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# ==========================================================================
#
# Copyright NumFOCUS
#
# 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
#
# https://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 numpy as np
import itk
if len(sys.argv) < 2:
print("Usage: " + sys.argv[0] + " <inputImage>")
sys.exit(1)
inputImageFileName = sys.argv[1]
image = itk.imread(inputImageFileName)
array = itk.array_from_image(image)
extractor = itk.ExtractImageFilter.New(image)
extractionRegion = image.GetLargestPossibleRegion()
extractor.SetExtractionRegion(extractionRegion)
# GetArrayFromImage calls UpdateLargestPossibleRegion to ensure the image buffer
# has been populated
array = itk.array_from_image(extractor.GetOutput())
# GetArrayFromImage calls UpdateLargestPossibleRegion to ensure the image buffer
# has been populated with the correct region
extractionRegion.SetSize(10)
extractor.SetExtractionRegion(extractionRegion)
array = itk.array_from_image(extractor.GetOutput())
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