(20)
sig_tail = numpy.append(numpy.zeros(20),5*numpy.ones(20))
sig_tail = numpy.append(sig_tail,numpy.zeros(1))
SM_pulse = numpy.append(sig_head,wavelet)
SM_pulse = numpy.append(SM_pulse,sig_tail)
SM_dir = numpy.append(sig_head,SM_dir)
SM_dir = numpy.append(SM_dir,sig_tail)
stim = numpy.append(SM_pulse, SM_dir)
#wavelet = 5 * numpy.ones(40000)
return stim
def coherr(C,J1,J2,p=0.05,Nsp1=None,Nsp2=None):
"""
Function to compute lower and upper confidence intervals on
coherency (absolute value of coherence).
C: coherence (real or complex)
J1,J2: tapered fourier transforms
p: the target P value (default 0.05)
Nsp1: number of spikes in J1, used for finite size correction.
Nsp2: number of spikes in J2, used for finite size correction.
Default is None, for no correction
Outputs:
CI: confidence interval for C, N x 2 array, (lower, upper)
phi_std: stanard deviation of phi, N array
"""
from numpy import iscomplexobj, absolute, fix, zeros, setdiff1d, real, sqrt,\
arctanh, tanh
from scipy.stats import t
J1 = _combine_trials(J1)
J2 = _combine_trials(J2)
N,K = J1.shape
assert J1.shape==J2.shape, "J1 and J2 must have the same dimensions."
assert N == C.size, "S and J lengths don't match"
if iscomplexobj(C): C = absolute(C)
pp = 1 - p/2
dof = 2*K
dof1 = dof if Nsp1 is None else fix(2.*Nsp1*dof/(2.*Nsp1+dof))
dof2 = dof if Nsp2 is None else fix(2.*Nsp2*dof/(2.*Nsp2+dof))
dof = min(dof1,dof2)
Cerr = zeros((N,2))
tcrit = t(dof-1).ppf(pp).tolist()
atanhCxyk = zeros((N,K))
phasefactorxyk = zeros((N,K),dtype='complex128')
for k in xrange(K):
indxk = setdiff1d(range(K),[k])
J1k = J1[:,indxk]
J2k = J2[:,indxk]
eJ1k = real(J1k * J1k.conj()).sum(1)
eJ2k = real(J2k * J2k.conj()).sum(1)
eJ12k = (J1k.conj() * J2k).sum(1)
Cxyk = eJ12k/sqrt(eJ1k*eJ2k)
absCxyk = absolute(Cxyk)
atanhCxyk[:,k] = sqrt(2*K-2)*arctanh(absCxyk)
phasefactorxyk[:,k] = Cxyk / absCxyk
atanhC = sqrt(2*K-2)*arctanh(C);
sigma12 = sqrt(K-1)* atanhCxyk.std(1)
Cu = atanhC + tcrit * sigma12
Cl = atanhC - tcrit * sigma12
Cerr[:,0] = tanh(Cl / sqrt(2*K-2))
Cerr[:,1] = tanh(Cu / sqrt(2*K-2))
phistd = (2*K-2) * (1 - absolute(phasefactorxyk.mean(1)))
return Cerr, phistd
def gaussian_bandpass_analytic(s, sample_rate, frequencies, bandwidths, round=True):
""" Compute the analytic signal in a set of bandpass channels
:param s: the raw signal
:param sample_rate: the signal's sample_rate
:param frequencies: a list of center frequencies for gaussian filters
:param bandwidths: a list of bandwidths for gaussian filters
:param round: pad with zeros to next multiple of 2. Since we are doing so many iffts, this can speed things up a lot.
:return analytic_signal: an array of dimension len(frequencies) * len(s)
"""
if isinstance(bandwidths, (int, float)):
bandwidths = [bandwidths]
if len(bandwidths) != len(frequencies):
if len(bandwidths) == 1:
bandwidths = list(bandwidths) * len(frequencies)
else:
raise ValueError("bandwidths should be the same length as frequencies")
# Enforce even window_length to have a symmetric window
window_length = np.fix(np.fix(6 * sample_rate / (min(bandwidths) * 2.0 * np.pi)) / 2) * 2;
if round:
pow2_length = 2 ** np.ceil(np.log2(len(s) + window_length))
window_length = (pow2_length - len(s)) / 2
# Pad the input with zeros
padded = np.pad(s,
(int(window_length / 2), int(np.ceil(window_length / 2))),
'constant')
input_length = len(padded)
input_start = int(window_length / 2)
# Assign space for output
analytic_signal = np.zeros((len(frequencies), len(s)), dtype=np.complex128)
# Digital filtering
spectrum = fft(padded)
fft_freqs = fftfreq(input_length, d=(1.0 / sample_rate))
nonzero_inds = fft_freqs >= 0
positive_inds = fft_freqs > 0
frequency_filter = np.zeros_like(spectrum)
for ii, (freq, bw) in enumerate(zip(frequencies, bandwidths)):
# Create the digital filter for this band
frequency_filter[nonzero_inds] = np.exp(-0.5 * (fft_freqs[nonzero_inds] - freq) ** 2 / float(bw) ** 2)
# Compute the filtered spectrum
filtered_spectrum = frequency_filter * spectrum
# Double the values of the positive frequencies for the analytic signal
filtered_spectrum[positive_inds] *= 2
# Compute the analytic signal
bfinput = ifft(filtered_spectrum)
# Remove the padding
analytic_signal[ii] = bfinput[input_start: input_start + len(s)]
return analytic_signal
def note2degree(note, root):
import numpy as np
success = True
degree = ''
# interval translations on the line of fifths
fifthtranslations = [1,5,2,6,3,7,4];
# get note and root natural position and accidentals on line of fifths
noteposition, success1 = note2fifthposition(note)
rootposition, success2 = note2fifthposition(root)
if success1 and success2:
# take the difference between the two note positions for relative positions
# of notes with respect to one and other
fifthsdifference = noteposition - rootposition + 1
# natural difference on line of fifths
fifthsinterval = np.mod((fifthsdifference-1),7);
i = 0;
# find number of accidentals apart on line of fifths
if fifthsdifference < 0: # if above 0 then either natural or sharp
#if final position is negative then calculate number of flats
# remembering to include the extra first flat (-1)
accidentals = np.fix((fifthsdifference)/7) -1
else:
# note is a natural or has a number of sharps
accidentals = np.fix(fifthsdifference/7);
# put the required number of sharps or flats into the output string
if accidentals > 0:
for i in range(accidentals):
degree = degree + '#'
elif accidentals <= 0:
abs_acc = int(np.abs(accidentals))
for i in range(abs_acc):
degree = degree + 'b'
# find interval value from translation array
interval = fifthtranslations[int(fifthsinterval)]
degree = degree + str(interval)
else:
success = False
return degree,success
def Find_wav_kurt(x,h,g,h1,h2,h3,nlevel,Sc,Fr,opt,Fs=1):
# [c,Bw,fc,i] = Find_wav_kurt(x,h,g,h1,h2,h3,nlevel,Sc,Fr,opt2)
# Sc = -log2(Bw)-1 with Bw the bandwidth of the filter
# Fr is in [0 .5]
#
# -------------------
# J. Antoni : 12/2004
# -------------------
level = np.fix((Sc))+ ((Sc%1) >= 0.5) * (np.log2(3)-1)
Bw = 2**(-level-1)
freq_w = np.arange(0,2**(level-1)) / 2**(level+1) + Bw/2.
J = np.argmin(np.abs(freq_w-Fr))
fc = freq_w[J]
i = int(np.round(fc/Bw-1./2))
if level % 1 == 0:
acoeff = binary(i, level)
bcoeff = np.array([])
temp_level = level
else:
i2 = np.fix((i/3.))
temp_level = np.fix((level))-1
acoeff = binary(i2,temp_level)
bcoeff = i-i2*3
acoeff = acoeff[::-1]
c = K_wpQ_filt(x,h,g,h1,h2,h3,acoeff,bcoeff,temp_level)
print c
kx = kurt(c,opt)
print "kx", kx
sig = np.median(np.abs(c))/np.sqrt(np.pi/2.)
print sig
threshold = sig*raylinv(np.array([.999,]),np.array([1,]))
print "threshold", threshold
spec = int(raw_input(' Do you want to see the envelope spectrum (yes = 1 ; no = 0): '))
fig = plt.figure()
t = np.arange(len(x))/Fs
tc = np.linspace(t[0],t[-1],len(c))
plt.subplot(2+spec,1,1)
plt.plot(t,x,'k',label='Original Signal')
plt.subplot(2+spec,1,2)
plt.plot(tc,np.abs(c),'k')
plt.plot(tc,threshold*np.ones(len(c)),'--r')
#~ plt.title('Envlp of the filtr sgl, Bw=Fs/2^{'+(level+1)+'}, fc='+(Fs*fc)+'Hz, Kurt='+(np.round(np.abs(10*kx))/10)+', \alpha=.1%']
plt.xlabel('time [s]')
if spec == 1:
print nextpow2(len(c))
nfft = int(nextpow2(len(c)))
env = np.abs(c)**2
S = np.abs(np.fft.fft(env.ravel()-np.mean(env)*np.hanning(len(env))/len(env),nfft))
f = np.linspace(0, 0.5*Fs/2**level,nfft/2)
plt.subplot(313)
plt.plot(f,S[:nfft/2],'k')
plt.title('Fourier transform magnitude of the squared envelope')
plt.xlabel('frequency [Hz]')
plt.show()
return [c,Bw,fc]
def jd2date(jd):
"""This function finds the Year, month, day, hour, minute and second
given the Julian date.
Algorithm : Set up starting values
Find the elapsed days through the year in a loop
Call routine to find each individual value
Author : Capt Dave Vallado USAFA/DFAS 719-472-4109 26 Feb 1990
In Ada : Dr Ron Lisowski USAFA/DFAS 719-472-4110 17 May 1995
In Matlab : LtCol Thomas Yoder USAFA/DFAS 719-333-4110 Spring 2000
In Python : Shankar Kulumani GWU 630-336-6257 2017 06 15
Inputs :
JD - Julian Date days from 4713 B.C.
OutPuts :
Yr - Year 1900 .. 2100
Mon - Month 1 .. 12
D - Day 1 .. 28,29,30,31
H - Hour 0 .. 23
M - Minute 0 .. 59
S - Second 0.0 .. 59.999
Locals :
days - Day of year plus fraction of a day days
Tu - Julian Centuries from 1 Jan 1900
Temp - Temporary Long_Float value
LeapYrs - Number of Leap years from 1900
Constants :
None.
Coupling :
DayofYr2MDHMS - Finds Month, day, hour, minute and second given Days
and Yr
References :
1988 Almanac for Computers pg. B2
Escobal pg. 17-19
Kaplan pg. 329-330
"""
temp = jd - 2415019.5
tu = temp / 365.25
yr = 1900 + np.fix(tu)
leapyrs = np.fix((yr - 1900 - 1) * 0.25)
days = temp - ((yr - 1900) * 365.0 + leapyrs)
# check for beginning of year
if days < 1.0:
yr = yr - 1
leapyrs = np.fix((yr - 1900 - 1) * 0.25)
days = temp - ((yr - 1900) * 365.0 + leapyrs)
mon, day, h, m, s = dayofyr2mdhms(yr, days)
return (yr, mon, day, h, m, s)
def sccs_bit_sync(y,Ns): """ rx_symb_d,clk,track = sccs_bit_sync(y,Ns) ////////////////////////////////////////////////////// Symbol synchronization algorithm using SCCS ////////////////////////////////////////////////////// y = baseband NRZ data waveform Ns = nominal number of samples per symbol Reworked from ECE 5675 Project Translated from m-code version Mark Wickert April 2014 """ # decimated symbol sequence for SEP rx_symb_d = np.zeros(int(np.fix(len(y)/Ns))) track = np.zeros(int(np.fix(len(y)/Ns))) bit_count = -1 y_abs = np.zeros(len(y)) clk = np.zeros(len(y)) k = Ns+1 #initial 1-of-Ns symbol synch clock phase # Sample-by-sample processing required for i in xrange(len(y)): #y_abs(i) = abs(round(real(y(i)))) if i >= Ns: # do not process first Ns samples # Collect timing decision unit (TDU) samples y_abs[i] = np.abs(np.sum(y[i-Ns+1:i+1])) # Update sampling instant and take a sample # For causality reason the early sample is 'i', # the on-time or prompt sample is 'i-1', and # the late sample is 'i-2'. if (k == 0): # Load the samples into the 3x1 TDU register w_hat. # w_hat[1] = late, w_hat[2] = on-time; w_hat[3] = early. w_hat = y_abs[i-2:i+1] bit_count += 1 if w_hat[1] != 0: if w_hat[0] < w_hat[2]: k = Ns-1 clk[i-2] = 1 rx_symb_d[bit_count] = y[i-2-int(np.round(Ns/2))-1] elif w_hat[0] > w_hat[2]: k = Ns+1 clk[i] = 1 rx_symb_d[bit_count] = y[i-int(np.round(Ns/2))-1] else: k = Ns clk[i-1] = 1 rx_symb_d[bit_count] = y[i-1-int(round(Ns/2))-1] else: k = Ns clk[i-1] = 1 rx_symb_d[bit_count] = y[i-1-int(round(Ns/2))] track[bit_count] = np.mod(i,Ns) k -= 1 # Trim the final output to bit_count rx_symb_d = rx_symb_d[:bit_count] return rx_symb_d, clk, track
def __init__(self, x, wind = 20, over = 50):
self.vect = x
self.wind = wind
self.over = over
self.nover = np.fix(self.wind*self.over/100)
self.nadv = self.wind - self.nover
self.nrecs = np.fix((len(x) - self.nover)/self.nadv)
self.nfft = nextpow2(self.wind)
self.X,self.Y,self.Z = PreP.FIR2(self.vect)
def decrease(val, dN): # auxiliary function to remove unnecesary Fourier freq.
dN=np.array(dN)
N=np.array(val.shape[-dN.size:])
ibeg = np.array(np.fix((N-dN+(dN % 2))/2), dtype=np.int)
iend = np.array(np.fix((N+dN+(dN % 2))/2), dtype=np.int)
if dN.size==2:
return val[:,:,ibeg[0]:iend[0],ibeg[1]:iend[1]]
elif dN.size==3:
return val[:,:,ibeg[0]:iend[0],ibeg[1]:iend[1],ibeg[2]:iend[2]]
def Find_wav_kurt(x, h, g, h1, h2, h3, nlevel, Sc, Fr, Fs=1, verbose=False):
"""
TODO flesh out this doc-string
J. Antoni : 12/2004
Translation to Python: T. Lecocq 02/2012
:param x: signal
:param h: lowpass filter
:param g: highpass filter
:param h1: filter parameter returned by get_h_parameters
:param h2: filter parameter returned by get_h_parameters
:param h3: filter parameter returned by get_h_parameters
:param nlevel: number of decomposition levels
:param Sc: Sc = -log2(Bw)-1 with Bw the bandwidth of the filter
:param Fr: in the range [0, 0.5]
:param Fs: Sampling frequency of signal x
:param verbose: If ``True`` outputs debugging information
:type x: numpy array
:type h: numpy array
:type g: numpy array
:type h1: numpy array
:type h2: numpy array
:type h3: numpy array
:type nlevel: integer
:type Fr: float
:type: Fs: integer
:returns: c, s, threshold, Bw, fc
"""
level = np.fix((Sc))+((Sc % 1) >= 0.5)*(np.log2(3)-1)
Bw = 2**(-level-1)
freq_w = np.arange(0, 2**level) / 2**(level+1) + Bw/2.
J = np.argmin(np.abs(freq_w-Fr))
fc = freq_w[J]
i = int(np.round(fc/Bw-1./2))
if level % 1 == 0:
acoeff = binary(i, int(level))
bcoeff = []
temp_level = level
else:
i2 = int(np.fix((i/3.)))
temp_level = np.fix((level))-1
acoeff = binary(i2, int(temp_level))
bcoeff = i-i2*3
acoeff = acoeff[::-1]
c = K_wpQ_filt(x, h, g, h1, h2, h3, acoeff, bcoeff, temp_level)
t = np.arange(len(x))/float(Fs)
tc = np.linspace(t[0], t[-1], len(c))
s = np.real(c*np.exp(2j*np.pi*fc*Fs*tc))
sig = np.median(np.abs(c))/np.sqrt(np.pi/2.)
threshold = sig*raylinv(np.array([.999, ]), np.array([1, ]))
return c, s, threshold, Bw, fc
def get_xil(N, Y):
"""
it produces discrete frequencies of Fourier series
xil[i] = ZNl[i]/Y[i]
"""
xil = []
for m in np.arange(np.size(N)):
xil.append(np.arange(np.fix(-N[m]/2.), np.fix(N[m]/2.+0.5))/Y[m])
return xil
def RFSpline(self, x, u):
"""
u is continuous, find closest two u integers
this is for single x, mainly for finding roots
"""
u_lower = int(np.fix(u))
u_upper = int(np.fix(u)) + 1
return self.randmat[u_lower, x] + (u - u_lower) * (self.randmat[u_upper, x] - self.randmat[u_lower, x])
def RFSplineArray(self, u_array):
"""
this returns an array of Random Fields, length of u array
"""
u_lowers = np.fix(u_array)
u_uppers = np.fix(u_array) + 1
lower_fields = self.randmat.transpose()[zip(*enumerate(u_lowers))]
upper_fields = self.randmat.transpose()[zip(*enumerate(u_uppers))]
return lower_fields + (u_array - u_lowers) * (upper_fields - lower_fields)
def test_getitem_setitem_ellipsis():
s = Series(np.random.randn(10))
np.fix(s)
result = s[...]
assert_series_equal(result, s)
s[...] = 5
assert (result == 5).all()
def kurto(origin_time, info, opdict):
"""
Finds for each Waveloc event and for each station the best filtering
parameters for kurtosis computation.
Writes them into the dictionary info.
:param origin_time: origin time of the signal
:param info: dictionary of parameters
:param opdict: dictionary of the Waveloc parameters and options
:type origin_time: utcdatetime
:type info: dictionary
:type opdict: dictionary
:rtype: dictionary
:returns: info
"""
verbose = opdict['verbose']
kwin = opdict['kwin']
start_time = origin_time - 5.0
end_time = origin_time + 20.0
dt = info['dt']
# Trace
x = waveval(info['data_ini'], start_time, end_time, dt, info['tdeb_data'])
if not x.any() and x.all():
return info
# Initial kurtosis (trace filtered between 4-10Hz)
kurtx = waveval(info['kurt_ini'], start_time, end_time, dt,
info['tdeb_kurt'])
kurtx = smooth(kurtx)
N = len(x)
N2 = np.log2(N) - 7
nlevel = int(np.fix(N2))
snr_ref = np.max(np.abs(x)) / np.mean(np.abs(x))
snr_kurt_ref = np.max(np.abs(kurtx)) / np.mean(np.abs(kurtx))
kmax_ref = np.max(kurtx) # maximum of the kurtosis
# Compute the kurtogram and keep best frequencies
if verbose:
import matplotlib.gridspec as gridspec
G = gridspec.GridSpec(3, 2)
fig = plt.figure(figsize=(15, 6))
fig.set_facecolor('white')
fig.add_subplot(G[:, 0])
Kwav, Level_w, freq_w, c, f_lower, f_upper = \
Fast_Kurtogram(np.array(x, dtype=float), nlevel, verbose, Fs=1/dt,
opt2=1)
# Comparison of the kurtosis computed in the new frequency band and the old
# one (criterion : snr, kmax)
# 1. Read the initial data
wf = Waveform()
wf.read_from_file(info['data_file'],
starttime=start_time - kwin,
endtime=end_time + kwin)
nbpts = int(kwin * 1. / dt)
# 2. Filter the trace with kurtogram frequencies
wf.bp_filter(f_lower, f_upper)
x_filt = wf.values
x_filt = x_filt[nbpts:-nbpts]
# 3. Compute the kurtosis
wf.process_kurtosis(kwin, recursive=opdict['krec'])
new_kurtx = wf.values
if opdict['krec']:
new_kurtx = new_kurtx[nbpts + 1:-nbpts - 1]
else:
new_kurtx = new_kurtx[:-nbpts - 1]
snr = np.max(np.abs(x_filt)) / np.mean(np.abs(x_filt))
snr_kurt = np.max(np.abs(new_kurtx)) / np.mean(np.abs(new_kurtx))
kmax = np.max(new_kurtx)
if snr > snr_ref and kmax >= kmax_ref:
info['filter'].append(
(round(f_lower * 100) / 100, round(f_upper * 100) / 100))
if 'new_kurt_file' in info:
info = write_file(info, start_time, end_time, new_kurtx)
else:
info['filter'].append((0, 50))
if verbose and snr > 3:
print "snr:", snr, " ; snr_ref:", snr_ref
print "snr new kurtosis:", snr_kurt, " ; snr kurtosis reference:",\
snr_kurt_ref
print "kurtosis max, kurt_ref :", kmax, kmax_ref
plot_trace(fig, G, x, x_filt, kurtx, new_kurtx, info, f_lower, f_upper,
snr, snr_ref, snr_kurt, kmax, kmax_ref, origin_time)
plt.show()
return info
def fix(arr):
return np.fix(arr)
# x1 = qq1
# y1 = qq2
# x2 = qq3
# y2 = qq4
# for i in range(len(total_boxes)):
# print('lll', x1[i], y1[i], x2[i], y2[i])
# plt.gca().add_patch(
# plt.Rectangle((x1[i], y1[i]), x2[i] - x1[i], y2[i] - y1[i], edgecolor='r', facecolor='none'))
# --韦访添加
# plt.imshow(scale_img)
# plt.show()
# exit()
total_boxes = np.transpose(
np.vstack([qq1, qq2, qq3, qq4, total_boxes[:, 4]]))
total_boxes = align.detect_face.rerec(total_boxes.copy())
total_boxes[:, 0:4] = np.fix(total_boxes[:, 0:4]).astype(np.int32)
dy, edy, dx, edx, y, ey, x, ex, tmpw, tmph = align.detect_face.pad(
total_boxes.copy(), w, h)
# R-Net
numbox = total_boxes.shape[0]
if numbox > 0:
# second stage R-Net 对于P-Net输出的bb，缩放到24x24大小
tempimg = np.zeros((24, 24, 3, numbox))
for k in range(0, numbox):
tmp = np.zeros((int(tmph[k]), int(tmpw[k]), 3))
tmp[dy[k] - 1:edy[k], dx[k] - 1:edx[k], :] = img[y[k] - 1:ey[k],
x[k] - 1:ex[k], :]
if tmp.shape[0] > 0 and tmp.shape[1] > 0 or tmp.shape[
0] == 0 and tmp.shape[1] == 0:
# R-Net输入大小为24*24，所以要进行缩放
def LinearRegression_KFold_Sort(Subjects_Data, Subjects_Score, Fold_Quantity,
ResultantFolder, Permutation_Flag):
if not os.path.exists(ResultantFolder):
os.mkdir(ResultantFolder)
Subjects_Quantity = len(Subjects_Score)
# Sort the subjects score
Sorted_Index = np.argsort(Subjects_Score)
Subjects_Data = Subjects_Data[Sorted_Index, :]
Subjects_Score = Subjects_Score[Sorted_Index]
EachFold_Size = np.int(np.fix(np.divide(Subjects_Quantity, Fold_Quantity)))
MaxSize = EachFold_Size * Fold_Quantity
EachFold_Max = np.ones(Fold_Quantity, np.int) * MaxSize
tmp = np.arange(Fold_Quantity - 1, -1, -1)
EachFold_Max = EachFold_Max - tmp
Remain = np.mod(Subjects_Quantity, Fold_Quantity)
for j in np.arange(Remain):
EachFold_Max[j] = EachFold_Max[j] + Fold_Quantity
Fold_Corr = []
Fold_MAE = []
Fold_Weight = []
for j in np.arange(Fold_Quantity):
Fold_J_Index = np.arange(j, EachFold_Max[j], Fold_Quantity)
Subjects_Data_test = Subjects_Data[Fold_J_Index, :]
Subjects_Score_test = Subjects_Score[Fold_J_Index]
Subjects_Data_train = np.delete(Subjects_Data, Fold_J_Index, axis=0)
Subjects_Score_train = np.delete(Subjects_Score, Fold_J_Index)
if Permutation_Flag:
# If doing permutation, the training scores should be permuted, while the testing scores remain
Subjects_Index_Random = np.arange(len(Subjects_Score_train))
np.random.shuffle(Subjects_Index_Random)
Subjects_Score_train = Subjects_Score_train[Subjects_Index_Random]
if j == 0:
RandIndex = {'Fold_0': Subjects_Index_Random}
else:
RandIndex['Fold_' + str(j)] = Subjects_Index_Random
normalize = preprocessing.MinMaxScaler()
Subjects_Data_train = normalize.fit_transform(Subjects_Data_train)
Subjects_Data_test = normalize.transform(Subjects_Data_test)
clf = linear_model.LinearRegression()
clf.fit(Subjects_Data_train, Subjects_Score_train)
Fold_J_Score = clf.predict(Subjects_Data_test)
Fold_J_Corr = np.corrcoef(Fold_J_Score, Subjects_Score_test)
Fold_J_Corr = Fold_J_Corr[0, 1]
Fold_Corr.append(Fold_J_Corr)
Fold_J_MAE = np.mean(
np.abs(np.subtract(Fold_J_Score, Subjects_Score_test)))
Fold_MAE.append(Fold_J_MAE)
Fold_J_result = {
'Index': Fold_J_Index,
'Test_Score': Subjects_Score_test,
'Predict_Score': Fold_J_Score,
'Corr': Fold_J_Corr,
'MAE': Fold_J_MAE
}
Fold_J_FileName = 'Fold_' + str(j) + '_Score.mat'
ResultantFile = os.path.join(ResultantFolder, Fold_J_FileName)
sio.savemat(ResultantFile, Fold_J_result)
Fold_Corr = [0 if np.isnan(x) else x for x in Fold_Corr]
Mean_Corr = np.mean(Fold_Corr)
Mean_MAE = np.mean(Fold_MAE)
Res_NFold = {
'Mean_Corr': Mean_Corr,
'Mean_MAE': Mean_MAE
}
ResultantFile = os.path.join(ResultantFolder, 'Res_NFold.mat')
sio.savemat(ResultantFile, Res_NFold)
return (Mean_Corr, Mean_MAE)
def colifilt(X, ha, hb):
""" Filter the columns of image X using the two filters ha and hb =
reverse(ha). ha operates on the odd samples of X and hb on the even
samples. Both filters should be even length, and h should be approx linear
phase with a quarter sample advance from its mid pt (i.e `:math:`|h(m/2)| >
|h(m/2 + 1)|`).
.. code-block:: text
ext left edge right edge ext
Level 2: ! | ! | !
+q filt on x b b a a a a b b
-q filt on o a a b b b b a a
Level 1: ! | ! | !
odd filt on . b b b b a a a a a a a a b b b b
odd filt on . a a a a b b b b b b b b a a a a
The output is interpolated by two from the input sample rate and the
results from the two filters, Ya and Yb, are interleaved to give Y.
Symmetric extension with repeated end samples is used on the composite X
columns before each filter is applied.
.. codeauthor:: Rich Wareham <*****@*****.**>, August 2013
.. codeauthor:: Cian Shaffrey, Cambridge University, August 2000
.. codeauthor:: Nick Kingsbury, Cambridge University, August 2000
"""
# Make sure all inputs are arrays
X = asfarray(X)
ha = asfarray(ha)
hb = asfarray(hb)
r, c = X.shape
if r % 2 != 0:
raise ValueError('No. of rows in X must be a multiple of 2')
if ha.shape != hb.shape:
raise ValueError('Shapes of ha and hb must be the same')
if ha.shape[0] % 2 != 0:
raise ValueError('Lengths of ha and hb must be even')
m = ha.shape[0]
m2 = np.fix(m * 0.5)
Y = np.zeros((r * 2, c), dtype=X.dtype)
if not np.any(np.nonzero(X[:])[0]):
return Y
if m2 % 2 == 0:
# m/2 is even, so set up t to start on d samples.
# Set up vector for symmetric extension of X with repeated end samples.
# Use 'reflect' so r < m2 works OK.
xe = reflect(np.arange(-m2, r + m2, dtype=np.int), -0.5, r - 0.5)
t = np.arange(3, r + m, 2)
if np.sum(ha * hb) > 0:
ta = t
tb = t - 1
else:
ta = t - 1
tb = t
# Select odd and even samples from ha and hb. Note that due to 0-indexing
# 'odd' and 'even' are not perhaps what you might expect them to be.
hao = as_column_vector(ha[0:m:2])
hae = as_column_vector(ha[1:m:2])
hbo = as_column_vector(hb[0:m:2])
hbe = as_column_vector(hb[1:m:2])
s = np.arange(0, r * 2, 4)
Y[s, :] = _column_convolve(X[xe[tb - 2], :], hae)
Y[s + 1, :] = _column_convolve(X[xe[ta - 2], :], hbe)
Y[s + 2, :] = _column_convolve(X[xe[tb], :], hao)
Y[s + 3, :] = _column_convolve(X[xe[ta], :], hbo)
else:
# m/2 is odd, so set up t to start on b samples.
# Set up vector for symmetric extension of X with repeated end samples.
# Use 'reflect' so r < m2 works OK.
xe = reflect(np.arange(-m2, r + m2, dtype=np.int), -0.5, r - 0.5)
t = np.arange(2, r + m - 1, 2)
if np.sum(ha * hb) > 0:
ta = t
tb = t - 1
else:
ta = t - 1
tb = t
# Select odd and even samples from ha and hb. Note that due to 0-indexing
# 'odd' and 'even' are not perhaps what you might expect them to be.
hao = as_column_vector(ha[0:m:2])
hae = as_column_vector(ha[1:m:2])
hbo = as_column_vector(hb[0:m:2])
hbe = as_column_vector(hb[1:m:2])
s = np.arange(0, r * 2, 4)
Y[s, :] = _column_convolve(X[xe[tb], :], hao)
Y[s + 1, :] = _column_convolve(X[xe[ta], :], hbo)
Y[s + 2, :] = _column_convolve(X[xe[tb], :], hae)
Y[s + 3, :] = _column_convolve(X[xe[ta], :], hbe)
return Y
Remove the decimals, and return the float number closest to zero. Use the trunc() and fix() functions. Example Truncate elements of following array: import numpy as np arr = np.trunc([-3.1666, 3.6667]) print(arr) Example Same example, using fix(): import numpy as np arr = np.fix([-3.1666, 3.6667]) print(arr) Rounding The around() function increments preceding digit or decimal by 1 if >=5 else do nothing. E.g. round off to 1 decimal point, 3.16666 is 3.2 Example Round off 3.1666 to 2 decimal places: import numpy as np arr = np.around(3.1666, 2) print(arr)
def double2time(v):
hh = np.int32(np.fix(v / 3600.))
mm = np.int32(np.fix((v - hh * 3600) / 60.))
ss = v - hh * 3600. - mm * 60.
return "%02d" % hh + ":%02d" % mm + ":%07.4f" % ss
def detect_face_base_pr_net(input_image, p_predict_func, r_predict_func):
img = misc.imread(input_image, mode='RGB')
h, w, _ = img.shape
minsize = np.min([h, w])
m = 12 / math.floor(minsize * 0.1)
minsize = minsize * m
factor_count = 0
factor = 0.709 #scale factor
scales = []
while (minsize >= 12):
scales.append(m * np.power(factor, factor_count))
minsize = minsize * factor
factor_count += 1
total_boxes = np.empty((0, 9))
# print("scale num" + str(len(scales)))
for i in range(len(scales)):
hs = int(np.ceil(h * scales[i]))
ws = int(np.ceil(w * scales[i]))
new_img = cv2.resize(img, (ws, hs), interpolation=cv2.INTER_AREA)
image = np.expand_dims(new_img, axis=0)
predict_result = p_predict_func([image])
pre_label = predict_result[0]
pre_box = predict_result[1]
boxes, _ = generateBoundingBox(predict_result[0][0, :, :, 1],
predict_result[1][0, :, :, ], scales[i],
0.6)
pick = nms(boxes.copy(), 0.5, 'Union')
if boxes.size > 0 and pick.size > 0:
boxes = boxes[pick, :]
total_boxes = np.append(total_boxes, boxes, axis=0)
numbox = total_boxes.shape[0] #239
if numbox > 0:
pick = nms(total_boxes.copy(), 0.7, 'Union') # return (239,)
total_boxes = total_boxes[pick, :]
bbw = total_boxes[:, 2] - total_boxes[:, 0]
bbh = total_boxes[:, 3] - total_boxes[:, 1]
x1 = total_boxes[:, 0] + total_boxes[:, 5] * bbw
y1 = total_boxes[:, 1] + total_boxes[:, 6] * bbh
x2 = total_boxes[:, 2] + total_boxes[:, 7] * bbw
y2 = total_boxes[:, 3] + total_boxes[:, 8] * bbh
total_boxes = np.transpose(
np.vstack([x1, y1, x2, y2,
total_boxes[:,
4]])) # (239, 5) 4:xmin,ymin,xmax,ymax,prob
total_boxes = rerec(total_boxes.copy())
total_boxes[:, 0:4] = np.fix(total_boxes[:, 0:4]).astype(np.int32)
dy, edy, dx, edx, y, ey, x, ex, tmpw, tmph = pad(
total_boxes.copy(), w, h)
# pdb.set_trace()
numbox = total_boxes.shape[0] #239
if numbox > 0:
# second stage
tempimg = np.zeros((numbox, 24, 24, 3))
for k in range(0, numbox):
tmp = np.zeros((int(tmph[k]), int(tmpw[k]), 3))
tmp[dy[k] - 1:edy[k], dx[k] - 1:edx[k], :] = img[y[k] - 1:ey[k],
x[k] - 1:ex[k], :]
if tmp.shape[0] > 0 and tmp.shape[1] > 0 or tmp.shape[
0] == 0 and tmp.shape[1] == 0:
tempimg[k, :, :, :] = cv2.resize(tmp, (24, 24),
interpolation=cv2.INTER_AREA)
else:
return np.empty()
out = r_predict_func([tempimg])
out0 = np.transpose(out[0]) #classification
out1 = np.transpose(out[1]) #regression
score = out0[1, :]
ipass = np.where(score > 0.7)
total_boxes = np.hstack([
total_boxes[ipass[0], 0:4].copy(),
np.expand_dims(score[ipass].copy(), 1)
])
mv = out1[:, ipass[0]]
if total_boxes.shape[0] > 0:
pick = nms(total_boxes, 0.7, 'Union')
total_boxes = total_boxes[pick, :]
total_boxes = bbreg(total_boxes.copy(), np.transpose(mv[:, pick]))
total_boxes = rerec(total_boxes.copy())
# numbox = total_boxes.shape[0]
# print(numbox)
# for i in range(numbox):
# boxes = total_boxes[i,0:-1]
# cv2.rectangle(img, (int(boxes[0]),int(boxes[1])), (int(boxes[2]),int(boxes[3])), (0,255,0))
# misc.imsave(str(uuid.uuid4()) + '.jpg', img)
# print("over=====")
return total_boxes
def detect_face(img, minsize, pnet, rnet, onet, threshold, factor):
"""Detects faces in an image, and returns bounding boxes and points for them.
img: input image
minsize: minimum faces' size
pnet, rnet, onet: caffemodel
threshold: threshold=[th1, th2, th3], th1-3 are three steps's threshold
factor: the factor used to create a scaling pyramid of face sizes to detect in the image.
"""
# !!! https://www.cnblogs.com/the-home-of-123/p/9857056.html 代码注释 others
factor_count = 0
total_boxes = np.empty((0, 9)) # (2>q1+2>q2+1>score+4>reg)>>9
points = np.empty(0)
h = img.shape[0]
w = img.shape[1]
minl = np.amin([h, w])
# 为了贴合不同应用场景，有的场景人脸大，有的人脸小。
# 因此，在常用每个像素点对应12*12的感受野下，如果想弄成20*20的感受野的话，就需要把原图缩小12/minsize(20) = 0.6的比例，作为新的原图输入网络。
m = 12.0 / minsize
minl = minl * m
# create scale pyramid 金字塔每一级缩小百分比，第一级是 12/minsize(20) = 0.6>>新的原图，第二级是 新的原图0.6 * 0.704^2，第三级是 新的原图0.6 * 0.704^3
# 一直缩小缩小金字塔层图，直到缩小到短边的边长(像素点个数), 大于感受野的边长12为止。
scales = [] # 存储每层缩小的比率(缩小过程中固定长宽比)
while minl >= 12:
scales += [m * np.power(factor, factor_count)]
minl = minl * factor
factor_count += 1
# first stage
for scale in scales:
hs = int(np.ceil(h * scale))
ws = int(np.ceil(w * scale))
im_data = imresample(img, (hs, ws)) # 下采样图片缩小
im_data = (im_data - 127.5) / 128.0 # 图片归一化，255/2 ，归一化到 [-1，1]，收敛更快
img_x = np.expand_dims(im_data, 0) # array 多套一层括号
img_y = np.transpose(img_x, (0, 2, 1, 3)) #
out = pnet(img_y) # pnet的输出结果
out0 = np.transpose(out[0], (0, 2, 1, 3))
out1 = np.transpose(out[1], (0, 2, 1, 3))
# out0 是边框偏度(tx,ty,tw,th)，out1 是是否有人脸
boxes, _ = generateBoundingBox(out1[0, :, :, 1].copy(), out0[0, :, :, :].copy(), scale, threshold[0])
# inter-scale nms
pick = nms(boxes.copy(), 0.5, 'Union')
if boxes.size > 0 and pick.size > 0:
boxes = boxes[pick, :]
total_boxes = np.append(total_boxes, boxes, axis=0) # 每种规模都会找出一些box，每种规模找出的满足阈值条件的box个数会有不同多个，不管是何种规模，都append到一起作为候选框 ，存放在 total里 [n_boxs, 9]
numbox = total_boxes.shape[0]
if numbox > 0:
pick = nms(total_boxes.copy(), 0.7, 'Union') # ###提高阈值，进一步进行nms
total_boxes = total_boxes[pick, :] # q1和q2是原始图片的左上右下坐标 (2：q1+2：q2+1：score+4：reg) >> [x1,y1,x2,y2,score,tx1,ty1,tx2,ty2] >> 9
regw = total_boxes[:, 2] - total_boxes[:, 0]
regh = total_boxes[:, 3] - total_boxes[:, 1]
qq1 = total_boxes[:, 0] + total_boxes[:, 5] * regw # 先做平移，在左上角原始坐标上，放缩tx倍的w宽度，得到原始图片上的坐标位置
qq2 = total_boxes[:, 1] + total_boxes[:, 6] * regh # 先做平移，在左上角原始坐标上，放缩ty倍的h高度，得到原始图片上的坐标位置
qq3 = total_boxes[:, 2] + total_boxes[:, 7] * regw # 先做平移，在右下角原始坐标上，放缩tx倍的w宽度，得到原始图片上的坐标位置
qq4 = total_boxes[:, 3] + total_boxes[:, 8] * regh # 先做平移，在右下角原始坐标上，放缩ty倍的h高度，得到原始图片上的坐标位置
total_boxes = np.transpose(np.vstack([qq1, qq2, qq3, qq4, total_boxes[:, 4]])) # 依次为平移后的左上角，右下角坐标及该部分得分 [n_boxs, 5]
total_boxes = rerec(total_boxes.copy()) #平移左上角和右下角后，进行延伸，变成正方型
total_boxes[:, 0:4] = np.fix(total_boxes[:, 0:4]).astype(np.int32) # 修正后的坐标'向上取整，得到新的坐标点
dy, edy, dx, edx, y, ey, x, ex, tmpw, tmph = pad(total_boxes.copy(), w, h) # 对坐标进行修剪，使其不超出图片大小，返回[新bbox平移???], [新box下标] ,[bbox旧宽度，bbox旧高度]
numbox = total_boxes.shape[0]
if numbox > 0:
# second stage
tempimg = np.zeros((24, 24, 3, numbox)) # pnet的输出，先进行剪裁再下采样之后，存储在矩阵24*24*3*numbox中，用于输入到rnet
for k in range(0, numbox):
tmp = np.zeros((int(tmph[k]), int(tmpw[k]), 3)) # 候选框第一个图片
tmp[dy[k] - 1:edy[k], dx[k] - 1:edx[k], :] = img[y[k] - 1:ey[k], x[k] - 1:ex[k], :] #剪裁？？？
if tmp.shape[0] > 0 and tmp.shape[1] > 0 or tmp.shape[0] == 0 and tmp.shape[1] == 0:
tempimg[:, :, :, k] = imresample(tmp, (24, 24)) # 下采样
else:
return np.empty()
tempimg = (tempimg - 127.5) / 128.0
tempimg1 = np.transpose(tempimg, (3, 1, 0, 2))
out = rnet(tempimg1)
out0 = np.transpose(out[0]) # 回归预测框坐标偏置
out1 = np.transpose(out[1]) # 预测得分
score = out1[1, :]
ipass = np.where(score > threshold[1]) # 筛选人脸高概率的像素点
total_boxes = np.hstack([total_boxes[ipass[0], 0:4].copy(), np.expand_dims(score[ipass].copy(), 1)]) # 筛选人脸高概率的像素点对应的边框
mv = out0[:, ipass[0]] # 筛选人脸高概率的像素点对应的边框偏置
if total_boxes.shape[0] > 0:
pick = nms(total_boxes, 0.7, 'Union') # 对rnet的结果进行nms筛选
total_boxes = total_boxes[pick, :] # 提取筛选结果
total_boxes = bbreg(total_boxes.copy(), np.transpose(mv[:, pick])) # 用偏置修正边框
total_boxes = rerec(total_boxes.copy())
numbox = total_boxes.shape[0]
if numbox > 0:
# third stage
total_boxes = np.fix(total_boxes).astype(np.int32) # 将rnet的输出结果进行向下取整，得到候选框，[x1,y1,x2,y2,score]
dy, edy, dx, edx, y, ey, x, ex, tmpw, tmph = pad(total_boxes.copy(), w, h) # 原始bbox窗大小 (956,956,3)，但是x1=-1，超出了原始图片的下界0，
tempimg = np.zeros((48, 48, 3, numbox))
for k in range(0, numbox):
tmp = np.zeros((int(tmph[k]), int(tmpw[k]), 3)) # 原始bbox窗大小 (956,956,3)，但是x1=-1，超出了原始图片的下界0，
tmp[dy[k] - 1:edy[k], dx[k] - 1:edx[k], :] = img[y[k] - 1:ey[k], x[k] - 1:ex[k], :] # (956, 953, 3)
if tmp.shape[0] > 0 and tmp.shape[1] > 0 or tmp.shape[0] == 0 and tmp.shape[1] == 0:
tempimg[:, :, :, k] = imresample(tmp, (48, 48))
else:
return np.empty()
tempimg = (tempimg - 127.5) / 128.0
tempimg1 = np.transpose(tempimg, (3, 1, 0, 2))
out = onet(tempimg1)
out0 = np.transpose(out[0]) # 偏置
out1 = np.transpose(out[1]) # 眼睛2，嘴角2，鼻子1，5点 * 2（x, y) ,总共10个数
out2 = np.transpose(out[2]) # 是否有脸的概率
score = out2[1, :]
points = out1
ipass = np.where(score > threshold[2])
points = points[:, ipass[0]] # 5点的x和y坐标的偏置系数 顺序>> [x左眼，x右眼，x鼻子，x左嘴角，x右嘴角; y左眼，y右眼，y鼻子，y左嘴角，y右嘴角]，“point[01234] * w”为 box坐标系中的点x坐标值，，“point[56789] * h”为 box坐标系中的5点y坐标值
total_boxes = np.hstack([total_boxes[ipass[0], 0:4].copy(), np.expand_dims(score[ipass].copy(), 1)]) # 最终的高概率像素点对应的候选框--在原始图片上的坐标x1y1x2y2
mv = out0[:, ipass[0]] # 最终的高概率像素点对应的待修正偏移量
w = total_boxes[:, 2] - total_boxes[:, 0] + 1
h = total_boxes[:, 3] - total_boxes[:, 1] + 1
points[0:5, :] = np.tile(w, (5, 1)) * points[0:5, :] + np.tile(total_boxes[:, 0], (5, 1)) - 1 # 在原有box上五点mark5点的x坐标进行修正=“point[01234] * w”为 box坐标系中的点x坐标值 + 原始图片上box所在位置左上角x1的坐标值”，从而得到原始图片坐标系上5点的x坐标值
points[5:10, :] = np.tile(h, (5, 1)) * points[5:10, :] + np.tile(total_boxes[:, 1], (5, 1)) - 1 # 同上一行，x变成y就可以了；新的points里面存的是原始图片坐标系下 landmark坐标信息 [x左眼，x右眼，x鼻子，x左嘴角，x右嘴角; y左眼，y右眼，y鼻子，y左嘴角，y右嘴角]
if total_boxes.shape[0] > 0:
total_boxes = bbreg(total_boxes.copy(), np.transpose(mv)) # 用onet的4坐标值偏置修正边框
pick = nms(total_boxes.copy(), 0.7, 'Min')
total_boxes = total_boxes[pick, :]
points = points[:, pick]
return total_boxes, points # 返回原始图片上坐标信息和人脸概率分数 [x1,y1,x2,y2,score]，[x左眼，x右眼，x鼻子，x左嘴角，x右嘴角; y左眼，y右眼，y鼻子，y左嘴角，y右嘴角]
def detect_face(img, gts, imgpath, p_model):
image_copy = cv2.imread(imgpath)
factor = 0.709
minsize = 20
factor_count = 0
total_boxes = np.zeros((0, 9), np.float)
h = img.shape[0]
w = img.shape[1]
minl = min(h, w)
img = img.astype(float)
m = 12.0 / minsize
minl = minl * m # 0.6倍的宽一直到12
# create scale pyramid
scales = [0.6]
while minl >= 12:
scales.append(m * pow(factor, factor_count))
minl *= factor
factor_count += 1
for scale in scales:
hs = int(np.ceil(h * scale))
ws = int(np.ceil(w * scale))
img_x = transform.resize(img, (hs, ws))
img_data = image_generalize(img_x)
img_data = np.expand_dims(img_data, axis=0)
img_data1 = img_data
out = p_model.predict(img_data)
cla = out[0][0, :, :, 0]
bbox = out[1][0]
#print(cla.shape)
boxes = generateBoundingBox(cla, bbox, scale, 0.6)
if boxes.shape[0] != 0:
pick = nms(boxes, 0.5, 'Union')
#print('pick:',pick)
if len(pick) > 0:
boxes = boxes[pick, :]
if boxes.shape[0] != 0:
total_boxes = np.concatenate((total_boxes, boxes), axis=0)
numbox = total_boxes.shape[0]
if numbox > 0:
# nms
pick = nms(total_boxes, 0.7, 'Union')
if len(pick) > 0:
total_boxes = total_boxes[pick, :]
# revise and convert to square
regh = total_boxes[:, 3] - total_boxes[:, 1]
regw = total_boxes[:, 2] - total_boxes[:, 0]
t1 = total_boxes[:, 0] + total_boxes[:, 5] * regw
t2 = total_boxes[:, 1] + total_boxes[:, 6] * regh
t3 = total_boxes[:, 2] + total_boxes[:, 7] * regw
t4 = total_boxes[:, 3] + total_boxes[:, 8] * regh
total_boxes = np.array([t1, t2, t3, t4]).T
total_boxes = rerec(total_boxes)
#print("[4]:",total_boxes.shape[0])
total_boxes[:, 0:4] = np.fix(total_boxes[:, 0:4])
#print("[4.5]:",total_boxes.shape[0])
[dy, edy, dx, edx, y, ey, x, ex, tmpw,
tmph] = pad(total_boxes, w, h)
#print( tmpw[11], tmph[11])
numbox = total_boxes.shape[0]
if numbox > 0:
# second stage
# construct input for RNet
tempimg = np.zeros((numbox, 24, 24, 3)) # (24, 24, 3, numbox)
for k in range(numbox):
if tmph[k] < 0 or tmpw[k] < 0 or int(
x[k]) == int(ex[k]) + 1 or int(y[k]) == int(ey[k]) + 1:
continue
tmp = np.zeros((int(tmph[k]) + 1, int(tmpw[k]) + 1, 3))
try:
tmp[int(dy[k]):int(edy[k]) + 1,
int(dx[k]):int(edx[k]) +
1] = image_copy[int(y[k]):int(ey[k]) + 1,
int(x[k]):int(ex[k]) + 1]
resized_img = cv2.resize(tmp, (24, 24),
interpolation=cv2.INTER_LINEAR)
crop = [int(x[k]), int(y[k]), int(ex[k] + 1), int(ey[k] + 1)]
size = int(ey[k]) + 1 - int(y[k]) + 1
Iou, index = IoU2(crop, gts)
if (Iou >= 0.65):
global p_idx
offset_x1 = (gts[index][0] - crop[0]) / float(size)
offset_y1 = (gts[index][1] - crop[1]) / float(size)
offset_x2 = (gts[index][2] - crop[2]) / float(size)
offset_y2 = (gts[index][3] - crop[3]) / float(size)
save_file = os.path.join(pos_save_dir, "%s.jpg" % p_idx)
f1.write(pos_save_dir + '/' + "%s" % p_idx + '.jpg' +
' 1 %f %f %f %f\n' %
(offset_x1, offset_y1, offset_x2, offset_y2))
cv2.imwrite(save_file, resized_img)
p_idx += 1
elif (Iou >= 0.4):
global d_idx
offset_x1 = (gts[index][0] - crop[0]) / float(size)
offset_y1 = (gts[index][1] - crop[1]) / float(size)
offset_x2 = (gts[index][2] - crop[2]) / float(size)
offset_y2 = (gts[index][3] - crop[3]) / float(size)
save_file = os.path.join(part_save_dir, "%s.jpg" % d_idx)
f3.write(part_save_dir + '/' + "%s" % d_idx + '.jpg' +
' -1 %f %f %f %f\n' %
(offset_x1, offset_y1, offset_x2, offset_y2))
cv2.imwrite(save_file, resized_img)
d_idx += 1
elif (Iou < 0.3):
global n_idx
save_file = os.path.join(neg_save_dir, "%s.jpg" % n_idx)
f2.write(neg_save_dir + '/' + "%s" % n_idx + '.jpg' +
' 0 -1 -1 -1 -1\n')
cv2.imwrite(save_file, resized_img)
n_idx += 1
except:
continue
global total_idx
total_idx += 1
if total_idx % 50 == 0:
print('total:', total_idx)
print('positive:', p_idx)
print('negative:', n_idx)
print('part:', d_idx)
def fixp(self, y, scaling='mult'):
"""
Return fixed-point integer or fractional representation for `y`
(scalar or array-like) with the same shape as `y`.
Saturation / two's complement wrapping happens outside the range +/- MSB,
requantization (round, floor, fix, ...) is applied on the ratio `y / LSB`.
Parameters
----------
y: scalar or array-like object
input value (floating point format) to be quantized
scaling: String
Determine the scaling before and after quantizing / saturation
*'mult'* float in, int out:
`y` is multiplied by `self.scale` *before* quantizing / saturating
**'div'**: int in, float out:
`y` is divided by `self.scale` *after* quantizing / saturating.
**'multdiv'**: float in, float out (default):
both of the above
For all other settings, `y` is transformed unscaled.
Returns
-------
float scalar or ndarray
with the same shape as `y`, in the range
`-2*self.MSB` ... `2*self.MSB-self.LSB`
Examples:
---------
>>> q_obj_a = {'WI':1, 'WF':6, 'ovfl':'sat', 'quant':'round'}
>>> myQa = Fixed(q_obj_a) # instantiate fixed-point object myQa
>>> myQa.resetN() # reset overflow counter
>>> a = np.arange(0,5, 0.05) # create input signal
>>> aq = myQa.fixed(a) # quantize input signal
>>> plt.plot(a, aq) # plot quantized vs. original signal
>>> print(myQa.N_over, "overflows!") # print number of overflows
>>> # Convert output to same format as input:
>>> b = np.arange(200, dtype = np.int16)
>>> btype = np.result_type(b)
>>> # MSB = 2**7, LSB = 2**2:
>>> q_obj_b = {'WI':7, 'WF':-2, 'ovfl':'wrap', 'quant':'round'}
>>> myQb = Fixed(q_obj_b) # instantiate fixed-point object myQb
>>> bq = myQb.fixed(b)
>>> bq = bq.astype(btype) # restore original variable type
"""
#======================================================================
# (1) : Convert input argument into proper floating point scalars /
# arrays and initialize flags
#======================================================================
if np.shape(y):
# create empty arrays for result and overflows with same shape as y
# for speedup, test for invalid types
SCALAR = False
y = np.asarray(y) # convert lists / tuples / ... to numpy arrays
yq = np.zeros(y.shape)
over_pos = over_neg = np.zeros(y.shape, dtype=bool)
self.ovr_flag = np.zeros(y.shape, dtype=int)
if np.issubdtype(y.dtype, np.number):
pass
elif y.dtype.kind in {'U', 'S'}: # string or unicode
try:
y = y.astype(np.float64) # try to convert to float
except (TypeError, ValueError):
try:
np.char.replace(y, ' ', '') # remove all whitespace
y = y.astype(complex) # try to convert to complex
except (TypeError, ValueError
) as e: # try converting elements recursively
y = list(
map(
lambda y_scalar: self.fixp(y_scalar,
scaling=scaling),
y))
else:
logger.error("Argument '{0}' is of type '{1}',\n"
"cannot convert to float.".format(y, y.dtype))
y = np.zeros(y.shape)
else:
SCALAR = True
# get rid of errors that have occurred upstream
if y is None or str(y) == "":
y = 0
# If y is not a number, convert to string, remove whitespace and convert
# to complex format:
elif not np.issubdtype(type(y), np.number):
y = qstr(y)
y = y.replace(' ', '') # remove all whitespace
try:
y = float(y)
except (TypeError, ValueError):
try:
y = complex(y)
except (TypeError, ValueError) as e:
logger.error("Argument '{0}' yields \n {1}".format(
y, e))
y = 0.0
over_pos = over_neg = yq = 0
self.ovr_flag = 0
# convert pseudo-complex (imag = 0) and complex values to real
y = np.real_if_close(y)
if np.iscomplexobj(y):
logger.warning(
"Casting complex values to real before quantization!")
# quantizing complex objects is not supported yet
y = y.real
scaling = scaling.lower()
y_in = y # y before scaling / quantizing
#======================================================================
# (2) : Multiply by `scale` factor before requantization and saturation
# when `scaling=='mult'`or 'multdiv'
#======================================================================
y = y / self.LSB
if scaling in {'mult', 'multdiv'}:
y = y * self.scale
#======================================================================
# (3) : Divide by LSB and apply selected quantization method to convert
# floating point inputs to "fixpoint integers" arrays
# Next, multiply by LSB to restore original scale
#=====================================================================
if self.quant == 'floor':
yq = np.floor(y)
# largest integer i, such that i <= x (= binary truncation)
elif self.quant == 'round':
yq = np.round(y)
# rounding, also = binary rounding
elif self.quant == 'fix':
yq = np.fix(y)
# round to nearest integer towards zero ("Betragsschneiden")
elif self.quant == 'ceil':
yq = np.ceil(y)
# smallest integer i, such that i >= x
elif self.quant == 'rint':
yq = np.rint(y)
# round towards nearest int
elif self.quant == 'none':
yq = y
# return unquantized value
else:
raise Exception('Unknown Requantization type "%s"!' % (self.quant))
yq = yq * self.LSB
logger.debug("y_in={0} | y={1} | yq={2}".format(y_in, y, yq))
#======================================================================
# (4) : Handle Overflow / saturation in relation to MSB
#=====================================================================
if self.ovfl == 'none':
pass
else:
# Bool. vectors with '1' for every neg./pos overflow:
over_neg = (yq < self.MIN)
over_pos = (yq > self.MAX)
# create flag / array of flags for pos. / neg. overflows
self.ovr_flag = over_pos.astype(int) - over_neg.astype(int)
# No. of pos. / neg. / all overflows occured since last reset:
self.N_over_neg += np.sum(over_neg)
self.N_over_pos += np.sum(over_pos)
self.N_over = self.N_over_neg + self.N_over_pos
# Replace overflows with Min/Max-Values (saturation):
if self.ovfl == 'sat':
yq = np.where(over_pos, self.MAX, yq) # (cond, true, false)
yq = np.where(over_neg, self.MIN, yq)
# Replace overflows by two's complement wraparound (wrap)
elif self.ovfl == 'wrap':
yq = np.where(
over_pos | over_neg, yq - 4. * self.MSB * np.fix(
(np.sign(yq) * 2 * self.MSB + yq) / (4 * self.MSB)),
yq)
else:
raise Exception('Unknown overflow type "%s"!' % (self.ovfl))
return None
#======================================================================
# (5) : Divide result by `scale` factor when `scaling=='div'`or 'multdiv'
# - frmt2float()
# - input_coeffs when quantizing the coefficients
# float2frmt passes on the scaling argument
#======================================================================
if scaling in {'div', 'multdiv'}:
yq = yq / self.scale
if SCALAR and isinstance(yq, np.ndarray):
yq = yq.item() # convert singleton array to scalar
return yq
def infomax(data,
weights=None,
l_rate=None,
block=None,
w_change=1e-12,
anneal_deg=60.,
anneal_step=0.9,
extended=True,
n_subgauss=1,
kurt_size=6000,
ext_blocks=1,
max_iter=200,
random_state=None,
blowup=1e4,
blowup_fac=0.5,
n_small_angle=20,
use_bias=True,
verbose=None):
"""Run (extended) Infomax ICA decomposition on raw data.
Parameters
----------
data : np.ndarray, shape (n_samples, n_features)
The whitened data to unmix.
weights : np.ndarray, shape (n_features, n_features)
The initialized unmixing matrix.
Defaults to None, which means the identity matrix is used.
l_rate : float
This quantity indicates the relative size of the change in weights.
Defaults to ``0.01 / log(n_features ** 2)``.
.. note:: Smaller learning rates will slow down the ICA procedure.
block : int
The block size of randomly chosen data segments.
Defaults to floor(sqrt(n_times / 3.)).
w_change : float
The change at which to stop iteration. Defaults to 1e-12.
anneal_deg : float
The angle (in degrees) at which the learning rate will be reduced.
Defaults to 60.0.
anneal_step : float
The factor by which the learning rate will be reduced once
``anneal_deg`` is exceeded: ``l_rate *= anneal_step.``
Defaults to 0.9.
extended : bool
Whether to use the extended Infomax algorithm or not.
Defaults to True.
n_subgauss : int
The number of subgaussian components. Only considered for extended
Infomax. Defaults to 1.
kurt_size : int
The window size for kurtosis estimation. Only considered for extended
Infomax. Defaults to 6000.
ext_blocks : int
Only considered for extended Infomax. If positive, denotes the number
of blocks after which to recompute the kurtosis, which is used to
estimate the signs of the sources. In this case, the number of
sub-gaussian sources is automatically determined.
If negative, the number of sub-gaussian sources to be used is fixed
and equal to n_subgauss. In this case, the kurtosis is not estimated.
Defaults to 1.
max_iter : int
The maximum number of iterations. Defaults to 200.
%(random_state)s
blowup : float
The maximum difference allowed between two successive estimations of
the unmixing matrix. Defaults to 10000.
blowup_fac : float
The factor by which the learning rate will be reduced if the difference
between two successive estimations of the unmixing matrix exceededs
``blowup``: ``l_rate *= blowup_fac``. Defaults to 0.5.
n_small_angle : int | None
The maximum number of allowed steps in which the angle between two
successive estimations of the unmixing matrix is less than
``anneal_deg``. If None, this parameter is not taken into account to
stop the iterations. Defaults to 20.
use_bias : bool
This quantity indicates if the bias should be computed.
Defaults to True.
%(verbose)s
Returns
-------
unmixing_matrix : np.ndarray, shape (n_features, n_features)
The linear unmixing operator.
References
----------
.. [1] A. J. Bell, T. J. Sejnowski. An information-maximization approach to
blind separation and blind deconvolution. Neural Computation, 7(6),
1129-1159, 1995.
.. [2] T. W. Lee, M. Girolami, T. J. Sejnowski. Independent component
analysis using an extended infomax algorithm for mixed subgaussian
and supergaussian sources. Neural Computation, 11(2), 417-441, 1999.
"""
from scipy.stats import kurtosis
rng = check_random_state(random_state)
# define some default parameters
max_weight = 1e8
restart_fac = 0.9
min_l_rate = 1e-10
degconst = 180.0 / np.pi
# for extended Infomax
extmomentum = 0.5
signsbias = 0.02
signcount_threshold = 25
signcount_step = 2
# check data shape
n_samples, n_features = data.shape
n_features_square = n_features**2
# check input parameters
# heuristic default - may need adjustment for large or tiny data sets
if l_rate is None:
l_rate = 0.01 / math.log(n_features**2.0)
if block is None:
block = int(math.floor(math.sqrt(n_samples / 3.0)))
logger.info('Computing%sInfomax ICA' % ' Extended ' if extended else ' ')
# collect parameters
nblock = n_samples // block
lastt = (nblock - 1) * block + 1
# initialize training
if weights is None:
weights = np.identity(n_features, dtype=np.float64)
else:
weights = weights.T
BI = block * np.identity(n_features, dtype=np.float64)
bias = np.zeros((n_features, 1), dtype=np.float64)
onesrow = np.ones((1, block), dtype=np.float64)
startweights = weights.copy()
oldweights = startweights.copy()
step = 0
count_small_angle = 0
wts_blowup = False
blockno = 0
signcount = 0
initial_ext_blocks = ext_blocks # save the initial value in case of reset
# for extended Infomax
if extended:
signs = np.ones(n_features)
for k in range(n_subgauss):
signs[k] = -1
kurt_size = min(kurt_size, n_samples)
old_kurt = np.zeros(n_features, dtype=np.float64)
oldsigns = np.zeros(n_features)
# trainings loop
olddelta, oldchange = 1., 0.
while step < max_iter:
# shuffle data at each step
permute = random_permutation(n_samples, rng)
# ICA training block
# loop across block samples
for t in range(0, lastt, block):
u = np.dot(data[permute[t:t + block], :], weights)
u += np.dot(bias, onesrow).T
if extended:
# extended ICA update
y = np.tanh(u)
weights += l_rate * np.dot(
weights,
BI - signs[None, :] * np.dot(u.T, y) - np.dot(u.T, u))
if use_bias:
bias += l_rate * np.reshape(
np.sum(y, axis=0, dtype=np.float64) * -2.0,
(n_features, 1))
else:
# logistic ICA weights update
y = 1.0 / (1.0 + np.exp(-u))
weights += l_rate * np.dot(weights,
BI + np.dot(u.T, (1.0 - 2.0 * y)))
if use_bias:
bias += l_rate * np.reshape(
np.sum((1.0 - 2.0 * y), axis=0, dtype=np.float64),
(n_features, 1))
# check change limit
max_weight_val = np.max(np.abs(weights))
if max_weight_val > max_weight:
wts_blowup = True
blockno += 1
if wts_blowup:
break
# ICA kurtosis estimation
if extended:
if ext_blocks > 0 and blockno % ext_blocks == 0:
if kurt_size < n_samples:
rp = np.floor(
rng.uniform(0, 1, kurt_size) * (n_samples - 1))
tpartact = np.dot(data[rp.astype(int), :], weights).T
else:
tpartact = np.dot(data, weights).T
# estimate kurtosis
kurt = kurtosis(tpartact, axis=1, fisher=True)
if extmomentum != 0:
kurt = (extmomentum * old_kurt +
(1.0 - extmomentum) * kurt)
old_kurt = kurt
# estimate weighted signs
signs = np.sign(kurt + signsbias)
ndiff = (signs - oldsigns != 0).sum()
if ndiff == 0:
signcount += 1
else:
signcount = 0
oldsigns = signs
if signcount >= signcount_threshold:
ext_blocks = np.fix(ext_blocks * signcount_step)
signcount = 0
# here we continue after the for loop over the ICA training blocks
# if weights in bounds:
if not wts_blowup:
oldwtchange = weights - oldweights
step += 1
angledelta = 0.0
delta = oldwtchange.reshape(1, n_features_square)
change = np.sum(delta * delta, dtype=np.float64)
if step > 2:
angledelta = math.acos(
np.sum(delta * olddelta) / math.sqrt(change * oldchange))
angledelta *= degconst
if verbose:
logger.info(
'step %d - lrate %5f, wchange %8.8f, angledelta %4.1f deg'
% (step, l_rate, change, angledelta))
# anneal learning rate
oldweights = weights.copy()
if angledelta > anneal_deg:
l_rate *= anneal_step # anneal learning rate
# accumulate angledelta until anneal_deg reaches l_rate
olddelta = delta
oldchange = change
count_small_angle = 0 # reset count when angledelta is large
else:
if step == 1: # on first step only
olddelta = delta # initialize
oldchange = change
if n_small_angle is not None:
count_small_angle += 1
if count_small_angle > n_small_angle:
max_iter = step
# apply stopping rule
if step > 2 and change < w_change:
step = max_iter
elif change > blowup:
l_rate *= blowup_fac
# restart if weights blow up (for lowering l_rate)
else:
step = 0 # start again
wts_blowup = 0 # re-initialize variables
blockno = 1
l_rate *= restart_fac # with lower learning rate
weights = startweights.copy()
oldweights = startweights.copy()
olddelta = np.zeros((1, n_features_square), dtype=np.float64)
bias = np.zeros((n_features, 1), dtype=np.float64)
ext_blocks = initial_ext_blocks
# for extended Infomax
if extended:
signs = np.ones(n_features)
for k in range(n_subgauss):
signs[k] = -1
oldsigns = np.zeros(n_features)
if l_rate > min_l_rate:
if verbose:
logger.info('... lowering learning rate to %g'
'\n... re-starting...' % l_rate)
else:
raise ValueError('Error in Infomax ICA: unmixing_matrix matrix'
'might not be invertible!')
# prepare return values
return weights.T
def clean_iter(tim, freq, vis, imageprefix,
ncpu, twidth, doreg, ephemfile, ephem, msinfofile,
outlierfile, field, spw, selectdata,
uvrange, antenna, scan, observation, intent, mode, resmooth,gridmode,
wprojplanes, facets, cfcache, rotpainc, painc, aterm, psterm, mterm, wbawp, conjbeams,
epjtable, interpolation,
niter, gain, threshold, psfmode, imagermode, ftmachine, mosweight,
scaletype, multiscale, negcomponent, smallscalebias,
interactive, mask, nchan, start, width, outframe,
veltype, imsize, cell, phasecenter, restfreq, stokes, weighting,
robust, uvtaper, outertaper, innertaper, modelimage, restoringbeam,
pbcor, minpb, usescratch, noise, npixels, npercycle, cyclefactor,
cyclespeedup, nterms, reffreq, chaniter, flatnoise, allowchunk, btidx):
from taskinit import ms
from taskinit import qa
#from __casac__.quanta import quanta as qa
from __main__ import default, inp
from clean import clean
bt = btidx #0
if bt+twidth < len(tim)-1:
et = btidx+twidth-1
else:
et = len(tim)-1
tim_d = tim/3600./24.-np.fix(tim/3600./24.)
if bt == 0:
bt_d=tim_d[bt]-((tim_d[bt+1]-tim_d[bt])/2)
else:
bt_d=tim_d[bt]-((tim_d[bt]-tim_d[bt-1])/2)
if et == (len(tim)-1) or et == -1:
et_d=tim_d[et]+((tim_d[et]-tim_d[et-1])/2)
else:
et_d=tim_d[et]+((tim_d[et+1]-tim_d[et])/2)
timerange = qa.time(qa.quantity(bt_d,'d'),prec=9)[0] + '~' + \
qa.time(qa.quantity(et_d,'d'),prec=9)[0]
tmid = (bt_d + et_d)/2.
btstr=qa.time(qa.quantity(bt_d,'d'),prec=9,form='fits')[0]
print 'cleaning timerange: ' + timerange
image0=btstr.replace(':','').replace('-','')
imname=imageprefix+image0
if not os.path.exists(imname):
#inp(taskname = 'clean')
clean(vis=vis,imagename=imname,outlierfile=outlierfile,field=field,
spw=spw,selectdata=selectdata,timerange=timerange,uvrange=uvrange,
antenna=antenna,scan=scan, observation=str(observation),intent=intent,
mode=mode, resmooth=resmooth, gridmode=gridmode,
wprojplanes=wprojplanes,facets=facets,cfcache=cfcache,rotpainc=rotpainc, painc=painc,
psterm=psterm,aterm=aterm,mterm=mterm,wbawp=wbawp,conjbeams=conjbeams,
epjtable=epjtable,interpolation=interpolation,niter=niter,
gain=gain,
threshold=threshold,psfmode=psfmode,imagermode=imagermode,
ftmachine=ftmachine,mosweight=mosweight,scaletype=scaletype,
multiscale=multiscale,negcomponent=negcomponent,
smallscalebias=smallscalebias,interactive=interactive,
mask=mask,nchan=nchan,start=start,width=width,outframe=outframe,
veltype=veltype,imsize=imsize,cell=cell,phasecenter=phasecenter,
restfreq=restfreq,stokes=stokes,weighting=weighting,
robust=robust,uvtaper=uvtaper,outertaper=outertaper,
innertaper=innertaper,modelimage=modelimage,
restoringbeam=restoringbeam,pbcor=pbcor,minpb=minpb,
usescratch=usescratch,noise=noise,npixels=npixels,npercycle=npercycle,
cyclefactor=cyclefactor,cyclespeedup=cyclespeedup,nterms=nterms,
reffreq=reffreq,chaniter=chaniter,flatnoise=flatnoise,
allowchunk=False)
clnjunks=['.flux','.mask','.model','.psf','.residual']
for clnjunk in clnjunks:
if os.path.exists(imname+clnjunk):
shutil.rmtree(imname+clnjunk)
if doreg:
# check if ephemfile and msinfofile exist
if not ephem:
print("ephemeris info does not exist!")
return
reftime = [timerange]
helio=vla_prep.ephem_to_helio(msinfo = msinfofile, ephem = ephem, reftime = reftime)
imagefile=[imname+'.image']
fitsfile=[imname+'.fits']
vla_prep.imreg(imagefile = imagefile, fitsfile = fitsfile, helio = helio, toTb = False, scl100 = True)
return
def Find_wav_kurt(x, h, g, h1, h2, h3, nlevel, Sc, Fr, Fs=1, verbose=False):
"""
TODO flesh out this doc-string
J. Antoni : 12/2004
Translation to Python: T. Lecocq 02/2012
:param x: signal
:param h: lowpass filter
:param g: highpass filter
:param h1: filter parameter returned by get_h_parameters
:param h2: filter parameter returned by get_h_parameters
:param h3: filter parameter returned by get_h_parameters
:param nlevel: number of decomposition levels
:param Sc: Sc = -log2(Bw)-1 with Bw the bandwidth of the filter
:param Fr: in the range [0, 0.5]
:param Fs: Sampling frequency of signal x
:param verbose: If ``True`` outputs debugging information
:type x: numpy array
:type h: numpy array
:type g: numpy array
:type h1: numpy array
:type h2: numpy array
:type h3: numpy array
:type nlevel: integer
:type Fr: float
:type: Fs: integer
:returns: c, s, threshold, Bw, fc
"""
level = np.fix((Sc)) + ((Sc % 1) >= 0.5) * (np.log2(3) - 1)
Bw = 2**(-level - 1)
freq_w = np.arange(0, 2**level) / 2**(level + 1) + Bw / 2.
J = np.argmin(np.abs(freq_w - Fr))
fc = freq_w[J]
i = int(np.round(fc / Bw - 1. / 2))
if level % 1 == 0:
acoeff = binary(i, int(level))
bcoeff = []
temp_level = level
else:
i2 = int(np.fix((i / 3.)))
temp_level = np.fix((level)) - 1
acoeff = binary(i2, int(temp_level))
bcoeff = i - i2 * 3
acoeff = acoeff[::-1]
c = K_wpQ_filt(x, h, g, h1, h2, h3, acoeff, bcoeff, temp_level)
t = np.arange(len(x)) / float(Fs)
tc = np.linspace(t[0], t[-1], len(c))
s = np.real(c * np.exp(2j * np.pi * fc * Fs * tc))
sig = np.median(np.abs(c)) / np.sqrt(np.pi / 2.)
threshold = sig * raylinv(np.array([
.999,
]), np.array([
1,
]))
return c, s, threshold, Bw, fc
def LinearRegression_KFold(Subjects_Data, Subjects_Score, Fold_Quantity,
ResultantFolder):
if not os.path.exists(ResultantFolder):
os.mkdir(ResultantFolder)
Subjects_Quantity = len(Subjects_Score)
# Sort the subjects score
Sorted_Index = np.argsort(Subjects_Score)
Subjects_Data = Subjects_Data[Sorted_Index, :]
Subjects_Score = Subjects_Score[Sorted_Index]
EachFold_Size = np.int(np.fix(np.divide(Subjects_Quantity, Fold_Quantity)))
MaxSize = EachFold_Size * Fold_Quantity
EachFold_Max = np.ones(Fold_Quantity, np.int) * MaxSize
tmp = np.arange(Fold_Quantity - 1, -1, -1)
EachFold_Max = EachFold_Max - tmp
Remain = np.mod(Subjects_Quantity, Fold_Quantity)
for j in np.arange(Remain):
EachFold_Max[j] = EachFold_Max[j] + Fold_Quantity
Fold_Corr = []
Fold_MAE = []
Fold_Weight = []
for j in np.arange(Fold_Quantity):
Fold_J_Index = np.arange(j, EachFold_Max[j], Fold_Quantity)
Subjects_Data_test = Subjects_Data[Fold_J_Index, :]
Subjects_Score_test = Subjects_Score[Fold_J_Index]
Subjects_Data_train = np.delete(Subjects_Data, Fold_J_Index, axis=0)
Subjects_Score_train = np.delete(Subjects_Score, Fold_J_Index)
normalize = preprocessing.MinMaxScaler()
Subjects_Data_train = normalize.fit_transform(Subjects_Data_train)
Subjects_Data_test = normalize.transform(Subjects_Data_test)
clf = linear_model.LinearRegression()
clf.fit(Subjects_Data_train, Subjects_Score_train)
Fold_J_Score = clf.predict(Subjects_Data_test)
Fold_J_Corr = np.corrcoef(Fold_J_Score, Subjects_Score_test)
Fold_J_Corr = Fold_J_Corr[0, 1]
Fold_Corr.append(Fold_J_Corr)
Fold_J_MAE = np.mean(
np.abs(np.subtract(Fold_J_Score, Subjects_Score_test)))
Fold_MAE.append(Fold_J_MAE)
Fold_Weight.append(clf.coef_)
Fold_J_result = {
'Index': Fold_J_Index,
'Test_Score': Subjects_Score_test,
'Predict_Score': Fold_J_Score,
'Weight': clf.coef_,
'Corr': Fold_J_Corr,
'MAE': Fold_J_MAE
}
Fold_J_FileName = 'Fold_' + str(j) + '_Score.mat'
ResultantFile = os.path.join(ResultantFolder, Fold_J_FileName)
sio.savemat(ResultantFile, Fold_J_result)
Fold_Corr = [0 if np.isnan(x) else x for x in Fold_Corr]
Mean_Corr = np.mean(Fold_Corr)
Mean_MAE = np.mean(Fold_MAE)
Weight_Sum = np.transpose([0] * len(clf.coef_))
Frequency = np.transpose([0] * len(clf.coef_))
for j in np.arange(Fold_Quantity):
mask = np.transpose([int(tmp > 0) for tmp in Fold_Weight[j]])
Frequency = Frequency + mask
Weight_Sum = Weight_Sum + Fold_Weight[j]
Weight_Average = np.divide(Weight_Sum, Frequency)
Weight_Average = np.nan_to_num(Weight_Average)
Res_NFold = {
'Mean_Corr': Mean_Corr,
'Mean_MAE': Mean_MAE,
'Weight_Avg': Weight_Average,
'Frequency': Frequency
}
ResultantFile = os.path.join(ResultantFolder, 'Res_NFold.mat')
sio.savemat(ResultantFile, Res_NFold)
return
def coldfilt(X, ha, hb):
"""Filter the columns of image X using the two filters ha and hb =
reverse(ha). ha operates on the odd samples of X and hb on the even
samples. Both filters should be even length, and h should be approx linear
phase with a quarter sample advance from its mid pt (i.e. :math:`|h(m/2)| >
|h(m/2 + 1)|`).
.. code-block:: text
ext top edge bottom edge ext
Level 1: ! | ! | !
odd filt on . b b b b a a a a a a a a b b b b
odd filt on . a a a a b b b b b b b b a a a a
Level 2: ! | ! | !
+q filt on x b b a a a a b b
-q filt on o a a b b b b a a
The output is decimated by two from the input sample rate and the results
from the two filters, Ya and Yb, are interleaved to give Y. Symmetric
extension with repeated end samples is used on the composite X columns
before each filter is applied.
Raises ValueError if the number of rows in X is not a multiple of 4, the
length of ha does not match hb or the lengths of ha or hb are non-even.
.. codeauthor:: Rich Wareham <*****@*****.**>, August 2013
.. codeauthor:: Cian Shaffrey, Cambridge University, August 2000
.. codeauthor:: Nick Kingsbury, Cambridge University, August 2000
"""
# Make sure all inputs are arrays
X = asfarray(X)
ha = asfarray(ha)
hb = asfarray(hb)
r, c = X.shape
if r % 4 != 0:
raise ValueError('No. of rows in X must be a multiple of 4')
if ha.shape != hb.shape:
raise ValueError('Shapes of ha and hb must be the same')
if ha.shape[0] % 2 != 0:
raise ValueError('Lengths of ha and hb must be even')
m = ha.shape[0]
m2 = np.fix(m * 0.5)
# Set up vector for symmetric extension of X with repeated end samples.
xe = reflect(np.arange(-m, r + m), -0.5, r - 0.5)
# Select odd and even samples from ha and hb. Note that due to 0-indexing
# 'odd' and 'even' are not perhaps what you might expect them to be.
hao = as_column_vector(ha[0:m:2])
hae = as_column_vector(ha[1:m:2])
hbo = as_column_vector(hb[0:m:2])
hbe = as_column_vector(hb[1:m:2])
t = np.arange(5, r + 2 * m - 2, 4)
r2 = r // 2
Y = np.zeros((r2, c), dtype=X.dtype)
if np.sum(ha * hb) > 0:
s1 = slice(0, r2, 2)
s2 = slice(1, r2, 2)
else:
s2 = slice(0, r2, 2)
s1 = slice(1, r2, 2)
# Perform filtering on columns of extended matrix X(xe,:) in 4 ways.
Y[s1, :] = _column_convolve(X[xe[t - 1], :], hao) + _column_convolve(
X[xe[t - 3], :], hae)
Y[s2, :] = _column_convolve(X[xe[t], :], hbo) + _column_convolve(
X[xe[t - 2], :], hbe)
return Y
def detect_face(img, minsize, PNet, RNet, ONet, threshold, fastresize, factor):
img2 = img.copy()
factor_count = 0
total_boxes = np.zeros((0, 9), np.float)
points = []
h = img.shape[0]
w = img.shape[1]
minl = min(h, w)
img = img.astype(float)
m = 12.0 / minsize
minl = minl * m
#total_boxes = np.load('total_boxes.npy')
#total_boxes = np.load('total_boxes_242.npy')
#total_boxes = np.load('total_boxes_101.npy')
# create scale pyramid
scales = []
while minl >= 12:
scales.append(m * pow(factor, factor_count))
minl *= factor
factor_count += 1
# first stage
for scale in scales:
hs = int(np.ceil(h * scale))
ws = int(np.ceil(w * scale))
if fastresize:
im_data = (img - 127.5) * 0.0078125 # [0,255] -> [-1,1]
im_data = cv2.resize(im_data, (ws, hs)) # default is bilinear
else:
im_data = cv2.resize(img, (ws, hs)) # default is bilinear
im_data = (im_data - 127.5) * 0.0078125 # [0,255] -> [-1,1]
#im_data = imResample(img, hs, ws); print "scale:", scale
im_data = np.swapaxes(im_data, 0, 2)
im_data = np.array([im_data], dtype=np.float)
PNet.blobs['data'].reshape(1, 3, ws, hs)
PNet.blobs['data'].data[...] = im_data
out = PNet.forward()
boxes = generateBoundingBox(out['prob1'][0, 1, :, :],
out['conv4-2'][0], scale, threshold[0])
if boxes.shape[0] != 0:
#print boxes[4:9]
#print 'im_data', im_data[0:5, 0:5, 0], '\n'
#print 'prob1', out['prob1'][0,0,0:3,0:3]
pick = nms(boxes, 0.5, 'Union')
if len(pick) > 0:
boxes = boxes[pick, :]
if boxes.shape[0] != 0:
total_boxes = np.concatenate((total_boxes, boxes), axis=0)
#np.save('total_boxes_101.npy', total_boxes)
#####
# 1 #
#####
print("Pnet boxes:", total_boxes.shape[0])
#print total_boxes
#return total_boxes, []
numbox = total_boxes.shape[0]
if numbox > 0:
# nms
pick = nms(total_boxes, 0.7, 'Union')
total_boxes = total_boxes[pick, :]
#print("[2]:",total_boxes.shape[0])
# revise and convert to square
regh = total_boxes[:, 3] - total_boxes[:, 1]
regw = total_boxes[:, 2] - total_boxes[:, 0]
t1 = total_boxes[:, 0] + total_boxes[:, 5] * regw
t2 = total_boxes[:, 1] + total_boxes[:, 6] * regh
t3 = total_boxes[:, 2] + total_boxes[:, 7] * regw
t4 = total_boxes[:, 3] + total_boxes[:, 8] * regh
t5 = total_boxes[:, 4]
total_boxes = np.array([t1, t2, t3, t4, t5]).T
#print "[3]:",total_boxes.shape[0]
#print regh
#print regw
#print 't1',t1
#print total_boxes
total_boxes = rerec(total_boxes) # convert box to square
#print("[4]:",total_boxes.shape[0])
total_boxes[:, 0:4] = np.fix(total_boxes[:, 0:4])
#print("[4.5]:",total_boxes.shape[0])
#print total_boxes
[dy, edy, dx, edx, y, ey, x, ex, tmpw, tmph] = pad(total_boxes, w, h)
#print total_boxes.shape
#print total_boxes
numbox = total_boxes.shape[0]
if numbox > 0:
# second stage
#print 'tmph', tmph
#print 'tmpw', tmpw
#print "y,ey,x,ex", y, ey, x, ex,
#print "edy", edy
#tempimg = np.load('tempimg.npy')
# construct input for RNet
tempimg = np.zeros((numbox, 24, 24, 3)) # (24, 24, 3, numbox)
for k in range(numbox):
tmp = np.zeros((int(tmph[k]), int(tmpw[k]), 3))
#print "dx[k], edx[k]:", dx[k], edx[k]
#print "dy[k], edy[k]:", dy[k], edy[k]
#print "img.shape", img[y[k]:ey[k]+1, x[k]:ex[k]+1].shape
#print "tmp.shape", tmp[dy[k]:edy[k]+1, dx[k]:edx[k]+1].shape
tmp[int(dy[k]):int(edy[k] + 1),
int(dx[k]):int(edx[k] + 1)] = img[int(y[k]):int(ey[k] + 1),
int(x[k]):int(ex[k] + 1)]
#print "y,ey,x,ex", y[k], ey[k], x[k], ex[k]
#print "tmp", tmp.shape
tempimg[k, :, :, :] = cv2.resize(tmp, (24, 24))
#tempimg[k,:,:,:] = imResample(tmp, 24, 24)
#print 'tempimg', tempimg[k,:,:,:].shape
#print tempimg[k,0:5,0:5,0]
#print tempimg[k,0:5,0:5,1]
#print tempimg[k,0:5,0:5,2]
#print k
#print tempimg.shape
#print tempimg[0,0,0,:]
tempimg = (
tempimg -
127.5) * 0.0078125 # done in imResample function wrapped by python
#np.save('tempimg.npy', tempimg)
# RNet
tempimg = np.swapaxes(tempimg, 1, 3)
#print tempimg[0,:,0,0]
RNet.blobs['data'].reshape(numbox, 3, 24, 24)
RNet.blobs['data'].data[...] = tempimg
out = RNet.forward()
#print out['conv5-2'].shape
#print out['prob1'].shape
score = out['prob1'][:, 1]
#print 'score', score
pass_t = np.where(score > threshold[1])[0]
#print 'pass_t', pass_t
score = np.array([score[pass_t]]).T
total_boxes = np.concatenate((total_boxes[pass_t, 0:4], score), axis=1)
#print("[5]:",total_boxes.shape[0])
#print total_boxes
#print "1.5:",total_boxes.shape
mv = out['conv5-2'][pass_t, :].T
#print "mv", mv
if total_boxes.shape[0] > 0:
pick = nms(total_boxes, 0.7, 'Union')
#print 'pick', pick
if len(pick) > 0:
total_boxes = total_boxes[pick, :]
#print("[6]:",total_boxes.shape[0])
total_boxes = bbreg(total_boxes, mv[:, pick])
#print("[7]:",total_boxes.shape[0])
total_boxes = rerec(total_boxes)
#print("[8]:",total_boxes.shape[0])
#####
# 2 #
#####
#print("2:",total_boxes.shape)
numbox = total_boxes.shape[0]
if numbox > 0:
# third stage
total_boxes = np.fix(total_boxes)
[dy, edy, dx, edx, y, ey, x, ex, tmpw,
tmph] = pad(total_boxes, w, h)
#print 'tmpw', tmpw
#print 'tmph', tmph
#print 'y ', y
#print 'ey', ey
#print 'x ', x
#print 'ex', ex
tempimg = np.zeros((numbox, 48, 48, 3))
for k in range(numbox):
tmp = np.zeros((int(tmph[k]), int(tmpw[k]), 3))
tmp[int(dy[k]):int(edy[k] + 1),
int(dx[k]):int(edx[k] + 1)] = img[int(y[k]):int(ey[k] + 1),
int(x[k]):int(ex[k] + 1)]
tempimg[k, :, :, :] = cv2.resize(tmp, (48, 48))
tempimg = (tempimg - 127.5) * 0.0078125 # [0,255] -> [-1,1]
# ONet
tempimg = np.swapaxes(tempimg, 1, 3)
ONet.blobs['data'].reshape(numbox, 3, 48, 48)
ONet.blobs['data'].data[...] = tempimg
out = ONet.forward()
score = out['prob1'][:, 1]
points = out['conv6-3']
pass_t = np.where(score > threshold[2])[0]
points = points[pass_t, :]
score = np.array([score[pass_t]]).T
total_boxes = np.concatenate((total_boxes[pass_t, 0:4], score),
axis=1)
#print("[9]:",total_boxes.shape[0])
mv = out['conv6-2'][pass_t, :].T
w = total_boxes[:, 3] - total_boxes[:, 1] + 1
h = total_boxes[:, 2] - total_boxes[:, 0] + 1
points[:, 0:5] = np.tile(w, (5, 1)).T * points[:, 0:5] + np.tile(
total_boxes[:, 0], (5, 1)).T - 1
points[:, 5:10] = np.tile(h, (5, 1)).T * points[:, 5:10] + np.tile(
total_boxes[:, 1], (5, 1)).T - 1
if total_boxes.shape[0] > 0:
total_boxes = bbreg(total_boxes, mv[:, :])
#print("[10]:",total_boxes.shape[0])
pick = nms(total_boxes, 0.7, 'Min')
#print pick
if len(pick) > 0:
total_boxes = total_boxes[pick, :]
#print("[11]:",total_boxes.shape[0])
points = points[pick, :]
#####
# 3 #
#####
#print("3:",total_boxes.shape)
return total_boxes, points
def detect_face(img, minsize, pnet, rnet, onet, threshold, factor):
# im: input image
# minsize: minimum of faces' size
# pnet, rnet, onet: caffemodel
# threshold: threshold=[th1 th2 th3], th1-3 are three steps's threshold
# fastresize: resize img from last scale (using in high-resolution images) if fastresize==true
factor_count = 0
total_boxes = np.empty((0, 9))
points = np.empty(0)
h = img.shape[0]
w = img.shape[1]
minl = np.amin([h, w])
m = 12.0 / minsize
minl = minl * m
#print('... factor_count ',factor_count,' | total_boxes ',total_boxes,' | points ',points,' \n... h ',h,' w ',w,' | minl ',minl,' m ',m)
# creat scale pyramid
scales = []
while minl >= 12:
scales += [m * np.power(factor, factor_count)]
minl = minl * factor
factor_count += 1
#print('minl ',minl,' | factor_count ',factor_count)
# print('scales : ',scales, ' | factor_count : ',factor_count)
# first stage
for j in range(len(scales)):
scale = scales[j]
hs = int(np.ceil(h * scale))
ws = int(np.ceil(w * scale))
im_data = imresample(img, (hs, ws))
im_data = (im_data - 127.5) * 0.0078125
img_x = np.expand_dims(im_data, 0)
img_y = np.transpose(img_x, (0, 2, 1, 3))
out = pnet(img_y)
out0 = np.transpose(out[0], (0, 2, 1, 3))
out1 = np.transpose(out[1], (0, 2, 1, 3))
boxes, _ = generateBoundingBox(out1[0, :, :,
1].copy(), out0[0, :, :, :].copy(),
scale, threshold[0])
#print('scale ',scale, ' | out0 ',out1,' | out1',out1,' | boxes ',boxes)
#print('scale ',"%1.6f" %scale,' | boxes ',len(boxes),end='')
# inter-scale nms
pick = nms(boxes.copy(), 0.5, 'Union')
#print(pick)
if boxes.size > 0 and pick.size > 0:
boxes = boxes[pick, :]
total_boxes = np.append(total_boxes, boxes, axis=0)
#print(' | boxes after nms : ',len(boxes), end='')
# print()
numbox = total_boxes.shape[0]
# print('after pnet numbox ',numbox)
if numbox > 0:
pick = nms(total_boxes.copy(), 0.7, 'Union')
total_boxes = total_boxes[pick, :]
regw = total_boxes[:, 2] - total_boxes[:, 0]
regh = total_boxes[:, 3] - total_boxes[:, 1]
qq1 = total_boxes[:, 0] + total_boxes[:, 5] * regw
qq2 = total_boxes[:, 1] + total_boxes[:, 6] * regh
qq3 = total_boxes[:, 2] + total_boxes[:, 7] * regw
qq4 = total_boxes[:, 3] + total_boxes[:, 8] * regh
total_boxes = np.transpose(
np.vstack([qq1, qq2, qq3, qq4, total_boxes[:, 4]]))
total_boxes = rerec(total_boxes.copy())
total_boxes[:, 0:4] = np.fix(total_boxes[:, 0:4]).astype(np.int32)
dy, edy, dx, edx, y, ey, x, ex, tmpw, tmph = pad(
total_boxes.copy(), w, h)
if numbox > 0:
# second stage
tempimg = np.zeros((24, 24, 3, numbox))
for k in range(0, numbox):
tmp = np.zeros((int(tmph[k]), int(tmpw[k]), 3))
tmp[dy[k] - 1:edy[k], dx[k] - 1:edx[k], :] = img[y[k] - 1:ey[k],
x[k] - 1:ex[k], :]
if tmp.shape[0] > 0 and tmp.shape[1] > 0 or tmp.shape[
0] == 0 and tmp.shape[1] == 0:
tempimg[:, :, :, k] = imresample(tmp, (24, 24))
else:
return np.empty()
tempimg = (tempimg - 127.5) * 0.0078125
tempimg1 = np.transpose(tempimg, (3, 1, 0, 2))
out = rnet(tempimg1)
out0 = np.transpose(out[0])
out1 = np.transpose(out[1])
score = out1[1, :]
ipass = np.where(score > threshold[1])
total_boxes = np.hstack([
total_boxes[ipass[0], 0:4].copy(),
np.expand_dims(score[ipass].copy(), 1)
])
mv = out0[:, ipass[0]]
if total_boxes.shape[0] > 0:
pick = nms(total_boxes, 0.7, 'Union')
total_boxes = total_boxes[pick, :]
total_boxes = bbreg(total_boxes.copy(), np.transpose(mv[:, pick]))
total_boxes = rerec(total_boxes.copy())
numbox = total_boxes.shape[0]
# print('after rnet numbox ',numbox)
if numbox > 0:
# third stage
total_boxes = np.fix(total_boxes).astype(np.int32)
dy, edy, dx, edx, y, ey, x, ex, tmpw, tmph = pad(
total_boxes.copy(), w, h)
tempimg = np.zeros((48, 48, 3, numbox))
for k in range(0, numbox):
tmp = np.zeros((int(tmph[k]), int(tmpw[k]), 3))
tmp[dy[k] - 1:edy[k], dx[k] - 1:edx[k], :] = img[y[k] - 1:ey[k],
x[k] - 1:ex[k], :]
if tmp.shape[0] > 0 and tmp.shape[1] > 0 or tmp.shape[
0] == 0 and tmp.shape[1] == 0:
tempimg[:, :, :, k] = imresample(tmp, (48, 48))
else:
return np.empty()
tempimg = (tempimg - 127.5) * 0.0078125
tempimg1 = np.transpose(tempimg, (3, 1, 0, 2))
out = onet(tempimg1)
out0 = np.transpose(out[0])
out1 = np.transpose(out[1])
out2 = np.transpose(out[2])
score = out2[1, :]
points = out1
ipass = np.where(score > threshold[2])
points = points[:, ipass[0]]
total_boxes = np.hstack([
total_boxes[ipass[0], 0:4].copy(),
np.expand_dims(score[ipass].copy(), 1)
])
mv = out0[:, ipass[0]]
w = total_boxes[:, 2] - total_boxes[:, 0] + 1
h = total_boxes[:, 3] - total_boxes[:, 1] + 1
points[0:5, :] = np.tile(w, (5, 1)) * points[0:5, :] + np.tile(
total_boxes[:, 0], (5, 1)) - 1
points[5:10, :] = np.tile(h, (5, 1)) * points[5:10, :] + np.tile(
total_boxes[:, 1], (5, 1)) - 1
if total_boxes.shape[0] > 0:
total_boxes = bbreg(total_boxes.copy(), np.transpose(mv))
pick = nms(total_boxes.copy(), 0.7, 'Min')
total_boxes = total_boxes[pick, :]
points = points[:, pick]
numbox = total_boxes.shape[0]
# print('after pnet numbox ',numbox)
return total_boxes, points
def _downsample(
image: np.ndarray,
ds_matrix: np.ndarray,
) -> np.ndarray:
"""Downsamples an image based on a given downsampling matrix.
**This function should seldom ever be used. Instead, one should often
use :func:`resample`. The :func:`resample` function can do everything
that this function can do and more. This function is faster than the
:func:`resample` function for downsampling without interpolation.**
Downsamples an image by the given downsampling matrix argument,
ds_matrix. For an input domain vector **mn** = [**m**, **n**] and an input
image **f** (**mn**), the output image **g** (**.**) is defined by **g**
(**mn**) = **f** (**M** @ **mn**) where **M** is the downsampling matrix
ds_matrix.
:type image: ``numpy.ndarray``
:param image: An image to be downsampled.
:type ds_matrix: ``numpy.ndarray`` (dtype must be integer)
:param ds_matrix: The downsampling matrix **M** to be used.
:rtype: ``numpy.ndarray``
:return: The downsampled image
Examples:
>>> image = np.array([[ 0, 1, 2, 3, 4, 5, 6, 7],
... [10, 11, 12, 13, 14, 15, 16, 17],
... [20, 21, 22, 23, 24, 25, 26, 27],
... [30, 31, 32, 33, 34, 35, 36, 37],
... [40, 41, 42, 43, 44, 45, 46, 47],
... [50, 51, 52, 53, 54, 55, 56, 57],
... [60, 61, 62, 63, 64, 65, 66, 67],
... [70, 71, 72, 73, 74, 75, 76, 77]])
>>> M = np.array([[2, 0], [0, 2]])
>>> downsampled_image = downsample(image, M)
>>> downsampled_image
array([[ 0., 2., 4., 6.],
[20., 22., 24., 26.],
[40., 42., 44., 46.],
[60., 62., 64., 66.]])
>>> M2 = np.array([[1, 2], [2, 1]])
>>> downsample(downsampled_image, M2)
array([[ 0., 0., 0., 60.],
[ 0., 0., 42., 0.],
[ 0., 24., 66., 0.],
[ 6., 0., 0., 0.]])
"""
assert (2, 2) == ds_matrix.shape, "Argument 'ds_matrix' must be an " \
"ndarray with shape (2, 2)"
assert np.issubdtype(ds_matrix.dtype, np.integer), "Argument " \
"'ds_matrix' must be an ndarray with an integer dtype"
ds_matrix_det = ds_matrix[0, 0] * ds_matrix[1, 1] \
- ds_matrix[0, 1] * ds_matrix[1, 0]
assert 0 != ds_matrix_det, "Argument 'ds_matrix' must be nonsingular"
height = image.shape[0]
width = image.shape[1]
ds_matrix_inv_scaled = np.array([[ds_matrix[1, 1], -ds_matrix[0, 1]],
[-ds_matrix[1, 0], ds_matrix[0, 0]]])
kl_extrema = np.array(np.meshgrid([0, height - 1],
[0, width - 1])).reshape(2, -1)
mn_extrema = (1 / ds_matrix_det) * (ds_matrix_inv_scaled @ kl_extrema)
m_min = np.min(mn_extrema[0])
m_max = np.max(mn_extrema[0])
n_min = np.min(mn_extrema[1])
n_max = np.max(mn_extrema[1])
kl = np.array(np.meshgrid(np.arange(0, height),
np.arange(0, width))).reshape(2, -1)
mn = ds_matrix_inv_scaled @ kl
mn_lattice_indices = np.all(0 == mn % ds_matrix_det, axis=0)
mn = ((1 / ds_matrix_det) * mn[:, mn_lattice_indices]).astype(int)
kl = kl[:, mn_lattice_indices]
ds_image = np.zeros((np.floor(m_max - m_min + 1).astype(int),
np.floor(n_max - n_min + 1).astype(int)))
mn_offset = np.fix(np.array([[m_min], [n_min]])).astype(int)
ds_image[tuple(mn - mn_offset)] = image[tuple(kl)]
return ds_image
def detect_face(img, minsize, pnet, rnet, onet, threshold, factor):
# return : boundings and landmarks
# im: input image
# minsize: minimum of faces' size
# pnet, rnet, onet: caffemodel
# threshold: threshold=[th1 th2 th3], th1-3 are three steps's threshold
# fastresize: resize img from last scale (using in high-resolution images) if fastresize==true
factor_count = 0
total_boxes = np.empty((0, 9))
points = []
h = img.shape[0]
w = img.shape[1]
minl = np.amin([h, w])
m = 12.0 / minsize
minl = minl * m
# creat scale pyramid
scales = []
while minl >= 12:
scales += [m * np.power(factor, factor_count)]
minl = minl * factor
factor_count += 1
# first stage
for j in range(len(scales)):
scale = scales[j]
hs = int(np.ceil(h * scale))
ws = int(np.ceil(w * scale))
im_data = imresample(img, (hs, ws))
im_data = (im_data - 127.5) * 0.0078125 # normalize
#print("im_data.shape = ", im_data.shape)
img_x = np.expand_dims(im_data, 0)
#print("img_x.shape = ", img_x.shape)
img_y = np.transpose(img_x, (0, 2, 1, 3))
#print("img_y.shape = ", img_y.shape)
out = pnet(img_y)
#print("out[0].shape = ", out[0].shape)
#print("out[1].shape = ", out[1].shape)
out0 = np.transpose(out[0],
(0, 2, 1, 3)) #out[0].shape = (1, 40, 24, 4)
out1 = np.transpose(out[1],
(0, 2, 1, 3)) #out[0].shape = (1, 40, 24, 2)
# def generateBoundingBox(imap, reg, scale, t):
boxes, _ = generateBoundingBox(out1[0,:,:,1].copy(), out0[0,:,:,:].copy(), scale, \
threshold[0])
# inter-scale nms
pick = nms(boxes.copy(), 0.5, 'Union')
if boxes.size > 0 and pick.size > 0:
boxes = boxes[pick, :]
total_boxes = np.append(total_boxes, boxes, axis=0)
numbox = total_boxes.shape[0]
if numbox > 0:
pick = nms(total_boxes.copy(), 0.7, 'Union')
total_boxes = total_boxes[pick, :]
regw = total_boxes[:, 2] - total_boxes[:, 0]
regh = total_boxes[:, 3] - total_boxes[:, 1]
qq1 = total_boxes[:, 0] + total_boxes[:, 5] * regw
qq2 = total_boxes[:, 1] + total_boxes[:, 6] * regh
qq3 = total_boxes[:, 2] + total_boxes[:, 7] * regw
qq4 = total_boxes[:, 3] + total_boxes[:, 8] * regh
total_boxes = np.transpose(
np.vstack([qq1, qq2, qq3, qq4, total_boxes[:, 4]]))
total_boxes = rerec(total_boxes.copy())
total_boxes[:, 0:4] = np.fix(total_boxes[:, 0:4]).astype(np.int32)
# 现在total_boxes经过校正且square
dy, edy, dx, edx, y, ey, x, ex, tmpw, tmph = pad(
total_boxes.copy(), w, h)
# （y, x）(ey, ex) 是原图box的左上和右下坐标
# （dy，dx） （edy， edx） ： （（1， 1） 到（边长， 边长）
# tmpw == tmph 是原图box的边长
numbox = total_boxes.shape[0]
if numbox > 0:
# second stage
tempimg = np.zeros((24, 24, 3, numbox))
for k in range(0, numbox):
tmp = np.zeros((int(tmph[k]), int(tmpw[k]), 3))
# copy img to temp pixel-wise
tmp[dy[k] - 1:edy[k], dx[k] - 1:edx[k], :] = img[y[k] - 1:ey[k],
x[k] - 1:ex[k], :]
if tmp.shape[0] > 0 and tmp.shape[1] > 0 or tmp.shape[
0] == 0 and tmp.shape[1] == 0:
#print("tmp.shape = ", tmp.shape)
tempimg[:, :, :, k] = imresample(tmp, (24, 24))
#print("tempimg.shape : ",tempimg.shape)
else:
return np.empty()
tempimg = (tempimg - 127.5) * 0.0078125
tempimg1 = np.transpose(tempimg, (3, 1, 0, 2))
out = rnet(tempimg1)
out0 = np.transpose(out[0])
out1 = np.transpose(out[1])
score = out1[1, :]
ipass = np.where(score > threshold[1])
total_boxes = np.hstack([
total_boxes[ipass[0], 0:4].copy(),
np.expand_dims(score[ipass].copy(), 1)
])
mv = out0[:, ipass[0]]
if total_boxes.shape[0] > 0:
pick = nms(total_boxes, 0.7, 'Union')
total_boxes = total_boxes[pick, :]
total_boxes = bbreg(total_boxes.copy(), np.transpose(mv[:, pick]))
total_boxes = rerec(total_boxes.copy())
numbox = total_boxes.shape[0]
if numbox > 0:
# third stage
total_boxes = np.fix(total_boxes).astype(np.int32)
dy, edy, dx, edx, y, ey, x, ex, tmpw, tmph = pad(
total_boxes.copy(), w, h)
tempimg = np.zeros((48, 48, 3, numbox))
for k in range(0, numbox):
tmp = np.zeros((int(tmph[k]), int(tmpw[k]), 3))
tmp[dy[k] - 1:edy[k], dx[k] - 1:edx[k], :] = img[y[k] - 1:ey[k],
x[k] - 1:ex[k], :]
if tmp.shape[0] > 0 and tmp.shape[1] > 0 or tmp.shape[
0] == 0 and tmp.shape[1] == 0:
tempimg[:, :, :, k] = imresample(tmp, (48, 48))
else:
return np.empty()
tempimg = (tempimg - 127.5) * 0.0078125
tempimg1 = np.transpose(tempimg, (3, 1, 0, 2))
out = onet(tempimg1)
out0 = np.transpose(out[0])
out1 = np.transpose(out[1])
out2 = np.transpose(out[2])
# print("out.shape : ")
# print(out0.shape)#(4, 4)
# print(out1.shape)#(10, 4)
# print(out2.shape)#(2, 4)
score = out2[1, :] #(1, 4)
# print(score)
points = out1
ipass = np.where(score > threshold[2])
points = points[:, ipass[0]] # select convinced points(landmarks)
#print("total_boxes.shape : ",total_boxes.shape)
total_boxes = np.hstack([
total_boxes[ipass[0], 0:4].copy(),
np.expand_dims(score[ipass].copy(), 1)
])
#print("total_boxes.shape : ",total_boxes.shape)
# now total_box.shape is (4, 5) 绝对位置
mv = out0[:, ipass[0]] # 相对位置
w = total_boxes[:, 2] - total_boxes[:, 0] + 1
h = total_boxes[:, 3] - total_boxes[:, 1] + 1
# print("w.shape = ", w.shape)
# print(total_boxes[:,2])
# print(w)
# print("np.tile(w,(5, 1)) = ", np.tile(w,(5, 1)).shape)
points[0:5, :] = np.tile(w, (5, 1)) * points[0:5, :] + np.tile(
total_boxes[:, 0], (5, 1)) - 1
points[5:10, :] = np.tile(h, (5, 1)) * points[5:10, :] + np.tile(
total_boxes[:, 1], (5, 1)) - 1
if total_boxes.shape[0] > 0:
total_boxes = bbreg(total_boxes.copy(), np.transpose(mv))
pick = nms(total_boxes.copy(), 0.7, 'Min')
total_boxes = total_boxes[pick, :]
points = points[:, pick]
return total_boxes, points
def generateBoundingBox(imap, reg, scale, t):
"""Use heatmap to generate bounding boxes"""
stride = 2
cellsize = 12
# 获取x1,y1,x2,y2的坐标
print("进入generate")
#print(imap.shape)
imap = np.transpose(imap)
print(imap.shape)
#print(type(imap))
dx1 = np.transpose(reg[:, :, 0])
dy1 = np.transpose(reg[:, :, 1])
dx2 = np.transpose(reg[:, :, 2])
dy2 = np.transpose(reg[:, :, 3])
print("进入reg")
#print(reg[:, :, 0].shape)
print(dx1)
print(dy1)
print(dx2)
print(dy2)
# 获取可信度大于阈值的人脸框的坐标
print(imap)
y, x = np.where(imap >= t)
print(y)
print(x)
#print(type(y))
#print(y.shape)
#print(y.shape[0])
# 只有一个符合的情况
if y.shape[0] == 1:
#print("进入if判断")
dx1 = np.flipud(dx1) #翻转矩阵
dy1 = np.flipud(dy1)
dx2 = np.flipud(dx2)
dy2 = np.flipud(dy2)
# 筛选出符合条件的框
print("_____________")
# a= imap[(y,x)]
# print(a)
score = imap[(y, x)]
print(score)
print("_____________")
#print(dx1[(y, x)].shape)
print([dx1[(y, x)], dy1[(y, x)], dx2[(y, x)], dy2[(y, x)]])
print((np.vstack([dx1[(y, x)], dy1[(y, x)], dx2[(y, x)],
dy2[(y, x)]])).shape)
print("_____________")
reg = np.transpose(
np.vstack([dx1[(y, x)], dy1[(y, x)], dx2[(y, x)], dy2[(y, x)]]))
print(reg.shape)
if reg.size == 0:
#print("进入if")
reg = np.empty((0, 3))
# 还原尺度
print("_____________")
#print(np.vstack([y,x]))
bb = np.transpose(np.vstack([y, x]))
print(bb)
print('进入计算部分')
#print(stride * bb)
print(scale)
# #print((stride * bb + 1))
#print((stride * bb + 1) / scale)
q1 = np.fix((stride * bb + 1) / scale)
q2 = np.fix((stride * bb + cellsize - 1 + 1) / scale)
print(q1)
print(q2)
# shape(None, 9)
#print(np.expand_dims(score, 0))
#print(np.expand_dims(score, 1))
boundingbox = np.hstack([q1, q2, np.expand_dims(score, 1), reg])
#print(boundingbox)
return boundingbox, reg
Output basename = %s\n\
Start time = %s\n\
End time = %s\n' % (options.data_file, options.output_file,
options.starttime, options.endtime))
# read waveform between time limits
wf = Waveform()
wf.read_from_file(options.data_file, starttime=tdeb, endtime=tfin)
dt = wf.delta
x = wf.values
print(wf.stream)
# set up parameters for kurtogram analysis
N = len(x)
N2 = np.log2(N) - 7
nlevel = int(np.fix(N2))
c, flower, fupper = Fast_Kurtogram(x,
nlevel,
options.verbose,
Fs=1 / dt,
opt2=1)
logging.info("Frequency band for best kurtogram : %.2f Hz - %.2f Hz" %
(flower, fupper))
filt_name = "filt_%s" % options.output_file
kurt_name = "kurt_%s" % options.output_file
wf.bp_filter(flower, fupper, rmean=True, taper=True)
wf.write_to_file_filled(filt_name, format='MSEED')
wf.process_kurtosis(100 * dt, recursive=True, post_taper=True)
wf.write_to_file_filled(kurt_name, format='MSEED')
def ptclean(vis, imageprefix, ncpu, twidth, doreg, ephemfile, msinfofile,
outlierfile, field, spw, selectdata, timerange,
uvrange, antenna, scan, observation, intent, mode, resmooth,gridmode,
wprojplanes, facets, cfcache, rotpainc, painc, aterm, psterm, mterm, wbawp, conjbeams,
epjtable, interpolation,
niter, gain, threshold, psfmode, imagermode, ftmachine, mosweight,
scaletype, multiscale, negcomponent, smallscalebias,
interactive, mask, nchan, start, width, outframe,
veltype, imsize, cell, phasecenter, restfreq, stokes, weighting,
robust, uvtaper, outertaper, innertaper, modelimage, restoringbeam,
pbcor, minpb, usescratch, noise, npixels, npercycle, cyclefactor,
cyclespeedup, nterms, reffreq, chaniter, flatnoise, allowchunk):
if not (type(ncpu) is int):
casalog.post('ncpu should be an integer')
ncpu = 8
if doreg:
# check if ephemfile and msinfofile exist
try:
ephem=vla_prep.read_horizons(ephemfile = ephemfile)
except ValueError:
print("error in reading ephemeris file")
if not os.path.isfile(msinfofile):
print("msinfofile does not exist!")
else:
ephem=None
# get number of time pixels
ms.open(vis)
ms.selectinit()
timfreq = ms.getdata(['time', 'axis_info'], ifraxis = True)
tim = timfreq['time']
dt = tim[1]-tim[0] #need to change to median of all time intervals
freq = timfreq['axis_info']['freq_axis']['chan_freq'].flatten()
ms.close()
if twidth < 1 or twidth > len(tim):
casalog.post('twidth not between 1 and # of time pixels in the dataset. Change to 1')
twidth = 1
# find out the start and end time index according to the parameter timerange
# if not defined (empty string), use start and end from the entire time of the ms
if not timerange:
btidx = 0
etidx = len(tim)
else:
try:
(tstart, tend)=timerange.split('~')
bt_s = qa.convert(qa.quantity(tstart,'s'),'s')['value']
et_s = qa.convert(qa.quantity(tend,'s'),'s')['value']
# only time is given but not date, add the date (at 0 UT) from the first record
if bt_s < 86400. or et_s < 86400.:
bt_s += np.fix(qa.convert(qa.quantity(tim[0],'s'),'d')['value'])*86400.
et_s += np.fix(qa.convert(qa.quantity(tim[0],'s'),'d')['value'])*86400.
btidx = np.argmin(np.abs(tim-bt_s))
etidx = np.argmin(np.abs(tim-et_s))
# make the indice back to those bracket by the timerange
if tim[btidx] < bt_s:
btidx += 1
if tim[etidx] > et_s:
etidx -= 1
if etidx <= btidx:
print "ending time must be greater than starting time"
print "reinitiating to the entire time range"
btidx = 0
etidx = len(tim)
except ValueError:
print "keyword 'timerange' has a wrong format"
btstr=qa.time(qa.quantity(tim[btidx],'s'),prec=9)[0]
etstr=qa.time(qa.quantity(tim[etidx],'s'),prec=9)[0]
iterable = range(btidx, etidx+1, twidth)
print 'First time pixel: '+btstr
print 'Last time pixel: '+etstr
print str(len(iterable))+' images to clean...'
# partition
clnpart = partial(clean_iter, tim, freq, vis,
imageprefix, ncpu, twidth, doreg, ephemfile, ephem, msinfofile,
outlierfile, field, spw, selectdata,
uvrange, antenna, scan, observation, intent, mode, resmooth,gridmode,
wprojplanes, facets, cfcache, rotpainc, painc, aterm, psterm, mterm, wbawp, conjbeams,
epjtable, interpolation,
niter, gain, threshold, psfmode, imagermode, ftmachine, mosweight,
scaletype, multiscale, negcomponent, smallscalebias,
interactive, mask, nchan, start, width, outframe,
veltype, imsize, cell, phasecenter, restfreq, stokes, weighting,
robust, uvtaper, outertaper, innertaper, modelimage, restoringbeam,
pbcor, minpb, usescratch, noise, npixels, npercycle, cyclefactor,
cyclespeedup, nterms, reffreq, chaniter, flatnoise, allowchunk)
timelapse = 0
casalog.post('Perform clean in parallel ...')
t0 = time()
pool = mp.Pool(ncpu)
dummy = pool.map_async(clnpart, iterable)
pool.close()
pool.join()
t1 = time()
timelapse = t1 - t0
print 'It took %f secs to complete' % timelapse
def bulk_detect_face(images, detection_window_size_ratio, pnet, rnet, onet,
threshold, factor):
"""Detects faces in a list of images
images: list containing input images
detection_window_size_ratio: ratio of minimum face size to smallest image dimension
pnet, rnet, onet: caffemodel
threshold: threshold=[th1 th2 th3], th1-3 are three steps's threshold [0-1]
factor: the factor used to create a scaling pyramid of face sizes to detect in the image.
"""
all_scales = [None] * len(images)
images_with_boxes = [None] * len(images)
for i in range(len(images)):
images_with_boxes[i] = {'total_boxes': np.empty((0, 9))}
# create scale pyramid
for index, img in enumerate(images):
all_scales[index] = []
h = img.shape[0]
w = img.shape[1]
minsize = int(detection_window_size_ratio * np.minimum(w, h))
factor_count = 0
minl = np.amin([h, w])
if minsize <= 12:
minsize = 12
m = 12.0 / minsize
minl = minl * m
while minl >= 12:
all_scales[index].append(m * np.power(factor, factor_count))
minl = minl * factor
factor_count += 1
# # # # # # # # # # # # #
# first stage - fast proposal network (pnet) to obtain face candidates
# # # # # # # # # # # # #
images_obj_per_resolution = {}
# TODO: use some type of rounding to number module 8 to increase probability that pyramid images will have the same resolution across input images
for index, scales in enumerate(all_scales):
h = images[index].shape[0]
w = images[index].shape[1]
for scale in scales:
hs = int(np.ceil(h * scale))
ws = int(np.ceil(w * scale))
if (ws, hs) not in images_obj_per_resolution:
images_obj_per_resolution[(ws, hs)] = []
im_data = imresample(images[index], (hs, ws))
im_data = (im_data - 127.5) * 0.0078125
img_y = np.transpose(
im_data, (1, 0, 2)) # caffe uses different dimensions ordering
images_obj_per_resolution[(ws, hs)].append({
'scale': scale,
'image': img_y,
'index': index
})
for resolution in images_obj_per_resolution:
images_per_resolution = [
i['image'] for i in images_obj_per_resolution[resolution]
]
outs = pnet(images_per_resolution)
for index in range(len(outs[0])):
scale = images_obj_per_resolution[resolution][index]['scale']
image_index = images_obj_per_resolution[resolution][index]['index']
out0 = np.transpose(outs[0][index], (1, 0, 2))
out1 = np.transpose(outs[1][index], (1, 0, 2))
boxes, _ = generateBoundingBox(out1[:, :, 1].copy(),
out0[:, :, :].copy(), scale,
threshold[0])
# inter-scale nms
pick = nms(boxes.copy(), 0.5, 'Union')
if boxes.size > 0 and pick.size > 0:
boxes = boxes[pick, :]
images_with_boxes[image_index]['total_boxes'] = np.append(
images_with_boxes[image_index]['total_boxes'],
boxes,
axis=0)
for index, image_obj in enumerate(images_with_boxes):
numbox = image_obj['total_boxes'].shape[0]
if numbox > 0:
h = images[index].shape[0]
w = images[index].shape[1]
pick = nms(image_obj['total_boxes'].copy(), 0.7, 'Union')
image_obj['total_boxes'] = image_obj['total_boxes'][pick, :]
regw = image_obj['total_boxes'][:, 2] - image_obj['total_boxes'][:,
0]
regh = image_obj['total_boxes'][:, 3] - image_obj['total_boxes'][:,
1]
qq1 = image_obj[
'total_boxes'][:, 0] + image_obj['total_boxes'][:, 5] * regw
qq2 = image_obj[
'total_boxes'][:, 1] + image_obj['total_boxes'][:, 6] * regh
qq3 = image_obj[
'total_boxes'][:, 2] + image_obj['total_boxes'][:, 7] * regw
qq4 = image_obj[
'total_boxes'][:, 3] + image_obj['total_boxes'][:, 8] * regh
image_obj['total_boxes'] = np.transpose(
np.vstack([qq1, qq2, qq3, qq4, image_obj['total_boxes'][:,
4]]))
image_obj['total_boxes'] = rerec(image_obj['total_boxes'].copy())
image_obj['total_boxes'][:, 0:4] = np.fix(
image_obj['total_boxes'][:, 0:4]).astype(np.int32)
dy, edy, dx, edx, y, ey, x, ex, tmpw, tmph = pad(
image_obj['total_boxes'].copy(), w, h)
numbox = image_obj['total_boxes'].shape[0]
tempimg = np.zeros((24, 24, 3, numbox))
if numbox > 0:
for k in range(0, numbox):
tmp = np.zeros((int(tmph[k]), int(tmpw[k]), 3))
tmp[dy[k] - 1:edy[k],
dx[k] - 1:edx[k], :] = images[index][y[k] - 1:ey[k],
x[k] - 1:ex[k], :]
if tmp.shape[0] > 0 and tmp.shape[1] > 0 or tmp.shape[
0] == 0 and tmp.shape[1] == 0:
tempimg[:, :, :, k] = imresample(tmp, (24, 24))
else:
return np.empty()
tempimg = (tempimg - 127.5) * 0.0078125
image_obj['rnet_input'] = np.transpose(tempimg, (3, 1, 0, 2))
# # # # # # # # # # # # #
# second stage - refinement of face candidates with rnet
# # # # # # # # # # # # #
bulk_rnet_input = np.empty((0, 24, 24, 3))
for index, image_obj in enumerate(images_with_boxes):
if 'rnet_input' in image_obj:
bulk_rnet_input = np.append(bulk_rnet_input,
image_obj['rnet_input'],
axis=0)
out = rnet(bulk_rnet_input)
out0 = np.transpose(out[0])
out1 = np.transpose(out[1])
score = out1[1, :]
i = 0
for index, image_obj in enumerate(images_with_boxes):
if 'rnet_input' not in image_obj:
continue
rnet_input_count = image_obj['rnet_input'].shape[0]
score_per_image = score[i:i + rnet_input_count]
out0_per_image = out0[:, i:i + rnet_input_count]
ipass = np.where(score_per_image > threshold[1])
image_obj['total_boxes'] = np.hstack([
image_obj['total_boxes'][ipass[0], 0:4].copy(),
np.expand_dims(score_per_image[ipass].copy(), 1)
])
mv = out0_per_image[:, ipass[0]]
if image_obj['total_boxes'].shape[0] > 0:
h = images[index].shape[0]
w = images[index].shape[1]
pick = nms(image_obj['total_boxes'], 0.7, 'Union')
image_obj['total_boxes'] = image_obj['total_boxes'][pick, :]
image_obj['total_boxes'] = bbreg(image_obj['total_boxes'].copy(),
np.transpose(mv[:, pick]))
image_obj['total_boxes'] = rerec(image_obj['total_boxes'].copy())
numbox = image_obj['total_boxes'].shape[0]
if numbox > 0:
tempimg = np.zeros((48, 48, 3, numbox))
image_obj['total_boxes'] = np.fix(
image_obj['total_boxes']).astype(np.int32)
dy, edy, dx, edx, y, ey, x, ex, tmpw, tmph = pad(
image_obj['total_boxes'].copy(), w, h)
for k in range(0, numbox):
tmp = np.zeros((int(tmph[k]), int(tmpw[k]), 3))
tmp[dy[k] - 1:edy[k],
dx[k] - 1:edx[k], :] = images[index][y[k] - 1:ey[k],
x[k] - 1:ex[k], :]
if tmp.shape[0] > 0 and tmp.shape[1] > 0 or tmp.shape[
0] == 0 and tmp.shape[1] == 0:
tempimg[:, :, :, k] = imresample(tmp, (48, 48))
else:
return np.empty()
tempimg = (tempimg - 127.5) * 0.0078125
image_obj['onet_input'] = np.transpose(tempimg, (3, 1, 0, 2))
i += rnet_input_count
# # # # # # # # # # # # #
# third stage - further refinement and facial landmarks positions with onet
# # # # # # # # # # # # #
bulk_onet_input = np.empty((0, 48, 48, 3))
for index, image_obj in enumerate(images_with_boxes):
if 'onet_input' in image_obj:
bulk_onet_input = np.append(bulk_onet_input,
image_obj['onet_input'],
axis=0)
out = onet(bulk_onet_input)
out0 = np.transpose(out[0])
out1 = np.transpose(out[1])
out2 = np.transpose(out[2])
score = out2[1, :]
points = out1
i = 0
ret = []
for index, image_obj in enumerate(images_with_boxes):
if 'onet_input' not in image_obj:
ret.append(None)
continue
onet_input_count = image_obj['onet_input'].shape[0]
out0_per_image = out0[:, i:i + onet_input_count]
score_per_image = score[i:i + onet_input_count]
points_per_image = points[:, i:i + onet_input_count]
ipass = np.where(score_per_image > threshold[2])
points_per_image = points_per_image[:, ipass[0]]
image_obj['total_boxes'] = np.hstack([
image_obj['total_boxes'][ipass[0], 0:4].copy(),
np.expand_dims(score_per_image[ipass].copy(), 1)
])
mv = out0_per_image[:, ipass[0]]
w = image_obj['total_boxes'][:, 2] - image_obj['total_boxes'][:, 0] + 1
h = image_obj['total_boxes'][:, 3] - image_obj['total_boxes'][:, 1] + 1
points_per_image[
0:5, :] = np.tile(w, (5, 1)) * points_per_image[0:5, :] + np.tile(
image_obj['total_boxes'][:, 0], (5, 1)) - 1
points_per_image[
5:10, :] = np.tile(h,
(5, 1)) * points_per_image[5:10, :] + np.tile(
image_obj['total_boxes'][:, 1], (5, 1)) - 1
if image_obj['total_boxes'].shape[0] > 0:
image_obj['total_boxes'] = bbreg(image_obj['total_boxes'].copy(),
np.transpose(mv))
pick = nms(image_obj['total_boxes'].copy(), 0.7, 'Min')
image_obj['total_boxes'] = image_obj['total_boxes'][pick, :]
points_per_image = points_per_image[:, pick]
ret.append((image_obj['total_boxes'], points_per_image))
else:
ret.append(None)
i += onet_input_count
return ret
def continous_wavelet(X, dt, pad=False, wavelet=morlet, **kwargs):
"""
Computes the wavelet transform of the vector X, with sampling rate dt.
inputs:
X - the time series, numpy array
dt - sampling time of dt
pad - if True, pad time series with 0 to get len(X) up to the next higher power of 2. It speeds up the FFT.
wavelet - which mother wavelet should be used. (morlet, paul, DOG)
--- kwargs ---
dj - the spacing between discrete scales.
s0 - the smallest scale of the wavelet
j1 - the number of scales minus one. Scales range from s0 up to s0 * 2^(j1+dj) to give a total of j1+1 scales.
k0 - parameter of Mother wavelet: Morlet - wavenumber, Paul - order, DOG - derivative
outputs:
wave - wavelet transform of the X. It is a complex numpy array of dim (n, j1+1)
period - the vector of Fourier periods in time units
scale - the vector of scale indices, given by s0 * 2^(j*dj)
coi - Cone-of-Influence, vector that contains a maximum period of useful information at particular time
"""
# map arguments
if 'dj' in kwargs:
dj = kwargs['dj']
else:
dj = 0.25
if 's0' in kwargs:
s0 = kwargs['s0']
else:
s0 = 2 * dt
if 'j1' in kwargs:
j1 = np.int(kwargs['j1'])
else:
j1 = np.fix(np.log(len(X) * dt / s0) / np.log(2)) / dj
if 'k0' in kwargs:
k0 = kwargs['k0']
else:
k0 = 6.
n1 = len(X)
Y = X - np.mean(X)
#Y = X
# padding, if needed
if pad:
base2 = int(np.fix(np.log(n1) / np.log(2) +
0.4999999)) # power of 2 nearest to len(X)
Y = np.concatenate((Y, np.zeros((np.power(2, (base2 + 1)) - n1))))
n = len(Y)
# wavenumber array
k = np.arange(1, np.fix(n / 2) + 1)
k *= (2. * np.pi) / (n * dt)
k_minus = -k[int(np.fix(n - 1)) / 2 - 1::-1]
k = np.concatenate((np.array([0.]), k, k_minus))
# compute FFT of the (padded) time series
f = fft(Y)
# construct scale array and empty period & wave arrays
scale = np.array([s0 * np.power(2, x * dj) for x in range(0, j1 + 1)])
period = scale
wave = np.zeros((j1 + 1, n), dtype=np.complex)
# loop through scales and compute tranform
for i in range(j1 + 1):
daughter, fourier_factor, coi = wavelet(k, scale[i], k0)
wave[i, :] = ifft(f * daughter)
period = fourier_factor * scale
coi *= dt * np.concatenate((np.array([1e-5]), np.arange(
1, (n1 + 1) / 2), np.arange((n1 / 2 - 1), 0, -1), np.array([1e-5])))
wave = wave[:, :n1]
return wave, period, scale, coi
def detect_face(img, minsize, pnet, rnet, onet, threshold, factor):
"""Detects faces in image, and returns bounding boxes and points for them.
img: input image
minsize: minimum faces' size
pnet, rnet, onet: caffemodel
threshold: threshold=[th1, th2, th3], th1-3 are three steps's threshold
factor: the factor used to create a scaling pyramid of face sizes to
detect in the image.
"""
factor_count = 0
total_boxes = np.empty((0, 9))
points = np.empty(0)
h = img.shape[0]
w = img.shape[1]
minl = np.amin([h, w])
m = 12.0 / minsize
minl = minl * m
# create scale pyramid
scales = []
while minl >= 12:
scales += [m * np.power(factor, factor_count)]
minl = minl * factor
factor_count += 1
# first stage
for scale in scales:
hs = int(np.ceil(h * scale))
ws = int(np.ceil(w * scale))
im_data = imresample(img, (hs, ws))
im_data = (im_data - 127.5) * 0.0078125
img_x = np.expand_dims(im_data, 0)
img_y = np.transpose(img_x, (0, 2, 1, 3))
out = pnet(img_y)
out0 = np.transpose(out[0], (0, 2, 1, 3))
out1 = np.transpose(out[1], (0, 2, 1, 3))
boxes, _ = generateboundingbox(out1[0, :, :,
1].copy(), out0[0, :, :, :].copy(),
scale, threshold[0])
# inter-scale nms
pick = nms(boxes.copy(), 0.5, 'Union')
if boxes.size > 0 and pick.size > 0:
boxes = boxes[pick, :]
total_boxes = np.append(total_boxes, boxes, axis=0)
numbox = total_boxes.shape[0]
if numbox > 0:
pick = nms(total_boxes.copy(), 0.7, 'Union')
total_boxes = total_boxes[pick, :]
regw = total_boxes[:, 2] - total_boxes[:, 0]
regh = total_boxes[:, 3] - total_boxes[:, 1]
qq1 = total_boxes[:, 0] + total_boxes[:, 5] * regw
qq2 = total_boxes[:, 1] + total_boxes[:, 6] * regh
qq3 = total_boxes[:, 2] + total_boxes[:, 7] * regw
qq4 = total_boxes[:, 3] + total_boxes[:, 8] * regh
total_boxes = np.transpose(
np.vstack([qq1, qq2, qq3, qq4, total_boxes[:, 4]]))
total_boxes = rerec(total_boxes.copy())
total_boxes[:, 0:4] = np.fix(total_boxes[:, 0:4]).astype(np.int32)
dy, edy, dx, edx, y, ey, x, ex, tmpw, tmph = pad(
total_boxes.copy(), w, h)
numbox = total_boxes.shape[0]
if numbox > 0:
# second stage
tempimg = np.zeros((24, 24, 3, numbox))
for k in range(0, numbox):
tmp = np.zeros((int(tmph[k]), int(tmpw[k]), 3))
tmp[dy[k] - 1:edy[k], dx[k] - 1:edx[k], :] = img[y[k] - 1:ey[k],
x[k] - 1:ex[k], :]
if tmp.shape[0] > 0 and tmp.shape[1] > 0 or tmp.shape[
0] == 0 and tmp.shape[1] == 0:
tempimg[:, :, :, k] = imresample(tmp, (24, 24))
else:
return np.empty()
tempimg = (tempimg - 127.5) * 0.0078125
tempimg1 = np.transpose(tempimg, (3, 1, 0, 2))
out = rnet(tempimg1)
out0 = np.transpose(out[0])
out1 = np.transpose(out[1])
score = out1[1, :]
ipass = np.where(score > threshold[1])
total_boxes = np.hstack([
total_boxes[ipass[0], 0:4].copy(),
np.expand_dims(score[ipass].copy(), 1)
])
mv = out0[:, ipass[0]]
if total_boxes.shape[0] > 0:
pick = nms(total_boxes, 0.7, 'Union')
total_boxes = total_boxes[pick, :]
total_boxes = bbreg(total_boxes.copy(), np.transpose(mv[:, pick]))
total_boxes = rerec(total_boxes.copy())
numbox = total_boxes.shape[0]
if numbox > 0:
# third stage
total_boxes = np.fix(total_boxes).astype(np.int32)
dy, edy, dx, edx, y, ey, x, ex, tmpw, tmph = pad(
total_boxes.copy(), w, h)
tempimg = np.zeros((48, 48, 3, numbox))
for k in range(0, numbox):
tmp = np.zeros((int(tmph[k]), int(tmpw[k]), 3))
tmp[dy[k] - 1:edy[k], dx[k] - 1:edx[k], :] = img[y[k] - 1:ey[k],
x[k] - 1:ex[k], :]
if tmp.shape[0] > 0 and tmp.shape[1] > 0 or tmp.shape[
0] == 0 and tmp.shape[1] == 0:
tempimg[:, :, :, k] = imresample(tmp, (48, 48))
else:
return np.empty()
tempimg = (tempimg - 127.5) * 0.0078125
tempimg1 = np.transpose(tempimg, (3, 1, 0, 2))
out = onet(tempimg1)
out0 = np.transpose(out[0])
out1 = np.transpose(out[1])
out2 = np.transpose(out[2])
score = out2[1, :]
points = out1
ipass = np.where(score > threshold[2])
points = points[:, ipass[0]]
total_boxes = np.hstack([
total_boxes[ipass[0], 0:4].copy(),
np.expand_dims(score[ipass].copy(), 1)
])
mv = out0[:, ipass[0]]
w = total_boxes[:, 2] - total_boxes[:, 0] + 1
h = total_boxes[:, 3] - total_boxes[:, 1] + 1
points[0:5, :] = np.tile(w, (5, 1)) * points[0:5, :] + np.tile(
total_boxes[:, 0], (5, 1)) - 1
points[5:10, :] = np.tile(h, (5, 1)) * points[5:10, :] + np.tile(
total_boxes[:, 1], (5, 1)) - 1
if total_boxes.shape[0] > 0:
total_boxes = bbreg(total_boxes.copy(), np.transpose(mv))
pick = nms(total_boxes.copy(), 0.7, 'Min')
total_boxes = total_boxes[pick, :]
points = points[:, pick]
return total_boxes, points
def nmea2deg(nmea):
deg = (np.fix(nmea / 100) +
np.sign(nmea) * np.remainder(np.abs(nmea), 100) / 60)
return deg