def simulate_2d_gaussian_psf(sizes, steps, starts, centre, width, depth_dependent_width):
"""simulate the image of point source at location centre in
translated along dimension l and having a gaussian profile in x
with a minimum width specified by width and an optional l (or
depth dependence)
sizes : (Nx, Nl) dimensions of simulated image
steps : (sx, sl) voxel size in x and l dimensions
starts : (cx, cl) centre of 0,0 voxel
width : width in x of gaussian
depth_dependent_width : additional width term which is proportional to l-cl and combines in quadrature with base width
"""
# alloc array
img = py_minc.ArrayVolume((1, sizes[0], sizes[1]), dimension_names = ('zspace', 'xspace', 'lspace'),
nc_data_type = py_minc.NC_SHORT, typecode = float_)
img.set_starts((0, starts[0], starts[1]))
img.set_separations((1, steps[0], steps[1]))
# iterate over voxels
for j in range(sizes[1]):
l = starts[1] + j*steps[1]
dl = l - centre[1] # coordinate relative to focal plane
combined_width_sq = width**2 + (dl*depth_dependent_width)**2
c = 1.0/sqrt(2*pi*combined_width_sq)
for i in range(sizes[0]):
x = starts[0] + i*steps[0]
dx = x - centre[0] # coordinate relative to centre
img.array[0,i,j] = c*exp(-.5*dx**2/combined_width_sq) # evaluate gaussian
return img
def simulate_point_sinogram(sizes, steps, starts, psf, position):
"""simulate the sinogram generated by a point at specified position that is degrade by the specified psf
sizes : (Nx, Nphi) dimensions of image
steps : (sx, sphi) voxel size in x and l dimensions
starts : (cx, cphi) centre of 0,0 voxel
psf : ArrayVolume specifying psf
position : position or point object
Note centre of rotation is assumed to be at x = 0, y = 0
"""
# alloc array
sino = py_minc.ArrayVolume((1, sizes[0], sizes[1]), dimension_names = ('zspace', 'xspace', 'phispace'),
nc_data_type = py_minc.NC_SHORT, typecode = float_)
sino.set_starts((0, starts[0], starts[1]))
sino.set_separations((1, steps[0], steps[1]))
# convert point location to polar coordinates
r = sqrt(position[0]**2+position[1]**2)
theta = arctan2(position[0], position[1])
psf_starts = psf.get_starts()
psf_steps = psf.get_separations()
psf_sizes = psf.get_sizes()
x_values = psf_starts[1] + arange(psf_sizes[1])*psf_steps[1]
l_values = psf_starts[2] + arange(psf_sizes[2])*psf_steps[2]
interp_psf = bilinear_interp(x_values, l_values, psf.array[0])
# iterate over angles
for j in range(sizes[1]):
phi = starts[1] + j*steps[1]
dphi = phi - theta # relative rotation of point
offset = r*sin(dphi) # compute position of rotated point in detector coord (x,l)
l = r*cos(dphi)
# iterate over detector elements
for i in range(sizes[0]):
x = starts[0] + i*steps[0]
dx = offset - x # coordinate relative to centre
sino.array[0,i,j] = interp_psf(dx, l)
return sino
def additional_seeding(mnc_bin_file, tag_file, all_tags):
print "****************** additional seeding : ", tag_file
#create distance_transform (binary input only)
cmnd = ("mincmorph -clobber -short -successive F %s %s > %s/tmp.log" %
(mnc_bin_file, mnc_bin_file[:-4] + "_dt.mnc",
os.path.dirname(os.path.abspath(mnc_bin_file))))
print cmnd
os.system(cmnd)
#p= subprocess.Popen(cmnd, shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True)
#stdout, stderr = p.communicate()
##p.wait()
volume_dt = py_minc.ArrayVolume(
mnc_bin_file[:-4] + "_dt.mnc"
) # without this always [z,y,x], with ,dim_names=py_minc.FILE_ORDER_DIMENSION_NAMES order as the image
size = volume_dt.get_sizes()
tags = py_minc.VolumeTags(1)
for z in range(size[0]):
for y in range(size[1]):
for x in range(size[2]):
dt_value = volume_dt.array[z, y, x]
if dt_value >= 0.5:
dt_value_world_location = volume_dt.convert_voxel_to_world(
np.array([z, y, x])) #return world in [x,y,z]
if not list(dt_value_world_location) in all_tags:
tags.append(dt_value_world_location, 1, 1, 1, 1)
if tags.number() > 0:
tags.output(tag_file)
print "****************** additional seeding : ", tag_file, " DONE! ", tags.number(
), " seeds created!\n"
return True
else:
print "****************** No additional seed can be added!\n"
return False
def newmincfile(dims,ord=(py_minc.MIzspace,py_minc.MIyspace,py_minc.MIxspace), \
ncdt=py_minc.NC_FLOAT,tc=float32):
a = py_minc.ArrayVolume(dims, ord, nc_data_type=ncdt, typecode=tc)
return a
def openmincfile(filename, dn=py_minc.FILE_ORDER_DIMENSION_NAMES, tc=int16):
a = py_minc.ArrayVolume(filename, dim_names=dn, typecode=tc)
return a
raise SystemExit, \
"The --clobber option is needed to overwrite an existing file."
try:
g, attributes = graph_analysis.input_graph(graph_file, ["history", "vertex_offsets"]) # open graph data and copy contents to memory
print ("Successfully read in the %s\n" %graph_file)
sys.stdout.flush()
except:
print("Error reading in the %s \n" %graph_file)
sys.stdout.flush()
#### mri_distance feature:
mri_atlas = py_minc.ArrayVolume(mr_atlas_file, nc_data_type=py_minc.NC_BYTE)# without this always [z,y,x], with ,dim_names=py_minc.FILE_ORDER_DIMENSION_NAMES order as the image
sizes = mri_atlas.get_sizes()
mri_labels =[]
for z_vox in range(sizes[0]):
for y_vox in range(sizes[1]):
for x_vox in range(sizes[2]):
if mri_atlas.array[z_vox,y_vox,x_vox]>0 and mri_atlas.array[z_vox,y_vox,x_vox] not in mri_labels:
mri_labels.append(mri_atlas.array[z_vox,y_vox,x_vox])
mri_labels=map(lambda x:int(round(x)), mri_labels)
for l in mri_labels:
#print "mri_label",l
sys.stdout.flush()
mri_atlas = py_minc.ArrayVolume(mr_atlas_file[:-4]+"_%d_dt.mnc" %l, nc_data_type=py_minc.NC_BYTE)# without this always voxels[z,y,x], with ,dim_names=py_minc.FILE_ORDER_DIMENSION_NAMES order as the image
for e in g.edge_list():
def buildPipeline(self):
#def create_subvolumes (minc_file,subvol_nums, overlap=10):
"""v0min v0max v1min v1max v2min v2max",
only process a subvolume specified by the bounds in voxel coordinates: v0min <= v0 < v0max, v1min <= v1 < v1max, v2min <= v2 < v2max"
create subvolumes 6 parameters to be passed to each parallel process of vesselTracking."""
v0min = [] #x
v0max = [] #x
v1min = [] #y
v1max = [] #y
v2min = [] #z
v2max = [] #z
#img = pymincf.volumeFromFile(self.minc_file)
#sizes = img.getSizes() # z_vox(sizes[0]), y_vox(sizes[1]),x_vox(sizes[2])
#self.spacing = img.getSeparations()# z_vox(sizes[0]), y_vox(sizes[1]),x_vox(sizes[2])
#origin = img.getStarts()# z_vox(sizes[0]), y_vox(sizes[1]),x_vox(sizes[2])
img = py_minc.ArrayVolume(
self.minc_file
) # without this always [z,y,x], with ,dim_names=py_minc.FILE_ORDER_DIMENSION_NAMES order as the image
sizes = img.get_sizes(
) # z_vox(sizes[0]), y_vox(sizes[1]),x_vox(sizes[2])
self.spacing = img.get_separations(
) # z_vox(sizes[0]), y_vox(sizes[1]),x_vox(sizes[2])
origin = img.get_starts(
) # z_vox(sizes[0]), y_vox(sizes[1]),x_vox(sizes[2])
if self.subvol_nums > 27:
self.subvol_nums = 27
if self.subvol_nums < 1:
self.subvol_nums = 1
if self.subvol_nums == 1:
self.input_subvols.append(self.minc_file)
else:
[xdiv, ydiv, zdiv] = self.make_subvol_indx()
#### crop the mincfile into each subvolume
subv = 0
for i in range(xdiv):
for j in range(ydiv):
for k in range(zdiv):
subvol_minc_file = self.minc_file[:-4] + "_crop" + str(
subv) + ".mnc"
v0min = max(0, int(i * sizes[2] / xdiv) - self.overlap)
v0max = min(
sizes[2],
int((i + 1) * sizes[2] / xdiv) + self.overlap)
v1min = max(0, int(j * sizes[1] / ydiv) - self.overlap)
v1max = min(
sizes[1],
int((j + 1) * sizes[1] / ydiv) + self.overlap)
v2min = max(0, int(k * sizes[0] / zdiv) - self.overlap)
v2max = min(
sizes[0],
int((k + 1) * sizes[0] / zdiv) + self.overlap)
self.nel = [
v0max - v0min, v1max - v1min, v2max - v2min
] #x,y,z
self.strts = [
origin[2] + (v0min * self.spacing[2]),
origin[1] + (v1min * self.spacing[1]),
origin[0] + (v2min * self.spacing[0])
] #x,y,z
"""Resample minc_file into space of subvol_minc_file
Here, we add stages of the pipeline that is defined in the main file (subvolume_vessel_tracking)"""
if self.clobber or not file_exists(subvol_minc_file):
self.mincResampler(subvol_minc_file)
self.input_subvols.append(subvol_minc_file)
#resample = ma.mincresample(self.minc_file, subvol_minc_file, likeFile=self.minc_file, argArray=["-clobber", "-step %f %f %f" %(self.spacing[2],self.spacing[1],self.spacing[0]),"-nelements %d %d %d" %(self.nel[0],self.nel[1],self.nel[2]),"-start %f %f %f" %(self.strts[0],self.strts[1], self.strts[2])])
#self.p.addStage(resample)
#print self.p.cmd
#self.input_subvols.append(resample.outputFiles[0])
subv += 1
if not options.clobber and os.path.exists(output_file):
raise SystemExit, \
"The --clobber option is needed to overwrite an existing file."
# reads in the graph to be labeled
try:
g, attributes = graph_analysis.input_graph(
input_file, ["history", "vertex_offsets"])
print("Succefully read in the %s\n" % input_file)
except:
print("Error reading in the %s\n" % input_file)
# read in the labeled CT : used to make labling training dataset
#labeled_ct=py_minc.ArrayVolume(labeled_CT_file,dim_names=py_minc.FILE_ORDER_DIMENSION_NAMES) #which is in [x,y,z]
labeled_ct = py_minc.ArrayVolume(
labeled_CT_file
) # without this always [z,y,x], with this :dim_names=py_minc.FILE_ORDER_DIMENSION_NAMES order as the image
#
g = edge_labeling(g, labeled_ct)
#history = history + '\n>>> %s: %s' % (time.ctime(time.time()), "edge_labeling") ##argv = ['code.py', 'input.db', 'output']
history = '\n>>> %s: %s' % (time.ctime(time.time()), string.join(argv)
) ##argv = ['code.py', 'input.db', 'output']
if attributes.has_key("history"):
history = attributes["history"] + "\n" + history
del attributes['history']
graph_analysis.output_graph(output_file, g, history, attributes)
print("Succefully wrote the %s\n" % output_file)
g = label_propagate(g, 0)
#history = history + '\n>>> %s: %s' % (time.ctime(time.time()), "edge_labeling") ##argv = ['code.py', 'input.db', 'output']
from scipy import *
import py_minc
from scipy.optimize import leastsq
def gaussian(parameters, y, x):
a, b, c, d, e, f = parameters
asdf = e * exp(-((x - a) / b)**2) * exp(-((x - c) / d)**2) - f
err = y - asdf
return err
filen = 'exp7/sl0.mnc'
a = py_minc.ArrayVolume(filen, typecode=int16)
views, null, dets = a.get_sizes()
im1 = squeeze(a.array)[700:800, 100:200]
filen = 'exp7/sl399.mnc'
a = py_minc.ArrayVolume(filen, typecode=int16)
views, null, dets = a.get_sizes()
im2 = squeeze(a.array)[700:800, 100:200]
dlist = ravel(im1).tolist()
mx = max(ravel(im1))
flr = mean(ravel(im1))
ind = dlist.index(mx)
indx = ind / 100
indy = mod(ind, 100)
from scipy import * import py_minc fls = [ "exp2/slice448.mnc", "exp3/slice293.mnc", "exp4/slice286.mnc", "exp5/slice299.mnc", "exp6/slice1077.mnc", "exp7/slice746.mnc", "exp8/slice752.mnc", "exp9/slice793.mnc" ] psf_ffts = zeros((8,400,1036),Complex64) sgs = zeros((8,400,1036),float32) i = 0 for fl in fls: print "Analyzing", fl a = py_minc.ArrayVolume(fl,typecode=float32) b = squeeze(a.array) sgs[i,:,:] = b for j in range(400): psf_ffts[i,j,:] = fftshift(fft(fftshift(b[j,:]))) i = i + 1 inv = 1 def showwhere(im,fact=1.0): if(inv): imshow(-where(im>fact*max(ravel(im)),fact*max(ravel(im)),im)) else: imshow(where(im>fact*max(ravel(im)),fact*max(ravel(im)),im)) def showmag(num, fact=1.0):
#print "in R2" return mask ################################### ### MAIN STARTS HERE ############## ################################### slope = 0.6 max_intercept = 0.3*slope viewmax = 1/pi/2. detmax = 0.4 file = "exp3/slice293.mnc" a = py_minc.ArrayVolume(file) sg = squeeze(a.array) sg_fft = fftshift(fft2(fftshift(sg))) views, dets = shape(sg_fft) newsg_fft = zeros((views*3,dets),Complex64) newsg_fft[0:views,:] = sg_fft newsg_fft[views:views*2,:] = sg_fft newsg_fft[views*2:views*3,:] = sg_fft viewsgfft = where(abs(newsg_fft)>7000,7000,abs(newsg_fft)) newviews,newdets = shape(newsg_fft) mask = zeros(shape(newsg_fft),Int8)
def seeding(mnc_bin_file, tag_file, connectivity, all_tags):
print "****************** seeding : ", tag_file
#create distance_transform (binary input only)
cmnd = ("mincmorph -clobber -short -successive F %s %s > %s/tmp.log" %
(mnc_bin_file, mnc_bin_file[:-4] + "_dt.mnc",
os.path.dirname(os.path.abspath(mnc_bin_file))))
print cmnd
os.system(cmnd)
#p= subprocess.Popen(cmnd, shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True)
#stdout, stderr = p.communicate()
##p.wait()
#create group file
cmnd = ("mincmorph -clobber -short -group -%s %s %s > %s/tmp.log" %
(connectivity, mnc_bin_file, mnc_bin_file[:-4] + "_group.mnc",
os.path.dirname(os.path.abspath(mnc_bin_file))))
print cmnd
os.system(cmnd)
#p= subprocess.Popen(cmnd, shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True)
#stdout, stderr = p.communicate()
##p.wait()
dt_img = py_minc.ArrayVolume(
mnc_bin_file[:-4] + "_dt.mnc"
) # without this always [z,y,x], with ,dim_names=py_minc.FILE_ORDER_DIMENSION_NAMES order as the image
group_img = py_minc.ArrayVolume(
mnc_bin_file[:-4] + "_group.mnc"
) # without this always [z,y,x], with ,dim_names=py_minc.FILE_ORDER_DIMENSION_NAMES order as the image
sizes = dt_img.get_sizes()
#print "\n\nsize of ", group_filename," is ",sizes, "\n\n"
component_maximum = {}
for z_vox in range(sizes[0]):
for y_vox in range(sizes[1]):
for x_vox in range(sizes[2]):
g_value = int(round(group_img.array[z_vox, y_vox, x_vox]))
if g_value > 0:
dt_value = int(round(dt_img.array[z_vox, y_vox, x_vox]))
if g_value not in component_maximum.keys():
component_maximum[g_value] = [
dt_value, z_vox, y_vox, x_vox
]
else:
if dt_value > component_maximum[g_value][0]:
component_maximum[g_value] = [
dt_value, z_vox, y_vox, x_vox
]
#descending sort tag components based on value (dt_value)
sorted_component_maximum = sorted(
component_maximum.iteritems(),
key=operator.itemgetter(1),
reverse=True) #result is not dict, list of tuples=(key,val)
tags = py_minc.VolumeTags(1)
for i in range(len(sorted_component_maximum)):
voxel_location = np.array([
sorted_component_maximum[i][1][1],
sorted_component_maximum[i][1][2],
sorted_component_maximum[i][1][3]
])
world_location = dt_img.convert_voxel_to_world(voxel_location)
if not list(world_location) in all_tags:
tags.append(world_location, 0.05, 1, 1, 1)
all_tags.append(list(world_location))
if tags.number() > 0:
tags.output(tag_file)
print "****************** seeding : ", tag_file, " DONE! ", tags.number(
), " seeds created!\n"
return True, all_tags
else:
print "****************** No seed can be added!\n"
return False, all_tags
subpix_stepsize = 0.1
## THESE ARE ONLY TEMPORARY TEST VARIABLES, DON'T USE THESE IF REALLY RUNNING SCRIPT
views = 400
dets = 1036
slices = 1360
reconsize = 1036
from scipy import *
ff = zeros((views,dets),float32)
from tomography import projections
pj = projections.Projections()
pj.read("/tmp/mytest.pj")
dat = pj.get_data()
g1 = shape(dat)[1]
g2 = dets
left = (g1 - g2)/2 ## Note: These will always be even
right = (g1 + g2)/2 ## as it is either odd-odd or even-even
ff = dat[:,left:right]
import py_minc
a = py_minc.ArrayVolume("exp7/slice746.mnc")
ff = squeeze(a.array).astype(float32)
