SphinxExamples/src/Core/Common/StreamAPipeline/Code.py

#!/usr/bin/env python

#==========================================================================
#
#   Copyright Insight Software Consortium
#
#   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.
#
#==========================================================================*/

import sys
import itk

from distutils.version import StrictVersion as VS
if VS(itk.Version.GetITKVersion()) < VS("4.10.0"):
    print("ITK 4.10.0 is required.")
    sys.exit(1)

if len(sys.argv) != 2:
    print('Usage: ' + sys.argv[0] + ' <NumberOfSplits>')
    sys.exit(1)
numberOfSplits = int(sys.argv[1])

Dimension = 2
PixelType = itk.UC
ImageType = itk.Image[PixelType, Dimension]

source = itk.RandomImageSource[ImageType].New()
size = itk.Size[Dimension]()
size.Fill(numberOfSplits)
source.SetSize(size)

monitorFilter = itk.PipelineMonitorImageFilter[ImageType].New()
monitorFilter.SetInput(source.GetOutput())

streamingFilter = itk.StreamingImageFilter[ImageType, ImageType].New()
streamingFilter.SetInput(monitorFilter.GetOutput())
streamingFilter.SetNumberOfStreamDivisions(numberOfSplits)

streamingFilter.Update()

print('The output LargestPossibleRegion is: ' +
        str(streamingFilter.GetOutput().GetLargestPossibleRegion()))

print('')

updatedRequestedRegions = monitorFilter.GetUpdatedRequestedRegions()
print("Updated RequestedRegion's:")
for ii in range(len(updatedRequestedRegions)):
    print('  ' + str(updatedRequestedRegions[ii]))