# Latest

**URL:** https://discourse.itk.org/latest.md?page=92

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

**Page:** 93

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## [Gerrit Code Review read-only archive](https://discourse.itk.org/t/gerrit-code-review-read-only-archive/1469)

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**Author:** [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\
**Replies:** 3\
**Last updated:** [January 14, 2019, 2:01am UTC](https://discourse.itk.org/t/gerrit-code-review-read-only-archive/1469 "2019-01-14T02:01:55Z")

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Hi folks, Since we now use GitHub for code reviews :metal:, we are archiving the old http://review.source.kitware.com Gerrit Code Review instance. On Saturday, December 15th, the instance will be transitioned to a read-…

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## [How to use SymmetricEigenAnalysisImageFilter to generate eigen vector image?](https://discourse.itk.org/t/how-to-use-symmetriceigenanalysisimagefilter-to-generate-eigen-vector-image/1521)

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**Author:** [@TaoH](https://discourse.itk.org/u/TaoH)\
**Replies:** 2\
**Last updated:** [January 12, 2019, 6:28pm UTC](https://discourse.itk.org/t/how-to-use-symmetriceigenanalysisimagefilter-to-generate-eigen-vector-image/1521 "2019-01-12T18:28:41Z")

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I try to compute eigen vectors of the symmetric matrix corresponding to every input pixel. So, I try to add m\_Calculator.ComputeEigenValuesAndVectors(x, eigenValues,eigenvectors) in itkSymmetricEigenAnalysisImageFilter.h.…

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## [SimpleITK 1.2.0 Release](https://discourse.itk.org/t/simpleitk-1-2-0-release/1518)

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**Author:** [@blowekamp](https://discourse.itk.org/u/blowekamp)\
**Replies:** 0\
**Last updated:** [January 11, 2019, 4:53pm UTC](https://discourse.itk.org/t/simpleitk-1-2-0-release/1518 "2019-01-11T16:53:06Z")

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Announcement We are pleased to announce the SimpleITK 1.2 Release! Installing SimpleITK Complete instructions on getting started with SimpleITK including downloading binaries or building SimpleITK can be found on the Si…

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## [A different directory for GTest cxx files?](https://discourse.itk.org/t/a-different-directory-for-gtest-cxx-files/1514)

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**Author:** [@Niels\_Dekker](https://discourse.itk.org/u/Niels_Dekker)\
**Replies:** 2\
**Last updated:** [January 10, 2019, 7:30pm UTC](https://discourse.itk.org/t/a-different-directory-for-gtest-cxx-files/1514 "2019-01-10T19:30:04Z")

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Regarding: @dzenanz suggested me to discuss this issue here at the forum, as it is more like a question: ITK\\Modules\\Core\\Common\\test now has more than 200 source files. While I think it’s great to have such a large…

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## [\[SOLVED\] GDCMIO without image data element](https://discourse.itk.org/t/solved-gdcmio-without-image-data-element/1512)

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**Author:** [@Gordian](https://discourse.itk.org/u/Gordian)\
**Replies:** 5\
**Last updated:** [January 10, 2019, 1:56pm UTC](https://discourse.itk.org/t/solved-gdcmio-without-image-data-element/1512 "2019-01-10T13:56:34Z")

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Hello just a short question for reassurance: Does the gdcmIO can write a dicom without an actual image (e.g. for an RTStruct)? The documentation states: “ImageIO class for reading and writing DICOM V3.0 and ACR/NEMA 1&…

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## [Python's Numpy bridge - GetImageFromArray - Freed buffer pointer after Graft](https://discourse.itk.org/t/pythons-numpy-bridge-getimagefromarray-freed-buffer-pointer-after-graft/1506)

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**Author:** [@simon.rit](https://discourse.itk.org/u/simon.rit)\
**Replies:** 5\
**Last updated:** [January 9, 2019, 10:56pm UTC](https://discourse.itk.org/t/pythons-numpy-bridge-getimagefromarray-freed-buffer-pointer-after-graft/1506 "2019-01-09T22:56:27Z")

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I have been struggling with a bug (in my opinion) of GetImageFromArray in the Numpy bridge. In RTK, I need to graft an Image to a CudaImage when I want to use a Cuda filter using non-Cuda images. See, e.g., this example.…

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## [Pipe Fixed/Moving Image/Transform to ImageToImageMetricV4 vs ImageRegistrationMethodV4](https://discourse.itk.org/t/pipe-fixed-moving-image-transform-to-imagetoimagemetricv4-vs-imageregistrationmethodv4/1511)

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**Author:** [@Roulbac](https://discourse.itk.org/u/Roulbac)\
**Replies:** 0\
**Last updated:** [January 9, 2019, 6:08pm UTC](https://discourse.itk.org/t/pipe-fixed-moving-image-transform-to-imagetoimagemetricv4-vs-imageregistrationmethodv4/1511 "2019-01-09T18:08:09Z")

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Hi all, I’m working on a registration problem and I am confused how both ImageToImageMetricV4 and ImageRegistrationMethodV4 offer a Set\[Initial\]Fixed(Moving)Image(Transform) function. In a typical registration pipeline…

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## [\[SOLVED\]TransformIndexToPhysicalPoint manually](https://discourse.itk.org/t/solved-transformindextophysicalpoint-manually/1031)

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**Author:** [@rolof](https://discourse.itk.org/u/rolof)\
**Replies:** 9\
**Last updated:** [January 9, 2019, 5:59pm UTC](https://discourse.itk.org/t/solved-transformindextophysicalpoint-manually/1031 "2019-01-09T17:59:03Z")

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Hi all, I have a question How could I do the things that TransformIndexToPhysicalPoint does but manually? I know that here (https://itk.org/Doxygen/html/Examples\_2DataRepresentation\_2Image\_2Image4\_8cxx-example.html) I …

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## [Error during registration](https://discourse.itk.org/t/error-during-registration/1510)

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**Author:** [@ChanghongLi](https://discourse.itk.org/u/ChanghongLi)\
**Replies:** 2\
**Last updated:** [January 9, 2019, 2:38pm UTC](https://discourse.itk.org/t/error-during-registration/1510 "2019-01-09T14:38:32Z")

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Dear experts, Now I am using ANTS toolbox, which is based on the ITK, to registe my images to the template but i found the following error: \*\*\*\*=============================================================== \*\*\*\* WARN…

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## [FastMarchingImageFilter for multiple-labels?](https://discourse.itk.org/t/fastmarchingimagefilter-for-multiple-labels/1446)

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**Author:** [@yannick\_s](https://discourse.itk.org/u/yannick_s)\
**Replies:** 2\
**Last updated:** [January 9, 2019, 11:57am UTC](https://discourse.itk.org/t/fastmarchingimagefilter-for-multiple-labels/1446 "2019-01-09T11:57:32Z")

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Dear all, I would like to refine/vary a given multi-label segmentation with the multi-label fast marching algorithm. For a single label, I was able to use the FastMarchingImageFilter in python ITK. Is it possible to us…

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## [Issues in github](https://discourse.itk.org/t/issues-in-github/1218)

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**Author:** [@phcerdan](https://discourse.itk.org/u/phcerdan)\
**Replies:** 15\
**Last updated:** [January 9, 2019, 2:06am UTC](https://discourse.itk.org/t/issues-in-github/1218 "2019-01-09T02:06:51Z")

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What is the status on allowing opening issues in the github mirror https://github.com/InsightSoftwareConsortium/ITK? I have some really minor warnings I find building tests, and an issue in github would be better than r…

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## [SimpleITK course at SPIE Medical Imaging 2019](https://discourse.itk.org/t/simpleitk-course-at-spie-medical-imaging-2019/1495)

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**Author:** [@zivy](https://discourse.itk.org/u/zivy)\
**Replies:** 2\
**Last updated:** [January 8, 2019, 6:31pm UTC](https://discourse.itk.org/t/simpleitk-course-at-spie-medical-imaging-2019/1495 "2019-01-08T18:31:32Z")

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Join us at the SPIE Medical Imaging Conference in San Diego CA, February 17 2019, for a hands on course, SimpleITK Jupyter Notebooks: Biomedical Image Analysis in Python. This intermediate level course will start with …

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## [ITK to Unreal Engine](https://discourse.itk.org/t/itk-to-unreal-engine/1501)

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**Author:** [@Amir\_y](https://discourse.itk.org/u/Amir_y)\
**Replies:** 2\
**Last updated:** [January 4, 2019, 4:13pm UTC](https://discourse.itk.org/t/itk-to-unreal-engine/1501 "2019-01-04T16:13:47Z")

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Hello, I am trying to read DICOM series and create a 3d volume which will be used inside Unreal Engine. Kindly asking if anyone can advice how to design that kind of integration ? thanks amir

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## [Use EuclideanDistancePointMetric in python itk](https://discourse.itk.org/t/use-euclideandistancepointmetric-in-python-itk/1490)

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**Author:** [@Roulbac](https://discourse.itk.org/u/Roulbac)\
**Replies:** 5\
**Last updated:** [January 3, 2019, 6:29pm UTC](https://discourse.itk.org/t/use-euclideandistancepointmetric-in-python-itk/1490 "2019-01-03T18:29:05Z")

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Hi all, I need to use the EuclideanDistancePointMetric but it does not come with PyPi’s itk. I tried compiling itk with Python wrapping but I can’t find the build configuration that wraps that class, which belongs to R…

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## [elasitx performance issue with itk \> 4.8](https://discourse.itk.org/t/elasitx-performance-issue-with-itk-4-8/1467)

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**Author:** [@tvanwalsum](https://discourse.itk.org/u/tvanwalsum)\
**Replies:** 19\
**Last updated:** [December 24, 2018, 4:06pm UTC](https://discourse.itk.org/t/elasitx-performance-issue-with-itk-4-8/1467 "2018-12-24T16:06:49Z")

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Hi all, I recently upgraded my elastix registration software, and simultatneously upgrading itk from 4.8 to the 4.13. This greatly affected the registration timings (3 to 4-fold slower). After some testing, I found it t…

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## [itkMath FloatAlmostEqual question](https://discourse.itk.org/t/itkmath-floatalmostequal-question/1493)

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**Author:** [@mihail.isakov](https://discourse.itk.org/u/mihail.isakov)\
**Replies:** 4\
**Last updated:** [December 24, 2018, 2:48pm UTC](https://discourse.itk.org/t/itkmath-floatalmostequal-question/1493 "2018-12-24T14:48:26Z")

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It looks like FloatAlmostEqual function (itkMath.h) does rather similar thing twice, in particular if floats are not almost equal - subtract, abs, compare (first to epsilon, then unit of least precision), isn’t it? It is…

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## [Reference count with Python](https://discourse.itk.org/t/reference-count-with-python/1483)

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**Author:** [@finetjul](https://discourse.itk.org/u/finetjul)\
**Replies:** 7\
**Last updated:** [December 21, 2018, 9:12pm UTC](https://discourse.itk.org/t/reference-count-with-python/1483 "2018-12-21T21:12:12Z")

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Hi all, In Python, I have the following code: def generateSource(): reader = itk.ImageReader\[ImageType\].New() ... itkToVtkFilter = itk.ImageToVTKImageFilter\[ImageType\].New() itkToVtkFilter.SetInput(re…

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## [double-conversion problem in vcpkg build](https://discourse.itk.org/t/double-conversion-problem-in-vcpkg-build/1486)

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**Author:** [@dzenanz](https://discourse.itk.org/u/dzenanz)\
**Replies:** 3\
**Last updated:** [December 19, 2018, 2:19pm UTC](https://discourse.itk.org/t/double-conversion-problem-in-vcpkg-build/1486 "2018-12-19T14:19:25Z")

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I just tried building ITK using vcpkg: vcpkg install itk\[vtk\]. It fails, boiling down to double-conversion.h trying to include double-conversion/utils.h and not finding it. Is this a problem in ITK or double-conversion, …

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## [Post-reconstruction suppression of CT streaking artifacts?](https://discourse.itk.org/t/post-reconstruction-suppression-of-ct-streaking-artifacts/1487)

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**Author:** [@dzenanz](https://discourse.itk.org/u/dzenanz)\
**Replies:** 2\
**Last updated:** [December 18, 2018, 9:38pm UTC](https://discourse.itk.org/t/post-reconstruction-suppression-of-ct-streaking-artifacts/1487 "2018-12-18T21:38:23Z")

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Is there some source code available to deal with streaking artifacts arising from high contrast in CT images? Here is an example axial slice: The bright blob is a cross-section of carotid artery, and the streaks eman…

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## [New script for uploading binary testing data](https://discourse.itk.org/t/new-script-for-uploading-binary-testing-data/1484)

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**Author:** [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\
**Replies:** 1\
**Last updated:** [December 18, 2018, 3:02pm UTC](https://discourse.itk.org/t/new-script-for-uploading-binary-testing-data/1484 "2018-12-18T15:02:15Z")

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We now have a new script for uploading ITK binary testing data such as input and baseline images! To use the script, run ITK’s ./Utilities/SetupForDevelopment.sh to configure an account on the data.kitware.com Girder i…

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## [SimpleType m\_Var = initialValue;](https://discourse.itk.org/t/simpletype-m-var-initialvalue/651)

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**Author:** [@dzenanz](https://discourse.itk.org/u/dzenanz)\
**Replies:** 9\
**Last updated:** [December 18, 2018, 9:24am UTC](https://discourse.itk.org/t/simpletype-m-var-initialvalue/651 "2018-12-18T09:24:29Z")

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Should we move away from the practice that the member variables are initialized in the constructor, and rather move them to the declaration? At least for simple types. A “go to declaration” would also inform the programm…

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## [Python wrapping of a member function template](https://discourse.itk.org/t/python-wrapping-of-a-member-function-template/1482)

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**Author:** [@phcerdan](https://discourse.itk.org/u/phcerdan)\
**Replies:** 2\
**Last updated:** [December 17, 2018, 7:04pm UTC](https://discourse.itk.org/t/python-wrapping-of-a-member-function-template/1482 "2018-12-17T19:04:05Z")

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What is the way to wrap a member function template? Is there any macro for it? If not, anybody has experience with swig for doing it --even manually? Pinging @fbudin An example of a template function I would like to wr…

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## [Saving 4D dicom from3D volumes](https://discourse.itk.org/t/saving-4d-dicom-from3d-volumes/1472)

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**Author:** [@swetha.bsharma](https://discourse.itk.org/u/swetha.bsharma)\
**Replies:** 3\
**Last updated:** [December 17, 2018, 5:22am UTC](https://discourse.itk.org/t/saving-4d-dicom-from3d-volumes/1472 "2018-12-17T05:22:57Z")

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Hello, I have multiple 3D volume series acquired at different timestamp , the timestamps only differ by a negligible amount in units of seconds. I have collated the 3D volumes into a 4D image of type itk::Image\< Pixe…

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## [SimpleITK 1.2 Release Candidate 1](https://discourse.itk.org/t/simpleitk-1-2-release-candidate-1/1480)

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**Author:** [@blowekamp](https://discourse.itk.org/u/blowekamp)\
**Replies:** 0\
**Last updated:** [December 14, 2018, 9:40pm UTC](https://discourse.itk.org/t/simpleitk-1-2-release-candidate-1/1480 "2018-12-14T21:40:33Z")

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Announcement We are pleased to announce SimpleITK 1.2 Release candidate 1. Release Notes Improvements New look for ReadTheDocs, along with more examples and documentation. (http://simpleitk.readthedocs.io/en/master/) S…

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## [Itk or SimpleItk for PyRadiomics (in python, of course) ](https://discourse.itk.org/t/itk-or-simpleitk-for-pyradiomics-in-python-of-course/1478)

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**Author:** [@machadoL](https://discourse.itk.org/u/machadoL)\
**Replies:** 3\
**Last updated:** [December 13, 2018, 8:49pm UTC](https://discourse.itk.org/t/itk-or-simpleitk-for-pyradiomics-in-python-of-course/1478 "2018-12-13T20:49:29Z")

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Hey guys… what up? I am working with PyRadiomics in some python scripts and I saw that the examples use SimpleITK for leading the images into the processing pipeline… I’ve tried doing the same with whole ITK pack (imrea…

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## [Redhat: Compilers that do not support bool are not supported](https://discourse.itk.org/t/redhat-compilers-that-do-not-support-bool-are-not-supported/1474)

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**Author:** [@Kim\_Han\_Thung](https://discourse.itk.org/u/Kim_Han_Thung)\
**Replies:** 1\
**Last updated:** [December 13, 2018, 5:42pm UTC](https://discourse.itk.org/t/redhat-compilers-that-do-not-support-bool-are-not-supported/1474 "2018-12-13T17:42:20Z")

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Hi all, I encountered the following error when trying to build ITK. CMake Error at Modules/ThirdParty/VNL/src/vxl/config/cmake/config/VXLIntrospectionConfig.cmake:391 (message): Compilers that do not support bool are …

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## [itk.MetaDataObject.GetMetaDataObjectValue() is missing in Python](https://discourse.itk.org/t/itk-metadataobject-getmetadataobjectvalue-is-missing-in-python/1470)

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**Author:** [@finetjul](https://discourse.itk.org/u/finetjul)\
**Replies:** 2\
**Last updated:** [December 13, 2018, 11:07am UTC](https://discourse.itk.org/t/itk-metadataobject-getmetadataobjectvalue-is-missing-in-python/1470 "2018-12-13T11:07:03Z")

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Hi, When using ITK with Python, how can you get the DICOM Tags of a DICOM directory ? It seems that itk.MetaDataObject.GetMetaDataObjectValue() is missing. dicomReader = itk.ImageSeriesReader\[ImageType\].New() dicomRea…

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## [Data type for PET and MR image](https://discourse.itk.org/t/data-type-for-pet-and-mr-image/1468)

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**Author:** [@zhuangming.shen](https://discourse.itk.org/u/zhuangming.shen)\
**Replies:** 2\
**Last updated:** [December 12, 2018, 12:32am UTC](https://discourse.itk.org/t/data-type-for-pet-and-mr-image/1468 "2018-12-12T00:32:32Z")

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Hi all, I know “signed short” is usually assigned for a CT image in ITK because it’s voxel values are 16 bits integers. But how about PET image and MR image, should I also use “signed short” for them? Or use “float” ins…

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## [Discourse and itk.org expected downtime Saturday, December 15th, 2018](https://discourse.itk.org/t/discourse-and-itk-org-expected-downtime-saturday-december-15th-2018/1471)

<div class="topic-metadata">

**Author:** [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\
**Replies:** 0\
**Last updated:** [December 11, 2018, 7:25pm UTC](https://discourse.itk.org/t/discourse-and-itk-org-expected-downtime-saturday-december-15th-2018/1471 "2018-12-11T19:25:23Z")

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Hi folks, Related to Kitware’s move to its new headquarters, www.itk.org, discourse.itk.org, data.kitware.com, and open.cdash.org will temporarily be offline on Saturday, December 15. We will set up a “we are moving” p…

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## [Add internal third party module Eigen3](https://discourse.itk.org/t/add-internal-third-party-module-eigen3/1429)

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**Author:** [@phcerdan](https://discourse.itk.org/u/phcerdan)\
**Replies:** 7\
**Last updated:** [December 10, 2018, 3:07pm UTC](https://discourse.itk.org/t/add-internal-third-party-module-eigen3/1429 "2018-12-10T15:07:17Z")

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I am glad to announce that after a few force-pushes, the pull request to add Eigen3 as an internal third party module is ready for review. Kudos to @matt.mccormick @jcfr and @bpaniagua for the support :pick::balloon:! …

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