ITK  5.3.0
Insight Toolkit
SphinxExamples/src/Core/Common/CropImageBySpecifyingRegion/Code.cxx
/*=========================================================================
*
* 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
*
* 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.
*
*=========================================================================*/
// This is different from CropImageFilter only in the way
// that the region to crop is specified.
#include "itkImage.h"
int
main(int, char *[])
{
using ImageType = itk::Image<unsigned char, 2>;
start.Fill(0);
size.Fill(10);
ImageType::RegionType region(start, size);
ImageType::Pointer image = ImageType::New();
image->SetRegions(region);
image->Allocate();
image->FillBuffer(5);
std::cout << "Image largest region: " << image->GetLargestPossibleRegion() << std::endl;
ImageType::IndexType desiredStart;
desiredStart.Fill(3);
ImageType::SizeType desiredSize;
desiredSize.Fill(4);
ImageType::RegionType desiredRegion(desiredStart, desiredSize);
std::cout << "desiredRegion: " << desiredRegion << std::endl;
FilterType::Pointer filter = FilterType::New();
filter->SetExtractionRegion(desiredRegion);
filter->SetInput(image);
#if ITK_VERSION_MAJOR >= 4
filter->SetDirectionCollapseToIdentity(); // This is required.
#endif
filter->Update();
ImageType::Pointer output = filter->GetOutput();
output->DisconnectPipeline();
output->FillBuffer(2);
index.Fill(5);
std::cout << "new largest region: " << output->GetLargestPossibleRegion() << std::endl;
std::cout << "new: " << (int)output->GetPixel(index) << std::endl;
std::cout << "Original: " << (int)image->GetPixel(index) << std::endl;
return EXIT_SUCCESS;
}
itkExtractImageFilter.h
itk::Index
Represent a n-dimensional index in a n-dimensional image.
Definition: itkIndex.h:67
itk::GTest::TypedefsAndConstructors::Dimension2::SizeType
ImageBaseType::SizeType SizeType
Definition: itkGTestTypedefsAndConstructors.h:49
itkImage.h
itk::Index::Fill
void Fill(IndexValueType value)
Definition: itkIndex.h:271
itk::Size::Fill
void Fill(SizeValueType value)
Definition: itkSize.h:211
itk::GTest::TypedefsAndConstructors::Dimension2::IndexType
ImageBaseType::IndexType IndexType
Definition: itkGTestTypedefsAndConstructors.h:50
itk::GTest::TypedefsAndConstructors::Dimension2::RegionType
ImageBaseType::RegionType RegionType
Definition: itkGTestTypedefsAndConstructors.h:54
itk::ExtractImageFilter
Decrease the image size by cropping the image to the selected region bounds.
Definition: itkExtractImageFilter.h:118
itk::Image
Templated n-dimensional image class.
Definition: itkImage.h:88