diff options
Diffstat (limited to 'Wrappers/Python')
| -rw-r--r-- | Wrappers/Python/ccpi/astra/astra_processors.py | 130 | ||||
| -rw-r--r-- | Wrappers/Python/ccpi/astra/astra_utils.py | 61 | ||||
| -rw-r--r-- | Wrappers/Python/ccpi/reconstruction/astra_ops.py | 112 |
3 files changed, 216 insertions, 87 deletions
diff --git a/Wrappers/Python/ccpi/astra/astra_processors.py b/Wrappers/Python/ccpi/astra/astra_processors.py new file mode 100644 index 0000000..91612b1 --- /dev/null +++ b/Wrappers/Python/ccpi/astra/astra_processors.py @@ -0,0 +1,130 @@ +from ccpi.framework import DataSetProcessor, DataSet, VolumeData, SinogramData +from ccpi.astra.astra_utils import convert_geometry_to_astra +import astra + + +class AstraForwardProjector(DataSetProcessor): + '''AstraForwardProjector + + Forward project VolumeDataSet to SinogramDataSet using ASTRA proj_id. + + Input: VolumeDataSet + Parameter: proj_id + Output: SinogramDataSet + ''' + + def __init__(self, + volume_geometry=None, + sinogram_geometry=None, + proj_id=None, + device='cpu'): + kwargs = { + 'volume_geometry' : volume_geometry, + 'sinogram_geometry' : sinogram_geometry, + 'proj_id' : proj_id, + 'device' : device + } + + #DataSetProcessor.__init__(self, **kwargs) + super(AstraForwardProjector, self).__init__(**kwargs) + + self.setVolumeGeometry(volume_geometry) + self.setSinogramGeometry(sinogram_geometry) + + # Set up ASTRA Volume and projection geometry, not to be stored in self + vol_geom, proj_geom = convert_geometry_to_astra(self.volume_geometry, + self.sinogram_geometry) + + # ASTRA projector, to be stored + if device == 'cpu': + # Note that 'line' is only for parallel (2D) and only one option + self.setProjector(astra.create_projector('line', proj_geom, vol_geom) ) + elif device == 'gpu': + self.setProjector(astra.create_projector('cuda', proj_geom, vol_geom) ) + else: + NotImplemented + + def checkInput(self, dataset): + if dataset.number_of_dimensions == 3 or dataset.number_of_dimensions == 2: + return True + else: + raise ValueError("Expected input dimensions is 2 or 3, got {0}"\ + .format(dataset.number_of_dimensions)) + + def setProjector(self, proj_id): + self.proj_id = proj_id + + def setVolumeGeometry(self, volume_geometry): + self.volume_geometry = volume_geometry + + def setSinogramGeometry(self, sinogram_geometry): + self.sinogram_geometry = sinogram_geometry + + def process(self): + IM = self.getInput() + sinogram_id, DATA = astra.create_sino(IM.as_array(), self.proj_id) + astra.data2d.delete(sinogram_id) + return SinogramData(DATA,geometry=self.sinogram_geometry) + +class AstraBackProjector(DataSetProcessor): + '''AstraBackProjector + + Back project SinogramDataSet to VolumeDataSet using ASTRA proj_id. + + Input: SinogramDataSet + Parameter: proj_id + Output: VolumeDataSet + ''' + + def __init__(self, + volume_geometry=None, + sinogram_geometry=None, + proj_id=None, + device='cpu'): + kwargs = { + 'volume_geometry' : volume_geometry, + 'sinogram_geometry' : sinogram_geometry, + 'proj_id' : proj_id, + 'device' : device + } + + #DataSetProcessor.__init__(self, **kwargs) + super(AstraBackProjector, self).__init__(**kwargs) + + self.setVolumeGeometry(volume_geometry) + self.setSinogramGeometry(sinogram_geometry) + + # Set up ASTRA Volume and projection geometry, not to be stored in self + vol_geom, proj_geom = convert_geometry_to_astra(self.volume_geometry, + self.sinogram_geometry) + + # ASTRA projector, to be stored + if device == 'cpu': + # Note that 'line' is only for parallel (2D) and only one option + self.setProjector(astra.create_projector('line', proj_geom, vol_geom) ) + elif device == 'gpu': + self.setProjector(astra.create_projector('cuda', proj_geom, vol_geom) ) + else: + NotImplemented + + def checkInput(self, dataset): + if dataset.number_of_dimensions == 3 or dataset.number_of_dimensions == 2: + return True + else: + raise ValueError("Expected input dimensions is 2 or 3, got {0}"\ + .format(dataset.number_of_dimensions)) + + def setProjector(self, proj_id): + self.proj_id = proj_id + + def setVolumeGeometry(self, volume_geometry): + self.volume_geometry = volume_geometry + + def setSinogramGeometry(self, sinogram_geometry): + self.sinogram_geometry = sinogram_geometry + + def process(self): + DATA = self.getInput() + rec_id, IM = astra.create_backprojection(DATA.as_array(), self.proj_id) + astra.data2d.delete(rec_id) + return VolumeData(IM,geometry=self.volume_geometry)
\ No newline at end of file diff --git a/Wrappers/Python/ccpi/astra/astra_utils.py b/Wrappers/Python/ccpi/astra/astra_utils.py new file mode 100644 index 0000000..8b5043a --- /dev/null +++ b/Wrappers/Python/ccpi/astra/astra_utils.py @@ -0,0 +1,61 @@ +import astra + +def convert_geometry_to_astra(volume_geometry, sinogram_geometry): + # Set up ASTRA Volume and projection geometry, not stored + if sinogram_geometry.dimension == '2D': + vol_geom = astra.create_vol_geom(volume_geometry.voxel_num_x, + volume_geometry.voxel_num_y, + volume_geometry.getMinX(), + volume_geometry.getMaxX(), + volume_geometry.getMinY(), + volume_geometry.getMaxY()) + + if sinogram_geometry.geom_type == 'parallel': + proj_geom = astra.create_proj_geom('parallel', + sinogram_geometry.pixel_size_h, + sinogram_geometry.pixel_num_h, + sinogram_geometry.angles) + elif sinogram_geometry.geom_type == 'cone': + proj_geom = astra.create_proj_geom('fanflat', + sinogram_geometry.pixel_size_h, + sinogram_geometry.pixel_num_h, + sinogram_geometry.angles, + sinogram_geometry.dist_source_center, + sinogram_geometry.dist_center_detector) + else: + NotImplemented + + elif sinogram_geometry.dimension == '3D': + vol_geom = astra.create_vol_geom(volume_geometry.voxel_num_x, + volume_geometry.voxel_num_y, + volume_geometry.voxel_num_z, + volume_geometry.getMinX(), + volume_geometry.getMaxX(), + volume_geometry.getMinY(), + volume_geometry.getMaxY(), + volume_geometry.getMinZ(), + volume_geometry.getMaxZ()) + + if sinogram_geometry.proj_geom == 'parallel': + proj_geom = astra.create_proj_geom('parallel3d', + sinogram_geometry.pixel_size_h, + sinogram_geometry.pixel_size_v, + sinogram_geometry.pixel_num_v, + sinogram_geometry.pixel_num_h, + sinogram_geometry.angles) + elif sinogram_geometry.geom_type == 'cone': + proj_geom = astra.create_proj_geom('cone', + sinogram_geometry.pixel_size_h, + sinogram_geometry.pixel_size_v, + sinogram_geometry.pixel_num_v, + sinogram_geometry.pixel_num_h, + sinogram_geometry.angles, + sinogram_geometry.dist_source_center, + sinogram_geometry.dist_center_detector) + else: + NotImplemented + + else: + NotImplemented + + return vol_geom, proj_geom
\ No newline at end of file diff --git a/Wrappers/Python/ccpi/reconstruction/astra_ops.py b/Wrappers/Python/ccpi/reconstruction/astra_ops.py index 452c86a..6af7af7 100644 --- a/Wrappers/Python/ccpi/reconstruction/astra_ops.py +++ b/Wrappers/Python/ccpi/reconstruction/astra_ops.py @@ -16,118 +16,56 @@ # along with this program. If not, see <http://www.gnu.org/licenses/>. from ccpi.reconstruction.ops import Operator -import astra import numpy from ccpi.framework import SinogramData, VolumeData from ccpi.reconstruction.ops import PowerMethodNonsquare +from ccpi.astra.astra_processors import AstraForwardProjector, AstraBackProjector class AstraProjectorSimple(Operator): """ASTRA projector modified to use DataSet and geometry.""" def __init__(self, geomv, geomp, device): super(AstraProjectorSimple, self).__init__() - # Store our volume and sinogram geometries. Redundant with also - # storing in ASTRA format below but needed to assign to - # SinogramData in "direct" method and VolumeData in "adjoint" method + # Store volume and sinogram geometries. self.sinogram_geometry = geomp self.volume_geometry = geomv - # ASTRA Volume geometry - if geomp.dimension == '2D': - self.vol_geom = astra.create_vol_geom(geomv.voxel_num_x, - geomv.voxel_num_y, - geomv.getMinX(), - geomv.getMaxX(), - geomv.getMinY(), - geomv.getMaxY()) - elif geomp.dimension == '3D': - self.vol_geom = astra.create_vol_geom(geomv.voxel_num_x, - geomv.voxel_num_y, - geomv.voxel_num_z, - geomv.getMinX(), - geomv.getMaxX(), - geomv.getMinY(), - geomv.getMaxY(), - geomv.getMinZ(), - geomv.getMaxZ()) - else: - NotImplemented - - - # ASTRA Projections geometry - if geomp.dimension == '2D': - if geomp.geom_type == 'parallel': - self.proj_geom = astra.create_proj_geom('parallel', - geomp.pixel_size_h, - geomp.pixel_num_h, - geomp.angles) - elif geomp.geom_type == 'cone': - self.proj_geom = astra.create_proj_geom('fanflat', - geomp.pixel_size_h, - geomp.pixel_num_h, - geomp.angles, - geomp.dist_source_center, - geomp.dist_center_detector) - else: - NotImplemented - elif geomp.dimension == '3D': - if geomp.proj_geom == 'parallel': - self.proj_geom = astra.create_proj_geom('parallel3d', - geomp.pixel_size_h, - geomp.pixel_size_v, - geomp.pixel_num_v, - geomp.pixel_num_h, - geomp.angles) - elif geomp.geom_type == 'cone': - self.proj_geom = astra.create_proj_geom('cone', - geomp.pixel_size_h, - geomp.pixel_size_v, - geomp.pixel_num_v, - geomp.pixel_num_h, - geomp.angles, - geomp.dist_source_center, - geomp.dist_center_detector) - else: - NotImplemented - else: - NotImplemented - - # ASTRA projector - if device == 'cpu': - # Note that 'line' is only for parallel (2D) and only one option - self.proj_id = astra.create_projector('line', self.proj_geom, - self.vol_geom) # for CPU - elif device == 'gpu': - self.proj_id = astra.create_projector('cuda', self.proj_geom, - self.vol_geom) # for GPU - else: - NotImplemented + self.fp = AstraForwardProjector(volume_geometry=geomv, + sinogram_geometry=geomp, + proj_id=None, + device=device) + self.bp = AstraBackProjector(volume_geometry=geomv, + sinogram_geometry=geomp, + proj_id=None, + device=device) + + # Initialise empty for singular value. self.s1 = None def direct(self, IM): - - sinogram_id, DATA = astra.create_sino(IM.as_array(), self.proj_id) - astra.data2d.delete(sinogram_id) - return SinogramData(DATA,geometry=self.sinogram_geometry) + self.fp.setInput(IM) + out = self.fp.getOutput() + return out def adjoint(self, DATA): - rec_id, IM = astra.create_backprojection(DATA.as_array(), self.proj_id) - astra.data2d.delete(rec_id) - return VolumeData(IM,geometry=self.volume_geometry) + self.bp.setInput(DATA) + out = self.bp.getOutput() + return out - def delete(self): - astra.data2d.delete(self.proj_id) + #def delete(self): + # astra.data2d.delete(self.proj_id) def get_max_sing_val(self): self.s1, sall, svec = PowerMethodNonsquare(self,10) return self.s1 def size(self): - return ( (self.proj_geom['ProjectionAngles'].size, \ - self.proj_geom['DetectorCount']), \ - (self.vol_geom['GridColCount'], \ - self.vol_geom['GridRowCount']) ) + # Only implemented for 2D + return ( (self.sinogram_geometry.angles.size, \ + self.sinogram_geometry.pixel_num_h), \ + (self.volume_geometry.voxel_num_x, \ + self.volume_geometry.voxel_num_y) ) class AstraProjector(Operator): |