Пример #1
0
def main():
    normalized = i3.normalize(ct_series,
                              dfs,
                              obs,
                              workdir=os.path.join(workdir, 'normalization'))
    tilt_corrected = i3.correct_tilt(normalized,
                                     workdir=os.path.join(
                                         workdir, 'tilt-correction'))
    if_corrected = i3.correct_intensity_fluctuation(
        tilt_corrected,
        workdir=os.path.join(workdir, 'intensity-fluctuation-correction'))
    angles, sinograms = i3.build_sinograms(if_corrected,
                                           workdir=os.path.join(
                                               workdir, 'sinogram'))
    # take the middle part to calculate the center of rotation
    sino = [s.data for s in sinograms[900:1100]]
    sino = np.array(sino)
    proj = np.swapaxes(sino, 0, 1)
    rot_center = tomopy.find_center(proj,
                                    theta,
                                    emission=False,
                                    init=1024,
                                    tol=0.5)
    rot_center = rot_center[0]
    # reconstruct
    recon = i3.reconstruct(angles,
                           sinograms,
                           workdir=outdir,
                           center=rot_center)
    return
Пример #2
0
def test():
    normalized = i3.normalize(ct_series, dfs, obs, workdir=workdir)
    tilt_corrected = i3.correct_tilt(normalized, workdir=workdir)
    if_corrected = i3.correct_intensity_fluctuation(tilt_corrected,
                                                    workdir=workdir)
    angles, sinograms = i3.build_sinograms(if_corrected, workdir=workdir)
    recon = i3.reconstruct(angles, sinograms, workdir=outdir)
    return
Пример #3
0
def main():
    normalized = i3.normalize(ct_series, dfs, obs, workdir=os.path.join(workdir, 'normalization'))
    tilt_corrected = i3.correct_tilt(normalized, workdir=os.path.join(workdir, 'tilt-correction'))
    if_corrected = i3.correct_intensity_fluctuation(tilt_corrected, workdir=os.path.join(workdir, 'intensity-fluctuation-correction'))
    angles, sinograms = i3.build_sinograms(if_corrected, workdir=os.path.join(workdir, 'sinogram'))
    # take the middle part to calculate the center of rotation
    sino = [s.data for s in sinograms[900:1100]]
    sino= np.array(sino)
    proj = np.swapaxes(sino, 0, 1)
    rot_center = tomopy.find_center(proj, theta, emission=False, init=1024, tol=0.5)
    rot_center = rot_center[0]
    # reconstruct
    recon = i3.reconstruct(angles, sinograms, workdir=outdir, center=rot_center)
    return
Пример #4
0
 def reconstruct(
         self, 
         ct_series, workdir=None, outdir=None,
         rot_center=None, explore_rot_center=True):
     workdir = workdir or self.workdir;  
     outdir = outdir or self.outdir
     theta = self.theta
     # preprocess
     angles, sinograms = i3.build_sinograms(
         ct_series, workdir=os.path.join(workdir, 'sinogram'),
         parallel = self.parallel_preprocessing,
         parallel_nodes = self.parallel_nodes)
     # take the middle part to calculate the center of rotation
     NSINO = len(sinograms)
     sino = [s.data for s in sinograms[NSINO//3: NSINO*2//3]]
     # sino = [s.data for s in sinograms]
     sino= np.array(sino)
     proj = np.swapaxes(sino, 0, 1)
     import tomopy
     X = proj.shape[-1]
     DEVIATION = 40 # max deviation of rot center from center of image
     if explore_rot_center:
         print("* Exploring rotation center using tomopy...")
         tomopy.write_center(
             proj.copy(), theta,
             cen_range=[X//2-DEVIATION, X//2+DEVIATION, 1.],
             dpath=os.path.join(workdir, 'tomopy-findcenter'),
             emission=False)
     if rot_center is None:
         print("* Computing rotation center using 180deg pairs...")
         from .tilt import find_rot_center
         rot_center = find_rot_center.find(
             ct_series, workdir=os.path.join(workdir, 'find-rot-center'))
     print('* Rotation center: %s' % rot_center)
     open(os.path.join(workdir, 'rot_center'), 'wt').write(str(rot_center))
     # reconstruct 
     if self.vertical_range:
         sinograms = sinograms[self.vertical_range]
     recon = i3.reconstruct(
         angles, sinograms, 
         workdir=outdir, center=rot_center,
         nodes=self.parallel_nodes)
     return
Пример #5
0
 def reconstruct(
         self, 
         ct_series, workdir=None, outdir=None,
         rot_center=None, explore_rot_center=True,
         outfilename_template=None,
         remove_rings_at_sinograms=False,
         mirror=True,
         **kwds):
     workdir = workdir or self.workdir;  
     outdir = outdir or self.outdir
     theta = self.theta
     # preprocess
     angles, sinograms = i3.build_sinograms(
         ct_series, workdir=os.path.join(workdir, 'sinogram'),
         parallel = self.parallel_preprocessing,
         parallel_nodes = self.parallel_nodes)
     # take the middle part to calculate the center of rotation
     NSINO = len(sinograms)
     sino = [s.data for s in sinograms[NSINO//3: NSINO*2//3]]
     # sino = [s.data for s in sinograms]
     sino= np.array(sino)
     proj = np.swapaxes(sino, 0, 1)
     import tomopy
     X = proj.shape[-1]
     DEVIATION = 40 # max deviation of rot center from center of image
     if explore_rot_center:
         print("* Exploring rotation center using tomopy...")
         dpath=os.path.join(workdir, 'tomopy-findcenter')
         if not os.path.exists(dpath): # skip if already done
             tomopy.write_center(
                 proj.copy(), theta,
                 cen_range=[X//2-DEVIATION, X//2+DEVIATION, 1.],
                 dpath=dpath,
                 emission=False)
     if rot_center is None:
         print("* Computing rotation center using 180deg pairs...")
         from .tilt import find_rot_center
         rot_center = find_rot_center.find(
             ct_series, workdir=os.path.join(workdir, 'find-rot-center'))
     print('* Rotation center: %s' % rot_center)
     self.rot_center = rot_center
     open(os.path.join(workdir, 'rot_center'), 'wt').write(str(rot_center))
     # reconstruct 
     if self.vertical_range:
         sinograms = sinograms[self.vertical_range]
     self.r.sinograms = sinograms
     # sometimes the rotation angles and the stacking sequence coulb be not in the right convention
     if mirror:
         angles = -np.array(angles)
     # reconstruct using original sinograms
     recon = i3.reconstruct(
         angles, sinograms, 
         workdir=outdir, filename_template=outfilename_template,
         center=rot_center,
         nodes=self.parallel_nodes,
         **kwds)
     self.r.reconstructed = recon
     # reconstruct using rar filtered sinograms
     if remove_rings_at_sinograms:
         if remove_rings_at_sinograms is True:
             remove_rings_at_sinograms = {}
         self.r.rar_sino = sinograms = i3.ring_artifact_removal_Ketcham(
             sinograms, workdir=os.path.join(workdir, 'rar_sinograms'),
             parallel = self.parallel_preprocessing,
             **remove_rings_at_sinograms)
         recon = i3.reconstruct(
             angles, sinograms, 
             workdir=os.path.join(outdir, 'rar_sinograms'),
             filename_template=outfilename_template,
             center=rot_center,
             nodes=self.parallel_nodes,
             **kwds)
         self.r.reconstructed_using_rar_sinograms = recon
     return recon