ResampleImageFilter.py

#==========================================================================
#
#   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.
#
#==========================================================================*/


#     INPUTS: {BrainProtonDensitySlice.png}
#     OUTPUTS: {ResampleImageFilterOutput1.png}
#     0

#     INPUTS: {BrainProtonDensitySlice.png}
#     OUTPUTS: {ResampleImageFilterOutput2.png}
#     1

#     INPUTS: {BrainProtonDensitySlice.png}
#     OUTPUTS: {ResampleImageFilterOutput3.png}
#     2

#     INPUTS: {BrainProtonDensitySlice.png}
#     OUTPUTS: {ResampleImageFilterOutput4.png}
#     3

from __future__ import print_function

import itk
from sys import argv, stderr, exit
itk.auto_progress(2)


if(len(argv) < 3):
    print((
        "Missing Parameters \n Usage: ResampleImageFilter.py inputImageFile "
        "outputImageFile [exampleAction={0,1,2,3}]"), file=stderr)
    exit(1)

exampleAction = 0

if(len(argv) >= 4):
    exampleAction = int(argv[3])

Dimension = 2
InputPixelType = itk.UC
OutputPixelType = itk.UC
InputImageType = itk.Image[InputPixelType, Dimension]
OutputImageType = itk.Image[OutputPixelType, Dimension]

ReaderType = itk.ImageFileReader[InputImageType]
CastType = itk.CastImageFilter[InputImageType, OutputImageType]
WriterType = itk.ImageFileWriter[OutputImageType]

reader = ReaderType.New()
cast = CastType.New()
writer = WriterType.New()

reader.SetFileName(argv[1])
writer.SetFileName(argv[2])

FilterType = itk.ResampleImageFilter[InputImageType, InputImageType]
filter = FilterType.New()

TransformType = itk.AffineTransform[itk.D, Dimension]

transform = TransformType.New()
filter.SetTransform(transform)

InterpolatorType = itk.NearestNeighborInterpolateImageFunction[
    InputImageType, itk.D]

interpolator = InterpolatorType.New()
filter.SetInterpolator(interpolator)

filter.SetDefaultPixelValue(0)

# spacing = itk.Vector[itk.D, Dimension]()
# spacing.SetElement(0, 1.0)
# spacing.SetElement(1, 1.0)
# filter.SetOutputSpacing( spacing )
filter.SetOutputSpacing(1.0)

# origin = itk.Point[itk.D, Dimension]()
# origin.SetElement(0, 0.0)
# origin.SetElement(1, 0.0)
# filter.SetOutputOrigin( origin )
filter.SetOutputOrigin([0.0, 0.0])

# size = itk.Size[Dimension]()
# size.SetElement(0, 300)
# size.SetElement(1, 300)
# filter.SetSize( size )
filter.SetSize(300)

filter.SetInput(reader.GetOutput())
cast.SetInput(filter.GetOutput())
writer.SetInput(cast.GetOutput())
writer.Update()

# translation = itk.Vector[itk.D, Dimension]()
# translation.SetElement(0, -30)
# translation.SetElement(1, -50)
# transform.Translate( translation, 0 )
transform.Translate([-30, -50], False)

if(exampleAction == 1):
    writer.Update()


filter.SetDefaultPixelValue(100)

if(exampleAction == 2):
    writer.Update()