DOC: Remove FEM registration content retired to the ITKFEM remote module#237
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thewtex merged 3 commits intoJul 6, 2026
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The ITKFEM and ITKFEMRegistration modules were retired from the ITK main tree to the InsightSoftwareConsortium/ITKFEM remote module (ITK PR #6524, phase 1 of #6511). Remove the corresponding Software Guide content: - Remove the FEM-Based Image Registration subsection; it built from the deleted DeformableRegistration1 example and the FEM parameter file, both removed in #6524. - Drop the FEM Framework architecture item, the FEM registration-type mention, and the finite-element package sentence from SystemOverview. - Installation: FEM is no longer a built-in non-default module; use Module_ITKReview for that example. - Remove FEM from the SpatialObject-type and Numerics-module lists.
The namespace coding-style example used itk::fem, which is retired to the ITKFEM remote module. Use itk::Statistics, a durable in-tree sub-namespace, so the example stays valid.
The DeformableRegistration1 figures (CheckerboardBefore, CheckerboardAfter, and Output) were only referenced by the FEM-Based Image Registration subsection removed in the prior commit. Drop the now-unused art.
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Removes the Software Guide's coverage of the FEM (finite-element) deformable registration, which has been retired from ITK to the external ITKFEM remote module and no longer exists on ITK
main. The guide'sDeformableRegistration1(FEM) reference was breaking builds against current ITKmain; this makes the guide build cleanly againstmainagain.What's removed
DeformableRegistration1) fromDesignAndFunctionality/DeformableRegistration.tex.FiniteElementRegistrationParameters1.txt.DeformableRegistration1figures (checkerboard before/after and output).itk::Statisticsexample.The non-FEM deformable examples (
DeformableRegistration4through7: BSpline / Level-Set / Demons) are retained.Validation
Built locally against current ITK
main(-DITK_GIT_TAG=main): bothITKSoftwareGuide-Book1.pdfand-Book2.pdfproduced with no fatal errors.git grepconfirms no meaningful FEM references remain in the LaTeX sources.