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# ========================================================================
# Copyright 2019 Science Technology Facilities Council
# Copyright 2019 University of Manchester
#
# This work is part of the Core Imaging Library developed by Science Technology
# Facilities Council and University of Manchester
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0.txt
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# =========================================================================
from cil.optimisation.operators import LinearOperator
from src.processors import UfoStackedForwardProjector, UfoStackedBackProjector
class UfoStackedProjector(LinearOperator):
"""UFO projector modified to use DataSet and geometry."""
def __init__(self, geomv, geomp, precision_mode='single', stack_num=2):
super(UfoStackedProjector, self).__init__(domain_geometry=geomv, range_geometry=geomp)
self.sinogram_geometry = geomp
self.volume_geometry = geomv
self.fp = UfoStackedForwardProjector(volume_geometry=geomv, sinogram_geometry=geomp,
precision_mode=precision_mode, stack_num=stack_num)
self.bp = UfoStackedBackProjector(volume_geometry=geomv, sinogram_geometry=geomp,
precision_mode=precision_mode, stack_num=stack_num)
def direct(self, IM, out=None):
self.fp.set_input(IM)
if out is None:
return self.fp.get_output()
else:
out.fill(self.fp.get_output())
def adjoint(self, DATA, out=None):
self.bp.set_input(DATA)
if out is None:
return self.bp.get_output()
else:
out.fill(self.bp.get_output())
def domain_geometry(self):
return self.volume_geometry
def range_geometry(self):
return self.sinogram_geometry
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