SphinxExamples/src/Filtering/ImageFusion/OverlayLabelMapOnTopOfAnImage/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

if len(sys.argv) != 4:
    print("Usage: " + sys.argv[0] +
          " <InputFileName> <LabelMap> <OutputFileName>")
    sys.exit(1)

inputFileName = sys.argv[1]
labelFileName = sys.argv[2]
outputFileName = sys.argv[3]

PixelType = itk.ctype('unsigned char')
Dimension = 2

ImageType = itk.Image[PixelType, Dimension]


reader = itk.ImageFileReader[ImageType].New()
reader.SetFileName(inputFileName)

labelReader = itk.ImageFileReader[ImageType].New()
labelReader.SetFileName(labelFileName)


LabelType = itk.ctype('unsigned long')
LabelObjectType = itk.StatisticsLabelObject[LabelType, Dimension]
LabelMapType = itk.LabelMap[LabelObjectType]

converter = itk.LabelImageToLabelMapFilter[ImageType, LabelMapType].New()
converter.SetInput(labelReader)

RGBImageType = itk.Image[itk.RGBPixel[PixelType], Dimension]
overlayFilter = itk.LabelMapOverlayImageFilter[LabelMapType, ImageType, RGBImageType].New()
overlayFilter.SetInput(converter.GetOutput())
overlayFilter.SetFeatureImage(reader.GetOutput())
overlayFilter.SetOpacity(0.5)


itk.imwrite(overlayFilter.GetOutput(), outputFileName)