def precomputeWeights(self, pw_id, tmpV_id, prjD_id, lw_id):
if self.precomputed:
return
#Compute and invert the lineweights
astra.data3d.store(lw_id, 0)
astra.data3d.store(tmpV_id, 1)
self.performFP(lw_id, tmpV_id)
mpi.run(self.opInvert, [lw_id])
#Compute and invert the pixelweights
astra.data3d.store(pw_id, 0)
astra.data3d.store(prjD_id, 1)
self.performBP(prjD_id, pw_id)
mpi.run(self.opInvert, [pw_id])
self.precomputed = True
def grad3(src_id, gradX_id, gradY_id, gradZ_id, scale=None):
"""
Compute discrete gradients in X, Y, Z directions.
All four IDs must be mpi/distributed data3d volumes of the same
dimensions.
If scale is specified, the output is multiplied by scale.
:param src_id: ID of input volume
:type src_id: :class:`int`
:param gradX_id: ID of output volume for gradient in X direction
:type gradX_id: :class:`int`
:param gradY_id: ID of output volume for gradient in Y direction
:type gradY_id: :class:`int`
:param gradZ_id: ID of output volume for gradient in Z direction
:type gradZ_id: :class:`int`
:param scale: if specified, multiply output by this
:type scale: :class:`float`
"""
def _grad3_internal(src_id, gradX_id, gradY_id, gradZ_id, scale):
dataS = astra.data3d.get_shared_local(src_id)
dataDX = astra.data3d.get_shared_local(gradX_id)
dataDY = astra.data3d.get_shared_local(gradY_id)
dataDZ = astra.data3d.get_shared_local(gradZ_id)
dataDX[:] = dataS
dataDX[1:, :, :] -= dataS[0:-1, :, :]
if scale is not None:
dataDX *= scale
dataDY[:] = dataS
dataDY[1:, :, :] -= dataS[0:-1, :, :]
if scale is not None:
dataDY *= scale
dataDZ[:] = dataS
dataDZ[1:, :, :] -= dataS[0:-1, :, :]
if scale is not None:
dataDZ *= scale
mpi.run(_grad3_internal, [src_id, gradX_id, gradY_id, gradZ_id, scale])
astra.data3d.sync(gradX_id)
astra.data3d.sync(gradY_id)
astra.data3d.sync(gradZ_id)
def linear_combination(out_id, a, id1, b, id2):
"""
Evaluate out_id = a * id1 + b * id2
All three IDs must be mpi/distributed data3d volumes of the same
dimensions.
out_id and/or id1 and/or id2 are allowed to be the same.
"""
def _lincomb_internal(out_id, a, id1, b, id2):
# TODO: Allow setting number of threads used by numexpr somehow
import numexpr
c = astra.data3d.get_shared_local(id1)
d = astra.data3d.get_shared_local(id2)
dst = astra.data3d.get_shared_local(out_id)
numexpr.evaluate("a*c + b*d", out=dst)
mpi.run(_lincomb_internal,
[out_id, np.float32(a), id1,
np.float32(b), id2])
def run(self, iters):
#Retrieve the geometry and use it to allocate temporary buffers
vol_geom = astra.data3d.get_geometry(self.rec_id)
proj_geom = astra.data3d.get_geometry(self.prj_id)
pixelWeight_id = astra.data3d.create('-vol', vol_geom)
tmpVolume_id = astra.data3d.create('-vol', vol_geom)
projData_id = astra.data3d.create('-sino', proj_geom)
lineWeight_id = astra.data3d.create('-sino', proj_geom)
#Compute the weights before we start the iteration steps
self.precomputeWeights(pixelWeight_id, tmpVolume_id, projData_id,
lineWeight_id)
#Iterate
for i in range(iters):
#FP part
astra.data3d.store(projData_id, 0)
self.performFP(projData_id, self.rec_id)
mpi.run(self.opAddScaledMulScalar,
[projData_id, self.prj_id, 1.0, -1.0])
mpi.run(self.opMul, [projData_id, lineWeight_id])
#BP part
astra.data3d.store(tmpVolume_id, 0)
self.performBP(projData_id, tmpVolume_id)
mpi.run(self.opAddMul, [self.rec_id, tmpVolume_id, pixelWeight_id])
def grad3_adj(dst_id, gradX_id, gradY_id, gradZ_id, scale=None):
"""
Compute adjoint of grad3.
All four IDs must be mpi/distributed data3d volumes of the same
dimensions.
If scale is specified, the output is multiplied by scale.
:param dst_id: ID of output volume
:type dst_id: :class:`int`
:param gradX_id: ID of input volume with gradient in X direction
:type gradX_id: :class:`int`
:param gradY_id: ID of input volume with gradient in Y direction
:type gradY_id: :class:`int`
:param gradZ_id: ID of input volume with gradient in Z direction
:type gradZ_id: :class:`int`
:param scale: if specified, multiply output by this
:type scale: :class:`float`
"""
def _grad3_adj_internal(dst_id, gradX_id, gradY_id, gradZ_id, scale):
dataSX = astra.data3d.get_shared_local(gradX_id)
dataSY = astra.data3d.get_shared_local(gradY_id)
dataSZ = astra.data3d.get_shared_local(gradZ_id)
dataD = astra.data3d.get_shared_local(dst_id)
dataD[:] = dataSX
dataD[0:-1, :, :] -= dataSX[1:, :, :]
dataD += dataSY
dataD[:, 0:-1, :] -= dataSY[:, 1:, :]
dataD += dataSZ
dataD[:, :, 0:-1] -= dataSZ[:, :, 1:]
if scale is not None:
dataD *= scale
mpi.run(_grad3_adj_internal, [dst_id, gradX_id, gradY_id, gradZ_id, scale])
astra.data3d.sync(dst_id)
def dot(id1, id2):
"""
Compute dot product of the volumes id1, id2.
Both IDs must be mpi/distributed data3d volumes of the same
dimensions.
:param id1: ID of first volume
:type id1: :class:`int`
:param id2: ID of second volume
:type id2: :class:`int`
:returns: :class:`float` -- The dot product of the two volumes
"""
def _dot_internal(id1, id2):
d1 = astra.data3d.get_shared_local(id1)
d2 = astra.data3d.get_shared_local(id2)
# Only look at the slices we're actually responsible
# for, to avoid duplicating the overlapping slices.
s = mpi.getObjectResponsibleSlices(id1)
return np.dot(d1[s].ravel(), d2[s].ravel())
return sum(mpi.run(_dot_internal, [id1, id2]))
def run(self, iters):
print("Hello World, running the Segmentation plugin")
# Set up the SIRT reconstruction and run it
cfg = astra.astra_dict('SIRT3D_CUDA')
#cfg = astra.astra_dict('CGLS3D_CUDA')
cfg['ReconstructionDataId'] = self.rec_id
cfg['ProjectionDataId'] = self.prj_id
alg_id = astra.algorithm.create(cfg)
astra.algorithm.run(alg_id, self.sirta_iter)
astra.algorithm.delete(alg_id)
vol_geom = astra.data3d.get_geometry(self.rec_id)
proj_geom = astra.data3d.get_geometry(self.prj_id)
mask_id = astra.data3d.create('-vol', vol_geom)
seg_id = astra.data3d.create('-vol', vol_geom)
tempVol_id = astra.data3d.create('-vol', vol_geom)
tempPrj_id = astra.data3d.create('-proj3d', proj_geom)
for iter in range(self.segment_iter):
mpi.run(self.segmentData, [self.segment_rho, self.segment_tau, self.rec_id, seg_id])
astra.data3d.sync(seg_id)
print("Mark borders")
mpi.run(self.markSegmentBorders2, [seg_id, mask_id])
print("Mark borders, done")
#TODO random mask pixels
mpi.run(self.subMulArray,[mask_id, seg_id, tempVol_id, 1.0])
astra.data3d.sync(tempVol_id)
cfg = astra.astra_dict('FP3D_CUDA')
cfg['VolumeDataId'] = tempVol_id
cfg['ProjectionDataId'] = tempPrj_id
alg_id = astra.algorithm.create(cfg)
astra.algorithm.run(alg_id)
astra.algorithm.delete(alg_id)
mpi.run(self.opArray,[self.prj_id, tempPrj_id, tempPrj_id, operator.sub])
astra.data3d.sync(tempPrj_id)
mpi.run(self.opArray,[self.rec_id, mask_id, self.rec_id, operator.mul])
astra.data3d.sync(self.rec_id)
#tempPrj_id = sino - FP ( (1-mask_id) * seg_id) #sino is prj_id
#x = rec_id * (mask)
cfg = astra.astra_dict('SIRT3D_CUDA')
cfg['ReconstructionDataId'] = self.rec_id
cfg['ProjectionDataId'] = tempPrj_id
cfg['option'] = {'ReconstructionMaskId' : mask_id }
alg_id = astra.algorithm.create(cfg)
astra.algorithm.run(alg_id, self.sirtb_iter)
astra.algorithm.delete(alg_id)
mpi.run(self.opArray,[tempVol_id, self.rec_id, self.rec_id, operator.add])
astra.data3d.sync(self.rec_id)
#rec = tempVol_id + rec_id
#rec = seg_id *(1-mask_id) + rec_id
mpi.run(self.segmentData, [self.segment_rho, self.segment_tau, self.rec_id, self.rec_id])
astra.algorithm.run(alg_id, sirta_iter)
data3 = astra.data3d.get(rec_id)
pylab.figure(1)
pylab.imshow(data3[:, :, 65])
#Release SIRT memory
astra.algorithm.delete(alg_id)
mask_id = astra.data3d.create('-vol', vol_geom)
seg_id = astra.data3d.create('-vol', vol_geom)
tempVol_id = astra.data3d.create('-vol', vol_geom)
tempPrj_id = astra.data3d.create('-proj3d', proj_geom)
for iter in range(0, segment_iter):
mpi.run(segmentData, [segment_rho, segment_tau, rec_id, seg_id])
astra.data3d.sync(seg_id)
#"Mark borders"
mpi.run(markSegmentBorders2, [seg_id, mask_id])
#Random mask pixels, not implemented in this example
mpi.run(subMulArray, [mask_id, seg_id, tempVol_id, 1.0])
astra.data3d.sync(tempVol_id)
cfg = astra.astra_dict('FP3D_CUDA')
cfg['VolumeDataId'] = tempVol_id
cfg['ProjectionDataId'] = tempPrj_id
alg_id = astra.algorithm.create(cfg)
astra.algorithm.run(alg_id)
astra.algorithm.delete(alg_id)
#Setup the MPI domain distribution
proj_geom, vol_geom = mpi.create(proj_geom,
vol_geom,
nGhostcellsVolume=5,
nGhostcellsProjection=0)
proj_id = astra.data3d.create('-proj3d', proj_geom)
rec_id = astra.data3d.create('-vol', vol_geom)
#Use imSize2 when reading source images that have already been downScaled
imSize2 = [imSize[0] / downScaleFactor, imSize[1] / downScaleFactor]
imSize2 = imSize #Using the original source images
#let each process read their own subset of data
mpi.run(readDistributedData, ['angles', filepath, filename, imSize2, proj_id])
# Set up the parameters for a reconstruction algorithm using the GPU
cfg = astra.astra_dict('SIRT3D_CUDA')
#cfg = astra.astra_dict('CGLS3D_CUDA')
cfg['ReconstructionDataId'] = rec_id
cfg['ProjectionDataId'] = proj_id
# Create the algorithm object from the configuration structure
alg_id = astra.algorithm.create(cfg)
# Run 150 iterations of the algorithm
astra.algorithm.run(alg_id, 150)
#Each process writes their own piece of result data
filepath = '/media/Data1/PUFoam_17.7um/VolumeJB/'