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| Not all transforms are automatically available due to the transform factory mechanism in ITK. To register a non-default transform, you can use the procedure below. For example, if you want to read this file:
| | {{warning|1=The media wiki content on this page is no longer maintained. The examples presented on the https://itk.org/Wiki/* pages likely require ITK version 4.13 or earlier releases. In many cases, the examples on this page no longer conform to the best practices for modern ITK versions. |
| | | }} |
| <source lang="text">
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| #Insight Transform File V1.0
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| #Transform 0
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| Transform: MatrixOffsetTransformBase_double_3_3
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| Parameters: 0.991654 0.00303429 0.0015616 -0.000274293 0.970948 0.261678 -0.00143037 -0.263587 0.953079 -0.546243 21.4937 -28.456
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| FixedParameters: -1.11311 -3.55441 16.6988
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| </source>
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| you must register MatrixOffsetTransformBase with the TransformFactory.
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| | |
| ==RegisterTransform.cxx==
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| <source lang="cpp">
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| #include "itkTransformFileReader.h"
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| #include "itkTransformFactoryBase.h"
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| #include "itkTransformFactory.h"
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| #include "itkMatrixOffsetTransformBase.h"
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| | |
| int main(int argc, char *argv[])
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| {
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| std::string fileName;
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| if(argc == 1) // No arguments were provided
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| {
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| fileName = "test.tfm";
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| }
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| else
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| {
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| fileName = argv[1];
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| } | |
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| typedef itk::MatrixOffsetTransformBase< double, 3, 3 > MatrixOffsetTransformType;
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| itk::TransformFactory<MatrixOffsetTransformType>::RegisterTransform();
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| | |
| #if (ITK_VERSION_MAJOR == 4 && ITK_VERSION_MINOR >= 5) || ITK_VERSION_MAJOR > 4
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| itk::TransformFileReaderTemplate<float>::Pointer reader =
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| itk::TransformFileReaderTemplate<float>::New();
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| #else
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| itk::TransformFileReader::Pointer writer = itk::TransformFileReader::New();
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| #endif
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| reader->SetFileName(fileName);
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| reader->Update();
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| std::cout << *(reader->GetTransformList()->begin()) << std::endl;
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| return EXIT_SUCCESS;
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| }
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| </source>
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| {{ITKCMakeLists|{{SUBPAGENAME}}}}
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