# \#itk

**URL:** https://discourse.itk.org/tag/itk/192.md

[Latest](https://discourse.itk.org/latest.md) · [Categories](https://discourse.itk.org/categories.md) · [Tags](https://discourse.itk.org/tags.md)

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## [Proposal: Hard-fork vnl inside ITK and end upstream-vxl tracking](https://discourse.itk.org/t/proposal-hard-fork-vnl-inside-itk-and-end-upstream-vxl-tracking/7761)

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**Author:** [@hjmjohnson](https://discourse.itk.org/u/hjmjohnson)\
**Replies:** 2\
**Last updated:** [May 10, 2026, 10:36pm UTC](https://discourse.itk.org/t/proposal-hard-fork-vnl-inside-itk-and-end-upstream-vxl-tracking/7761 "2026-05-10T22:36:48Z")

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TL;DR ITK’s use of vxl is narrow, concentrated, and already well past the point where co-maintaining a synced copy with vxl/vxl upstream provides reciprocal value. I’m proposing we: Deprecate and then remove ITK\_USE\_…

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## [Proposal: drop ITKAnalyzeObjectMap remote module from ITK](https://discourse.itk.org/t/proposal-drop-itkanalyzeobjectmap-remote-module-from-itk/7757)

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**Author:** [@hjmjohnson](https://discourse.itk.org/u/hjmjohnson)\
**Replies:** 0\
**Last updated:** [May 4, 2026, 8:32pm UTC](https://discourse.itk.org/t/proposal-drop-itkanalyzeobjectmap-remote-module-from-itk/7757 "2026-05-04T20:32:24Z")

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The ITK maintainers are proposing to drop the AnalyzeObjectLabelMap remote module from the ITK source tree. PR #6207 removes the Modules/Remote/AnalyzeObjectLabelMap.remote.cmake declaration so the module will no longe…

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## [Reorganize RemoteModules for reduced maintenance burden](https://discourse.itk.org/t/reorganize-remotemodules-for-reduced-maintenance-burden/7753)

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**Author:** [@hjmjohnson](https://discourse.itk.org/u/hjmjohnson)\
**Replies:** 3\
**Last updated:** [April 16, 2026, 12:51am UTC](https://discourse.itk.org/t/reorganize-remotemodules-for-reduced-maintenance-burden/7753 "2026-04-16T00:51:16Z")

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RFC: Consolidating remote modules into hierarchical category repos Tracking issue: ENH: Consolidate remote modules into hierarchical category repos · Issue #6060 · InsightSoftwareConsortium/ITK · GitHub ITK currently ma…

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## [Moving data from VTK to ITK: issue in memory management](https://discourse.itk.org/t/moving-data-from-vtk-to-itk-issue-in-memory-management/7740)

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**Author:** [@Boris38](https://discourse.itk.org/u/Boris38)\
**Replies:** 4\
**Last updated:** [March 31, 2026, 2:35pm UTC](https://discourse.itk.org/t/moving-data-from-vtk-to-itk-issue-in-memory-management/7740 "2026-03-31T14:35:30Z")

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Hello everyone, I was advised to post this topic here. But the initial issue is here: Moving data from VTK to ITK: issue in memory management - Support - VTK I use ITK (5.4.4) and VTK (9.5.2) in my code. I use some VTK…

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## [Greptile](https://discourse.itk.org/t/greptile/7737)

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**Author:** [@dzenanz](https://discourse.itk.org/u/dzenanz)\
**Replies:** 6\
**Last updated:** [March 26, 2026, 1:38pm UTC](https://discourse.itk.org/t/greptile/7737 "2026-03-26T13:38:26Z")

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I got an email from Greptile: Greptile lets you add custom rules to enforce your organization’s preferences, coding standards and best practices automatically across pull requests. You can configure them in two way…

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## [Current path to adding an ITK remote module](https://discourse.itk.org/t/current-path-to-adding-an-itk-remote-module/7730)

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**Author:** [@mattcieslak](https://discourse.itk.org/u/mattcieslak)\
**Replies:** 5\
**Last updated:** [March 10, 2026, 7:27pm UTC](https://discourse.itk.org/t/current-path-to-adding-an-itk-remote-module/7730 "2026-03-10T19:27:13Z")

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Hi! We’ve been trying to establish a standard file format for tractography/streamlines data ( tee-ar-ex · GitHub ) and as part of that I’ve been working on an ITK remote module that provides I/O and ITK-style interfaces.…

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## [Intermittent SIGSEGV in SignedMaurerDistanceMap](https://discourse.itk.org/t/intermittent-sigsegv-in-signedmaurerdistancemap/7714)

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**Author:** [@e\_s](https://discourse.itk.org/u/e_s)\
**Replies:** 8\
**Last updated:** [February 25, 2026, 5:54pm UTC](https://discourse.itk.org/t/intermittent-sigsegv-in-signedmaurerdistancemap/7714 "2026-02-25T17:54:01Z")

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Hello Everyone. I am experiencing an intermittent Segmentation Fault while using the itk::simple::SignedMaurerDistanceMap() function. Environment SimpleITK 2.4 (ITK 5.4), Ubuntu 24 with intel oneAPI 2025.1 (icpx) comp…

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## [A static variable in itkNiftiImageIO.cxx](https://discourse.itk.org/t/a-static-variable-in-itkniftiimageio-cxx/7698)

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**Author:** [@Liming\_Zhou](https://discourse.itk.org/u/Liming_Zhou)\
**Replies:** 3\
**Last updated:** [February 12, 2026, 11:48am UTC](https://discourse.itk.org/t/a-static-variable-in-itkniftiimageio-cxx/7698 "2026-02-12T11:48:39Z")

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static std::string prev; if (prev != this-\>GetFileName()) { #if defined(ITK\_USE\_VERY\_VERBOSE\_NIFTI\_DEBUGGING) DumpNiftiHeader(this-\>GetFileName()); #endif prev = this-\>GetFileName(); } this “prev” useless maybe, d…

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## [X-ray image file of TIFF format proces](https://discourse.itk.org/t/x-ray-image-file-of-tiff-format-proces/7693)

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**Author:** [@wulicheng](https://discourse.itk.org/u/wulicheng)\
**Replies:** 0\
**Last updated:** [January 6, 2026, 6:08am UTC](https://discourse.itk.org/t/x-ray-image-file-of-tiff-format-proces/7693 "2026-01-06T06:08:25Z")

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I have a large x-ray file of TIFF in the link. I want to process it more clarity. Expecially the link line in the image . I have do something. But it is not enough。 Will you give me some sugesstions. Thinks! This is the…

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## [QVTKNativeWidget: Jagged edges on 2D images](https://discourse.itk.org/t/qvtknativewidget-jagged-edges-on-2d-images/7682)

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**Author:** [@Manjunath\_AV](https://discourse.itk.org/u/Manjunath_AV)\
**Replies:** 1\
**Last updated:** [December 17, 2025, 5:53pm UTC](https://discourse.itk.org/t/qvtknativewidget-jagged-edges-on-2d-images/7682 "2025-12-17T17:53:00Z")

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Hi all, I’m displaying 2D images using QVTKNativeWidget and I’m seeing zigzag/jagged edges along high-contrast boundaries. I’ve attached two screenshots: Current issue: edges look stair-stepped/pixelate image670×2…

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## [ITK/RTK config and build to use CudaBackProjectionImageFilter python wrapper](https://discourse.itk.org/t/itk-rtk-config-and-build-to-use-cudabackprojectionimagefilter-python-wrapper/7658)

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**Author:** [@jshenNT](https://discourse.itk.org/u/jshenNT)\
**Replies:** 9\
**Last updated:** [December 4, 2025, 4:49pm UTC](https://discourse.itk.org/t/itk-rtk-config-and-build-to-use-cudabackprojectionimagefilter-python-wrapper/7658 "2025-12-04T16:49:00Z")

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Hello, I’m new to ITK/RTK and currently working on a project where we want to use RTK’s reconstruction functionality, specifically CudaFDKBackProjectionImageFilter. However, due to my limited experience with ITK/RTK, I…

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## [Error building ITK 5.4 with CMake on MSVC 19.44: unresolved external symbol \_\_std\_find\_first\_of\_trivial\_pos\_1](https://discourse.itk.org/t/error-building-itk-5-4-with-cmake-on-msvc-19-44-unresolved-external-symbol-std-find-first-of-trivial-pos-1/7673)

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**Author:** [@thanhst](https://discourse.itk.org/u/thanhst)\
**Replies:** 7\
**Last updated:** [December 1, 2025, 2:02am UTC](https://discourse.itk.org/t/error-building-itk-5-4-with-cmake-on-msvc-19-44-unresolved-external-symbol-std-find-first-of-trivial-pos-1/7673 "2025-12-01T02:02:21Z")

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Hi ITK team, I built ITK 5.4 using CMake and Visual Studio 2022. Everything compiles and links fine for most headers, but when I include \<itkImageFileReader.h\> in my project, I get the following linker error with file i…

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## [itk specified file not found error](https://discourse.itk.org/t/itk-specified-file-not-found-error/7665)

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**Author:** [@ali123](https://discourse.itk.org/u/ali123)\
**Replies:** 1\
**Last updated:** [November 17, 2025, 7:12pm UTC](https://discourse.itk.org/t/itk-specified-file-not-found-error/7665 "2025-11-17T19:12:21Z")

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hi i,m realy new to c++, vs and itk i install that with vcpkg and integrate install it i add directory lib and include to project property but i still have problem and get this specified file not found can you p…

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## [Some Dicom format issues](https://discourse.itk.org/t/some-dicom-format-issues/7664)

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**Author:** [@Xoz](https://discourse.itk.org/u/Xoz)\
**Replies:** 3\
**Last updated:** [November 15, 2025, 8:34pm UTC](https://discourse.itk.org/t/some-dicom-format-issues/7664 "2025-11-15T20:34:06Z")

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Hi everyone, I’ve been working with new @itk-wasm/image-io and @itk-wasm/dicom for a while and met some issues with the file format, some of them may be not in plan to be supported, so I would like to know your opinion …

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## [The application crashes while generating the NRRD file](https://discourse.itk.org/t/the-application-crashes-while-generating-the-nrrd-file/7646)

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**Author:** [@purushothaman\_u](https://discourse.itk.org/u/purushothaman_u)\
**Replies:** 6\
**Last updated:** [October 17, 2025, 1:32pm UTC](https://discourse.itk.org/t/the-application-crashes-while-generating-the-nrrd-file/7646 "2025-10-17T13:32:19Z")

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In ticket the below ITK ticket an issue has been reported, I have same DICOM files where Bits allocated is 12 for which an exception is supposed to be raised as mentioned in the ticket’s fix is not working instead my …

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## [Inappropriate output for rotating a volume using Euler transform in C++](https://discourse.itk.org/t/inappropriate-output-for-rotating-a-volume-using-euler-transform-in-c/7644)

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**Author:** [@purushothaman\_u](https://discourse.itk.org/u/purushothaman_u)\
**Replies:** 5\
**Last updated:** [October 11, 2025, 9:51am UTC](https://discourse.itk.org/t/inappropriate-output-for-rotating-a-volume-using-euler-transform-in-c/7644 "2025-10-11T09:51:28Z")

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The below code takes the axial volume as input, applies a 90-degree rotation around the z-axis, and writes the output volume to a 90.nrrd file. In 90. When viewing the NRRD file in the ITK-SNAP app, we can see that certa…

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## [Build Error: LNK1169 when building ITK with RTK Python wrappers on Windows](https://discourse.itk.org/t/build-error-lnk1169-when-building-itk-with-rtk-python-wrappers-on-windows/7635)

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**Author:** [@gaoweilin](https://discourse.itk.org/u/gaoweilin)\
**Replies:** 9\
**Last updated:** [September 21, 2025, 8:04pm UTC](https://discourse.itk.org/t/build-error-lnk1169-when-building-itk-with-rtk-python-wrappers-on-windows/7635 "2025-09-21T20:04:03Z")

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I am encountering a linker error (LNK1169) while trying to build the ITK Python wrappers for the Reconstruction Toolkit (RTK). The build fails to generate the itk\_RTKPython.pyd file. I have tried several common troublesh…

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## [volume regularization using ITK](https://discourse.itk.org/t/volume-regularization-using-itk/7594)

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**Author:** [@Eva\_Monclus\_Lahoya](https://discourse.itk.org/u/Eva_Monclus_Lahoya)\
**Replies:** 4\
**Last updated:** [September 19, 2025, 8:29pm UTC](https://discourse.itk.org/t/volume-regularization-using-itk/7594 "2025-09-19T20:29:29Z")

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Hello, I’m working on a Python application that uses ITK, and I’m looking for guidance on how to regularize or resample a 3D volume when the slice spacing is not uniform—i.e., the distance between slices varies througho…

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## [If I want to use rtkLagCorrectionImageFilterfor correction, are there any materials I can refer to?](https://discourse.itk.org/t/if-i-want-to-use-rtklagcorrectionimagefilterfor-correction-are-there-any-materials-i-can-refer-to/7630)

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**Author:** [@ma1282029525](https://discourse.itk.org/u/ma1282029525)\
**Replies:** 4\
**Last updated:** [September 15, 2025, 3:37pm UTC](https://discourse.itk.org/t/if-i-want-to-use-rtklagcorrectionimagefilterfor-correction-are-there-any-materials-i-can-refer-to/7630 "2025-09-15T15:37:23Z")

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If I want to use rtkLagCorrectionImageFilter for correction, are there any materials I can refer to?How can I obtain the parameters for: -a, --rates=FLOAT Lag rates (a0, a1, a2, a3) -c, --coefficients=FLOAT Lag coeffic…

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## [Is there a complete example to use itk::CartesianToPolarTransform to transform an image?](https://discourse.itk.org/t/is-there-a-complete-example-to-use-itk-cartesiantopolartransform-to-transform-an-image/7623)

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**Author:** [@ma1282029525](https://discourse.itk.org/u/ma1282029525)\
**Replies:** 5\
**Last updated:** [September 1, 2025, 7:09am UTC](https://discourse.itk.org/t/is-there-a-complete-example-to-use-itk-cartesiantopolartransform-to-transform-an-image/7623 "2025-09-01T07:09:39Z")

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I want to complete the task of removing ring artifacts. I also came across the FourierStripeArtifactImageFilter class, but I failed at the previous step—I am unable to convert the Cartesian coordinate system image to a p…

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## [RTK 2.7 + CUDA 12.3 Compiled with CUDA Enabled but Using CPU Filter (FDKConeBeamReconstructionFilterinstead of CudaFDKConeBeamReconstructionFilter)](https://discourse.itk.org/t/rtk-2-7-cuda-12-3-compiled-with-cuda-enabled-but-using-cpu-filter-fdkconebeamreconstructionfilterinstead-of-cudafdkconebeamreconstructionfilter/7617)

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**Author:** [@ma1282029525](https://discourse.itk.org/u/ma1282029525)\
**Replies:** 3\
**Last updated:** [August 24, 2025, 1:14am UTC](https://discourse.itk.org/t/rtk-2-7-cuda-12-3-compiled-with-cuda-enabled-but-using-cpu-filter-fdkconebeamreconstructionfilterinstead-of-cudafdkconebeamreconstructionfilter/7617 "2025-08-24T01:14:32Z")

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I compiled ITK 5.4.3 and RTK 2.7.0 with CUDA 12.3 support (NVIDIA driver updated). Build confirmation: • RTK\_USE\_CUDA=ONin CMake • RTK\_USE\_CUDAmacro defined in code • No errors during compilation, RTKCudalibrari…

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## [Writing a bunch of 3D Images (Nifti Format) into one whole 4D Image.](https://discourse.itk.org/t/writing-a-bunch-of-3d-images-nifti-format-into-one-whole-4d-image/7558)

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**Author:** [@Seun](https://discourse.itk.org/u/Seun)\
**Replies:** 10\
**Last updated:** [June 5, 2025, 9:01pm UTC](https://discourse.itk.org/t/writing-a-bunch-of-3d-images-nifti-format-into-one-whole-4d-image/7558 "2025-06-05T21:01:03Z")

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Hello everyone, I was wondering if anyone could help point me in the right direction. I have a bunch of itk::Image\<type, 3\> 3D images that I would like to combine into a single 4D file written out using itk::NiftiIma…

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## [Jacobian coordinate system in itkDisplacementFieldTransform vs itkDisplacementFieldJacobianDeterminantFilter](https://discourse.itk.org/t/jacobian-coordinate-system-in-itkdisplacementfieldtransform-vs-itkdisplacementfieldjacobiandeterminantfilter/7522)

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**Author:** [@cookpa](https://discourse.itk.org/u/cookpa)\
**Replies:** 3\
**Last updated:** [May 21, 2025, 6:56pm UTC](https://discourse.itk.org/t/jacobian-coordinate-system-in-itkdisplacementfieldtransform-vs-itkdisplacementfieldjacobiandeterminantfilter/7522 "2025-05-21T18:56:30Z")

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I’ve been working on fixing problems in ANTs tensor / vector coordinates lately, which has led me to look at the local Jacobian calculations. I am trying to better understand how the coordinate system of Jacobians work i…

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## [Get Jacobian wrt to Position for BSplineTransform](https://discourse.itk.org/t/get-jacobian-wrt-to-position-for-bsplinetransform/7504)

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**Author:** [@reox](https://discourse.itk.org/u/reox)\
**Replies:** 7\
**Last updated:** [May 10, 2025, 12:53am UTC](https://discourse.itk.org/t/get-jacobian-wrt-to-position-for-bsplinetransform/7504 "2025-05-10T00:53:08Z")

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As far as I can tell, the function ComputeJacobianWithRespectToPosition is not implemented for BSplineTransform (as it is for DisplacementFieldTransform) but only ComputeJacobianWithRespectToParameters, for example using…

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## [Reading in vector volume from NRRD with variable scalar component count](https://discourse.itk.org/t/reading-in-vector-volume-from-nrrd-with-variable-scalar-component-count/7485)

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**Author:** [@cpinter](https://discourse.itk.org/u/cpinter)\
**Replies:** 12\
**Last updated:** [April 24, 2025, 12:45pm UTC](https://discourse.itk.org/t/reading-in-vector-volume-from-nrrd-with-variable-scalar-component-count/7485 "2025-04-24T12:45:35Z")

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Hi all, I’d like to read an NRRD volume that looks like this: type: int dimension: 4 space: right-anterior-superior sizes: 26 102 102 61 kinds: list domain domain domain I have this code that is supposed to do the re…

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## [ImageRegistrationMethodv4 crashes Unexpectedly](https://discourse.itk.org/t/imageregistrationmethodv4-crashes-unexpectedly/5268)

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**Author:** [@autobuyer](https://discourse.itk.org/u/autobuyer)\
**Replies:** 1\
**Last updated:** [March 12, 2025, 4:12pm UTC](https://discourse.itk.org/t/imageregistrationmethodv4-crashes-unexpectedly/5268 "2025-03-12T16:12:01Z")

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Hello, I am relatively new ITK user and I am trying to implement affine registration in C++. After going through examples, I was able to put together a reasonable solution. However, when I run it it crashes unexpectedly…

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## [ITK License Compatibility Concern with VNL](https://discourse.itk.org/t/itk-license-compatibility-concern-with-vnl/7452)

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**Author:** [@bauer-tom](https://discourse.itk.org/u/bauer-tom)\
**Replies:** 3\
**Last updated:** [March 10, 2025, 11:23am UTC](https://discourse.itk.org/t/itk-license-compatibility-concern-with-vnl/7452 "2025-03-10T11:23:57Z")

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Hello, I have noticed a potential licensing conflict in ITK related to third-party code from VNL. While ITK is distributed under the permissive Apache 2.0 license, which allows commercial use, I found that the VNL modul…

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## [Unable to Read MHD Files with metaReadImage](https://discourse.itk.org/t/unable-to-read-mhd-files-with-metareadimage/7447)

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**Author:** [@GMrrc](https://discourse.itk.org/u/GMrrc)\
**Replies:** 2\
**Last updated:** [February 28, 2025, 9:34pm UTC](https://discourse.itk.org/t/unable-to-read-mhd-files-with-metareadimage/7447 "2025-02-28T21:34:14Z")

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Hello I’m encountering issues when trying to read MHD files using the metaReadImage method from ITK-Wasm. I’ve tried multiple approaches, but I cannot successfully load an MHD/ZRAW file. Additionally, the official onlin…

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## [parameter tuning](https://discourse.itk.org/t/parameter-tuning/7442)

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**Author:** [@zhangxiang](https://discourse.itk.org/u/zhangxiang)\
**Replies:** 3\
**Last updated:** [February 21, 2025, 12:45am UTC](https://discourse.itk.org/t/parameter-tuning/7442 "2025-02-21T00:45:04Z")

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How can I choose the appropriate parameters of filters, such as Hann hannY multiplier radius. When I run rtkfdk.exe with these parameter input, my CPU go to 100％, I have to close cuda acceleration. subs…

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## [About calculating FA(Fractional Anisotropy) with TensorRelativeAnisotropyImageFilter](https://discourse.itk.org/t/about-calculating-fa-fractional-anisotropy-with-tensorrelativeanisotropyimagefilter/7437)

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**Author:** [@Pinyu\_Huang](https://discourse.itk.org/u/Pinyu_Huang)\
**Replies:** 0\
**Last updated:** [February 18, 2025, 8:07am UTC](https://discourse.itk.org/t/about-calculating-fa-fractional-anisotropy-with-tensorrelativeanisotropyimagefilter/7437 "2025-02-18T08:07:08Z")

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Hi there, I tried to calculate FA and PDD for streamlines tractography with TensorRelativeAnisotropyImageFilter. And I basically follow the workflow in the website (ITK: Examples/Filtering/DiffusionTensor3DReconstructio…

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