def dem_ditch_detection(arr):
"""
DEM ditch enhancement.
"""
newArr = arr.copy()
maxArr = gf(arr, np.amax, footprint=create_circular_mask(30))
minArr = gf(arr, np.amin, footprint=create_circular_mask(10))
meanArr = gf(arr, np.median, footprint=create_circular_mask(10))
minMaxDiff = arr.copy()
for i in range(len(arr)):
for j in range(len(arr[i])):
if minArr[i][j] < maxArr[i][j] - 3:
minMaxDiff[i][j] = 1
else:
minMaxDiff[i][j] = 0
closing = morph.binary_closing(minMaxDiff,
structure=create_circular_mask(10))
closing2 = morph.binary_closing(closing,
structure=create_circular_mask(10))
for i in range(len(arr)):
for j in range(len(arr[i])):
if arr[i][j] < meanArr[i][j] - 0.1:
newArr[i][j] = meanArr[i][j] - arr[i][j]
else:
newArr[i][j] = 0
if closing2[i][j] == 1:
newArr[i][j] = 0
return newArr
def slopeNonDitchAmplification(arr):
newArr = arr.copy()
arr = gf(arr, np.nanmedian, footprint=create_circular_mask(35))
for i in range(len(arr)):
for j in range(len(arr[i])):
if arr[i][j] < 8:
newArr[i][j] = 0
elif arr[i][j] < 9:
newArr[i][j] = 20
elif arr[i][j] < 10:
newArr[i][j] = 25
elif arr[i][j] < 11:
newArr[i][j] = 30
elif arr[i][j] < 13:
newArr[i][j] = 34
elif arr[i][j] < 15:
newArr[i][j] = 38
elif arr[i][j] < 17:
newArr[i][j] = 42
elif arr[i][j] < 19:
newArr[i][j] = 46
elif arr[i][j] < 21:
newArr[i][j] = 50
else:
newArr[i][j] = 55
return gf(newArr, np.nanmean, footprint=create_circular_mask(15))
def skyViewNonDitchAmplification(arr):
arr = gf(arr, np.nanmedian, footprint=create_circular_mask(25))
newArr = arr.copy()
for i in range(len(arr)):
for j in range(len(arr[i])):
if arr[i][j] < 0.92:
newArr[i][j] = 46
elif arr[i][j] < 0.93:
newArr[i][j] = 37
elif arr[i][j] < 0.94:
newArr[i][j] = 29
elif arr[i][j] < 0.95:
newArr[i][j] = 22
elif arr[i][j] < 0.96:
newArr[i][j] = 16
elif arr[i][j] < 0.97:
newArr[i][j] = 11
elif arr[i][j] < 0.98:
newArr[i][j] = 7
elif arr[i][j] < 0.985:
newArr[i][j] = 4
elif arr[i][j] < 0.99:
newArr[i][j] = 2
else:
newArr[i][j] = 1
return gf(newArr, np.nanmean, footprint=create_circular_mask(10))
def hpmfFilter(arr):
binary = arr.copy()
for i in range(len(arr)):
for j in range(len(arr[i])):
if arr[i][j] < 1000000 and arr[i][j] > -1000000:
binary[i][j] = 1000000000
else:
binary[i][j] = 0
mean = gf(gf(gf(gf(binary, np.amax, footprint=create_circular_mask(1)), np.amax, footprint=create_circular_mask(1)), np.median, footprint=create_circular_mask(2)), np.nanmean, footprint=create_circular_mask(5))
reclassify = mean.copy()
for i in range(len(mean)):
for j in range(len(mean[i])):
if mean[i][j] < 1:
reclassify[i][j] = 0
elif mean[i][j] < 30000000:
reclassify[i][j] = 1
elif mean[i][j] < 70000000:
reclassify[i][j] = 2
elif mean[i][j] < 100000000:
reclassify[i][j] = 50
elif mean[i][j] < 200000000:
reclassify[i][j] = 75
elif mean[i][j] < 500000000:
reclassify[i][j] = 100
elif mean[i][j] < 800000000:
reclassify[i][j] = 300
elif mean[i][j] < 1000000000:
reclassify[i][j] = 600
else:
reclassify[i][j] = 1000
return gf(reclassify, np.nanmean, footprint=create_circular_mask(7))
def estimate_sensitivity(self):
print("opening mosaic...")
exposure = self.raw_exposure_ext().data
variance = self.raw_variance_ext().data
significance = self.raw_significance_ext().data
intensity = self.raw_intensity_ext().data
nce = self.raw_significance_ext().data
mask = exposure > exposure.max() / self.exposure_fraction_cut
from scipy.ndimage.filters import gaussian_filter as gf
rms = (gf(intensity ** 2, 30) - gf(intensity, 30) ** 2) ** 0.5
fits.PrimaryHDU(rms).writeto(self.hostdir+self.out_prefix+"rms_%i.fits" % self.i_band, overwrite=True)
total_rms = std(significance[mask])
def avg_nonan(a):
return average(a[where(~isnan(a))])
#e1, e2 = self.erange(self.i_band)
statdict = dict(
rms=total_rms,
rms_min=rms.min(),
variance_min=variance[variance > 0].min() ** 0.5,
exposure_max=exposure.max(),
significance_max=significance.max(),
)
self.save_statistics(statdict)
def plotCenters(self):
self.p1.clear()
self.p2.clear()
for r in self.rois:
centers = np.copy(r['centers'])
#self.p1.plot(y=centers[:, 0] / np.average(centers[:, 0]), pen=r['roi'].pen)
#self.p2.plot(y=centers[:, 1] / np.average(centers[:, 1]), pen=r['roi'].pen)
self.p1.plot(y=gf(centers[:, 0], self.slider.value()), pen=r['roi'].pen)
self.p2.plot(y=gf(centers[:, 1], self.slider.value()), pen=r['roi'].pen)
def plotCenters(self):
self.p1.clear()
self.p2.clear()
for r in self.rois:
centers = np.copy(r['centers'])
#self.p1.plot(y=centers[:, 0] / np.average(centers[:, 0]), pen=r['roi'].pen)
#self.p2.plot(y=centers[:, 1] / np.average(centers[:, 1]), pen=r['roi'].pen)
self.p1.plot(y=gf(centers[:, 0], self.slider.value()),
pen=r['roi'].pen)
self.p2.plot(y=gf(centers[:, 1], self.slider.value()),
pen=r['roi'].pen)
def filterf(self):
"""Gaussian filtering of velocity """
self._obj["u"] = xr.DataArray(
gf(self._obj["u"].values, [1, 1, 0]), dims=("x", "y", "t")
)
self._obj["v"] = xr.DataArray(
gf(self._obj["v"].values, [1, 1, 0]), dims=("x", "y", "t")
)
return self._obj
def auto_bright_nonlin(img,
epochs,
transform_factor=0.5,
sigma=0.8,
mean_thresh=2,
mean_reduction=0.9):
"""
TODO: Transform multiple images simultaneously (e.g. Before and After) per Roy's request
Try sliding window approach and maximize entropy for each window. Windows can't be too small, or too large.
:param img: numpy array/obj of the image you want to transform
:param epochs: hyperparameter for number of transformations
:param transform_factor: hyperparameter for rate of exponential transformation
:param sigma: gaussian filter hyperparameter
:param mean_thresh: hyperparameter controlling sensitivity of intensity cutoff
:param mean_reduction: hyperparameter for reducing the lowest intensity pixels
:return best_img: maximum entropy image
"""
# normalize pixels between 0 and 1
img = np.array(img).astype(np.float)
img *= 1 / np.max(img)
# calculate initial entropy of the image
counts, bins = np.histogram(img)
count_frac = [count / np.sum(counts) for count in counts]
d = dit.Distribution(list(map(str, range(len(counts)))), count_frac)
entropy_loss = [entropy(d)]
d_entropy = 1 # arbitrary
imgs = [
img
] # holds all images so that we can choose the one with the best entropy
for i in range(epochs):
# remove low intensity pixels
img[img <= mean_thresh * np.mean(img)] *= mean_reduction
img = gf(img, sigma=sigma)
img = img**(1 - (transform_factor * d_entropy))
img[img == np.inf] = 1 # clip infities at 1
imgs.append(img)
counts, bins = np.histogram(img)
count_frac = [count / np.sum(counts) for count in counts]
d = dit.Distribution(list(map(str, range(len(counts)))), count_frac)
entropy_loss.append(entropy(d))
d_entropy = entropy_loss[-1] - entropy_loss[-2]
if i % 10 == 0:
print('Finished: ', 100 * i / epochs, '%')
print('Best entropy: ', max(entropy_loss), 'at ix ',
entropy_loss.index(max(entropy_loss)))
best_img = imgs[entropy_loss.index(max(entropy_loss))]
best_img = gf(best_img, sigma=sigma)
return best_img, entropy_loss
def findminmax(self, data, rng=50, start=0, ignore=10, dtype='height'):
""" find local min & max.
"""
foo = argrelextrema(gf(data, 5), np.less_equal, order=rng)[0]
vall = foo[np.where((np.roll(foo, 1) - foo) != -1)[0]]
vall = vall[vall >= ignore][start:]
foo = argrelextrema(gf(data, 5), np.greater_equal, order=rng)[0]
peak = foo[np.where((np.roll(foo, 1) - foo) != -1)[0]]
peak = peak[peak >= ignore][start:]
if dtype == 'height':
return [peak, vall]
elif dtype == 'depth':
peakvalue = gf(data, 5)[peak]
vallvalue = gf(data, 5)[vall]
return [peak, vall, peakvalue, vallvalue]
def circular_filter(image_data, radius):
kernel = np.zeros((2 * radius + 1, 2 * radius + 1))
y, x = np.ogrid[-radius:radius + 1, -radius:radius + 1]
mask = x**2 + y**2 <= radius**2
kernel[mask] = 1
filtered_image = gf(image_data, np.median, footprint=kernel)
return filtered_image
def gau_smooth(arr0,typ='single',krn=75.0/4.0,verbose=False):
import numpy as np
from scipy.ndimage.filters import gaussian_filter1d as gf1d
from scipy.ndimage.filters import gaussian_filter as gf
N = arr0.ndim
ktyp = type(krn)
modes = ['reflect','wrap','wrap']
if ktyp==float:
krn = [krn,krn,krn]
if typ=='single':
ret = np.zeros(arr0.shape)
for i in range(3):
if verbose:
print('Smoothing type: wrap, component: {}'.format(i))
ret[i] = gf(arr0[i],sigma=krn,mode='wrap')
return ret
elif typ=='piecewise':
for i in range(3):
if N==3:
cax = i
if N==4:
cax = i+1
if verbose:
print('Axis = {}; k = {}, mode = {}'.format(cax,krn[i],modes[i]))
clab = 'arr{}'.format(i)
nlab = 'arr{}'.format(i+1)
if verbose:
print(clab,nlab)
locals()[nlab] = gf1d(locals()[clab],axis=cax,sigma=krn[i],mode=modes[i])
if verbose:
print('Returning {}'.format(nlab))
return locals()[nlab]
def read_hyper_clean(fpath, fname=None):
""" Read a clean hyperspectral scan. """
# -- read in the scan
print("reading and converting to float...")
t0 = time.time()
cube = read_hyper(fpath, fname)
cube.data = cube.data.astype(float)
elapsed_time(t0)
# -- read in the offset
oname = os.path.split(cube.filename)[-1].replace(".raw", "_off.npy")
opath = os.path.join("..", "output", "scan_offsets", oname)
try:
off = np.load(opath)
except:
print("offset file {0} not found!!!\n Generating...".format(opath))
t0 = time.time()
off = np.median(gf(cube.data, (0, 1, 1)), 2, keepdims=True)
np.save(opath, off)
elapsed_time(t0)
# -- remove offset
print("removing offset...")
t0 = time.time()
cube.data -= off
elapsed_time(t0)
return cube
def evaluation(self, exeno, err=[]):
""" exercise performance evaluation
"""
fig = plt.figure(1)
ax = fig.add_subplot(111)
if exeno == 1:
ax.plot(gf(self.breath_list, 10), color='g')
if len(self.ngframe) != 0:
for i in self.ngframe:
y1 = self.breath_list[i]
if y1 < 15000:
y2 = y1+10000
else:
y2 = y1-10000
ax.annotate('Not deep breath', xy=(i, y1+10), xytext=(i, y2),arrowprops=dict(facecolor='red', shrink=0.05),)
plt.title('Breath in and out')
fig.savefig('output/bio.jpg')
elif exeno == 2:
ax.plot(self.hstate[:,0]*20000, color='b')
ax.plot(self.hstate[:,1]*20000-20000, color='r')
# ax.plot(gf(self.breath_list, 10)/self.breath_list[0]*2, color='g')
ax.plot(gf(self.breath_list, 10), color='g')
if len(self.ngframe) != 0:
for i in self.ngframe:
y1 = self.breath_list[i]#/self.breath_list[0]*2
y2 = 1.5*10000
ax.annotate('breath not deep enough', xy=(i, y1), xytext=(i, y2),arrowprops=dict(facecolor='red', shrink=0.05),)
if len(self.missingbreath) != 0:
for i in self.missingbreath:
x = sum(i)/2
y1 = self.breath_list[x]#/self.breath_list[0]*2
y2 = 1*10000
ax.annotate('missing breath', xy=(x, y1), xytext=(x, y2),arrowprops=dict(facecolor='green', shrink=0.05),)
plt.title('Breath in and out & hands open and close')
fig.savefig('output/biohoc.jpg')
plt.show()
# pdb.set_trace()
plt.close(fig)
print('\nevaluation:')
if len(self.error) != 0:
for i in self.error:
print i
print('\n')
else:
print('perfect !!\n')
def handle(self, *args, **options):
# vars
experiment_name = options['expt']
series_name = options['series']
t = options['t']
R = 1
delta_z = -8
# sigma = 5
if experiment_name!='' and series_name!='':
experiment = Experiment.objects.get(name=experiment_name)
series = experiment.series.get(name=series_name)
# select composite
composite = series.composites.get()
# load gfp
gfp_gon = composite.gons.get(t=t, channel__name='0')
gfp_start = exposure.rescale_intensity(gfp_gon.load() * 1.0)
print('loaded gfp...')
# load bf
bf_gon = composite.gons.get(t=t, channel__name='1')
bf = exposure.rescale_intensity(bf_gon.load() * 1.0)
print('loaded bf...')
for sigma in [0, 5, 10, 20]:
gfp = gf(gfp_start, sigma=sigma) # <<< SMOOTHING
for level in range(gfp.shape[2]):
print('level {} {}...'.format(R, level))
gfp[:,:,level] = convolve(gfp[:,:,level], np.ones((R,R)))
# initialise images
Z = np.zeros(composite.series.shape(d=2), dtype=int)
Zmean = np.zeros(composite.series.shape(d=2))
Zbf = np.zeros(composite.series.shape(d=2))
Z = np.argmax(gfp, axis=2) + delta_z
# outliers
Z[Z<0] = 0
Z[Z>composite.series.zs-1] = composite.series.zs-1
for level in range(bf.shape[2]):
print('level {}...'.format(level))
bf_level = bf[:,:,level]
Zbf[Z==level] = bf_level[Z==level]
Zmean = 1 - np.mean(gfp, axis=2) / np.max(gfp, axis=2)
imsave('zbf_R-{}_sigma-{}_delta_z{}.png'.format(R, sigma, delta_z), Zbf)
# plt.imshow(Zbf, cmap='Greys_r')
# plt.show()
else:
print('Please enter an experiment')
def convol_spec(lam, spec, fwhm):
'''Convolves a spectrum with a Gaussina ILS with conversion from a FWHM.
'''
inter = (lam[1] - lam[0] + lam[-1] - lam[-2]) / 2.
std = fwhm / 2. / np.sqrt(2. * np.log(2.))
pix_std = std / inter
G = gf(spec, pix_std)
return G
def pre_smooth(Kbody, shape, sigma=3):
for i in Kbody.keys():
Mean = np.tile(
np.mean(Kbody[i], axis=1).reshape((3, -1)), (1, shape[1]))
Std = np.tile(np.std(Kbody[i], axis=1).reshape((3, -1)), (1, shape[1]))
Kbody[i] = gf((Kbody[i] - Mean) / Std, sigma, axis=1) * Std + Mean
return Kbody
def merge_mice(mice, datadir, sigma=1.5, norm=True, match_baseline_test_sizes=True):
# Given a list of already analyzed mice, combine their data into one image and heatmap.
# Return array: [ [[BASELINE IMG],[BASELINE HEATMAP]], [[TEST IMG],[TEST HEATMAP]] ]
results = []
for mode in [BASELINE, TEST]:
heats = []
pics = []
for mouse in mice:
a = Analysis(mouse, mode, data_directory=datadir)
bg = a.get_background()['image']
tr = a.get_tracking()
heat = tr['heat']
t = np.array(a.get_time())
tdiff = t[1:] - t[:-1]
assert np.std(tdiff) < 0.01
Ts = np.mean(tdiff)
resamp = tr['params'][np.where(tr['params_key']=='resample')]
spf = Ts*resamp
heat *= spf
if norm:
heat = heat/np.sum(heat)
bg = a.crop(bg)
heat = a.crop(heat)
heats.append(heat)
pics.append(bg)
minheight, minwidth = min([np.shape(h)[0] for h in heats]), min([np.shape(h)[1] for h in heats])
for idx,h in enumerate(heats):
heats[idx] = resize(h, (minwidth,minheight))
pics[idx] = resize(pics[idx], (minwidth,minheight))
heat = np.dstack(heats)
img = np.dstack(pics)
img = np.mean(img, axis=2)
avg = np.mean(heat, axis=2)
heat = gf(avg,sigma)
heat = heat/np.max(heat)
results.append([img,heat])
if match_baseline_test_sizes:
heats = [results[BASELINE][HEAT], results[TEST][HEAT]]
pics = [results[BASELINE][IMG], results[TEST][IMG]]
minheight, minwidth = min([np.shape(h)[0] for h in heats]), min([np.shape(h)[1] for h in heats])
for idx,h in enumerate(heats):
heats[idx] = resize(h, (minwidth,minheight))
pics[idx] = resize(pics[idx], (minwidth,minheight))
results[BASELINE][HEAT], results[TEST][HEAT] = heats
results[BASELINE][IMG], results[TEST][IMG] = pics
return results
def customRemoveNoise(arr, radius, threshold, selfThreshold):
newArr = arr.copy()
print("creating maxArr")
maxArr = gf(arr, np.nanmax, footprint=create_circular_mask(radius))
print("maxArr created")
for i in range(len(arr)):
for j in range(len(arr[i])):
if maxArr[i][j] < threshold and arr[i][j] < selfThreshold:
newArr[i][j] *= 0.25
return newArr
def gaussian_action(seq_len, action_bounds, first_zero):
zeros = np.zeros((first_zero, 2))
actions = np.random.normal(0.0, 0.1, size=(seq_len - first_zero, 2))
b = gf(np.array(actions), 10.0, order=0, axis=0)
bias = -b[0]
b += bias
ret = np.concatenate([zeros, b], axis=0)
seq = np.arange(100)
#plt.plot(seq, ret)
#plt.show()
return ret
def _gaussian_blur(feature, width, size, **kwargs):
from scipy.ndimage.filters import gaussian_filter as gf
y = []
for img in np.split(feature, feature.shape[0]):
c = []
for channel in np.split(img, img.shape[-1]):
channel = np.squeeze(channel).astype('float')
c.append(gf(channel, width, mode='constant', truncate=(size // 2) / width))
y.append(np.stack(c, axis=-1))
return np.stack(y)
def conicProbaPostProcessing(arr, maskRadius, threshold):
masks = []
print("creating max mask")
maxArr = gf(arr, np.nanmax, footprint=create_circular_mask(5))
print("max mask created")
for i in range(0, 8):
masks.append(create_conic_mask(maskRadius, i))
newArr = arr.copy()
amountOfUpdated = 0
examinedPoints = 0
for i in range(len(arr)):
print(i)
for j in range(len(arr[i])):
if arr[i][j] < 0.5 and maxArr[i][j] > 0.6:
examinedPoints += 1
trueProba = probaMeanFromMasks(arr, (i, j), masks)
updatePixel = 0
if trueProba[0] > threshold and trueProba[4] > threshold:
updatePixel = trueProba[0] if trueProba[0] > trueProba[4] else trueProba[4]
if trueProba[1] > threshold and trueProba[5] > threshold:
updatePixelAgain = trueProba[1] if trueProba[1] > trueProba[5] else trueProba[5]
if updatePixelAgain > updatePixel:
updatePixel = updatePixelAgain
if trueProba[2] > threshold and trueProba[6] > threshold:
updatePixelAgain = trueProba[2] if trueProba[6] > trueProba[2] else trueProba[6]
if updatePixelAgain > updatePixel:
updatePixel = updatePixelAgain
if trueProba[3] > threshold and trueProba[7] > threshold:
updatePixelAgain = trueProba[3] if trueProba[3] > trueProba[7] else trueProba[7]
if updatePixelAgain > updatePixel:
updatePixel = updatePixelAgain
if updatePixel != 0:
amountOfUpdated += 1
if updatePixel < 0.5:
updatePixel *= 1.4
elif updatePixel < 0.55:
updatePixel *= 1.35
elif updatePixel < 0.6:
updatePixel *= 1.3
elif updatePixel < 0.65:
updatePixel *= 1.25
elif updatePixel < 0.7:
updatePixel *= 1.2
elif updatePixel < 0.75:
updatePixel *= 1.15
elif updatePixel < 0.85:
updatePixel *= 1.1
elif updatePixel < 0.9:
updatePixel *= 1.05
newArr[i][j] = updatePixel
print(examinedPoints)
print(amountOfUpdated)
return newArr
def harris_detector(im, threshold):
#
# usage: python harris.py 'image.png'
#
# threshold = 1e-4
g1 = fspecial_gaussian([9, 9], 1) # Gaussian with sigma_d
g2 = fspecial_gaussian([11, 11], 1.5) # Gaussian with sigma_i
img1 = conv2(im, g1, 'same') # blur image with sigma_d
Ix = conv2(img1, np.array([[-1, 0, 1]]), 'same') # take x derivative
Iy = conv2(img1, np.transpose(np.array([[-1, 0, 1]])),
'same') # take y derivative
# Compute elements of the Harris matrix H
# we can use blur instead of the summing window
Ix2 = conv2(np.multiply(Ix, Ix), g2, 'same')
Iy2 = conv2(np.multiply(Iy, Iy), g2, 'same')
IxIy = conv2(np.multiply(Ix, Iy), g2, 'same')
eps = 2.2204e-16
R = np.divide(
np.multiply(Ix2, Iy2) - np.multiply(IxIy, IxIy), (Ix2 + Iy2 + eps))
# don't want corners close to image border
# R[0:20] = 0 # all columns from the first 15 lines
# R[-21:] = 0 # all columns from the last 15 lines
# R[:, 0:20] = 0 # all lines from the first 15 columns
# R[:, -21:] = 0 # all lines from the last 15 columns
R[0:29] = 0 # all columns from the first 15 lines
R[-30:] = 0 # all columns from the last 15 lines
R[:, 0:29] = 0 # all lines from the first 15 columns
R[:, -30:] = 0 # all lines from the last 15 columns
# non-maxima suppression within 3x3 windows
Rmax = gf(R, np.max, footprint=np.ones((3, 3)))
Rmax[Rmax != R] = 0 # suppress non-max
v = Rmax[Rmax != 0]
Rmax[Rmax < threshold] = 0
y, x = np.nonzero(Rmax)
# # show 'em
# for xp, yp in zip(x, y):
# rr, cc = draw.circle_perimeter(yp, xp, radius=6, shape=im.shape)
# im[rr, cc] = 1
# plt.imshow(im)
# plt.show()
pointlist = []
for vi, xi, yi in zip(v, x, y):
pointlist.append(CorresPoint(vi, xi, yi))
return np.array(pointlist)
def local_minmax(self, seq1, seq2, th, minmax_str, rng=15, scale=3):
""" finding local min or max depending on the argument minmax
"""
breath_list = gf(self.breath_list, scale)
if minmax_str == 'min':
minmax = np.less
elif minmax_str == 'max':
minmax = np.greater
pts = argrelextrema(breath_list, minmax, order=rng)[0]
if len(pts) != 0:
if (pts[-1] - seq1[-1][0] >= rng and minmax(breath_list[pts[-1]], th) and
pts[-1] > seq2[-1, 0]):
seq1 = np.vstack((seq1, np.array([pts[-1], breath_list[pts[-1]]])))
return np.atleast_2d(seq1)
def impoundmentAmplification(arr):
newArr = arr.copy()
for i in range(len(arr)):
for j in range(len(arr[i])):
if arr[i][j] == 0:
newArr[i][j] = 0
elif arr[i][j] < 1000000000:
newArr[i][j] = 5
elif arr[i][j] < 1010000000:
newArr[i][j] = 50
elif arr[i][j] < 1020000000:
newArr[i][j] = 100
elif arr[i][j] < 1030000000:
newArr[i][j] = 1000
elif arr[i][j] < 1040000000:
newArr[i][j] = 10000
elif arr[i][j] < 1050000000:
newArr[i][j] = 100000
else:
newArr[i][j] = 1000000
mask = create_circular_mask(10)
return gf(gf(gf(newArr, np.nanmean, footprint=mask), np.nanmean, footprint=mask), np.nanmedian, footprint=mask)
def breath_plot(self, ana, exeno):
fig = plt.figure(1)
ax = fig.add_subplot(111)
if len(ana.hs.hstate) == 0: # only did breathe test (i.e. exer 1)
ax.plot(gf(ana.brth.breath_list, 5), color='g')
if len(ana.brth.ngframe) != 0:
for i in ana.brth.ngframe:
y1 = ana.brth.breath_list[i]
y2 = y1 - 20
ax.annotate('Not deep breathing', xy=(i, y1-2), xytext=(i, y2),\
arrowprops=dict(facecolor='red', shrink=0.05),)
plt.title('Breathe in and out')
fig.savefig('output/Exer%s_bio_1.jpg' % repr(exeno))
plt.close(fig)
def local_minmax(self, seq, th, minmax, rng=15):
""" finding local min or max depending on the argument minmax
"""
angle_bending = gf(self.angle_mean, 3)
pts = argrelextrema(angle_bending, minmax, order=rng)[0]
if len(pts) != 0:
if pts[-1] - seq[-1][0] >= rng and minmax(angle_bending[pts[-1]],
th):
seq = np.vstack(
(seq, np.array([pts[-1], angle_bending[pts[-1]]])))
elif 0 < pts[-1] - seq[-1][0] < rng and minmax(
angle_bending[pts[-1]], seq[-1][1]):
seq[-1] = np.array([pts[-1], angle_bending[pts[-1]]])
return np.atleast_2d(seq)
def create_filter_with_mask(postfix, arr_with_filenames, function, mask):
"""
Create a filter over an array of filenames.npy files.
Existing files with correct naming schemes will NOT be updated if they exist.
_raw files will be skipped.
Returns an iterator that can be used to show/save filtered arrays. A name is also yielded.
"""
for filename in arr_with_filenames:
if filename[-4:] != "_raw":
continue
elif os.path.isfile(f"./{filename[:-4]}_{postfix}.npy"):
continue
arr = np.load(f"{filename}.npy")
holder = gf(arr, function, footprint=mask)
yield (f"{filename[:-4]}_{postfix}", holder)
def dmask(delta, thresh=0.5, morph=True, struct=3, smooth=False, sigma=1):
mask = np.where(
delta > thresh, 0,
1) # set values where delta > thresh to 0 and otherwise to 1
mask[np.isnan(delta)] = 0 # make sure NaNs are masked
if morph: # removes holes and island pixels
mask = nd.binary_closing(nd.binary_opening(mask,
structure=np.ones(
(struct, struct))),
structure=np.ones((struct, struct)))
if smooth:
mask = gf(
mask.astype(float), sigma
) # reduces pixelation. Not applicable with mixed mapping from Tyo et al
# only usable if P is multiplied by D prior to visualization
return mask
def score(self, im_diff):
a, b = self.pos.x, self.pos.y
r = np.round(self.diameter / 2).astype('int')
n = 2 * r + 1
data = im_diff[b - r:b + r + 1, a - r:a + r + 1, :]
kernel = np.zeros((n, n, 3))
y, x = np.ogrid[-r:r + 1, -r:r + 1]
mask_circle = x**2 + y**2 <= r**2
kernel[mask_circle] = 1
# I expect to see RuntimeWarnings in this block
with warnings.catch_warnings():
warnings.simplefilter("ignore", category=RuntimeWarning)
fitness = np.mean(
np.mean(np.mean(gf(data, np.mean, footprint=kernel))))
self.fitness = fitness
def get_batch():
out = buffer[0:1 + 2]
out_hr = buffer_hr[0:3]
buffer.pop(0)
buffer_hr.pop(0)
add_image = next(reader)
buffer_hr.append(add_image)
# downscale by factor 4 with gaussian smoothing
if downscale:
s = 1.5
add_image = gf(add_image, sigma=[s, s, 0])[0::4, 0::4, :]
add_image = np.rint(np.clip(add_image, 0, 255)).astype(np.uint8)
buffer.append(add_image)
return np.array(out), np.array(out_hr)
def clip(self, seqlist, weight):
""" try find the subsequence from current sequence
"""
tgrad = 0
for ii in [3, 4, 5, 6, 7, 8, 12, 13, 14, 15, 16, 17]:
tgrad += (np.gradient(gf(seqlist[:, ii], 1))**2) * weight[ii]
tgrad = tgrad**0.5
lcalminm = argrelextrema(tgrad, np.less, order=5)[0]
foo = np.where(((tgrad < 1) * 1) == 0)[0]
if (len(foo) == 0) | (len(lcalminm) == []):
return []
else:
lb = max(foo[0], 50)
minm = []
for ii in lcalminm[lcalminm > lb]:
if tgrad[ii] < 1:
minm.append(ii)
return minm
def binarize(data, sigma=None, smooth=None):
"""
Convert spectra to boolean values at each wavelength.
The procedure estimates the noise by taking the standard
deviation of the derivative spectrum and dividing by sqrt(2).
The zero-point offset for each spectrum is estimated as the
mean of the first 10 wavelengths (empirically seen to be
"flat" for most spectra) and is removed. Resultant points
>5sigma [default] are given a value of True.
Parameters
----------
sigma : float, optional
Sets the threshold, above which the wavelength is considered
to have flux.
"""
# -- smooth if desired
dat = data.T if not smooth else gf(data.T,[0,smooth])
if sigma:
# -- estimate the noise and zero point for each spectrum
print("BINARIZE: estimating noise level and zero-point...")
sig = (dat[1:]-dat[:-1])[-100:].std(0)/np.sqrt(2.0)
zer = dat[:10].mean(0)
# -- converting to binary
print("BINARIZE: converting spectra to boolean...")
bdata = (dat-zer)>(sigma*sig)
else:
# -- careful about diffraction spikes which look like
# -- absoportion
# mn_tot = dat.mean(0)
# mn_end = dat[-100:].mean(0)
# index = mn_tot > mn_end
# mn = mn_tot*index + mn_end*~index
# -- binarize by comparison with mean
bdata = dat>dat.mean(0)
return bdata.T
def binarize(self, sigma=None, interpolated=False, smooth=False):
"""
Convert spectra to boolean values at each wavelengtqh.
The procedure estimates the noise by taking the standard
deviation of the derivative spectrum and dividing by sqrt(2).
The zero-point offset for each spectrum is estimated as the
mean of the first 10 wavelengths (empirically seen to be
"flat" for most spectra) and is removed. Resultant points
>5sigma [default] are given a value of True.
Parameters
----------
sigma : float, optional
Sets the threshold, above which the wavelength is considered to
have flux.
interpolated: bool, optional
If True, binarize the interpolated spectra.
"""
dat = self.rows.T if not interpolated else self.irows.T
if smooth:
dat[:] = gf(dat,[smooth,0])
if sigma:
# -- estimate the noise and zero point for each spectrum
print("BINARIZE: estimating noise level and zero-point...")
sig = (dat[1:]-dat[:-1]).std(0)/np.sqrt(2.0)
zer = dat[:10].mean(0)
# -- converting to binary
print("BINARIZE: converting spectra to boolean...")
self.brows = ((dat-zer)>(sigma*sig)).T.copy()
else:
# -- binarize by comparison with mean
self.brows = (dat > dat.mean(0)).T
return
def find_centers(self):
win = g.m.currentWindow
im = win.image
mx,my=win.imageDimensions()
self.rois = []
g.centers = []
for roi in g.m.currentWindow.rois:
mask = roi.mask
mask=mask[(mask[:,0]>=0)*(mask[:,0]<mx)*(mask[:,1]>=0)*(mask[:,1]<my)]
xx=mask[:,0]; yy=mask[:,1]
centers = []
for frame in im:
gframe = gf(frame, 1)
x0, y0 = np.unravel_index(gframe.argmax(), gframe.shape)
#centers.append([x0, y0])
#vals = fitGaussian(frame, (x0, y0, 1, 3))
#x1, y1, a, b = vals[0]
centers.append([x0, y0])
self.rois.append({'roi': roi, 'centers': centers})
self.plotCenters()
def mod_zdiff(composite, mod_id, algorithm, **kwargs):
zdiff_channel, zdiff_channel_created = composite.channels.get_or_create(name="-zdiff")
for t in range(composite.series.ts):
print("step02 | processing mod_zdiff t{}/{}...".format(t + 1, composite.series.ts), end="\r")
# get zmod
zmod_gon = composite.gons.get(channel__name="-zmod", t=t)
zmod = (exposure.rescale_intensity(zmod_gon.load() * 1.0) * composite.series.zs).astype(int)
zbf = exposure.rescale_intensity(composite.gons.get(channel__name="-zbf", t=t).load() * 1.0)
zmean = exposure.rescale_intensity(composite.gons.get(channel__name="-zmean", t=t).load() * 1.0)
# get markers
markers = composite.markers.filter(track_instance__t=t)
zdiff = np.zeros(zmod.shape)
for marker in markers:
marker_z = zmod[marker.r, marker.c]
diff = np.abs(zmod - marker_z)
diff_thresh = diff.copy()
diff_thresh = gf(diff_thresh, sigma=5)
diff_thresh[diff > 1] = diff.max()
marker_diff = 1.0 - exposure.rescale_intensity(diff_thresh * 1.0)
zdiff = np.max(np.dstack([zdiff, marker_diff]), axis=2)
zdiff_gon, zdiff_gon_created = composite.gons.get_or_create(
experiment=composite.experiment, series=composite.series, channel=zdiff_channel, t=t
)
zdiff_gon.set_origin(0, 0, 0, t)
zdiff_gon.set_extent(composite.series.rs, composite.series.cs, 1)
zdiff_gon.array = (zdiff.copy() + zmean.copy()) * zmean.copy()
zdiff_gon.save_array(composite.series.experiment.composite_path, composite.templates.get(name="source"))
zdiff_gon.save()
def task(filename, task_params):
''' Simple task calculating average value in a region. Boundary assumes the expected format being sent in.
@author Wei Ren
@param filename - file name of the FITS image
@param task_params - Region to calculate mean value on. Currently support `rect` and `circle` regions.
@return Mean value of the results or Error info.
'''
hdulist = fits.open(filename)
region = hdulist[0].data
region_type, value = task_params['type'], task_params['value']
if (region_type=='rect'):
region_slice = parseRegion_rect(value)
ROI = region[region_slice]
avg = str(np.mean(ROI))
elif (region_type=='circle'):
mask = circle_mask(region, value)
avg = str(gf(region, np.mean, footprint=mask))
else:
avg = "Region type is not recognized."
hdulist.close()
return {"result":avg},None
def create_max_gfp(self):
# template
template = self.templates.get(name='source') # SOURCE TEMPLATE
# channels
max_gfp_channel, max_gfp_channel_created = self.channels.get_or_create(name='-mgfp')
# iterate over frames
for t in range(self.series.ts):
print('step01 | creating max_gfp t{}/{}...'.format(t+1, self.series.ts), end='\r')
# load gfp
gfp_gon = self.gons.get(t=t, channel__name='0')
gfp = exposure.rescale_intensity(gfp_gon.load() * 1.0)
gfp = gf(gfp, sigma=2) # <<< SMOOTHING
# images to channel gons
max_gfp_gon, max_gfp_gon_created = self.gons.get_or_create(experiment=self.experiment, series=self.series, channel=max_gfp_channel, t=t)
max_gfp_gon.set_origin(0,0,0,t)
max_gfp_gon.set_extent(self.series.rs, self.series.cs, 1)
max_gfp_gon.array = np.max(gfp, axis=2)
max_gfp_gon.save_array(self.series.experiment.composite_path, template)
max_gfp_gon.save()
def create_zunique(self):
zunique_channel, zunique_channel_created = self.channels.get_or_create(name='-zunique')
for t in range(self.series.ts):
print('creating zunique t{}/{}'.format(t+1, self.series.ts), end='\r' if t<self.series.ts-1 else '\n')
zmean = exposure.rescale_intensity(self.gons.get(channel__name='-zmean', t=t).load() * 1.0)
zmod = exposure.rescale_intensity(self.gons.get(channel__name='-zmod', t=t).load() * 1.0)
zunique = np.zeros(zmean.shape)
for unique in np.unique(zmod):
zunique[zmod==unique] = np.max(zmean[zmod==unique]) / np.sum(zmean)
zunique = gf(zunique, sigma=3)
zunique_gon, zunique_gon_created = self.gons.get_or_create(experiment=self.experiment, series=self.series, channel=zunique_channel, t=t)
zunique_gon.set_origin(0,0,0,t)
zunique_gon.set_extent(self.series.rs, self.series.cs, 1)
zunique_gon.array = zunique.copy()
zunique_gon.save_array(self.experiment.composite_path, self.templates.get(name='source'))
zunique_gon.save()
return zunique_channel
def create_zmod(self, R=5, delta_z=-8, sigma=5):
# template
template = self.templates.get(name='source') # SOURCE TEMPLATE
# channels
zmod_channel, zmod_channel_created = self.channels.get_or_create(name='-zmod')
zmean_channel, zmean_channel_created = self.channels.get_or_create(name='-zmean')
zbf_channel, zbf_channel_created = self.channels.get_or_create(name='-zbf')
zcomp_channel, zcomp_channel_created = self.channels.get_or_create(name='-zcomp')
# iterate over frames
for t in range(self.series.ts):
print('step01 | creating zmod, zmean, zbf, zcomp t{}/{}...'.format(t+1, self.series.ts), end='\r')
# load gfp
gfp_gon = self.gons.get(t=t, channel__name='0')
gfp = exposure.rescale_intensity(gfp_gon.load() * 1.0)
gfp = gf(gfp, sigma=sigma) # <<< SMOOTHING
# load bf
bf_gon = self.gons.get(t=t, channel__name='1')
bf = exposure.rescale_intensity(bf_gon.load() * 1.0)
# initialise images
Z = np.zeros(self.series.shape(d=2), dtype=int)
Zmean = np.zeros(self.series.shape(d=2))
Zbf = np.zeros(self.series.shape(d=2))
# loop over image
Z = np.argmax(gfp, axis=2) + delta_z
# outliers
Z[Z<0] = 0
Z[Z>self.series.zs-1] = self.series.zs-1
# loop over levels
for level in range(bf.shape[2]):
bf[:,:,level] = convolve(bf[:,:,level], np.ones((R,R)))
Zbf[Z==level] = bf[Z==level,level]
Zmean = 1 - np.mean(gfp, axis=2) / np.max(gfp, axis=2)
# images to channel gons
zmod_gon, zmod_gon_created = self.gons.get_or_create(experiment=self.experiment, series=self.series, channel=zmod_channel, t=t)
zmod_gon.set_origin(0,0,0,t)
zmod_gon.set_extent(self.series.rs, self.series.cs, 1)
zmod_gon.array = Z
zmod_gon.save_array(self.series.experiment.composite_path, template)
zmod_gon.save()
zmean_gon, zmean_gon_created = self.gons.get_or_create(experiment=self.experiment, series=self.series, channel=zmean_channel, t=t)
zmean_gon.set_origin(0,0,0,t)
zmean_gon.set_extent(self.series.rs, self.series.cs, 1)
zmean_gon.array = exposure.rescale_intensity(Zmean * 1.0)
zmean_gon.save_array(self.series.experiment.composite_path, template)
zmean_gon.save()
zbf_gon, zbf_gon_created = self.gons.get_or_create(experiment=self.experiment, series=self.series, channel=zbf_channel, t=t)
zbf_gon.set_origin(0,0,0,t)
zbf_gon.set_extent(self.series.rs, self.series.cs, 1)
zbf_gon.array = Zbf
zbf_gon.save_array(self.series.experiment.composite_path, template)
zbf_gon.save()
def zloc(x):
return int((x-zl)/dz)# + 1
def yloc(x):
return int((x-yl)/dy)# + 1
for i in xrange(phi_z.size):
if phi_z[i] > zu or phi_z[i] < zl: continue
if phi_y[i] > yu or phi_y[i] < yl: continue
zpos = zloc(phi_z[i])
ypos = yloc(phi_y[i])
a[ypos, zpos] += abs(intensity[i])
fig = plt.figure(figsize=(7,7), dpi=100)
ax = fig.add_subplot(1, 1, 1)
a2 = gf(a, 10.0)
ylabels = range(int(yl),int(yu))
ylocs = [yloc(x) for x in ylabels]
ylabels = ['$'+str(x).strip()+'$' for x in ylabels]
zlabels = range(int(zl),int(zu),3)
zlocs = [zloc(x) for x in zlabels]
zlabels = ['$'+str(x).strip()+'$' for x in zlabels]
a2 /= a2.max()
s = plt.imshow(a2, cmap=cm.jet)
plt.yticks(ylocs, ylabels)
plt.xticks(zlocs, zlabels)
plt.xlabel('mas')
plt.ylabel('mas')
def find_protrusions(self): # load mask image and find edge mask_img = self.load() edge_img = edge_image(mask_img) # get list of points that lie on the edge: points_rc points_r, points_c = np.where(edge_img) points_rc = [list(lm) for lm in list(zip(points_r, points_c))] # sort points using a fixed radius count, max_count, sorted_points = roll_edge_v1(points_rc) if count<max_count: # get cell centre and calculate distances of edge points from this point cell_centre = np.array([self.r, self.c]) distances = np.array([np.linalg.norm(cell_centre - np.array(p)) for p in sorted_points]) # smooth to aid peak finding and shift the points to leave the smallest distance at zero argmin = np.argmin(distances) distances = np.roll(distances, -argmin) distances = gf(distances, sigma=2) # find peaks peaks = find_peaks(distances, np.array([9])) # shift peaks back to their original positions true_peaks = np.array(peaks) + argmin true_peaks[true_peaks>=len(sorted_points)] -= len(sorted_points) # rotate # find end points protrusion_end_points = [sorted_points[peak] for peak in true_peaks] # create new protrusion for each end point for protrusion_end_point in protrusion_end_points: relative_end_point = cell_centre - np.array(protrusion_end_point) # parameters r = relative_end_point[0] c = relative_end_point[1] length_from_centre = np.linalg.norm(relative_end_point * self.series.scaling()) # in microns length_from_mean = length_from_centre - np.mean(distances) orientation_from_horizontal = math.atan2(relative_end_point[0], relative_end_point[1]) # print(self.cell_instance.pk, self.pk, r, c, length_from_centre, orientation_from_horizontal) protrusion, protrusion_created = self.protrusions.get_or_create(experiment=self.experiment, series=self.series, cell=self.cell, cell_instance=self.cell_instance, channel=self.channel, region=self.region, region_instance=self.region_instance, r=r, c=c) if protrusion_created: protrusion.length = length_from_centre protrusion.length_from_mean = length_from_mean protrusion.orientation = orientation_from_horizontal protrusion.save() return 'success', len(protrusion_end_points) else: return 'success', 0
from __future__ import division
from SSTV import *
from scipy.ndimage.filters import gaussian_filter as gf
import numpy as np
from scipy import misc
# Set up
fraction_coeffs = 0.04
image = misc.imread('imgs/lena.bmp') # load an image: {dude, cal, lake,...}
original = np.copy(image)
_delta = 0.1
or_shape = image.shape
# Gaussian Filter [IMPORTANT] -- LPF
image = gf(image, 0.2)
image = join_imgs([ map2multiple(im, 64) for im in split_img(image)]) # for weird shapes, map2multiple
yccimgs = split_img(rgb2ycc(image))
wavelet='bior4.4'
print('Original shape:',or_shape)
print('New shape:',image.shape)
dwts = []
ds_ycc = []
compressed_imgs = []
us_ycc = []
sample_facts = [2,4,4]
print('Downsampling YCC channels...')
for i in range(len(yccimgs)):
def BlobExtract(vidname,ith=30,pth=0,skip = 0,fnum = 500 ,nbuff = 241,fac=8):
#ith : intensity differece
#pth : threshold for number of pixels in certain label
#skip: skip first N frame
#maskpath : 0 :no mask , others : mask path
#fnum : how many frame you want to process
#nbuff : buffer size
#fac : downsampling scale
import os
import sys
import cv2
import pickle
import numpy as np
from scipy.ndimage.filters import gaussian_filter as gf
from scipy.ndimage.measurements import label
if os.path.isfile(vidname):
cap = cv2.VideoCapture(vidname)
else:
print("Error!! Can not find the file...")
exit
nFrame = int(cap.get(cv2.cv.CV_CAP_PROP_FRAME_COUNT))
nrow = cap.get(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT)
ncol = cap.get(cv2.cv.CV_CAP_PROP_FRAME_WIDTH)
tind = nbuff//2
frame = np.zeros([nrow,ncol,3])
img = np.zeros([nrow,ncol,3])
bkg = np.zeros([nrow,ncol,3],dtype=float)
buff = np.zeros([nbuff,nrow,ncol,3])
diff = np.zeros([nrow,ncol,3])
diffb = np.zeros([nrow/fac,ncol/fac])
rows = np.arange(nrow*ncol/(fac*fac)).reshape(nrow/fac,ncol/fac) // (ncol/fac)
cols = np.arange(nrow*ncol/(fac*fac)).reshape(nrow/fac,ncol/fac) % (ncol/fac)
timestamp = {}
maskpath = Choosemask()
if not maskpath:
mask = np.ones([nrow,ncol])
else:
import pickle
mask = pickle.load(open(maskpath,"rb"))
# -- initialize tblob dictionary
Blobdict = {}
# -- initialize the display
fig, ax = plt.subplots(2,2,figsize=[10,7.5])
fig.subplots_adjust(0,0,1,1,0,0)
[j.axis('off') for i in ax for j in i]
im = [ax[0][0].imshow(frame,), ax[0][1].imshow(frame),
ax[1][0].imshow(frame,'gray'), ax[1][1].imshow(diffb,'gray')]
im[2].set_clim([20,128])
im[3].set_clim([15,25])
fig.canvas.draw()
cap.set(cv2.cv.CV_CAP_PROP_POS_FRAMES,skip)
# -- loop through frames
if fnum == -1:
pfnum = nFrame-skip #process frame number
else:
pfnum = min(nFrame-skip,fnum)
for ii in range(pfnum):
print("frame {0}\r".format(ii+skip)),
sys.stdout.flush()
# read the frame
chk, frame[:,:,:] = cap.read()
# load buffer and update background
if ii<nbuff:
buff[ii,:,:,:] = frame[:,:,:]
continue
elif ii==nbuff:
bkg[:,:,:] = buff.mean(0)
cnt = 0
continue
else:
bind = cnt % nbuff
img[:,:,:] = buff[(bind+tind)%nbuff]
bkg[:,:,:] -= buff[bind]/float(nbuff)
bkg[:,:,:] += frame/float(nbuff)
buff[bind] = frame
cnt += 1
# calculate the difference image then rebin and smooth
diff[:,:,:] = img-bkg
diffb[:,:] = gf((np.abs(diff).mean(2)*mask).reshape(nrow/fac,fac,ncol/fac,fac
).mean(1).mean(-1),[3,1])
try:
[i.remove() for i in recs]
except:
pass
labcnt = 0
blobs = {}
labs = label(diffb>ith)
nlab = labs[1]
if nlab>0:
rcen = np.zeros(nlab)
ccen = np.zeros(nlab)
rmm = np.zeros([nlab,2])
cmm = np.zeros([nlab,2])
recs = []
for jj in range(nlab):
if sum((labs[0]==(jj+1)).flatten())>pth:
tlab = jj+1
lind = labs[0]==tlab
trow = rows[lind]
tcol = cols[lind]
rcen[jj] = trow.mean()*fac
ccen[jj] = tcol.mean()*fac
rmm[jj] = [trow.min()*fac,trow.max()*fac]
cmm[jj] = [tcol.min()*fac,tcol.max()*fac]
recs.append(ax[0][0].add_patch(plt.Rectangle((cmm[jj,0],rmm[jj,0]),
cmm[jj,1]-cmm[jj,0],
rmm[jj,1]-rmm[jj,0],
facecolor='none',
edgecolor='orange',
lw=2)))
labcnt += 1
blobs[labcnt] = [[cmm[jj,0],rmm[jj,0]],[cmm[jj,1]-cmm[jj,0],rmm[jj,1]-rmm[jj,0]]]
text = ax[0][0].annotate(str(labcnt),xy=(ncol-40,nrow-50),color = 'red',fontsize = 20)
im[0].set_data(img.astype(np.uint8)[:,:,::-1])
im[1].set_data(bkg.astype(np.uint8)[:,:,::-1])
im[2].set_data(np.abs(diff).mean(2))
im[3].set_data(diffb)
fig.canvas.set_window_title('Frame {0}'.format(ii+skip))
fig.canvas.draw()
ax[0][0].texts.remove(text)
blobs[0] = labcnt
if r >= 0:
ridx = row_zero[r]
if c >= 0:
cidx = col_zero[c]
return m[:ridx,:cidx]
# Set up
fraction_coeffs = 1
image_fname = 'imgs/lena.bmp'
image = misc.imread(image_fname) # load an image: {dude, cal, lake,...}
original = np.copy(image)
_delta = 0.1
or_shape = image.shape
# Gaussian Filter [IMPORTANT] -- LPF
image = gf(image, 0.15)
image = join_imgs([ map2multiple(im, 64) for im in split_img(image)]) # for weird shapes, map2multiple
yccimgs = split_img(rgb2ycc(image))
wavelet='bior4.4'
print('Original shape:',or_shape)
print('New shape:',image.shape)
dwts = []
ds_ycc = []
compressed_imgs = []
us_ycc = []
sample_facts = [2,4,4]
print('Downsampling YCC channels...')
def canny1d(lcs, indices=None, width=30, delta=2, see=False, sig_clip_iter=10,
sig_clip_amp=2.0, sig_peaks=10.0, xcheck=True, sig_xcheck=2.0):
# -- defaults
if indices==None:
nwin = lcs.lcs.shape[0]
indices = range(nwin)
print("DST_CANNY1D: running edge detector for all " +
"{0} windows...".format(nwin))
else:
nwin = len(indices)
print("DST_CANNY1D: running edge detector for " +
"{0} windows...".format(nwin))
# -- utilities
lcg = np.zeros(lcs.lcs.shape[1:])
dlcg = np.ma.zeros(lcg.shape)
dlcg.mask = dlcg>314
ind_onoff = []
ints = np.arange(lcs.lcs.shape[0])
# -- loop through windows
for ii, index in enumerate(indices):
if ii%100==0:
print("DST_CANNY1D: {0} of {1}".format(ii,nwin))
# -- smooth each band
for band in [0,1,2]:
lcg[:,band] = gf(lcs.lcs[index,:,band],width)
# -- compute Gaussian difference and set mask edges
dlcg[:,:] = np.roll(lcg,-delta,0)-np.roll(lcg,delta,0)
dlcg.mask[:width] = True
dlcg.mask[-width:] = True
# -- plot
if see:
plt.figure(6)
plt.clf()
plt.subplot(2,2,2)
plt.plot(dlcg[:,0], lw=2)
plt.ylim([1.2*dlcg.min(),1.2*dlcg.max()])
plt.subplot(2,2,3)
plt.plot(dlcg[:,1], lw=2)
plt.ylim([1.2*dlcg.min(),1.2*dlcg.max()])
plt.subplot(2,2,4)
plt.plot(dlcg[:,2], lw=2)
plt.ylim([1.2*dlcg.min(),1.2*dlcg.max()])
# -- sigma clip
for _ in range(10):
avg = dlcg.mean(0)
sig = dlcg.std(0)
dlcg.mask = np.abs(dlcg-avg) > sig_clip_amp*sig
if see:
plt.subplot(2,2,2)
plt.plot(dlcg[:,0], lw=2)
plt.subplot(2,2,3)
plt.plot(dlcg[:,1], lw=2)
plt.subplot(2,2,4)
plt.plot(dlcg[:,2], lw=2)
# -- set mean and std and reset the mask
avg = dlcg.mean(0)
sig = dlcg.std(0)
dlcg.mask[:,:] = False
dlcg.mask[:width] = True
dlcg.mask[-width:] = True
# -- find peaks in RGB
ind_on_rgb, ind_off_rgb = [], []
tags_on = (dlcg-avg > sig_peaks*sig) & \
(dlcg>np.roll(dlcg,1,0)) & \
(dlcg>np.roll(dlcg,-1,0)) & \
~dlcg.mask
tags_off = (dlcg-avg < -sig_peaks*sig) & \
(dlcg<np.roll(dlcg,1,0)) & \
(dlcg<np.roll(dlcg,-1,0)) & \
~dlcg.mask
for band in [0,1,2]:
ind_on_rgb.append([i for i in ints[tags_on[:,band]]])
ind_off_rgb.append([ i for i in ints[tags_off[:,band]]])
# -- collapse RGB indices
for iind in ind_on_rgb[0]:
for jind in ind_on_rgb[1]:
if abs(iind-jind)<=2:
ind_on_rgb[1].remove(jind)
for jind in ind_on_rgb[2]:
if abs(iind-jind)<=2:
ind_on_rgb[2].remove(jind)
for iind in ind_on_rgb[1]:
for jind in ind_on_rgb[2]:
if abs(iind-jind)<=2:
ind_on_rgb[2].remove(jind)
ind_on_list = ind_on_rgb[0] + ind_on_rgb[1] + ind_on_rgb[2]
for iind in ind_off_rgb[0]:
for jind in ind_off_rgb[1]:
if abs(iind-jind)<=2:
ind_off_rgb[1].remove(jind)
for jind in ind_off_rgb[2]:
if abs(iind-jind)<=2:
ind_off_rgb[2].remove(jind)
for iind in ind_off_rgb[1]:
for jind in ind_off_rgb[2]:
if abs(iind-jind)<=2:
ind_off_rgb[2].remove(jind)
ind_off_list = ind_off_rgb[0] + ind_off_rgb[1] + ind_off_rgb[2]
# -- cross check left/right means for robustness to noise
if xcheck:
rtwd = np.sqrt(width)
for on in [_ for _ in ind_on_list]:
mn_l = lcs.lcs[index,on-width:on].mean(1).mean()
err_l = lcs.lcs[index,on-width:on].mean(1).std()
mn_r = lcs.lcs[index,on:on+width].mean(1).mean()
err_r = lcs.lcs[index,on:on+width].mean(1).std()
if abs(mn_r-mn_l)<(sig_xcheck*max(err_l,err_r)):
ind_on_list.remove(on)
for off in [_ for _ in ind_off_list]:
mn_l = lcs.lcs[index,off-width:off].mean(1).mean()
err_l = lcs.lcs[index,off-width:off].mean(1).std()
mn_r = lcs.lcs[index,off:off+width].mean(1).mean()
err_r = lcs.lcs[index,off:off+width].mean(1).std()
if abs(mn_r-mn_l)<(sig_xcheck*max(err_l,err_r)):
ind_off_list.remove(off)
# -- add to on/off list
tind_onoff = np.array([i for i in ind_on_list+[-j for j in
ind_off_list]])
ind_onoff.append(tind_onoff[np.argsort(np.abs(tind_onoff))])
# if see:
# plt.subplot(2,2,2)
# plt.plot(np.arange(dlcg.shape[0])[on_ind[:,0]],
# dlcg[on_ind[:,0],0], 'go')
return ind_onoff
plt.hist(zs["LSSTc"]["resolved"],bins=numpy.linspace(0,5.5,56),normed=True,fc="red",alpha=0.6)
plt.xlabel(r"redshift")
plt.ylabel(r"Lenses per bin")
plt.tight_layout()
if save:plt.savefig("/home/ttemp/papers/LensPop/LSSTz.pdf")
#plt.show()
plt.cla()
a,bins=numpy.histogram(sigl["Euclid"]["resolved"],bins=numpy.linspace(100,400,81),normed=True)
b,bins1=numpy.histogram(sigl["CFHTa"]["resolved"],bins=numpy.linspace(100,400,81),normed=True)
c,bins2=numpy.histogram(sigl["LSSTc"]["resolved"],bins=numpy.linspace(100,400,81),normed=True)
#c*=2
d,bins3=numpy.histogram(sigl["DESc"]["resolved"],bins=numpy.linspace(100,400,81),normed=True)
from scipy.ndimage.filters import gaussian_filter as gf
idx=2
a[idx:]=gf(a,2)[idx:]
b=gf(b,4)
c=gf(c,4)
d=gf(d,4)
#d*=4
db=bins[1]-bins[0]
db1=bins1[1]-bins1[0]
db2=bins2[1]-bins2[0]
db3=bins3[1]-bins3[0]
plt.plot(bins[:-1]+db/2.,a,lw=3,c='k',label="Euclid")
plt.plot(bins2[:-1]+db2/2.,c,lw=3,c='b',label="LSST")
plt.plot(bins3[:-1]+db3/2.,d,lw=3,c='r',label="DES")
plt.plot(bins1[:-1]+db1/2.,b,lw=3,c='g',label="CFHT")
plt.legend()
def gauss_filter(im, sigma = 10):
from scipy.ndimage.filters import gaussian_filter as gf
import numpy as np
return gf(im, sigma = sigma)
cnt = 0
continue
else:
bind = cnt % nbuff
img[:,:,:] = buff[(bind+tind)%nbuff]
bkg[:,:,:] -= buff[bind]/float(nbuff)
bkg[:,:,:] += frame/float(nbuff)
buff[bind] = frame
cnt += 1
# calculate the difference image then rebin and smooth
diff[:,:,:] = img-bkg
#diffb[:,:] = gf((np.abs(diff).mean(2)*mask).reshape(nrow/fac,fac,ncol/fac,fac
vxpts = (array(self.tracks[i]).T[0][1:-1] - array(self.tracks[i]).T[0][:-2])/vxth # ).mean(1).mean(-1),[3,1])
diffb[:,:] = gf(np.abs(diff).mean(2).reshape(nrow/fac,fac,ncol/fac,fac
).mean(1).mean(-1),[3,1])
# update plots by removing labels then updating
try:
[i.remove() for i in recs]
except:
pass
labcnt = 0
labs = label(diffb>30)
nlab = labs[1]
if nlab>0:
rcen = np.zeros(nlab)
elif ii==nbuff:
bkg[:,:,:] = buff.mean(0)
cnt = 0
continue
else:
bind = cnt % nbuff
img[:,:,:] = buff[(bind+tind)%nbuff]
bkg[:,:,:] -= buff[bind]/float(nbuff)
bkg[:,:,:] += frame/float(nbuff)
buff[bind] = frame
cnt += 1
# calculate the difference image then rebin and smooth
diff[:,:,:] = img-bkg
diffb[:,:] = gf((np.abs(diff).mean(2)*mask).reshape(nrow/fac,fac,ncol/fac,fac
).mean(1).mean(-1),[1,1])
#diffb[:,:] = gf(np.abs(diff).mean(2).reshape(nrow/fac,fac,ncol/fac,fac
# ).mean(1).mean(-1),[1,1])
# update plots by removing labels then updating
try:
[i.remove() for i in recs]
except:
pass
labcnt = 0
labs = label(diffb>30)
nlab = labs[1]
from scipy import misc
from encoding2 import encode_ar, decode_ar, slice_box, compress_np, decompress_np
import itertools as its
from SSTV.wavcompress import getSize
from SSTV.wavcompress import expand_dwt
# Set up
fraction_coeffs = .01
image_fname = 'imgs/lena.bmp'
image = misc.imread(image_fname) # load an image: {dude, cal, lake,...}
original = np.copy(image)
_delta = 0.1
or_shape = image.shape
# Gaussian Filter [IMPORTANT] -- LPF
image = gf(image, 0.08)
image = join_imgs([ map2multiple(im, 64) for im in split_img(image)]) # for weird shapes, map2multiple
yccimgs = split_img(rgb2ycc(image))
wavelet='bior4.4'
print('Original shape:',or_shape)
print('New shape:',image.shape)
dwts = []
ds_ycc = []
compressed_imgs = []
us_ycc = []
sample_facts = [0,2,2]
print('Downsampling YCC channels...')
def filterf(self):
"""Gaussian filtering of velocity """
from scipy.ndimage.filters import gaussian_filter as gf
self._obj['u'] = xr.DataArray(gf(self._obj['u'],1),dims=('x','y'))
self._obj['v'] = xr.DataArray(gf(self._obj['v'],1),dims=('x','y'))
return self._obj
def mod_zmod(composite, mod_id, algorithm, **kwargs):
# template
template = composite.templates.get(name="source") # SOURCE TEMPLATE
# channels
zmod_channel, zmod_channel_created = composite.channels.get_or_create(name="-zmod")
zmean_channel, zmean_channel_created = composite.channels.get_or_create(name="-zmean")
zbf_channel, zbf_channel_created = composite.channels.get_or_create(name="-zbf")
zcomp_channel, zcomp_channel_created = composite.channels.get_or_create(name="-zcomp")
# constants
delta_z = -8
size = 5
sigma = 5
template = composite.templates.get(name="source")
# iterate over frames
for t in range(composite.series.ts):
print("step01 | processing mod_zmod t{}/{}...".format(t + 1, composite.series.ts), end="\r")
# load gfp
gfp_gon = composite.gons.get(t=t, channel__name="0")
gfp = exposure.rescale_intensity(gfp_gon.load() * 1.0)
gfp = gf(gfp, sigma=sigma) # <<< SMOOTHING
# load bf
bf_gon = composite.gons.get(t=t, channel__name="1")
bf = exposure.rescale_intensity(bf_gon.load() * 1.0)
# initialise images
Z = np.zeros(composite.series.shape(d=2), dtype=int)
Zmean = np.zeros(composite.series.shape(d=2))
Zbf = np.zeros(composite.series.shape(d=2))
Zcomp = np.zeros(composite.series.shape(d=2))
# loop over image
for r in range(composite.series.rs):
for c in range(composite.series.cs):
# scan
data = scan_point(gfp, composite.series.rs, composite.series.cs, r, c, size=size)
normalised_data = np.array(data) / np.max(data)
# data
z = int(np.argmax(normalised_data))
cz = z + delta_z # corrected z
mean = 1.0 - np.mean(normalised_data) # 1 - mean
bfz = bf[r, c, cz]
Z[r, c] = cz
Zmean[r, c] = mean
Zbf[r, c] = bfz
Zcomp[r, c] = bfz * mean
# images to channel gons
zmod_gon, zmod_gon_created = composite.gons.get_or_create(
experiment=composite.experiment, series=composite.series, channel=zmod_channel, t=t
)
zmod_gon.set_origin(0, 0, 0, t)
zmod_gon.set_extent(composite.series.rs, composite.series.cs, 1)
zmod_gon.array = Z
zmod_gon.save_array(composite.series.experiment.composite_path, template)
zmod_gon.save()
zmean_gon, zmean_gon_created = composite.gons.get_or_create(
experiment=composite.experiment, series=composite.series, channel=zmean_channel, t=t
)
zmean_gon.set_origin(0, 0, 0, t)
zmean_gon.set_extent(composite.series.rs, composite.series.cs, 1)
zmean_gon.array = exposure.rescale_intensity(Zmean * 1.0)
zmean_gon.save_array(composite.series.experiment.composite_path, template)
zmean_gon.save()
zbf_gon, zbf_gon_created = composite.gons.get_or_create(
experiment=composite.experiment, series=composite.series, channel=zbf_channel, t=t
)
zbf_gon.set_origin(0, 0, 0, t)
zbf_gon.set_extent(composite.series.rs, composite.series.cs, 1)
zbf_gon.array = Zbf
zbf_gon.save_array(composite.series.experiment.composite_path, template)
zbf_gon.save()
zcomp_gon, zcomp_gon_created = composite.gons.get_or_create(
experiment=composite.experiment, series=composite.series, channel=zcomp_channel, t=t
)
zcomp_gon.set_origin(0, 0, 0, t)
zcomp_gon.set_extent(composite.series.rs, composite.series.cs, 1)
zcomp_gon.array = Zcomp
zcomp_gon.save_array(composite.series.experiment.composite_path, template)
zcomp_gon.save()
def res_lc_plot():
# -- read in the residential data
lcs = []
for night in range(22):
fopen = open(os.path.join(os.environ['DST_WRITE'],'res_lc_night_' +
str(night).zfill(2) + '_2.pkl'),'rb')
lcs.append(pkl.load(fopen))
fopen.close()
# -- utilities
tcks, htimes = time_ticks()
# -- define fri/sat and all other days
# we = [0,6,7,13,14,20,21]
# wd = [1,2,3,4,5,8,9,10,11,12,15,16,17,18,19]
we = [0,6,7,13,14,20,21]
wd = [1,2,3,4,5,8,9,10,11,12,15,16,17,18,19]
# -- get mean averaged lc
tmax = min([len(i.mean(0)) for i in lcs if len(i.mean(0))>3000])
mnwd = np.zeros(tmax)
mnwe = np.zeros(tmax)
cnt = 0.0
for idy in wd:
if idy==8: continue
if len(lcs[idy].mean(0))>3000:
mnwd += lcs[idy].mean(0)[:tmax]
cnt += 1.0
mnwd /= cnt
cnt = 0.0
for idy in we:
if idy==21: continue
if len(lcs[idy].mean(0))>3000:
mnwe += lcs[idy].mean(0)[:tmax]
cnt += 1.0
mnwe /= cnt
plt.figure(1,figsize=[5,5])
plt.xticks(tcks,htimes,rotation=30)
plt.ylabel('intensity [arb units]',size=15)
plt.xlim([0,3600])
plt.grid(b=1)
plt.plot(mnwd,'k')
plt.plot(mnwe,'r')
plt.savefig('../output/res_lc_mean.png',clobber=True)
plt.close()
# -- open the figure
plt.figure(0,figsize=[15,5])
plt.subplots_adjust(0.05,0.1,0.95,0.95)
plt.subplot(131)
for idy in wd:
# plt.plot(mf(lcs[idy][0]/lcs[idy][0,0],6))
# plt.plot(mf(lcs[idy].mean(0)/lcs[idy].mean(0)[0],6))
# cdf = np.cumsum(lcs[idy].mean(0))
# plt.plot(cdf/cdf[360]/(np.arange(cdf.size)/360.))
lc_sm = gf(lcs[idy].mean(0)/lcs[idy].mean(0)[0],6)
norm = (lc_sm-lc_sm[-1])
# plt.plot(lc_sm/lc_sm[0])
plt.plot(norm/norm[0])
# plt.plot(gf((lc_sm-np.roll(lc_sm,1))[1:-1],360))
# plt.ylim([0.8,1.2])
# plt.ylim([0.6,1.4])
plt.ylim([-0.1,1.4])
plt.grid(b=1)
plt.xticks(tcks,htimes,rotation=30)
plt.xlim([0,3600])
plt.ylabel('intensity [arb units]',size=15)
plt.subplot(132)
for idy in we:
# plt.plot(mf(lcs[idy][0]/lcs[idy][0,0],6))
# plt.plot(mf(lcs[idy].mean(0)/lcs[idy].mean(0)[0],6))
# cdf = np.cumsum(lcs[idy].mean(0))
# plt.plot(cdf/cdf[360]/(np.arange(cdf.size)/360.))
lc_sm = gf(lcs[idy].mean(0)/lcs[idy].mean(0)[0],6)
norm = (lc_sm-lc_sm[-1])
# plt.plot(lc_sm/lc_sm[0])
plt.plot(norm/norm[0])
# plt.plot(gf((lc_sm-np.roll(lc_sm,1))[1:-1],360))
# plt.ylim([0.6,1.4])
# plt.ylim([0.8,1.2])
plt.ylim([-0.1,1.4])
plt.grid(b=1)
plt.xticks(tcks,htimes,rotation=30)
plt.xlim([0,3600])
plt.ylabel('intensity [arb units]',size=15)
plt.subplot(133)
for idy in wd:
# plt.plot(mf(lcs[idy][0]/lcs[idy][0,0],6),'k')
plt.plot(mf(lcs[idy].mean(0)/lcs[idy].mean(0)[0],6),'k')
for idy in we:
# plt.plot(mf(lcs[idy][0]/lcs[idy][0,0],6),'r')
plt.plot(mf(lcs[idy].mean(0)/lcs[idy].mean(0)[0],6),'r')
plt.ylim([0.6,1.4])
plt.grid(b=1)
plt.xticks(tcks,htimes,rotation=30)
plt.xlim([0,3600])
plt.ylabel('intensity [arb units]',size=15)
plt.savefig('../output/res_lc_all.png',clobber=True)
plt.close()
return
def test_filter(learning_rate=0.1, n_epochs=1000, nkerns=[3, 512],
batch_size=200, verbose=True):
"""
Wrapper function for testing LeNet on SVHN dataset
:type learning_rate: float
:param learning_rate: learning rate used (factor for the stochastic
gradient)
:type n_epochs: int
:param n_epochs: maximal number of epochs to run the optimizer
:type nkerns: list of ints
:param nkerns: number of kernels on each layer
:type batch_size: int
:param batch_szie: number of examples in minibatch.
:type verbose: boolean
:param verbose: to print out epoch summary or not to.
"""
rng = numpy.random.RandomState(23455)
datasets = load_data()
train_set_x, train_set_y = datasets[0]
valid_set_x, valid_set_y = datasets[1]
test_set_x, test_set_y = datasets[2]
# compute number of minibatches for training, validation and testing
n_train_batches = train_set_x.get_value(borrow=True).shape[0]
n_valid_batches = valid_set_x.get_value(borrow=True).shape[0]
n_test_batches = test_set_x.get_value(borrow=True).shape[0]
n_train_batches //= batch_size
n_valid_batches //= batch_size
n_test_batches //= batch_size
# allocate symbolic variables for the data
index = T.lscalar() # index to a [mini]batch
x = T.matrix('x') # the data is presented as rasterized images
y = T.ivector('y') # the labels are presented as 1D vector of
# [int] labels
######################
# BUILD ACTUAL MODEL #
######################
print('... building the model')
# Reshape matrix of rasterized images of shape (batch_size, 3 * 32 * 32)
# to a 4D tensor, compatible with our LeNetConvPoolLayer
layer0_input = x.reshape((batch_size, 3, 32, 32))
# TODO: Construct the first convolutional pooling layer
layer0 = LeNetConvPoolLayer(
rng,
input=layer0_input,
# (batch size, num input feature maps,image height, image width)
image_shape=(batch_size,3,32,32),
# number of filters, num input feature maps,filter height, filter width)
filter_shape=(nkerns[0],3,5,5),
poolsize=(2,2)
)
# TODO: Construct the second convolutional pooling layer
layer1 = LeNetConvPoolLayer(
rng,
input=layer0.output,
# (32-5+1)/2
image_shape=(batch_size,nkerns[0],14,14),
filter_shape=(nkerns[1],nkerns[0],5,5),
poolsize=(2,2)
)
# the HiddenLayer being fully-connected, it operates on 2D matrices of
# shape (batch_size, num_pixels) (i.e matrix of rasterized images).
layer2_input = layer1.output.flatten(2)
# TODO: construct a fully-connected sigmoidal layer
layer2 = HiddenLayer(
rng,
input=layer2_input,
# (14-5+1)/2
n_in=nkerns[1] * 5 * 5,
n_out=500,
activation=T.nnet.sigmoid
)
# TODO: classify the values of the fully-connected sigmoidal layer
layer3 = LogisticRegression(
input=layer2.output,
n_in=500,
n_out=10)
# the cost we minimize during training is the NLL of the model
cost = layer3.negative_log_likelihood(y)
# create a function to compute the mistakes that are made by the model
test_model = theano.function(
[index],
layer3.errors(y),
givens={
x: test_set_x[index * batch_size: (index + 1) * batch_size],
y: test_set_y[index * batch_size: (index + 1) * batch_size]
}
)
validate_model = theano.function(
[index],
layer3.errors(y),
givens={
x: valid_set_x[index * batch_size: (index + 1) * batch_size],
y: valid_set_y[index * batch_size: (index + 1) * batch_size]
}
)
# TODO: create a list of all model parameters to be fit by gradient descent
params = layer3.params + layer2.params + layer1.params + layer0.params
# create a list of gradients for all model parameters
grads = T.grad(cost, params)
# train_model is a function that updates the model parameters by
# SGD Since this model has many parameters, it would be tedious to
# manually create an update rule for each model parameter. We thus
# create the updates list by automatically looping over all
# (params[i], grads[i]) pairs.
updates = [
(param_i, param_i - learning_rate * grad_i)
for param_i, grad_i in zip(params, grads)
]
train_model = theano.function(
[index],
cost,
updates=updates,
givens={
x: train_set_x[index * batch_size: (index + 1) * batch_size],
y: train_set_y[index * batch_size: (index + 1) * batch_size]
}
)
###############
# TRAIN MODEL #
###############
print('... training')
train_nn(train_model, validate_model, test_model,
n_train_batches, n_valid_batches, n_test_batches, n_epochs, verbose)
mean_w_0 = layer0.W.get_value().mean()
plt.figure()
for knkerns0 in range(nkerns[0]):
for kch in range(3):
plt.subplot(3,3,knkerns0*3+kch+1)
plt.imshow(layer0.W.get_value()[knkerns0,kch,:,:])
plt.title('trained filter')
###########################################################################
###########################################################################
###########################################################################
filter_shape_input = (nkerns[0],3,5,5)
pt_input = numpy.zeros((filter_shape_input[2],filter_shape_input[3]))
pt_input[(filter_shape_input[2]-1)/2,(filter_shape_input[3]-1)/2]=1.0
W = numpy.zeros(filter_shape_input)
from scipy.ndimage.filters import gaussian_filter as gf
for knkerns0 in range(nkerns[0]):
for kch in range(3):
W[knkerns0,kch,:,:]=gf(pt_input,(knkerns0+1.0))
W[knkerns0,kch,:,:] = W[knkerns0,kch,:,:]/W[knkerns0,kch,:,:].mean()*mean_w_0
W = theano.shared(W,borrow=True)
# TODO: Construct the first convolutional pooling layer
layer0 = LeNetConvPoolLayer(
rng,
input=layer0_input,
# (batch size, num input feature maps,image height, image width)
image_shape=(batch_size,3,32,32),
# number of filters, num input feature maps,filter height, filter width)
filter_shape=filter_shape_input,
poolsize=(2,2)
)
layer0.W = W
# TODO: Construct the second convolutional pooling layer
layer1 = LeNetConvPoolLayer(
rng,
input=layer0.output,
# (32-5+1)/2
image_shape=(batch_size,nkerns[0],14,14),
filter_shape=(nkerns[1],nkerns[0],5,5),
poolsize=(2,2)
)
# the HiddenLayer being fully-connected, it operates on 2D matrices of
# shape (batch_size, num_pixels) (i.e matrix of rasterized images).
layer2_input = layer1.output.flatten(2)
# TODO: construct a fully-connected sigmoidal layer
layer2 = HiddenLayer(
rng,
input=layer2_input,
# (14-5+1)/2
n_in=nkerns[1] * 5 * 5,
n_out=500,
activation=T.nnet.sigmoid
)
# TODO: classify the values of the fully-connected sigmoidal layer
layer3 = LogisticRegression(
input=layer2.output,
n_in=500,
n_out=10)
# the cost we minimize during training is the NLL of the model
cost = layer3.negative_log_likelihood(y)
# create a function to compute the mistakes that are made by the model
test_model = theano.function(
[index],
layer3.errors(y),
givens={
x: test_set_x[index * batch_size: (index + 1) * batch_size],
y: test_set_y[index * batch_size: (index + 1) * batch_size]
}
)
validate_model = theano.function(
[index],
layer3.errors(y),
givens={
x: valid_set_x[index * batch_size: (index + 1) * batch_size],
y: valid_set_y[index * batch_size: (index + 1) * batch_size]
}
)
# TODO: create a list of all model parameters to be fit by gradient descent
# the param of layer0 is excluded
params = layer3.params + layer2.params + layer1.params
# create a list of gradients for all model parameters
grads = T.grad(cost, params)
# train_model is a function that updates the model parameters by
# SGD Since this model has many parameters, it would be tedious to
# manually create an update rule for each model parameter. We thus
# create the updates list by automatically looping over all
# (params[i], grads[i]) pairs.
updates = [
(param_i, param_i - learning_rate * grad_i)
for param_i, grad_i in zip(params, grads)
]
train_model = theano.function(
[index],
cost,
updates=updates,
givens={
x: train_set_x[index * batch_size: (index + 1) * batch_size],
y: train_set_y[index * batch_size: (index + 1) * batch_size]
}
)
###############
# TRAIN MODEL #
###############
print('... training')
train_nn(train_model, validate_model, test_model,
n_train_batches, n_valid_batches, n_test_batches, n_epochs, verbose)
plt.figure()
for knkerns0 in range(nkerns[0]):
for kch in range(3):
plt.subplot(3,3,knkerns0*3+kch+1)
plt.imshow(layer0.W.get_value()[knkerns0,kch,:,:])
plt.title('pre-defined filter')
def handle(self, *args, **options):
# vars
experiment_name = options['expt']
series_name = options['series']
if experiment_name!='' and series_name!='':
experiment = Experiment.objects.get(name=experiment_name)
series = experiment.series.get(name=series_name)
# cell_instance = series.cell_instances.get(t=48, cell__pk=4)
# cell_instance = series.cell_instances.get(t=49, cell__pk=9)
# cell_instance = series.cell_instances.get(pk=198)
# load mask image
# 1. for each cell mask, load mask image
outlines = {}
colours = ['red','green','blue','purple']
for i, cell_mask in enumerate(cell_instance.masks.filter(channel__name__contains='zunique')):
mask_img = cell_mask.load()
# get edge
edge_img = edge_image(mask_img)
# get list of points
points_r, points_c = np.where(edge_img)
points = [list(lm) for lm in list(zip(points_r, points_c))]
sorted_points = roll_edge_v1(points)
# plot distances in order
cell_centre = np.array([cell_mask.r, cell_mask.c])
distances = np.array([np.linalg.norm(cell_centre - np.array(p)) for p in sorted_points])
argmin = np.argmin(distances)
distances = np.roll(distances, -argmin)
distances = gf(distances, sigma=2)
# plt.plot(distances)
# plt.scatter(cell_mask.c, cell_mask.r)
# find peaks in distance array
peaks = find_peaks(distances, np.array([9]))
# plt.scatter(peaks, [distances[peak] for peak in peaks])
# roll back to find true peak positions
true_peaks = np.array(peaks) + argmin
true_peaks[true_peaks>=len(sorted_points)] -= len(sorted_points)
# find end point of protrusions
protrusion_end_points = [sorted_points[peak] for peak in true_peaks]
for protrusion_end_point in protrusion_end_points:
print('new protrusion for cell mask {} for cell instance {}'.format(cell_mask.pk, cell_instance.pk))
relative_end_point = cell_centre - np.array(protrusion_end_point)
print(cell_centre, protrusion_end_point)
print('length from centre: {} microns'.format(np.linalg.norm(relative_end_point * series.scaling())))
print('orientation: {} degrees'.format(180 / math.pi * math.atan2(relative_end_point[0], relative_end_point[1])))
# plt.scatter([sorted_points[peak][1] for peak in true_peaks], [sorted_points[peak][0] for peak in true_peaks])
# plot outlines to check
plt.plot([point[1] for point in sorted_points], [point[0] for point in sorted_points], label='radius: 2')
# plt.scatter(points_c, points_r, label=cell_mask.channel.name, color=colours[i])
# plt.legend()
# plt.axis('equal')
plt.show()
else:
print('Please enter an experiment')
from scipy.ndimage.filters import gaussian_filter as gf
from scipy.interpolate import *
from scipy import integrate
import numpy as np
import pylab
import matplotlib.pyplot as plt
import matplotlib.image as pim
import math
import interpimage
import time
from matplotlib.widgets import Button
sigma = 5
im1=np.array(Image.open('images/blacksquare.png'), dtype=float)
gauss=gf(im1,sigma,2)
alpha = 0.51
beta = 1
gamma = 5
ts = 100
points = 500
thrs = 30
#Apply gaussian
Ix=gf(im1,sigma,(1,0))
Iy=gf(im1,sigma,(0,1))
Ixx=gf(im1,sigma,(2,0))
Iyy=gf(im1,sigma,(0,2))
Ixy=gf(im1,sigma,(1,1))
a = np.zeros((nc,nc),dtype=np.float32)
zl = xv.min() - 5.0
zu = xv.max() + 5.0
yl = yv.min() - 5.0
yu = yv.max() + 5.0
lz = zu - zl
ly = yu - yl
print lz, ly
dz = lz/nc
dy = -ly/nc # Because "y" coordinate increases in opposite direction to "y" array index of a (or a2).
def zloc(cood):
return int((cood-zl)/dz) + 1
def yloc(cood):
return int((cood-yl)/dy) + 1
for i in xrange(xv.size):
zpos = zloc(xv[i])
ypos = yloc(yv[i])
a[ypos, zpos] += 1.0
a2 = gf(a, 1.0)
save_data = False
if save_data:
a2.tofile('mockdata_3d_nc100.dat') # Save for fitjet_3d.py
plt.imshow(a2, cmap=cm.Blues)
plt.show()