# Latest **URL:** https://discourse.itk.org/latest.md?page=89 [Latest](https://discourse.itk.org/latest.md) · [Categories](https://discourse.itk.org/categories.md) · [Tags](https://discourse.itk.org/tags.md) **Page:** 90 --- ## [itk:GradientDescentOptimizer seems not to return deterministic results with identical start conditions](https://discourse.itk.org/t/itk-gradientdescentoptimizer-seems-not-to-return-deterministic-results-with-identical-start-conditions/1684)
**Author:** [@donelron](https://discourse.itk.org/u/donelron)\ **Replies:** 1\ **Last updated:** [March 19, 2019, 12:57pm UTC](https://discourse.itk.org/t/itk-gradientdescentoptimizer-seems-not-to-return-deterministic-results-with-identical-start-conditions/1684 "2019-03-19T12:57:02Z")
I am using the following pieceo of code which is basically copied from the ITK examples in order to perform a registration with an itk:GradientDescentOptimizer: #include "itkImageRegistrationMethod.h" #include "itkTrans… --- ## [Unknown tags reading tiff](https://discourse.itk.org/t/unknown-tags-reading-tiff/1719)
**Author:** [@Gib](https://discourse.itk.org/u/Gib)\ **Replies:** 7\ **Last updated:** [April 1, 2019, 3:08am UTC](https://discourse.itk.org/t/unknown-tags-reading-tiff/1719 "2019-04-01T03:08:04Z")
I have received a 3D tiff file that gives me warnings about unknown tags when I try to read it with ImageFileReader in ITK 4.12.2. The unknown tags are: 50838, 50839. The execution is stopped with no other information … --- ## [Building and integrating external modules](https://discourse.itk.org/t/building-and-integrating-external-modules/884)
**Author:** [@Gordian](https://discourse.itk.org/u/Gordian)\ **Replies:** 9\ **Last updated:** [September 26, 2018, 8:10pm UTC](https://discourse.itk.org/t/building-and-integrating-external-modules/884 "2018-09-26T20:10:38Z")
Hello again, I want to use an external module e.g. itkOBBLabelMap. My approach to buidl ITK with the external module: The following is a brief list of instructions to get a external module into ITK: cd ITK/Modules/… --- ## [error LNK2038: mismatch detected for '\_ITERATOR\_DEBUG\_LEVEL':](https://discourse.itk.org/t/error-lnk2038-mismatch-detected-for-iterator-debug-level/1718)
**Author:** [@Gib](https://discourse.itk.org/u/Gib)\ **Replies:** 2\ **Last updated:** [March 29, 2019, 7:13pm UTC](https://discourse.itk.org/t/error-lnk2038-mismatch-detected-for-iterator-debug-level/1718 "2019-03-29T19:13:37Z")
error LNK2038: mismatch detected for ‘\_ITERATOR\_DEBUG\_LEVEL’: value ‘2’ doesn’t match value ‘0’ in compress.obj error LNK2038: mismatch detected for ‘RuntimeLibrary’: value ‘MDd\_DynamicDebug’ doesn’t match value ‘MD\_Dyn… --- ## [How to apply a .vtk file as mask to my 3d Image](https://discourse.itk.org/t/how-to-apply-a-vtk-file-as-mask-to-my-3d-image/1717)
**Author:** [@siaeleni](https://discourse.itk.org/u/siaeleni)\ **Replies:** 1\ **Last updated:** [March 29, 2019, 1:45pm UTC](https://discourse.itk.org/t/how-to-apply-a-vtk-file-as-mask-to-my-3d-image/1717 "2019-03-29T13:45:09Z")
Hello, I have a .vtk model that I have created and I want to apply that as a mask to my 3d Image. Do you have any idea how can I approach that? Thanks, Eleni --- ## [How to replace ImageMaskSpatialObject::GetAxisAlignedBoundingBoxRegion() calls?](https://discourse.itk.org/t/how-to-replace-imagemaskspatialobject-getaxisalignedboundingboxregion-calls/1709)
**Author:** [@Niels\_Dekker](https://discourse.itk.org/u/Niels_Dekker)\ **Replies:** 6\ **Last updated:** [March 28, 2019, 4:20pm UTC](https://discourse.itk.org/t/how-to-replace-imagemaskspatialobject-getaxisalignedboundingboxregion-calls/1709 "2019-03-28T16:20:23Z")
While trying to get the elastix image registration toolbox compatible with ITK5, we encountered compilation errors, because itk::ImageMaskSpatialObject::GetAxisAlignedBoundingBoxRegion() was recently removed: Do you h… --- ## [Python package to find vessel or tube centerlines now available!](https://discourse.itk.org/t/python-package-to-find-vessel-or-tube-centerlines-now-available/1715)
**Author:** [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\ **Replies:** 0\ **Last updated:** [March 27, 2019, 7:00pm UTC](https://discourse.itk.org/t/python-package-to-find-vessel-or-tube-centerlines-now-available/1715 "2019-03-27T19:00:14Z")
ITKv5 can now wrap any user-developed module into a pip-installable package that has an intuitive, pythonic interface. A great example is the MinimalPathExtraction module that is featured in this post. To find centerli… --- ## [Miele-LXIV](https://discourse.itk.org/t/miele-lxiv/1713)
**Author:** [@zdavatz](https://discourse.itk.org/u/zdavatz)\ **Replies:** 0\ **Last updated:** [March 27, 2019, 12:57pm UTC](https://discourse.itk.org/t/miele-lxiv/1713 "2019-03-27T12:57:48Z")
Hi I would like to announce the Miele-LXIV project, a 100% DICOM standard compliant image viewer for macOS. If you want build the project with all its dependencies yourself then start here: https://github.com/bettar/mi… --- ## [skeletonize 3D liver vessels](https://discourse.itk.org/t/skeletonize-3d-liver-vessels/1711)
**Author:** [@Marco\_Festugato](https://discourse.itk.org/u/Marco_Festugato)\ **Replies:** 1\ **Last updated:** [March 26, 2019, 5:38pm UTC](https://discourse.itk.org/t/skeletonize-3d-liver-vessels/1711 "2019-03-26T17:38:53Z")
I guys, I have to skeletonize a 3D vascular net of the liver vessels. Any ideas/code/examples that could help me? I know that it exists the class itkBinaryThinningImageFilter but it works only for 2D images… Thanks in a… --- ## [Adaptive Histogram Equalization for 3D images- long run-time](https://discourse.itk.org/t/adaptive-histogram-equalization-for-3d-images-long-run-time/1705)
**Author:** [@Courtney\_Ambrozic](https://discourse.itk.org/u/Courtney_Ambrozic)\ **Replies:** 4\ **Last updated:** [March 26, 2019, 3:56pm UTC](https://discourse.itk.org/t/adaptive-histogram-equalization-for-3d-images-long-run-time/1705 "2019-03-26T15:56:57Z")
Hello, I’m running the AdaptiveHistogramEqualizationImageFilter() on a 3D image that is 512x512x197. Currently, the run-time for this histogram equalization is about three hours. Does anyone have an idea as to why it … --- ## [Get original SeriesInstanceUID before AddSeriesRestriction();](https://discourse.itk.org/t/get-original-seriesinstanceuid-before-addseriesrestriction/1698)
**Author:** [@jonasteuwen](https://discourse.itk.org/u/jonasteuwen)\ **Replies:** 1\ **Last updated:** [March 24, 2019, 2:43pm UTC](https://discourse.itk.org/t/get-original-seriesinstanceuid-before-addseriesrestriction/1698 "2019-03-24T14:43:13Z")
I have a 4D dicom series in a folder (which could contain multiple of those) for which (0020,0100) TemporalPositionIdentifier contains the identifier of the time point. I want to convert this to a 4D (or a series of 3D i… --- ## [Implementing Non-Square Boundary Conditions](https://discourse.itk.org/t/implementing-non-square-boundary-conditions/1690)
**Author:** [@Besler](https://discourse.itk.org/u/Besler)\ **Replies:** 2\ **Last updated:** [March 22, 2019, 8:17pm UTC](https://discourse.itk.org/t/implementing-non-square-boundary-conditions/1690 "2019-03-22T20:17:37Z")
I’m wanting to implement a filter using itkDenseFiniteDifferenceImageFilter with non-square boundary conditions. The problem is defined as: I have many PDE problems I would like to solve with similar boundary conditi… --- ## [ITK 4.13.2 has been released!](https://discourse.itk.org/t/itk-4-13-2-has-been-released/1696)
**Author:** [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\ **Replies:** 0\ **Last updated:** [March 22, 2019, 2:40pm UTC](https://discourse.itk.org/t/itk-4-13-2-has-been-released/1696 "2019-03-22T14:40:17Z")
On behalf of the Insight Toolkit (ITK) Community, we are happy to announce the release of ITK 4.13.2! ITK is an open-source, cross-platform library for multidimensional image analysis. Release files can be downloaded f… --- ## [Calculating Eigenvectors using Python and ITK](https://discourse.itk.org/t/calculating-eigenvectors-using-python-and-itk/1638)
**Author:** [@vero](https://discourse.itk.org/u/vero)\ **Replies:** 2\ **Last updated:** [March 22, 2019, 8:50am UTC](https://discourse.itk.org/t/calculating-eigenvectors-using-python-and-itk/1638 "2019-03-22T08:50:09Z")
Hey, I’m trying to calculate eigenvalues and -vectors of a hessian matrix I received with the HessianRecursiveGaussianImageFilter using Python. So far I found neither in SimpleITK nor in ITK an algorithm that would work… --- ## [\ Unknown/Unhandle MediaStorage, but Pixel Data element found](https://discourse.itk.org/t/unknown-unknown-unhandle-mediastorage-but-pixel-data-element-found/1693)
**Author:** [@zandarina](https://discourse.itk.org/u/zandarina)\ **Replies:** 3\ **Last updated:** [March 21, 2019, 6:56pm UTC](https://discourse.itk.org/t/unknown-unknown-unhandle-mediastorage-but-pixel-data-element-found/1693 "2019-03-21T18:56:38Z")
Dear all, everytime i write the output of a filter, i get this warning. It doesn´t throw any error, and it writes well, but it is a bit annoying to get this warning as an output for each slice as i like to follow the ou… --- ## [SymmetricEigenAnalysisFixedDimension in Python](https://discourse.itk.org/t/symmetriceigenanalysisfixeddimension-in-python/1652)
**Author:** [@vero](https://discourse.itk.org/u/vero)\ **Replies:** 2\ **Last updated:** [March 21, 2019, 7:41pm UTC](https://discourse.itk.org/t/symmetriceigenanalysisfixeddimension-in-python/1652 "2019-03-21T19:41:37Z")
Hey, I’m trying to use SymmetricEigenAnalysisFixedDimension or SymmetricEigenAnalysisFixedDimensionImageFilter in Python by initializing the image filter like in other ITK python example: eig = itk.SymmetricEigenAnaly… --- ## [How to write CMakeLists.txt on my own?](https://discourse.itk.org/t/how-to-write-cmakelists-txt-on-my-own/1691)
**Author:** [@EE18D504\_SINDHURA\_C](https://discourse.itk.org/u/EE18D504_SINDHURA_C)\ **Replies:** 2\ **Last updated:** [March 21, 2019, 1:01pm UTC](https://discourse.itk.org/t/how-to-write-cmakelists-txt-on-my-own/1691 "2019-03-21T13:01:51Z")
How to write CMakeLists.txt on my own? What are the rules and commands to be used? I am getting a few errors when I do it on my own. --- ## [World coordinate do not give me the correct dicom coordinate](https://discourse.itk.org/t/world-coordinate-do-not-give-me-the-correct-dicom-coordinate/1644)
**Author:** [@zandarina](https://discourse.itk.org/u/zandarina)\ **Replies:** 12\ **Last updated:** [March 21, 2019, 12:25pm UTC](https://discourse.itk.org/t/world-coordinate-do-not-give-me-the-correct-dicom-coordinate/1644 "2019-03-21T12:25:41Z")
Dear all, I use itk to perform 2d segmentation of a 3d volume given by a dicom series and i need to add some seeds with the mouse for some 2d slices. So i am forced to show a 2d slice in vtk obtained with itk (using e… --- ## [How to use NumericTraits in itk python binding](https://discourse.itk.org/t/how-to-use-numerictraits-in-itk-python-binding/1689)
**Author:** [@asertyuio](https://discourse.itk.org/u/asertyuio)\ **Replies:** 2\ **Last updated:** [March 20, 2019, 6:39pm UTC](https://discourse.itk.org/t/how-to-use-numerictraits-in-itk-python-binding/1689 "2019-03-20T18:39:03Z")
I’m using itk.GetImageViewFromArray(image) to view an np image as itk image. How to get the type of pixel, and get information about it using NumericTraits ? In C++ I was using for example itk::NumericTraits\:… --- ## [ITK Pythonic interface - filter output](https://discourse.itk.org/t/itk-pythonic-interface-filter-output/1628)
**Author:** [@mafuentes](https://discourse.itk.org/u/mafuentes)\ **Replies:** 11\ **Last updated:** [March 20, 2019, 12:58pm UTC](https://discourse.itk.org/t/itk-pythonic-interface-filter-output/1628 "2019-03-20T12:58:48Z")
Hello, with the new wrappers for ITK 5.0 Beta and all the facilities with the new pythonic interface I was wondering how can I especify a filter’s output type on the parameters. The idea is to change this: rescaler = … --- ## [Numpy vnl bridge unexpected behavior](https://discourse.itk.org/t/numpy-vnl-bridge-unexpected-behavior/1659)
**Author:** [@simon.rit](https://discourse.itk.org/u/simon.rit)\ **Replies:** 7\ **Last updated:** [March 20, 2019, 8:48am UTC](https://discourse.itk.org/t/numpy-vnl-bridge-unexpected-behavior/1659 "2019-03-20T08:48:03Z")
Hi, I tend to write too many things on the same line in Python and this caused an unexpected behavior for the numpy vnl bridge. It occurred in a different context but I have the following minimal example import itk … --- ## [CannySegmentationLevelSetImageFilter in Simple ITK](https://discourse.itk.org/t/cannysegmentationlevelsetimagefilter-in-simple-itk/1688)
**Author:** [@pettaa123](https://discourse.itk.org/u/pettaa123)\ **Replies:** 2\ **Last updated:** [March 19, 2019, 10:29pm UTC](https://discourse.itk.org/t/cannysegmentationlevelsetimagefilter-in-simple-itk/1688 "2019-03-19T22:29:43Z")
I am thinking about integrating ITK’s CannySegmentationLevelSetImageFilter into an own SimpleITK filter in order to bring it into my csharp code. Is this recommendable? I am asking because I couldn’t find an example on… --- ## [Getting an interpolated image based on sparse pixel values](https://discourse.itk.org/t/getting-an-interpolated-image-based-on-sparse-pixel-values/1682)
**Author:** [@sedghi](https://discourse.itk.org/u/sedghi)\ **Replies:** 10\ **Last updated:** [March 19, 2019, 2:50pm UTC](https://discourse.itk.org/t/getting-an-interpolated-image-based-on-sparse-pixel-values/1682 "2019-03-19T14:50:56Z")
Lets assume that we have a 3D image of size 100x100x100, and we only want to set pixel values for 1000 locations in this 3D image. Is it possible to get the interpolated image based on these sparse pixel values? which fi… --- ## [Free Biomedical Image Analysis and Visualization 3-day Course](https://discourse.itk.org/t/free-biomedical-image-analysis-and-visualization-3-day-course/1538)
**Author:** [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\ **Replies:** 3\ **Last updated:** [March 19, 2019, 2:46pm UTC](https://discourse.itk.org/t/free-biomedical-image-analysis-and-visualization-3-day-course/1538 "2019-03-19T14:46:41Z")
Kitware has organized a free 3-day biomedical image analysis and visualization course to be held March 12-14, 2019, at Kitware’s Carrboro, NC, USA office. Similar to last year, the course is designed for clinical resear… --- ## [itk::ImageRegistrationMethod does not return the best value from all iterations](https://discourse.itk.org/t/itk-imageregistrationmethod-does-not-return-the-best-value-from-all-iterations/1681)
**Author:** [@donelron](https://discourse.itk.org/u/donelron)\ **Replies:** 1\ **Last updated:** [March 19, 2019, 1:28pm UTC](https://discourse.itk.org/t/itk-imageregistrationmethod-does-not-return-the-best-value-from-all-iterations/1681 "2019-03-19T13:28:26Z")
I am using the following lines of code (basically copied from an the ITK example https://itk.org/Wiki/ITK/Examples/Registration/MutualInformation) to register two synthetic images with Mutual information: #include "itkI… --- ## [Problem with building ITK in release](https://discourse.itk.org/t/problem-with-building-itk-in-release/1677)
**Author:** [@donelron](https://discourse.itk.org/u/donelron)\ **Replies:** 2\ **Last updated:** [March 18, 2019, 7:53pm UTC](https://discourse.itk.org/t/problem-with-building-itk-in-release/1677 "2019-03-18T19:53:38Z")
I have been following the instructions in this video: https://www.youtube.com/watch?v=vZOMu5YSfoI to set up ITK 4.13.1 on windows10 and currently having an issue with the release build of ITK. I put the ITK sources int… --- ## [Porting https://itk.org/Wiki/ITK/Examples/Metrics/MeanSquaresImageToImageMetric from C++ to Python](https://discourse.itk.org/t/porting-https-itk-org-wiki-itk-examples-metrics-meansquaresimagetoimagemetric-from-c-to-python/1670)
**Author:** [@nicill](https://discourse.itk.org/u/nicill)\ **Replies:** 8\ **Last updated:** [March 18, 2019, 7:03pm UTC](https://discourse.itk.org/t/porting-https-itk-org-wiki-itk-examples-metrics-meansquaresimagetoimagemetric-from-c-to-python/1670 "2019-03-18T19:03:24Z")
Hi all, this is my first question here, I hope I understood the rules. I have been using itk (C++ version) for many years now, so I am quite familiar with it. Recently I have been exploring the possibility to use it als… --- ## [any simple example code for learning c++ and ITK for a beginner?](https://discourse.itk.org/t/any-simple-example-code-for-learning-c-and-itk-for-a-beginner/1680)
**Author:** [@EE18D504\_SINDHURA\_C](https://discourse.itk.org/u/EE18D504_SINDHURA_C)\ **Replies:** 1\ **Last updated:** [March 18, 2019, 6:11pm UTC](https://discourse.itk.org/t/any-simple-example-code-for-learning-c-and-itk-for-a-beginner/1680 "2019-03-18T18:11:37Z")
I am new to c++ and ITK. I learned to build and running examples. I want to write a basic program when I can give my input image(not through command window) directly in the code and do certain changes like scaling,inten… --- ## [Problem in combine axial, sagittal, coronal images to 3d image(.mha)](https://discourse.itk.org/t/problem-in-combine-axial-sagittal-coronal-images-to-3d-image-mha/1389)
**Author:** [@guojunjie4SD](https://discourse.itk.org/u/guojunjie4SD)\ **Replies:** 8\ **Last updated:** [March 18, 2019, 3:19pm UTC](https://discourse.itk.org/t/problem-in-combine-axial-sagittal-coronal-images-to-3d-image-mha/1389 "2019-03-18T15:19:40Z")
Hi everyone: I need some help! I make my demo and test data. (download from http://www.insight-journal.org/midas/bitstream/download/3527). It works well. But when i use axial, sagittal, coronal dicom images in thre… --- ## [ITKTwoProjectionRegistration available as PyPI package?](https://discourse.itk.org/t/itktwoprojectionregistration-available-as-pypi-package/1625)
**Author:** [@kendall](https://discourse.itk.org/u/kendall)\ **Replies:** 5\ **Last updated:** [March 15, 2019, 9:55pm UTC](https://discourse.itk.org/t/itktwoprojectionregistration-available-as-pypi-package/1625 "2019-03-15T21:55:21Z")
Is the ITKTwoProjectionRegistration module available somewhere on PyPI (ie, can I install it via pip?). [Previous page](https://discourse.itk.org/latest.md?page=88) [Next page](https://discourse.itk.org/latest.md?page=90)