def locate_peaks(self):
peaks = {}
for idx in xrange(self.numfiles):
self.set_active_index(idx)
CC = cv_funcs.xcorr(self.template_data.get_data("imagedata"),
self.get_active_image())
#
pks = pc.two_dim_findpeaks((CC - CC.min()) * 255, xc_filter=False)
pks[:, 2] = pks[:, 2] / 255 + CC.min()
peaks[self.get_active_name()] = pks
self.peaks = peaks
def locate_peaks(self):
peaks={}
for idx in xrange(self.numfiles):
self.set_active_index(idx)
CC = cv_funcs.xcorr(self.template_data.get_data("imagedata"),
self.get_active_image())
#
pks=pc.two_dim_findpeaks((CC-CC.min())*255, xc_filter=False)
pks[:,2]=pks[:,2]/255+CC.min()
peaks[self.get_active_name()]=pks
self.peaks=peaks
def locate_peaks(self):
peaks={}
for idx in xrange(self.numfiles):
self.set_active_index(idx)
CC = cv_funcs.xcorr(self.template_data.get_data("imagedata"),
self.get_active_image())
#
pks=pc.two_dim_findpeaks((CC-CC.min())*255, medfilt_radius=None, alpha=1,
coords_list=[],
)
pks=pc.flatten_peak_list(pks)
pks[:,2]=pks[:,2]/255+CC.min()
peaks[self.get_active_name()]=pks
self.peaks=peaks
def _peak_attribs_stack(self, stack, peak_width, target_locations=None,
target_neighborhood=20, medfilt_radius=5,
mask = True):
"""
Characterizes the peaks in a stack of images.
Parameters:
----------
peak_width : int (required)
expected peak width. Too big, and you'll include other peaks
in measurements.
target_locations : numpy array (n x 2)
array of n target locations. If left as None, will create
target locations by locating peaks on the average image of the stack.
default is None (peaks detected from average image)
img_size : tuple, 2 elements
(width, height) of images in image stack.
target_neighborhood : int
pixel neighborhood to limit peak search to. Peaks outside the
square defined by 2x this value around the peak will be excluded
from any fitting.
medfilt_radius : int (optional)
median filter window to apply to smooth the data
(see scipy.signal.medfilt)
if 0, no filter will be applied.
default is set to 5
Returns:
-------
2D numpy array:
- One column per image
- 9 rows per peak located
0,1 - location
2,3 - difference between location and target location
4 - height
5 - orientation
6 - eccentricity
7,8 - skew X, Y, respectively
"""
avgImage=np.average(stack,axis=0)
if target_locations is None:
# get peak locations from the average image
# an initial value for the peak width of 11 pixels works
# OK to find initial peaks. We determine a proper value
# soon.
target_locations=pc.two_dim_findpeaks(avgImage, 10)
peak_width = 0.75*pc.min_peak_distance(target_locations)
if peak_width < 10:
peak_width = 10
if mask:
mask = pc.draw_mask(avgImage.shape,
peak_width/2.0,
target_locations)
stack *= mask
# get all peaks on all images
peaks=pc.stack_coords(stack, peak_width=peak_width)
# two loops here - outer loop loops over images (i index)
# inner loop loops over target peak locations (j index)
peak_locations=np.array([[pc.best_match(peaks[:,:,i],
target_locations[j,:2],
target_neighborhood) \
for i in xrange(peaks.shape[2])] \
for j in xrange(target_locations.shape[0])])
# pre-allocate result array. 7 rows for each peak, 1 column for each image
rlt = np.zeros((9*peak_locations.shape[0],stack.shape[0]))
rlt_tmp = np.zeros((peak_locations.shape[0],7))
progress = ProgressDialog(title="Peak characterization progress",
message="Characterizing peaks on %d cells"%stack.shape[0],
max=int(stack.shape[0]), show_time=True, can_cancel=False)
progress.open()
for i in xrange(stack.shape[0]):
progress.update(int(i+1))
rlt_tmp=pc.peak_attribs_image(stack[i,:,:],
target_locations=peak_locations[:,i,:],
peak_width=peak_width,
medfilt_radius=medfilt_radius,
)
diff_coords=target_locations[:,:2]-rlt_tmp[:,:2]
for j in xrange(target_locations.shape[0]):
# peak position
rlt[ j*9 : j*9+2 ,i] = rlt_tmp[j,:2]
# difference in peak position relative to average
rlt[ j*9+2 : j*9+4 ,i] = diff_coords[j]
# height
rlt[ j*9+4 ,i]=rlt_tmp[j,2]
# orientation
rlt[ j*9+5 ,i]=rlt_tmp[j,3]
# eccentricity
rlt[ j*9+6 ,i]=rlt_tmp[j,4]
# skew (x and y)
rlt[ j*9+7 : j*9+9 ,i]=rlt_tmp[j,5:]
return rlt
def characterize(self, target_locations=None,
target_neighborhood=20,
medfilt_radius=5):
#print "Main thread?"
#print Application.instance().is_main_thread()
# disable the UI while we're running
self._toggle_UI(False)
#print
try:
# wipe out old results
self.chest.removeNode('/cell_peaks')
except:
# any errors will be because the table doesn't exist. That's OK.
pass
# locate peaks on the average image to use as target locations.
# also determines the number of peaks, which in turn determines
# the table columns.
target_locations = pc.two_dim_findpeaks(self._get_average_image(),
)[:,:2]
self.numpeaks = int(target_locations.shape[0])
# generate a list of column names
names = [('x%i, y%i, dx%i, dy%i, h%i, o%i, e%i, sx%i, sy%i' % ((x,)*9)).split(', ')
for x in xrange(self.numpeaks)]
# flatten that from a list of lists to a simple list
names = [item for sublist in names for item in sublist]
# make tuples of each column name and 'f8' for the data type
dtypes = zip(names, ['f8', ] * self.numpeaks*9)
# prepend the filename and index columns
dtypes = [('filename', '|S250'), ('file_idx', 'i4'), ('omit', 'bool')] + dtypes
# create an empty recarray with our data type
desc = np.recarray((0,), dtype=dtypes)
# create the table using the empty description recarray
self.chest.createTable(self.chest.root,
'cell_peaks', description=desc)
# for each file in the cell_data group, run analysis.
nodes = self.chest.listNodes('/cells')
node_names = [node.name for node in nodes]
progress = ProgressDialog(title="Peak characterization progress",
message="Characterizing peaks on %d images"%(len(node_names)-2),
max=len(node_names)-1, show_time=True, can_cancel=False)
progress.open()
file_progress=0
for node in node_names:
# exclude some nodes
if node == 'template':
continue
cell_data = self.get_cell_set(node)
data = np.zeros((cell_data.shape[0]),dtype=dtypes)
data['filename'] = node
data['file_idx'] = np.arange(cell_data.shape[0])
# might want to tweak this loop or cythonize for speed...
attribs = self._peak_attribs_stack(cell_data,
peak_width=self.peak_width,
target_locations=target_locations,
target_neighborhood=target_neighborhood,
medfilt_radius=medfilt_radius)
attribs = attribs.T
# for each column name, copy in the data
for name_idx in xrange(len(names)):
data[names[name_idx]] = attribs[:, name_idx]
# add the data to the table
self.chest.root.cell_peaks.append(data)
self.chest.root.cell_peaks.flush()
file_progress+=1
progress.update(file_progress)
# add an attribute for the total number of peaks recorded
self.chest.setNodeAttr('/cell_peaks','number_of_peaks', self.numpeaks)
self.chest.root.cell_peaks.flush()
self.chest.flush()
self._can_show_peak_ids = True
self.parent.image_controller.update_peak_map_choices()
self._progress_value = 0
self.log_action(action="Characterize peaks",
target_locations=target_locations,
target_neighborhood=target_neighborhood,
medfilt_radius=medfilt_radius)
self._toggle_UI(True)
def map_global_peaks_to_cells(self):
try:
# wipe out old results
self.chest.remove_node('/cell_peaks')
except:
# any errors will be because the table doesn't exist. That's OK.
pass
# get the average cell image and find peaks on it
peaks=pc.two_dim_findpeaks(self.cell_controller.get_average_cell(),
xc_filter=False, kill_edges=False)
# generate a list of column names
names = [('x%i, y%i, dx%i, dy%i, h%i, o%i, e%i, sx%i, sy%i' % ((x,)*9)).split(', ')
for x in xrange(peaks.shape[0])]
# flatten that from a list of lists to a simple list
names = [item for sublist in names for item in sublist]
# make tuples of each column name and 'f8' for the data type
dtypes = zip(names, ['f8', ] * peaks.shape[0]*9)
# prepend the filename and index columns
dtypes = [('filename', '|S250'), ('file_idx', 'i4'), ('omit', 'bool')] + dtypes
# create an empty recarray with our data type
desc = np.recarray((0,), dtype=dtypes)
# create the table using the empty description recarray
self.chest.create_table(self.chest.root,
'cell_peaks', description=desc)
self.chest.set_node_attr('/cell_peaks','number_of_peaks', peaks.shape[0])
self.chest.flush()
# loop over each peak, finding the peak that best matches this cell's position
# plus the offset for the peak.
for node in self.image_controller.get_node_iterator():
cell_data = self.cell_controller.get_cell_set(node.name)
data = np.zeros((cell_data.shape[0]),dtype=dtypes)
data["filename"] = node.name
data['file_idx'] = np.arange(cell_data.shape[0])
for idx, peak in enumerate(peaks):
#TODO: need to rework this whole get_expression_data concept. It is
# a column accessor.
target_x = self.image_controller.get_expression_data("x_coordinate",
table_loc="/cell_description",
filename=node.name)+peak[0]
target_y = self.image_controller.get_expression_data("y_coordinate",
table_loc="/cell_description",
filename=node.name)+peak[1]
if target_x.shape[0]>0:
chars = self.find_best_matching_global_peaks(np.array([target_x,target_y]).T,
node.name)
# add the peak ids (or data) to table representing cell peak characteristics
data["x%i"%idx] = chars["x"]-target_x+peak[0]
data["y%i"%idx] = chars["y"]-target_y+peak[1]
data["dx%i"%idx] = chars["x"]-target_x
data["dy%i"%idx] = chars["y"]-target_y
data["h%i"%idx] = chars["h"]
data["o%i"%idx] = chars["o"]
data["e%i"%idx] = chars["e"]
data["sx%i"%idx] = chars["sx"]
data["sy%i"%idx] = chars["sy"]
# commit the data to the table
self.chest.root.cell_peaks.append(data)
self.chest.root.cell_peaks.flush()
self.chest.flush()
self.cell_controller._can_show_peak_ids=True
def map_global_peaks_to_cells(self):
try:
# wipe out old results
self.chest.remove_node('/cell_peaks')
except:
# any errors will be because the table doesn't exist. That's OK.
pass
# get the average cell image and find peaks on it
peaks = pc.two_dim_findpeaks(self.cell_controller.get_average_cell(),
xc_filter=False,
kill_edges=False)
# generate a list of column names
names = [('x%i, y%i, dx%i, dy%i, h%i, o%i, e%i, sx%i, sy%i' %
((x, ) * 9)).split(', ') for x in xrange(peaks.shape[0])]
# flatten that from a list of lists to a simple list
names = [item for sublist in names for item in sublist]
# make tuples of each column name and 'f8' for the data type
dtypes = zip(names, [
'f8',
] * peaks.shape[0] * 9)
# prepend the filename and index columns
dtypes = [('filename', '|S250'), ('file_idx', 'i4'),
('omit', 'bool')] + dtypes
# create an empty recarray with our data type
desc = np.recarray((0, ), dtype=dtypes)
# create the table using the empty description recarray
self.chest.create_table(self.chest.root,
'cell_peaks',
description=desc)
self.chest.set_node_attr('/cell_peaks', 'number_of_peaks',
peaks.shape[0])
self.chest.flush()
# loop over each peak, finding the peak that best matches this cell's position
# plus the offset for the peak.
for node in self.image_controller.get_node_iterator():
cell_data = self.cell_controller.get_cell_set(node.name)
data = np.zeros((cell_data.shape[0]), dtype=dtypes)
data["filename"] = node.name
data['file_idx'] = np.arange(cell_data.shape[0])
for idx, peak in enumerate(peaks):
#TODO: need to rework this whole get_expression_data concept. It is
# a column accessor.
target_x = self.image_controller.get_expression_data(
"x_coordinate",
table_loc="/cell_description",
filename=node.name) + peak[0]
target_y = self.image_controller.get_expression_data(
"y_coordinate",
table_loc="/cell_description",
filename=node.name) + peak[1]
if target_x.shape[0] > 0:
chars = self.find_best_matching_global_peaks(
np.array([target_x, target_y]).T, node.name)
# add the peak ids (or data) to table representing cell peak characteristics
data["x%i" % idx] = chars["x"] - target_x + peak[0]
data["y%i" % idx] = chars["y"] - target_y + peak[1]
data["dx%i" % idx] = chars["x"] - target_x
data["dy%i" % idx] = chars["y"] - target_y
data["h%i" % idx] = chars["h"]
data["o%i" % idx] = chars["o"]
data["e%i" % idx] = chars["e"]
data["sx%i" % idx] = chars["sx"]
data["sy%i" % idx] = chars["sy"]
# commit the data to the table
self.chest.root.cell_peaks.append(data)
self.chest.root.cell_peaks.flush()
self.chest.flush()
self.cell_controller._can_show_peak_ids = True
