def __sliding_window_fast(array: np.ndarray,
window_size: int,
mode: str = "attack") -> np.ndarray:
if mode == "attack":
window_size = make_odd(window_size)
return maximum_filter1d(array, size=(2 * window_size - 1))
half_window_size = (window_size - 1) // 2
array = np.pad(array, (half_window_size, 0))
return maximum_filter1d(array, size=window_size)[:-half_window_size]
def prominent_peaks(image, min_xdistance, min_ydistance, threshold=None):
img = image.copy()
rows, cols = img.shape
if threshold is None:
threshold = 0.5 * np.max(img)
yc_size = 2 * min_ydistance + 1
xc_size = 2 * min_xdistance + 1
img_max = maximum_filter1d(img,
size=yc_size,
axis=0,
mode='constant',
cval=0)
img_max = maximum_filter1d(img_max,
size=xc_size,
axis=1,
mode='constant',
cval=0)
mask = (img == img_max)
img *= mask
img_t = img > threshold
label_img = measure.label(img_t)
props = measure.regionprops(label_img, img_max)
props = sorted(props, key=lambda x: x.max_intensity)[::-1]
coords = np.array([np.round(p.centroid) for p in props], dtype=int)
yc_peaks = []
xc_peaks = []
yc_ext, xc_ext = np.mgrid[-min_ydistance:min_ydistance + 1,
-min_xdistance:min_xdistance + 1]
for yc_idx, xc_idx in coords:
accum = img_max[yc_idx, xc_idx]
if accum > threshold:
yc_nh = yc_idx + yc_ext
xc_nh = xc_idx + xc_ext
yc_in = np.logical_and(yc_nh > 0, yc_nh < rows)
yc_nh = yc_nh[yc_in]
xc_nh = xc_nh[yc_in]
xc_low = xc_nh < 0
yc_nh[xc_low] = rows - yc_nh[xc_low]
xc_nh[xc_low] += cols
xc_high = xc_nh >= cols
yc_nh[xc_high] = rows - yc_nh[xc_high]
xc_nh[xc_high] -= cols
img_max[yc_nh, xc_nh] = 0
yc_peaks.append(yc_idx)
xc_peaks.append(xc_idx)
return np.transpose(np.vstack(
(np.array(xc_peaks), np.array(yc_peaks)))).astype(int)
def _find_peak_locations_fn(logits, size, threshold):
assert size % 2 == 1
assert logits.ndim == 2 and logits.shape[1] == 88
logits_max = maximum_filter1d(logits,
size=size,
axis=0,
mode='constant')
assert logits_max.shape == logits.shape
logits_peak_ids = np.logical_and(logits == logits_max,
logits > threshold)
# Due to numerical precision, there could be multiple peaks within a window.
# In this case, we use the first peak and remove the other peaks.
num_frames = len(logits)
hs = (size - 1) // 2
for pitch in xrange(88):
for frame_idx in xrange(num_frames - hs):
if logits_peak_ids[frame_idx, pitch]:
for fidx in xrange(hs):
if logits_peak_ids[frame_idx + 1 + fidx, pitch]:
logits_peak_ids[frame_idx + 1 + fidx,
pitch] = False
logits_peak_ids = np.where(logits_peak_ids)
return logits_peak_ids
def preprocessFeatureMat(X, Lfilt): """ Binarizes and blurs the feature matrix Parameters ---------- X : 2D array The original feature matrix (presumably output by buildFeatureMat()) Lfilt : int The width of the hamming filter used to blur the feature matrix. Returns ------- X : 2D array The modified feature matrix without blur Xblur : 2D array The modified feature matrix with blur """ Xblur = _filterRows(X, Lfilt) # ensure that the maximum value in Xblur is 1; we do this by dividing # by the largets value within Lfilt / 2, rather than just clamping, so # that there's a smooth dropoff as you move away from dense groups of # 1s in X; otherwise it basically ends up max-pooled maxima = filters.maximum_filter1d(Xblur, Lfilt // 2, axis=1, mode='constant') Xblur[maxima > 0] /= maxima[maxima > 0] # have columns be adjacent in memory return np.asfortranarray(X), np.asfortranarray(Xblur)
def dff(C, sig_baseline=10, win_baseline=300, sig_output=3, method='maximin'):
"""
delta F / F using maximin method from Suite2P
inputs: C - neuropil subtracted fluorescence (neurons x timepoints)
outputs dFF - neurons x timepoints
:param C:
:param sig_baseline:
:param win_baseline:
:param sig_output:
:param method:
:return:
"""
if method == 'maximin': # windowed baseline estimation
flow = filters.gaussian_filter(C, [0, sig_baseline])
flow = filters.minimum_filter1d(flow, win_baseline, axis=1)
flow = filters.maximum_filter1d(flow, win_baseline, axis=1)
else:
flow = None
raise NotImplementedError
C -= flow # substract baseline (dF)
C /= flow # divide by baseline (dF/F)
return filters.gaussian_filter(C, [0, sig_output]) # smooth result
def _rolling_nanmax_1d(a, w=None):
"""
Compute the rolling max for 1-D while ignoring NaNs.
This essentially replaces:
`np.nanmax(rolling_window(T[..., start:stop], m), axis=T.ndim)`
Parameters
----------
a : ndarray
The input array
w : ndarray, default None
The rolling window size
Returns
-------
output : ndarray
Rolling window nanmax.
"""
if w is None:
w = a.shape[0]
half_window_size = int(math.ceil((w - 1) / 2))
return maximum_filter1d(a, size=w)[half_window_size:half_window_size +
a.shape[0] - w + 1]
def detect(self, threshold, combine=30, pre_avg=100, pre_max=30,
post_avg=30, post_max=70, delay=0):
"""
Detects the onsets.
:param threshold: threshold for peak-picking
:param combine: only report 1 onset for N miliseconds
:param pre_avg: use N miliseconds past information for moving average
:param pre_max: use N miliseconds past information for moving maximum
:param post_avg: use N miliseconds future information for mov. average
:param post_max: use N miliseconds future information for mov. maximum
:param delay: report the onset N miliseconds delayed
In online mode, post_avg and post_max are set to 0.
Implements the peak-picking method described in:
"Evaluating the Online Capabilities of Onset Detection Methods"
Sebastian Böck, Florian Krebs and Markus Schedl
Proceedings of the 13th International Society for Music Information
Retrieval Conference (ISMIR), 2012
"""
# online mode?
if self.online:
post_max = 0
post_avg = 0
# convert timing information to frames
pre_avg = int(round(self.fps * pre_avg / 1000.))
pre_max = int(round(self.fps * pre_max / 1000.))
post_max = int(round(self.fps * post_max / 1000.))
post_avg = int(round(self.fps * post_avg / 1000.))
# convert to seconds
combine /= 1000.
delay /= 1000.
# init detections
self.detections = []
# moving maximum
max_length = pre_max + post_max + 1
max_origin = int(np.floor((pre_max - post_max) / 2))
mov_max = maximum_filter1d(self.activations, max_length,
mode='constant', origin=max_origin)
# moving average
avg_length = pre_avg + post_avg + 1
avg_origin = int(np.floor((pre_avg - post_avg) / 2))
mov_avg = uniform_filter1d(self.activations, avg_length,
mode='constant', origin=avg_origin)
# detections are activation equal to the maximum
detections = self.activations * (self.activations == mov_max)
# detections must be greater or equal than the mov. average + threshold
detections = detections * (detections >= mov_avg + threshold)
# convert detected onsets to a list of timestamps
last_onset = 0
for i in np.nonzero(detections)[0]:
onset = float(i) / float(self.fps) + delay
# only report an onset if the last N miliseconds none was reported
if onset > last_onset + combine:
self.detections.append(onset)
# save last reported onset
last_onset = onset
def preprocessFeatureMat(X, Lfilt):
"""
Binarizes and blurs the feature matrix
Parameters
----------
X : 2D array
The original feature matrix (presumably output by buildFeatureMat())
Lfilt : int
The width of the hamming filter used to blur the feature matrix.
Returns
-------
X : 2D array
The modified feature matrix without blur
Xblur : 2D array
The modified feature matrix with blur
"""
Xblur = _filterRows(X, Lfilt)
# ensure that the maximum value in Xblur is 1; we do this by dividing
# by the largets value within Lfilt / 2, rather than just clamping, so
# that there's a smooth dropoff as you move away from dense groups of
# 1s in X; otherwise it basically ends up max-pooled
maxima = filters.maximum_filter1d(Xblur,
Lfilt // 2,
axis=1,
mode='constant')
Xblur[maxima > 0] /= maxima[maxima > 0]
# have columns be adjacent in memory
return np.asfortranarray(X), np.asfortranarray(Xblur)
def Undersampled_Lip_Tragectory(phrase, Sleep_Time):
A = "espeak -z -s 100 -v female5 -w test.wav "
A = A + "'" + phrase + "'"
#os.system("espeak -z -s 80 -v female5 -w test.wav 'Hey, why no one is looking at me? I feel neglected. I feel it! I am afraid!' ")
os.system(A)
samplerate, data = wavfile.read('test.wav')
dt = 1 / float(samplerate)
times = np.arange(len(data)) / float(samplerate)
N = len(times)
max_data = maximum_filter1d(data, size=1000)
max_data = gaussian_filter(max_data, sigma=100)
max_Amplitude = 10
Amplitude = max_Amplitude * (max_data / float(np.max(max_data)))
n = Sleep_Time * samplerate
Amp = []
T = []
i = 0
while (i * n < N):
Amp.append(Amplitude[int(i * n)])
T.append(times[int(i * n)])
i = i + 1
Amp = np.array(Amp)
T = np.array(T)
'''
plt.figure(1)
plt.suptitle(phrase)
plt.subplot(211)
plt.plot(times,data)
plt.plot(times,max_data,'r')
plt.subplot(212)
plt.plot(times,Amplitude)
plt.plot(T,Amp,'r*')
plt.show()
'''
return Amp, T
def Undersampled_Lip_Tragectory(phrase, Sleep_Time):
A = "espeak -z -s 80 -v female5 -w test.wav "
A = A + "'" + phrase + "'"
os.system(A)
samplerate, data = wavfile.read('test.wav')
dt = 1 / float(samplerate)
times = np.arange(len(data)) / float(samplerate)
N = len(times)
max_data = maximum_filter1d(data, size=1000)
max_data = gaussian_filter(max_data, sigma=100)
max_Amplitude = 10
Amplitude = max_Amplitude * (max_data / float(np.max(max_data)))
n = Sleep_Time * samplerate
Amp = []
T = []
i = 0
while (i * n < N):
Amp.append(Amplitude[int(i * n)])
T.append(times[int(i * n)])
i = i + 1
Amp = np.array(Amp)
T = np.array(T)
return Amp, T
def Speech(phrase):
flag = Event()
flag.set()
A = "espeak -z -s 80 -w temp.wav "
A = A + "'" + phrase + "'"
os.system(A)
samplerate, data = wavfile.read('temp.wav')
times = np.arange(len(data)) / float(samplerate)
max_data = maximum_filter1d(data, size=500)
max_Amplitude = 10
Amplitude = max_Amplitude * (max_data / float(np.max(max_data)))
plt.figure(1)
plt.plot(times, data)
plt.plot(times, max_data, 'r')
plt.show()
plt.figure(2)
plt.plot(times, Amplitude)
plt.show()
thread_movement = Thread(target=MoveLips, args=(times, Amplitude, flag))
thread_talk = Thread(target=Talk, args=(phrase, flag))
thread_talk.start()
thread_movement.start()
thread_talk.join()
thread_movement.join()
print(np.max(max_data))
def get_2D_peaks(arr2D, plot=False, amp_min=DEFAULT_AMP_MIN):
# http://docs.scipy.org/doc/scipy/reference/generated/scipy.ndimage.iterate_structure.html#scipy.ndimage.iterate_structure
struct = generate_binary_structure(2, 1)
neighborhood = iterate_structure(struct, PEAK_NEIGHBORHOOD_SIZE)
# find local maxima using our filter shape
local_max = maximum_filter1d(arr2D,
size=PEAK_NEIGHBORHOOD_SIZE * 2 + 1,
axis=0)
local_max = maximum_filter1d(local_max,
size=PEAK_NEIGHBORHOOD_SIZE * 2 + 1,
axis=1)
local_max = local_max == arr2D
background = (arr2D == 0)
eroded_background = binary_erosion(background,
structure=neighborhood,
border_value=1)
# Boolean mask of arr2D with True at peaks (Fixed deprecated boolean operator by changing '-' to '^')
detected_peaks = local_max ^ eroded_background
# extract peaks
amps = arr2D[detected_peaks]
j, i = np.where(detected_peaks)
# filter peaks
amps = amps.flatten()
peaks = zip(i, j, amps)
peaks_filtered = filter(lambda x: x[2] > amp_min, peaks) # freq, time, amp
# get indices for frequency and time
frequency_idx = []
time_idx = []
for x in peaks_filtered:
frequency_idx.append(x[1])
time_idx.append(x[0])
if plot:
# scatter of the peaks
fig, ax = plt.subplots()
ax.imshow(arr2D)
ax.scatter(time_idx, frequency_idx)
ax.set_xlabel('Time')
ax.set_ylabel('Frequency')
ax.set_title("Spectrogram")
plt.gca().invert_yaxis()
plt.show()
return zip(frequency_idx, time_idx)
def validate_signal(t, y, t_ref, y_ref, num=1000, dx=20, dy=0.1):
""" Validate a signal y(t) against a reference signal y_ref(t_ref) by creating a band
around y_ref and finding the values in y outside the band
Parameters:
t time of the signal
y values of the signal
t_ref time of the reference signal
y_ref values of the reference signal
num number of samples for the band
dx horizontal width of the band in samples
dy vertical distance of the band to y_ref
Returns:
t_band time values of the band
y_min lower limit of the band
y_max upper limit of the band
i_out indices of the values in y outside the band
"""
from scipy.ndimage.filters import maximum_filter1d, minimum_filter1d
from scipy.interpolate import interp1d
# re-sample the reference signal into a uniform grid
t_band = np.linspace(start=t_ref[0], stop=t_ref[-1], num=num)
# make t_ref strictly monotonic by adding epsilon to duplicate sample times
for i in range(1, len(t_ref)):
while t_ref[i - 1] >= t_ref[i]:
t_ref[i] = t_ref[i] + 1e-13
interp_method = 'linear' if y.dtype == np.float64 else 'zero'
y_band = interp1d(x=t_ref, y=y_ref, kind=interp_method)(t_band)
y_band_min = np.min(y_band)
y_band_max = np.max(y_band)
# calculate the width of the band
if y_band_min == y_band_max:
w = 0.5 if y_band_min == 0 else np.abs(y_band_min) * dy
else:
w = (y_band_max - y_band_min) * dy
# calculate the lower and upper limits
y_min = minimum_filter1d(input=y_band, size=dx) - w
y_max = maximum_filter1d(input=y_band, size=dx) + w
# find outliers
y_min_i = np.interp(x=t, xp=t_band, fp=y_min)
y_max_i = np.interp(x=t, xp=t_band, fp=y_max)
i_out = np.logical_or(y < y_min_i, y > y_max_i)
# do not count outliers outside the t_ref
i_out = np.logical_and(i_out, t > t_band[0])
i_out = np.logical_and(i_out, t < t_band[-1])
return t_band, y_min, y_max, i_out
def get_mask(y, rpad=20, nmax=20):
xp = y[1, :, :].flatten().astype('int32')
yp = y[0, :, :].flatten().astype('int32')
_, Ly, Lx = y.shape
xm, ym = np.meshgrid(np.arange(Lx), np.arange(Ly))
xedges = np.arange(-.5 - rpad, xm.shape[1] + .5 + rpad, 1)
yedges = np.arange(-.5 - rpad, xm.shape[0] + .5 + rpad, 1)
#xp = (xm-dx).flatten().astype('int32')
#yp = (ym-dy).flatten().astype('int32')
h, _, _ = np.histogram2d(xp, yp, bins=[xedges, yedges])
hmax = maximum_filter1d(h, 5, axis=0)
hmax = maximum_filter1d(hmax, 5, axis=1)
yo, xo = np.nonzero(np.logical_and(h - hmax > -1e-6, h > 10))
Nmax = h[yo, xo]
isort = np.argsort(Nmax)[::-1]
yo, xo = yo[isort], xo[isort]
pix = []
for t in range(len(yo)):
pix.append([yo[t], xo[t]])
for iter in range(5):
for k in range(len(pix)):
ye, xe = extendROI(pix[k][0], pix[k][1], h.shape[0], h.shape[1], 1)
igood = h[ye, xe] > 2
ye, xe = ye[igood], xe[igood]
pix[k][0] = ye
pix[k][1] = xe
ibad = np.ones(len(pix), 'bool')
for k in range(len(pix)):
#print(pix[k][0].size)
if pix[k][0].size < nmax:
ibad[k] = 0
#pix = [pix[k] for k in ibad.nonzero()[0]]
M = np.zeros(h.shape)
for k in range(len(pix)):
M[pix[k][0], pix[k][1]] = 1 + k
M0 = M[rpad + xp, rpad + yp]
M0 = np.reshape(M0, xm.shape)
return M0, pix
def compute_sliding_minmax(array, Window, sig=2):
if sig > 0:
Flow = filters.gaussian_filter1d(array, sig)
else:
Flow = array
Flow = filters.minimum_filter1d(Flow, Window, mode='wrap')
Flow = filters.maximum_filter1d(Flow, Window, mode='wrap')
return Flow
def filtermax(f, maxfiltsize=10):
"""Apply maximum filter to the spectrum to ignore deeper fluxes of absorption lines."""
# Maximum filter to ignore deeper fluxes of absorption lines
f_maxfilt = maximum_filter1d(f, size=maxfiltsize)
# Find points selected by maximum filter
idxmax = np.array([i for i in range(len(f)) if f[i] - f_maxfilt[i] == 0.])
return f_maxfilt, idxmax
def center_baseline(V, sigma=100, window=500):
''' centers V so the baseline is at 0 '''
Flow = filters.gaussian_filter(V.T, [0.,sigma])
Flow = filters.minimum_filter1d(Flow, window)
Flow = filters.maximum_filter1d(Flow, window)
V_centered = (V.T - Flow).T
#V_centered = (V.T - Flow.mean(axis=1)[:,np.newaxis]).T
return V_centered
def find_reps(y, threshold, open_size, close_size):
"""
From the Y profile of a barbell's path, determine the concentric phase of each rep.
The algorithm is as follows:
1. Compute the gradient (dy/dt) of the Y motion
2. Binarize the gradient signal by a minimum threshold value to eliminate noise.
3. Perform 1D opening by open_size using a minimum then maximum filter in series.
4. Perform 1D closing by close_size using a maximum then minimum filter in series.
The result is a step function that is true for every time point that the concentric (+Y) phase of the rep
is being performed.
Parameters
----------
y : (N) array
Y component of the motion of the barbell path.
threshold : float
Miniumum acceptable value of the gradient (dY/dt) to indicate a rep.
Increasing this can help eliminate noise, but may cause a small delay after a rep begins to when it is
counted, therefore underestimating the time to complete a rep.
open_size : int
Minimum threshold of length of time that it takes to complete a rep (in frames).
Increase this if there are false positive spikes in the rep step signal that are small in width.
close_size : int
Minimum length of time that could be between reps.
Increase this if there are false breaks between reps that should be continuous.
Returns
-------
(N) array
Step signal representing when reps are performed. (1 indicates concentric phase of rep, 0 indicates no rep).
"""
ygrad = np.gradient(y)
rep_signal = np.where(ygrad > threshold, 1, 0)
# Opening to remove spikes
rep_signal = maximum_filter1d(minimum_filter1d(rep_signal, open_size),
open_size)
# Closing to connect movements (as in the step up from the jerk)
rep_signal = minimum_filter1d(maximum_filter1d(rep_signal, close_size),
close_size)
return rep_signal
def Synch_framestart(signal, L, spread=300, threshold=0.8):
P = Synch_P(signal, L)
R = Synch_R(signal, L)
R = maximum_filter1d(R, spread)
M = ((np.abs(P))**2) / (R**2)
start, end = longest_block((M > threshold), 0)[:2]
frame_start = int((start + end) / 2)
freq_offset = np.mean(np.angle(P[start:end]))
return frame_start, freq_offset, end
def connectedRegion(mLam, rsmall, d0):
mLam0 = np.zeros(rsmall.shape)
mLam1 = np.zeros(rsmall.shape)
# non-zero lam's
mLam0[rsmall<=d0] = mLam>0
mLam1[rsmall<=d0] = mLam
mmax = mLam1.argmax()
mask = np.zeros(rsmall.size)
mask[mmax] = 1
mask = np.resize(mask, (2*d0+1, 2*d0+1))
for m in range(int(np.ceil(mask.shape[0]/2))):
mask = filters.maximum_filter1d(mask, 3, axis=0) * mLam0
mask = filters.maximum_filter1d(mask, 3, axis=1) * mLam0
#mask = filters.maximum_filter(mask, footprint=rsmall<=1.5) * mLam0
mLam *= mask[rsmall<=d0]
return mLam
def smoothingInput(self):
print(self.edge_det_window, self.smoothing_window, self.smoothing_var)
depths = np.array(self.data_list[0][self.fileIndex])
smoothing_filter = gaussian(self.smoothing_window, self.smoothing_var) / \
np.sum(gaussian(self.smoothing_window, self.smoothing_var))
union_depths = maximum_filter1d(
depths, self.edge_det_window) ## MAX POOL to extract boarder lines
final_depth = np.convolve(union_depths, smoothing_filter,
mode='same') ## Smoothing boarder lines
return final_depth
def smooth_covars(cov, size):
T = cov.shape[0]
dX = cov.shape[1]
traces = np.empty([T])
for t in range(T):
traces[t] = np.trace(cov[t])
smoothed_traces = maximum_filter1d(traces, size)
for t in range(T):
if smoothed_traces[t] > traces[t]:
cov[t] += np.eye(dX) * (smoothed_traces[t] - traces[t]) / dX
def preprocess(F: np.ndarray,
baseline: str,
win_baseline: float,
sig_baseline: float,
fs: float,
prctile_baseline: float = 0.9) -> np.ndarray:
""" preprocesses fluorescence traces for spike deconvolution
baseline-subtraction with window 'win_baseline'
Parameters
----------------
F : float, 2D array
size [neurons x time], in pipeline uses neuropil-subtracted fluorescence
baseline : str
setting that describes how to compute the baseline of each trace
win_baseline : float
window (in seconds) for max filter
sig_baseline : float
width of Gaussian filter in seconds
fs : float
sampling rate per plane
prctile_baseline : float
percentile of trace to use as baseline if using `constant_prctile` for baseline
Returns
----------------
F : float, 2D array
size [neurons x time], baseline-corrected fluorescence
"""
win = int(win_baseline * fs)
if baseline == 'maximin':
Flow = filters.gaussian_filter(F, [0., sig_baseline])
Flow = filters.minimum_filter1d(Flow, win)
Flow = filters.maximum_filter1d(Flow, win)
elif baseline == 'constant':
Flow = filters.gaussian_filter(F, [0., sig_baseline])
Flow = np.amin(Flow)
elif baseline == 'constant_prctile':
Flow = np.percentile(F, prctile_baseline, axis=1)
Flow = np.expand_dims(Flow, axis=1)
else:
Flow = 0.
F = F - Flow
return F
def _make_noise_gradient_color(grad):
"""
Make a noise gradient color.
TODO: Improve noise gradient quality.
Example:
Descriptor(b'Grdn'){
'Nm ': 'Custom\x00',
'GrdF': (b'GrdF', b'ClNs'),
'ShTr': False,
'VctC': False,
'ClrS': (b'ClrS', b'RGBC'),
'RndS': 3650322,
'Smth': 2048,
'Mnm ': [0, 0, 0, 0],
'Mxm ': [0, 100, 100, 100]
}
"""
from scipy.ndimage.filters import maximum_filter1d, uniform_filter1d
logger.debug('Noise gradient is not accurate.')
roughness = grad.get(Key.Smoothness).value / 4096. # Larger is sharper.
maximum = np.array([x.value for x in grad.get(Key.Maximum)],
dtype=np.float32)
minimum = np.array([x.value for x in grad.get(Key.Minimum)],
dtype=np.float32)
seed = grad.get(Key.RandomSeed).value
rng = np.random.RandomState(seed)
Y = rng.binomial(1, .5, (256, len(maximum))).astype(np.float32)
size = max(1, int(roughness))
Y = maximum_filter1d(Y, size, axis=0)
Y = uniform_filter1d(Y, size * 64, axis=0)
Y = Y / np.max(Y, axis=0)
Y = ((maximum - minimum) * Y + minimum) / 100.
X = np.linspace(0, 1, 256, dtype=np.float32)
if grad.get(Key.ShowTransparency):
G = interpolate.interp1d(X,
Y[:, :-1],
axis=0,
bounds_error=False,
fill_value=(Y[0, :-1], Y[-1, :-1]))
Ga = interpolate.interp1d(X,
Y[:, -1],
axis=0,
bounds_error=False,
fill_value=(Y[0, -1], Y[-1, -1]))
else:
G = interpolate.interp1d(X,
Y[:, :3],
axis=0,
bounds_error=False,
fill_value=(Y[0, :3], Y[-1, :3]))
Ga = None
return G, Ga
def validate_signal(t, y, t_ref, y_ref, num=1000, dx=20, dy=0.1):
""" Validate a signal y(t) against a reference signal y_ref(t_ref) by creating a band
around y_ref and finding the values in y outside the band
Parameters:
t time of the signal
y values of the signal
t_ref time of the reference signal
y_ref values of the reference signal
num number of samples for the band
dx horizontal width of the band in samples
dy vertical distance of the band to y_ref
Returns:
t_band time values of the band
y_min lower limit of the band
y_max upper limit of the band
i_out indices of the values in y outside the band
"""
from scipy.ndimage.filters import maximum_filter1d, minimum_filter1d
# re-sample the reference signal into a uniform grid
t_band = np.linspace(start=t_ref[0], stop=t_ref[-1], num=num)
# sort out the duplicate samples before the interpolation
m = np.concatenate(([True], np.diff(t_ref) > 0))
y_band = np.interp(x=t_band, xp=t_ref[m], fp=y_ref[m])
y_band_min = np.min(y_band)
y_band_max = np.max(y_band)
# calculate the width of the band
if y_band_min == y_band_max:
w = 0.5 if y_band_min == 0 else np.abs(y_band_min) * dy
else:
w = (y_band_max - y_band_min) * dy
# calculate the lower and upper limits
y_min = minimum_filter1d(input=y_band, size=dx) - w
y_max = maximum_filter1d(input=y_band, size=dx) + w
# find outliers
y_min_i = np.interp(x=t, xp=t_band, fp=y_min)
y_max_i = np.interp(x=t, xp=t_band, fp=y_max)
i_out = np.logical_or(y < y_min_i, y > y_max_i)
# do not count outliers outside the t_ref
i_out = np.logical_and(i_out, t > t_band[0])
i_out = np.logical_and(i_out, t < t_band[-1])
return t_band, y_min, y_max, i_out
def preprocessFeatureMat(X, Lfilt, logX=False, logXblur=False, capXblur=True, **sink): # if not capXblur: # X = localMaxFilterSimMat(X) # X = localMaxFilterSimMat(X) # Lfilt *= 2 # TODO remove after test featureMeans = np.mean(X, axis=1).reshape((-1, 1)) if logX and logXblur: X *= -np.log2(featureMeans) # variable encoding costs for rows Xblur = filterSimMat(X, Lfilt, 'hamming', scaleFilterMethod='max1') if logX and not logXblur: Xblur = filterSimMat(X, Lfilt, 'hamming', scaleFilterMethod='max1') X *= -np.log2(featureMeans) if not logX and logXblur: Xblur = filterSimMat(X, Lfilt, 'hamming', scaleFilterMethod='max1') Xblur *= np.log2(featureMeans) if not logX and not logXblur: Xblur = filterSimMat(X, Lfilt, 'hamming', scaleFilterMethod='max1') # Xblur = filterSimMat(X, Lfilt, 'flat', scaleFilterMethod='max1') if capXblur: # don't make long stretches also have large values maxima = filters.maximum_filter1d(Xblur, Lfilt // 2, axis=1, mode='constant') # maxima = filters.maximum_filter1d(Xblur, Lfilt, axis=1, mode='constant') Xblur[maxima > 0] /= maxima[maxima > 0] # print "preprocessFeatureMat(): max value in Xblur: ", np.max(Xblur) # 1.0 # import sys # sys.exit() # Xblur = np.minimum(Xblur, 1.) # plt.figure() # viz.imshowBetter(X) # plt.figure() # viz.imshowBetter(Xblur) # have columns be adjacent in memory X = np.asfortranarray(X) Xblur = np.asfortranarray(Xblur) # assert(np.all((X > 0.) <= (Xblur > 0.))) assert(np.all(np.sum(X, axis=1) > 0)) assert(np.all(np.sum(Xblur, axis=1) > 0)) # if np.max(X) > 1.: # print "X min" print "preprocessFeatureMat(): X shape, logX, logXblur", X.shape, logX, logXblur print "preprocessFeatureMat(): Lfilt", Lfilt print "preprocessFeatureMat(): X min, max", X.min(), X.max() print "preprocessFeatureMat(): Xblur min, max", Xblur.min(), Xblur.max() # import sys # sys.exit() return X, Xblur
def filter1d_same(a: np.ndarray, W: int, max_or_min: str, fillna=np.nan):
out_dtype = np.full(0, fillna).dtype
hW = (W - 1) // 2 # Half window size
if max_or_min == 'max':
out = maximum_filter1d(a, size=W, origin=hW)
else:
out = minimum_filter1d(a, size=W, origin=hW)
if out.dtype is out_dtype:
out[:W - 1] = fillna
else:
out = np.concatenate((np.full(W - 1, fillna), out[W - 1:]))
return out
def process_cut(spect, stddevs=3, ignore=2):
from scipy.ndimage.filters import maximum_filter1d
# "loudness" curve
loud = np.log(np.sum(np.exp(spect), axis=1))
# normieren
nloud = (loud - np.mean(loud)) / np.std(loud)
lowloud = nloud < -stddevs
# schauen, ob innerhalb von 3 stddevs, Klicks darin (bis zu 2 Frames lang) ignorieren.
fltloud = ~maximum_filter1d(lowloud, ignore + 1)
where_ok = np.where(fltloud)[0]
cut_front = np.min(where_ok)
cut_back = np.max(where_ok)
return cut_front, cut_back + 1
def _gradient_nms(self, accumulated_grad, win_size=3):
'''
Non-maximum suppression to find local maximum of accumulated gradient.
@accumulated_grad:
np.array, input accumulated gradient.
@win_size:
int, sliding window length. It decides how much you refer to neighbor field values.
@return:
list, local maximum accumulated gradient indexs.
'''
indexs = []
maximas = maximum_filter1d(accumulated_grad, win_size)
for i in range(len(accumulated_grad)):
if accumulated_grad[i] > 0 and abs(accumulated_grad[i] -
maximas[i]) < 1e-6:
indexs.append(i)
return indexs
def preprocess(F,ops):
sig = ops['sig_baseline']
win = int(ops['win_baseline']*ops['fs'])
if ops['baseline']=='maximin':
Flow = filters.gaussian_filter(F, [0., sig])
Flow = filters.minimum_filter1d(Flow, win)
Flow = filters.maximum_filter1d(Flow, win)
elif ops['baseline']=='constant':
Flow = filters.gaussian_filter(F, [0., sig])
Flow = np.amin(Flow)
elif ops['baseline']=='constant_prctile':
Flow = np.percentile(F, ops['prctile_baseline'], axis=1)
Flow = np.expand_dims(Flow, axis = 1)
else:
Flow = 0.
F = F - Flow
return F
def generate_Lip_Tragectory(phrase):
A = "espeak -z -s 80 -v female5 -w test.wav "
A = A + "'" + phrase + "'"
#os.system("espeak -z -s 80 -v female5 -w test.wav 'Hey, why no one is looking at me? I feel neglected. I feel it! I am afraid!' ")
os.system(A)
samplerate, data = wavfile.read('test.wav')
dt = 1 / float(samplerate)
times = np.arange(len(data)) / float(samplerate)
N = len(times)
max_data = maximum_filter1d(data, size=1000)
max_data = gaussian_filter(max_data, sigma=100)
max_Amplitude = 10
Amplitude = np.round(max_Amplitude * (max_data / np.max(max_data)))
Extrema = argrelextrema(max_data, np.less_equal, order=100)[0]
Amplitude = Amplitude[Extrema]
Sleep_Time = []
for i in range(len(Extrema)):
if (i + 1 < len(Extrema)):
Sleep_Time.append(dt * (times[Extrema[i + 1]] - times[Extrema[i]]))
return np.array(Amplitude), np.array(Sleep_Time), Extrema
def preprocess(F, ops):
""" preprocesses fluorescence traces for spike deconvolution
baseline-subtraction with window 'win_baseline'
Parameters
----------------
F : float, 2D array
size [neurons x time], in pipeline uses neuropil-subtracted fluorescence
ops : dictionary
'baseline', 'win_baseline', 'sig_baseline', 'fs',
(optional 'prctile_baseline' needed if ops['baseline']=='constant_prctile')
Returns
----------------
F : float, 2D array
size [neurons x time], baseline-corrected fluorescence
"""
sig = ops['sig_baseline']
win = int(ops['win_baseline'] * ops['fs'])
if ops['baseline'] == 'maximin':
Flow = filters.gaussian_filter(F, [0., sig])
Flow = filters.minimum_filter1d(Flow, win)
Flow = filters.maximum_filter1d(Flow, win)
elif ops['baseline'] == 'constant':
Flow = filters.gaussian_filter(F, [0., sig])
Flow = np.amin(Flow)
elif ops['baseline'] == 'constant_prctile':
Flow = np.percentile(F, ops['prctile_baseline'], axis=1)
Flow = np.expand_dims(Flow, axis=1)
else:
Flow = 0.
F = F - Flow
return F
# Compute errors.
max_errors = []
av_errors = []
for color in range(0, 3):
max_error = np.zeros(6)
av_error = np.zeros(6)
for c in range(0, num_checkers):
# Get min. absolute diff to envelopes.
env_diff = np.minimum(np.fabs(checker_int[color][c, :] - envelopes[color][:, 0]),
np.fabs(checker_int[color][c, :] - envelopes[color][:, 2]))
# Reject values within vincinity of envelopes.
reject_mask = img_filters.maximum_filter1d(np.int_(env_diff <= 0.02), 7)
if np.min(reject_mask) != 1:
int_vals = checker_int[color][c, :];
int_vals = int_vals[reject_mask != 1]
median = np.median(int_vals)
max_error[c] = np.max(np.fabs(int_vals - median))
av_error[c] = np.std(int_vals)
max_errors.append(max_error)
av_errors.append(av_error)
color_name = [ 'red', 'green', 'blue' ]
print "Average error: "
for color in range(0, 3):
def detect(self, threshold, combine=0.03, pre_avg=0.15, pre_max=0.01,
post_avg=0, post_max=0.05, delay=0):
"""
Detects the onsets.
:param threshold: threshold for peak-picking
:param combine: only report 1 onset for N seconds
:param pre_avg: use N seconds past information for moving average
:param pre_max: use N seconds past information for moving maximum
:param post_avg: use N seconds future information for moving average
:param post_max: use N seconds future information for moving maximum
:param delay: report the onset N seconds delayed
In online mode, post_avg and post_max are set to 0.
Implements the peak-picking method described in:
"Evaluating the Online Capabilities of Onset Detection Methods"
Sebastian Böck, Florian Krebs and Markus Schedl
Proceedings of the 13th International Society for Music Information
Retrieval Conference (ISMIR), 2012
"""
# online mode?
if self.online:
post_max = 0
post_avg = 0
# convert timing information to frames
pre_avg = int(round(self.fps * pre_avg))
pre_max = int(round(self.fps * pre_max))
post_max = int(round(self.fps * post_max))
post_avg = int(round(self.fps * post_avg))
# convert to seconds
combine /= 1000.
delay /= 1000.
# init detections
self.detections = []
# moving maximum
max_length = pre_max + post_max + 1
max_origin = int(np.floor((pre_max - post_max) / 2))
mov_max = maximum_filter1d(self.activations, max_length,
mode='constant', origin=max_origin)
# moving average
avg_length = pre_avg + post_avg + 1
avg_origin = int(np.floor((pre_avg - post_avg) / 2))
mov_avg = uniform_filter1d(self.activations, avg_length,
mode='constant', origin=avg_origin)
# detections are activation equal to the moving maximum
detections = self.activations * (self.activations == mov_max)
# detections must be greater or equal than the mov. average + threshold
detections *= (detections >= mov_avg + threshold)
# convert detected onsets to a list of timestamps
detections = np.nonzero(detections)[0].astype(np.float) / self.fps
# shift if necessary
if delay != 0:
detections += delay
# always use the first detection and all others if none was reported
# within the last `combine` seconds
if detections.size > 1:
# filter all detections which occur within `combine` seconds
combined_detections = detections[1:][np.diff(detections) > combine]
# add them after the first detection
self.detections = np.append(detections[0], combined_detections)
else:
self.detections = detections