# Latest

**URL:** https://discourse.itk.org/latest.md?page=77

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

**Page:** 78

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## [RTK installation problem any help appreciated](https://discourse.itk.org/t/rtk-installation-problem-any-help-appreciated/2481)

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**Author:** [@sag](https://discourse.itk.org/u/sag)\
**Replies:** 9\
**Last updated:** [December 8, 2019, 9:13pm UTC](https://discourse.itk.org/t/rtk-installation-problem-any-help-appreciated/2481 "2019-12-08T21:13:10Z")

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Hi, Firstly thank you for the help! I did download the RTK, then I separately from ITK tried to build the RTK source code but failed with different configuration errors in CMake before generate and build it in vs2017…

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## [Python pycharm and code completion](https://discourse.itk.org/t/python-pycharm-and-code-completion/1697)

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**Author:** [@asertyuio](https://discourse.itk.org/u/asertyuio)\
**Replies:** 16\
**Last updated:** [December 7, 2019, 1:35pm UTC](https://discourse.itk.org/t/python-pycharm-and-code-completion/1697 "2019-12-07T13:35:42Z")

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I’m using pycharm as a python ide. It appears that except in the console, pycharm don’t propose any completion after typing itk module name. Code is running fine. In the python console, completion is working as expected…

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## [Floodfill Python ITK](https://discourse.itk.org/t/floodfill-python-itk/2453)

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**Author:** [@fraca](https://discourse.itk.org/u/fraca)\
**Replies:** 9\
**Last updated:** [December 6, 2019, 3:27pm UTC](https://discourse.itk.org/t/floodfill-python-itk/2453 "2019-12-06T15:27:05Z")

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There’s a function in python to floodfill an image that has been previously segmented?

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## [Histogram Python](https://discourse.itk.org/t/histogram-python/2480)

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**Author:** [@fraca](https://discourse.itk.org/u/fraca)\
**Replies:** 1\
**Last updated:** [December 6, 2019, 2:59pm UTC](https://discourse.itk.org/t/histogram-python/2480 "2019-12-06T14:59:48Z")

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Hi, i’m trying to write these lines in Python but i dont’t know how to declare the variables (size,upperbound,lowerbound,measurement). Can you help me? typedef itk::Statistics::Histogram\<PixelType, 1\> HistogramType; P…

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## [How to work with .mha + .raw files](https://discourse.itk.org/t/how-to-work-with-mha-raw-files/2478)

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**Author:** [@sag](https://discourse.itk.org/u/sag)\
**Replies:** 3\
**Last updated:** [December 6, 2019, 2:54pm UTC](https://discourse.itk.org/t/how-to-work-with-mha-raw-files/2478 "2019-12-06T14:54:08Z")

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Hi, I am trying to see how to read data sets of lets say a ct scan (e.g. sinogram): following are my concerns: how to get the data set of projections. any public site or university site how to use ITK VTK to reconstru…

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## [Error while installing the Simple ITK manually](https://discourse.itk.org/t/error-while-installing-the-simple-itk-manually/2479)

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**Author:** [@Felippe\_Trigueiro\_An](https://discourse.itk.org/u/Felippe_Trigueiro_An)\
**Replies:** 2\
**Last updated:** [December 6, 2019, 5:19am UTC](https://discourse.itk.org/t/error-while-installing-the-simple-itk-manually/2479 "2019-12-06T05:19:23Z")

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I’m trying to install the SimpleITK manually according this link Building Simple ITK manually because I need to run the Simple ITK in C++ using the qmake, but I’m getting this error: CMake Error at PythonVirtualEnvInsta…

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## [itk::ImageIO, itk::ImageFileReader, itk::ImageFileWriter, ITK-\>Examples-\>IO-\>RGBImageReadWrite](https://discourse.itk.org/t/itk-imageio-itk-imagefilereader-itk-imagefilewriter-itk-examples-io-rgbimagereadwrite/2476)

<div class="topic-metadata">

**Author:** [@sag](https://discourse.itk.org/u/sag)\
**Replies:** 4\
**Last updated:** [December 5, 2019, 4:09pm UTC](https://discourse.itk.org/t/itk-imageio-itk-imagefilereader-itk-imagefilewriter-itk-examples-io-rgbimagereadwrite/2476 "2019-12-05T16:09:53Z")

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Hi, I built the example RGBImageReadWrite.cxx using CMake config generate with CMakeLists.txt and source file for the example and generate bin and built that in vs2017… so far so good, but when I run this example with f…

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## [cannot build Filtering Examples in vs2017](https://discourse.itk.org/t/cannot-build-filtering-examples-in-vs2017/2473)

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**Author:** [@sag](https://discourse.itk.org/u/sag)\
**Replies:** 2\
**Last updated:** [December 4, 2019, 11:03pm UTC](https://discourse.itk.org/t/cannot-build-filtering-examples-in-vs2017/2473 "2019-12-04T23:03:53Z")

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Hi, I am new to ITK, however very experienced software engineer. I have download, built, and installed ITK on my windows 10 pc. I also have CMake 3.15.4. I created a CMake project using CMakeLists.txt samples in example…

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## [itk::Image support for non-contiguous memory?](https://discourse.itk.org/t/itk-image-support-for-non-contiguous-memory/2443)

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**Author:** [@Bram](https://discourse.itk.org/u/Bram)\
**Replies:** 4\
**Last updated:** [December 4, 2019, 6:10pm UTC](https://discourse.itk.org/t/itk-image-support-for-non-contiguous-memory/2443 "2019-12-04T18:10:20Z")

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(this might as well fit in the beginner category :wink:) I’m looking at integrating ITK into our libraries, which would mean creating a bridge between itk::Image and our in-house data structure for 3D uniform grid volum…

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## [Rotating an Oblique Image](https://discourse.itk.org/t/rotating-an-oblique-image/2470)

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**Author:** [@kleingeo](https://discourse.itk.org/u/kleingeo)\
**Replies:** 2\
**Last updated:** [December 4, 2019, 4:11pm UTC](https://discourse.itk.org/t/rotating-an-oblique-image/2470 "2019-12-04T16:11:21Z")

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I have been trying to rotate an image that has quaterion coordinates and is in an oblique reference frame, but I am not entirely sure how this is done. When I apply the same rotations (two rotations about the x and y axe…

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## [Cryptic error message when failing to load frames of different sizes](https://discourse.itk.org/t/cryptic-error-message-when-failing-to-load-frames-of-different-sizes/2463)

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**Author:** [@lassoan](https://discourse.itk.org/u/lassoan)\
**Replies:** 3\
**Last updated:** [December 3, 2019, 8:27pm UTC](https://discourse.itk.org/t/cryptic-error-message-when-failing-to-load-frames-of-different-sizes/2463 "2019-12-03T20:27:04Z")

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We use itkImageFileReader in Slicer to read image stacks and it works well. However, time to time users report that the reader fails with this error: Exception from vtkITK MegaMacro: itk::InvalidRequestedRegionError (…

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## [Eigen Configuration Error with SimpleITK Packaging](https://discourse.itk.org/t/eigen-configuration-error-with-simpleitk-packaging/2468)

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**Author:** [@blowekamp](https://discourse.itk.org/u/blowekamp)\
**Replies:** 2\
**Last updated:** [December 3, 2019, 5:48pm UTC](https://discourse.itk.org/t/eigen-configuration-error-with-simpleitk-packaging/2468 "2019-12-03T17:48:40Z")

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I am working on getting SimpleITK packaging working with ITKv5. I have enchanted the following unusual error during ITK configuration: CMake Error at Modules/ThirdParty/Eigen3/src/itkeigen/CMakeLists.txt:124 (message): …

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## [Writing into file from CommandIterationUpdate](https://discourse.itk.org/t/writing-into-file-from-commanditerationupdate/2467)

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**Author:** [@machadoL](https://discourse.itk.org/u/machadoL)\
**Replies:** 4\
**Last updated:** [December 3, 2019, 3:08pm UTC](https://discourse.itk.org/t/writing-into-file-from-commanditerationupdate/2467 "2019-12-03T15:08:10Z")

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Hey Guys, I am running ITK registration examples V4 (ImageRegistration4.cpp and the other on a roll), and I have a question: How can I write the outputs in theCommandIterationUpdate class at each iteration step into a t…

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## [registration metric for rgb image](https://discourse.itk.org/t/registration-metric-for-rgb-image/2439)

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**Author:** [@kayarre](https://discourse.itk.org/u/kayarre)\
**Replies:** 4\
**Last updated:** [December 2, 2019, 7:40pm UTC](https://discourse.itk.org/t/registration-metric-for-rgb-image/2439 "2019-12-02T19:40:27Z")

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How can you evaluate a registration metric for an rgb image. the way I have done is by decomposing each channel and evaluating each one, but then I have three different metric values. how are those three metrics relate…

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## [ITK Data for examples](https://discourse.itk.org/t/itk-data-for-examples/2466)

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**Author:** [@machadoL](https://discourse.itk.org/u/machadoL)\
**Replies:** 2\
**Last updated:** [December 2, 2019, 7:38pm UTC](https://discourse.itk.org/t/itk-data-for-examples/2466 "2019-12-02T19:38:47Z")

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Guys, I am trying to reproduce the ITK example ImageRegistration8.cxx in the examples folder. This example uses the following files: brainweb1e1a10f20.mha and brainweb1e1a10f20Rot10Tx15.mha. Although, when I look into…

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## [Any viewer like slicer or itk snap to view images with ".scn" extension?](https://discourse.itk.org/t/any-viewer-like-slicer-or-itk-snap-to-view-images-with-scn-extension/2465)

<div class="topic-metadata">

**Author:** [@EE18D504\_SINDHURA\_C](https://discourse.itk.org/u/EE18D504_SINDHURA_C)\
**Replies:** 0\
**Last updated:** [December 2, 2019, 6:06am UTC](https://discourse.itk.org/t/any-viewer-like-slicer-or-itk-snap-to-view-images-with-scn-extension/2465 "2019-12-02T06:06:59Z")

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I need to write the output into analyse 7.5 format. I know about .hdr and .nii . What is this .scvn format and how to view it? Is there any way to link it with ITK?

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## [How to pick filters available in ITK for 3D medical image segmentation](https://discourse.itk.org/t/how-to-pick-filters-available-in-itk-for-3d-medical-image-segmentation/2206)

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**Author:** [@Jigabytes](https://discourse.itk.org/u/Jigabytes)\
**Replies:** 2\
**Last updated:** [December 2, 2019, 4:17am UTC](https://discourse.itk.org/t/how-to-pick-filters-available-in-itk-for-3d-medical-image-segmentation/2206 "2019-12-02T04:17:01Z")

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Hi All, I was going over filters available in itk to develop and implement segmentation algorithm for a 3D CT scan image. There are so many filters to pick and choose for each stages of segmentation. Is there guidance o…

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## [CurvatureAnisotropicDiff creates different result relative to volume size](https://discourse.itk.org/t/curvatureanisotropicdiff-creates-different-result-relative-to-volume-size/2437)

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**Author:** [@Amine](https://discourse.itk.org/u/Amine)\
**Replies:** 11\
**Last updated:** [December 1, 2019, 3:20pm UTC](https://discourse.itk.org/t/curvatureanisotropicdiff-creates-different-result-relative-to-volume-size/2437 "2019-12-01T15:20:22Z")

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Hi, in an attempt to get a preview of what CurvatureAnisotropicDiffusion will produce with less processing time i tried to run it in on a cropped volume to serve as a sample, however the final result on the complete volu…

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## [KdTree Python](https://discourse.itk.org/t/kdtree-python/2427)

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**Author:** [@fraca](https://discourse.itk.org/u/fraca)\
**Replies:** 3\
**Last updated:** [December 1, 2019, 3:17pm UTC](https://discourse.itk.org/t/kdtree-python/2427 "2019-12-01T15:17:47Z")

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There’s a way to implement itk::Statistics::WeightedCentroidKdTreeGenerator and itk::Statistics::KdTreeBasedKmeansEstimator in python? EDIT: i’m trying also to use itk::SmoothingRecursiveGaussianImageFilter but it seems…

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## [How to flip an image about a line defined by me](https://discourse.itk.org/t/how-to-flip-an-image-about-a-line-defined-by-me/2403)

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**Author:** [@EE18D504\_SINDHURA\_C](https://discourse.itk.org/u/EE18D504_SINDHURA_C)\
**Replies:** 3\
**Last updated:** [November 30, 2019, 4:57pm UTC](https://discourse.itk.org/t/how-to-flip-an-image-about-a-line-defined-by-me/2403 "2019-11-30T16:57:46Z")

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I have a 3D volume data and I want to flip the image (not with the central vertical line) with a plane that is predefined. Is there any work done in this direction in itk or sitk?

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## [fast marching question](https://discourse.itk.org/t/fast-marching-question/2461)

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**Author:** [@kayarre](https://discourse.itk.org/u/kayarre)\
**Replies:** 0\
**Last updated:** [November 29, 2019, 1:59pm UTC](https://discourse.itk.org/t/fast-marching-question/2461 "2019-11-29T13:59:13Z")

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Hi, I am attempting to remove part of the background of an image as it causes issues with the registration pipeline (i think). I am using a combination of FastMarchingUpwindGradientImageFilter and ScalarChanAndVeseDense…

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## [Linear interpolation and image direction](https://discourse.itk.org/t/linear-interpolation-and-image-direction/2458)

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**Author:** [@Elli](https://discourse.itk.org/u/Elli)\
**Replies:** 1\
**Last updated:** [November 28, 2019, 3:13pm UTC](https://discourse.itk.org/t/linear-interpolation-and-image-direction/2458 "2019-11-28T15:13:26Z")

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Dear all, I am trying to figure out one discrepancy I cannot explain. If I read in a mask with say direction identity and I linearly interpolate it I get slightly different results than when I interpolate this mask wit…

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## [Changes In ITK Mattes Mutual Information Metric](https://discourse.itk.org/t/changes-in-itk-mattes-mutual-information-metric/2353)

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**Author:** [@machadoL](https://discourse.itk.org/u/machadoL)\
**Replies:** 40\
**Last updated:** [November 28, 2019, 1:22pm UTC](https://discourse.itk.org/t/changes-in-itk-mattes-mutual-information-metric/2353 "2019-11-28T13:22:57Z")

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Hi, Everyone! I have little experience on ITK, and little knowledge on C++, although, I am doing some studies on Mutual Information Metric in Registration Pipelines. :smile: I’ve been reading a lot about registration, …

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## [New free video tutorials! VTK.js and OHIF web apps](https://discourse.itk.org/t/new-free-video-tutorials-vtk-js-and-ohif-web-apps/2456)

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**Author:** [@pieper](https://discourse.itk.org/u/pieper)\
**Replies:** 0\
**Last updated:** [November 27, 2019, 2:50pm UTC](https://discourse.itk.org/t/new-free-video-tutorials-vtk-js-and-ohif-web-apps/2456 "2019-11-27T14:50:44Z")

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There’s a lot of great material here about how to develop web app, and also covers itk.js in the context of VTK.js and OHIF. https://discourse.vtk.org/t/new-free-video-tutorials-vtk-js-and-ohif-web-apps/2164

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## [Is there any filter replaced the itkdifferenceimagefilter in ITK4.5?](https://discourse.itk.org/t/is-there-any-filter-replaced-the-itkdifferenceimagefilter-in-itk4-5/2454)

<div class="topic-metadata">

**Author:** [@Ranglage](https://discourse.itk.org/u/Ranglage)\
**Replies:** 1\
**Last updated:** [November 27, 2019, 2:23pm UTC](https://discourse.itk.org/t/is-there-any-filter-replaced-the-itkdifferenceimagefilter-in-itk4-5/2454 "2019-11-27T14:23:05Z")

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Since the itkdifferenceimagefilter has removed from ITK5.0. Is there any filter replaced the itkdifferenceimagefilter from ITK4.5?

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## [CannyFilter Python ITK](https://discourse.itk.org/t/cannyfilter-python-itk/2435)

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**Author:** [@fraca](https://discourse.itk.org/u/fraca)\
**Replies:** 2\
**Last updated:** [November 27, 2019, 1:59pm UTC](https://discourse.itk.org/t/cannyfilter-python-itk/2435 "2019-11-27T13:59:01Z")

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I’m trying to reproduce this example in python https://itk.org/ITKExamples/src/Filtering/ImageFeature/DetectEdgesWithCannyFilter/Documentation.html but i have an error: TypeError: \<module 'ITKSmoothing'\> is a built-in mo…

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## [Job Openings](https://discourse.itk.org/t/job-openings/2449)

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**Author:** [@Ashish](https://discourse.itk.org/u/Ashish)\
**Replies:** 0\
**Last updated:** [November 27, 2019, 5:26am UTC](https://discourse.itk.org/t/job-openings/2449 "2019-11-27T05:26:31Z")

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The Center for Biomedical Image Computing & Analytics at the University of Pennsylvania is looking for talented software engineers with 1-2 years of professional experience in C++, ITK, VTK, MITK, Qt, Python, medical ima…

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## [How to migrate old codes those were used itkAffineGeometryFrame to ITK5.0?](https://discourse.itk.org/t/how-to-migrate-old-codes-those-were-used-itkaffinegeometryframe-to-itk5-0/2446)

<div class="topic-metadata">

**Author:** [@mikehaoming](https://discourse.itk.org/u/mikehaoming)\
**Replies:** 2\
**Last updated:** [November 26, 2019, 7:16pm UTC](https://discourse.itk.org/t/how-to-migrate-old-codes-those-were-used-itkaffinegeometryframe-to-itk5-0/2446 "2019-11-26T19:16:24Z")

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As our old project use itkAffineGeometryFrame in a lot of code files. But itkAffineGeometryFrame is removed in ITK5.0. How to migrate these codes to ITK5.0?

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## [Research associate position at the University of Virginia](https://discourse.itk.org/t/research-associate-position-at-the-university-of-virginia/2389)

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**Author:** [@ntustison](https://discourse.itk.org/u/ntustison)\
**Replies:** 1\
**Last updated:** [November 26, 2019, 6:24pm UTC](https://discourse.itk.org/t/research-associate-position-at-the-university-of-virginia/2389 "2019-11-26T18:24:00Z")

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The Department of Radiology & Medical Imaging’s Research Division at the University of Virginia is seeking candidates for a full-time Research Associate position. The successful candidate will be responsible for developi…

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## [How to create vtkUnstructuredGrid from an itk::Image?](https://discourse.itk.org/t/how-to-create-vtkunstructuredgrid-from-an-itk-image/2364)

<div class="topic-metadata">

**Author:** [@Sara\_Caffe](https://discourse.itk.org/u/Sara_Caffe)\
**Replies:** 11\
**Last updated:** [November 26, 2019, 12:53pm UTC](https://discourse.itk.org/t/how-to-create-vtkunstructuredgrid-from-an-itk-image/2364 "2019-11-26T12:53:47Z")

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Hi, I have binary label files in itk::Image. I have gone through a few examples in ITK and VTK. What I understood, we need to create the cell type object for generating a specific mesh in both ITK and Vtk. For example, …

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