# Latest

**URL:** https://discourse.itk.org/latest.md?page=26

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

**Page:** 27

---

## [is itk：：invoke Must single thread ？](https://discourse.itk.org/t/is-itk-invoke-must-single-thread/5770)

<div class="topic-metadata">

**Author:** [@ma1282029525](https://discourse.itk.org/u/ma1282029525)\
**Replies:** 2\
**Last updated:** [March 5, 2023, 7:45am UTC](https://discourse.itk.org/t/is-itk-invoke-must-single-thread/5770 "2023-03-05T07:45:36Z")

</div>

I have a ui, and then a registration module. I start a thread in the registration module. When the registration ends, I invoke an event to be handled by the ui, but there are always some error messages.

---

## [Job Opportunity at the Allen Institute: Image Registration & Multimodal Data Integration](https://discourse.itk.org/t/job-opportunity-at-the-allen-institute-image-registration-multimodal-data-integration/5782)

<div class="topic-metadata">

**Author:** [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\
**Replies:** 0\
**Last updated:** [March 3, 2023, 6:05pm UTC](https://discourse.itk.org/t/job-opportunity-at-the-allen-institute-image-registration-multimodal-data-integration/5782 "2023-03-03T18:05:12Z")

</div>

Scientist I – Image Registration & Multimodal Data Integration The mission of the Allen Institute is to unlock the complexities of bioscience and advance our knowledge to improve human health. Using an open science, mul…

---

## [Extending ITK for C++ and Python: Build and Test ITK External Modules in a GitHub Action](https://discourse.itk.org/t/extending-itk-for-c-and-python-build-and-test-itk-external-modules-in-a-github-action/5781)

<div class="topic-metadata">

**Author:** [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\
**Replies:** 0\
**Last updated:** [March 3, 2023, 6:02pm UTC](https://discourse.itk.org/t/extending-itk-for-c-and-python-build-and-test-itk-external-modules-in-a-github-action/5781 "2023-03-03T18:02:57Z")

</div>

By: Tom Birdsong, Matt McCormick , Lucas Gandel, Simon Rit , Jean-Christophe Fillion-Robin, Stephen Aylward Medical imaging is an ever-changing domain, with technological advances introducing exciting new data and proce…

---

## [About itk image format conversion](https://discourse.itk.org/t/about-itk-image-format-conversion/5780)

<div class="topic-metadata">

**Author:** [@ma1282029525](https://discourse.itk.org/u/ma1282029525)\
**Replies:** 1\
**Last updated:** [March 3, 2023, 1:45pm UTC](https://discourse.itk.org/t/about-itk-image-format-conversion/5780 "2023-03-03T13:45:13Z")

</div>

I am now completing the interface of a registration module, but the images given to me by others are many sequence images in gdcm format. How can I convert these images into the format available for registration.

---

## [How to Debug WASI Pipelines with ITK-Wasm](https://discourse.itk.org/t/how-to-debug-wasi-pipelines-with-itk-wasm/5778)

<div class="topic-metadata">

**Author:** [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\
**Replies:** 0\
**Last updated:** [March 2, 2023, 6:07pm UTC](https://discourse.itk.org/t/how-to-debug-wasi-pipelines-with-itk-wasm/5778 "2023-03-02T18:07:39Z")

</div>

By: Matt McCormick , Mary Elise Dedicke , Jean-Christophe Fillion-Robin , Will Schroeder Effective debugging results in effective programming; itk-wasm makes effective debugging of WebAssembly possible. In this tutorial…

---

## [HausdorffDistance on an image with multiple Labels](https://discourse.itk.org/t/hausdorffdistance-on-an-image-with-multiple-labels/4582)

<div class="topic-metadata">

**Author:** [@toladner](https://discourse.itk.org/u/toladner)\
**Replies:** 6\
**Last updated:** [March 2, 2023, 1:15pm UTC](https://discourse.itk.org/t/hausdorffdistance-on-an-image-with-multiple-labels/4582 "2023-03-02T13:15:09Z")

</div>

I’m evaluating the predictions of a lung lobe segmentation model using the HausdorffDistanceImageFilter. Thus, I’m passing the ground truth and the prediction (both have equal size with 6 labels) into the image filter. …

---

## [Rigid + Affine registration 2D implementation with iteration](https://discourse.itk.org/t/rigid-affine-registration-2d-implementation-with-iteration/5767)

<div class="topic-metadata">

**Author:** [@banikr](https://discourse.itk.org/u/banikr)\
**Replies:** 6\
**Last updated:** [March 2, 2023, 12:15am UTC](https://discourse.itk.org/t/rigid-affine-registration-2d-implementation-with-iteration/5767 "2023-03-02T00:15:23Z")

</div>

I am trying to apply Euler2D rotation with Affine registration in an iterative manner. Something done here https://itk.org/ITKSoftwareGuide/html/Book2/ITKSoftwareGuide-Book2ch3.html#x26-110175r30 at section 3.6.5. Now …

---

## [Getting Displacement Data for specific points](https://discourse.itk.org/t/getting-displacement-data-for-specific-points/5753)

<div class="topic-metadata">

**Author:** [@elapins](https://discourse.itk.org/u/elapins)\
**Replies:** 11\
**Last updated:** [March 1, 2023, 5:17pm UTC](https://discourse.itk.org/t/getting-displacement-data-for-specific-points/5753 "2023-03-01T17:17:23Z")

</div>

I successfully applied the following type of registration, and would like to query specific points within the image and get the corresponding displacement for each point in the image. I have a composite outTx and can’t …

---

## [Mismatched dimensions error](https://discourse.itk.org/t/mismatched-dimensions-error/5773)

<div class="topic-metadata">

**Author:** [@xxbilian](https://discourse.itk.org/u/xxbilian)\
**Replies:** 1\
**Last updated:** [March 1, 2023, 2:17pm UTC](https://discourse.itk.org/t/mismatched-dimensions-error/5773 "2023-03-01T14:17:32Z")

</div>

Hello, I have a segmentation image of a main image. however, when I try to open the segmentation image on top of the main image, I received an error, “mismatched dimensions”. the main image dimension is 300, 450, 450, w…

---

## [On the coordinate transformation of vtk and itk](https://discourse.itk.org/t/on-the-coordinate-transformation-of-vtk-and-itk/5761)

<div class="topic-metadata">

**Author:** [@ma1282029525](https://discourse.itk.org/u/ma1282029525)\
**Replies:** 4\
**Last updated:** [February 28, 2023, 2:39pm UTC](https://discourse.itk.org/t/on-the-coordinate-transformation-of-vtk-and-itk/5761 "2023-02-28T14:39:10Z")

</div>

The program I wrote uses itk image to read dicom image, and uses vtk to display it. What transformation should I make to make vtk display correctly? I know to use 0020 0037 tag to correct it. Can anyone tell me the detai…

---

## [Displacement field transform in 3D](https://discourse.itk.org/t/displacement-field-transform-in-3d/5759)

<div class="topic-metadata">

**Author:** [@mokshagna\_sai\_teja](https://discourse.itk.org/u/mokshagna_sai_teja)\
**Replies:** 6\
**Last updated:** [February 28, 2023, 1:10am UTC](https://discourse.itk.org/t/displacement-field-transform-in-3d/5759 "2023-02-28T01:10:05Z")

</div>

temp is a forward 3D displacement field of size DxMxNx3. displacement\_image = sitk.GetImageFromArray(np.double(temp),sitk.sitkVectorFloat64) tx = sitk.DisplacementFieldTransform(displacement\_image) tx.SetInterpolator(…

---

## [Operator to flatten masks based on an intensity value](https://discourse.itk.org/t/operator-to-flatten-masks-based-on-an-intensity-value/5766)

<div class="topic-metadata">

**Author:** [@Besler](https://discourse.itk.org/u/Besler)\
**Replies:** 2\
**Last updated:** [February 27, 2023, 4:53pm UTC](https://discourse.itk.org/t/operator-to-flatten-masks-based-on-an-intensity-value/5766 "2023-02-27T16:53:11Z")

</div>

I find myself in need of a filter that takes a set of binary masks-real valued image pairs and returns a single mask where the value is the mask index with the largest real value. I use this constantly for flattening log…

---

## [What is the use of mesh?](https://discourse.itk.org/t/what-is-the-use-of-mesh/5758)

<div class="topic-metadata">

**Author:** [@rohit\_inippully](https://discourse.itk.org/u/rohit_inippully)\
**Replies:** 1\
**Last updated:** [February 27, 2023, 4:21pm UTC](https://discourse.itk.org/t/what-is-the-use-of-mesh/5758 "2023-02-27T16:21:41Z")

</div>

I just started with Itk tutorials. I am wondering what is the practical use of mesh and different types of cells? Thanks in advance.

---

## [SimpleITK: Registration working but applying the transform to a single point does not](https://discourse.itk.org/t/simpleitk-registration-working-but-applying-the-transform-to-a-single-point-does-not/5728)

<div class="topic-metadata">

**Author:** [@Bouthros](https://discourse.itk.org/u/Bouthros)\
**Replies:** 6\
**Last updated:** [February 24, 2023, 11:58pm UTC](https://discourse.itk.org/t/simpleitk-registration-working-but-applying-the-transform-to-a-single-point-does-not/5728 "2023-02-24T23:58:20Z")

</div>

Hi! I hope I am putting this question in the proper category. I followed the Jupyter notebook concerning the 3D registration and I tried to apply it to my problem. Here is my problem: I have 2 axial series, 1 fixed an…

---

## [New external module: ITKTopologyControl](https://discourse.itk.org/t/new-external-module-itktopologycontrol/5393)

<div class="topic-metadata">

**Author:** [@dyoll](https://discourse.itk.org/u/dyoll)\
**Replies:** 2\
**Last updated:** [February 24, 2023, 9:06pm UTC](https://discourse.itk.org/t/new-external-module-itktopologycontrol/5393 "2023-02-24T21:06:03Z")

</div>

Feel free to try out this new external module: GitHub - dyollb/ITKTopologyControl: ITK external module to control topology of binary mask regions It kind of works like morphological closing, but in the erode phase it pr…

---

## [ITK MATLAB Python Tutorial](https://discourse.itk.org/t/itk-matlab-python-tutorial/5754)

<div class="topic-metadata">

**Author:** [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\
**Replies:** 0\
**Last updated:** [February 24, 2023, 4:16pm UTC](https://discourse.itk.org/t/itk-matlab-python-tutorial/5754 "2023-02-24T16:16:01Z")

</div>

By: Matt McCormick , Tom Birdsong, Brad Moore , Jake McCall, Stephen Aylward In recent years, MathWork’s MATLAB added Python support. This unlocks the capabilities of the powerful open source scientific Python ecosystem…

---

## [why prefer isotropic over anisotropic for medical image datasets?](https://discourse.itk.org/t/why-prefer-isotropic-over-anisotropic-for-medical-image-datasets/5751)

<div class="topic-metadata">

**Author:** [@loa2023\_fme](https://discourse.itk.org/u/loa2023_fme)\
**Replies:** 1\
**Last updated:** [February 24, 2023, 2:23pm UTC](https://discourse.itk.org/t/why-prefer-isotropic-over-anisotropic-for-medical-image-datasets/5751 "2023-02-24T14:23:18Z")

</div>

refer ResampleVolumesToBeIsotropic.cxx I am new to medical image processing. I can understand that visualization on a plane can be distorted for anisotropic data, but I cannot appreciate “I do not think 3D is informati…

---

## [Edge Issues: Displacement Registration](https://discourse.itk.org/t/edge-issues-displacement-registration/5749)

<div class="topic-metadata">

**Author:** [@elapins](https://discourse.itk.org/u/elapins)\
**Replies:** 0\
**Last updated:** [February 23, 2023, 8:04pm UTC](https://discourse.itk.org/t/edge-issues-displacement-registration/5749 "2023-02-23T20:04:04Z")

</div>

I have been trying to register the images attached via the displacement registration method provided: Image Registration Method Displacement 1 — SimpleITK 2.0rc2 documentation However, it seems that the edges of my resu…

---

## [After the rotation of the image, some parts will be missing. How can we enlarge the visual field of the image to get the complete image?](https://discourse.itk.org/t/after-the-rotation-of-the-image-some-parts-will-be-missing-how-can-we-enlarge-the-visual-field-of-the-image-to-get-the-complete-image/5748)

<div class="topic-metadata">

**Author:** [@ljjiayou](https://discourse.itk.org/u/ljjiayou)\
**Replies:** 1\
**Last updated:** [February 23, 2023, 10:25am UTC](https://discourse.itk.org/t/after-the-rotation-of-the-image-some-parts-will-be-missing-how-can-we-enlarge-the-visual-field-of-the-image-to-get-the-complete-image/5748 "2023-02-23T10:25:31Z")

</div>

transform = sitk.Euler3DTransform(center ,0.5,0,0,(100,0,0)) image\_resampled = sitk.Resample(moving\_image, transform) My image is private and can’t be released, my image is 3D.

---

## [Why is the image transformed into an all-black image?And the origin of the image doesn't change](https://discourse.itk.org/t/why-is-the-image-transformed-into-an-all-black-image-and-the-origin-of-the-image-doesnt-change/5731)

<div class="topic-metadata">

**Author:** [@ljjiayou](https://discourse.itk.org/u/ljjiayou)\
**Replies:** 3\
**Last updated:** [February 23, 2023, 9:02am UTC](https://discourse.itk.org/t/why-is-the-image-transformed-into-an-all-black-image-and-the-origin-of-the-image-doesnt-change/5731 "2023-02-23T09:02:50Z")

</div>

def get\_center(img): """ This function returns the physical center point of a 3d sitk image :param img: The sitk image we are trying to find the center of :return: The physical center point of the image …

---

## [Registering binary mask to x-ray image (2D to 2D) rigid image registration SimpleITK](https://discourse.itk.org/t/registering-binary-mask-to-x-ray-image-2d-to-2d-rigid-image-registration-simpleitk/5741)

<div class="topic-metadata">

**Author:** [@isuruwi](https://discourse.itk.org/u/isuruwi)\
**Replies:** 3\
**Last updated:** [February 22, 2023, 11:44pm UTC](https://discourse.itk.org/t/registering-binary-mask-to-x-ray-image-2d-to-2d-rigid-image-registration-simpleitk/5741 "2023-02-22T23:44:04Z")

</div>

I have an xray image and it’s corresponding predicted binary mask image (2D). I’m currently using simpleITK to rigidly register the binary mask to the x-ray image. However, when I apply the final transform to the moving …

---

## [Digital Image Correlation](https://discourse.itk.org/t/digital-image-correlation/5745)

<div class="topic-metadata">

**Author:** [@elapins](https://discourse.itk.org/u/elapins)\
**Replies:** 0\
**Last updated:** [February 22, 2023, 3:54pm UTC](https://discourse.itk.org/t/digital-image-correlation/5745 "2023-02-22T15:54:55Z")

</div>

Can anyone help with getting a registration framework set up for the matching portion of a Digital image correlation program?? Please feel free to send me a message too! Thank you!!

---

## [how to solve "Error:exception occured during image IO"?](https://discourse.itk.org/t/how-to-solve-error-exception-occured-during-image-io/5740)

<div class="topic-metadata">

**Author:** [@yuliang\_zhang](https://discourse.itk.org/u/yuliang_zhang)\
**Replies:** 1\
**Last updated:** [February 22, 2023, 2:38pm UTC](https://discourse.itk.org/t/how-to-solve-error-exception-occured-during-image-io/5740 "2023-02-22T14:38:15Z")

</div>

when i try open a series of dicom ultrasound image,it shows this error,what’s wrong?

---

## [Universal Registration Framework](https://discourse.itk.org/t/universal-registration-framework/5729)

<div class="topic-metadata">

**Author:** [@elapins](https://discourse.itk.org/u/elapins)\
**Replies:** 9\
**Last updated:** [February 21, 2023, 6:32pm UTC](https://discourse.itk.org/t/universal-registration-framework/5729 "2023-02-21T18:32:56Z")

</div>

Hello, Is it possible to write a registration framework that would work for any image pair? Meaning, the same inputs and framework would work on image pairs of different specimens? Or is the ITK registration framework …

---

## [ITKElastix 0.16.0 has been released!](https://discourse.itk.org/t/itkelastix-0-16-0-has-been-released/5736)

<div class="topic-metadata">

**Author:** [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\
**Replies:** 0\
**Last updated:** [February 21, 2023, 3:30pm UTC](https://discourse.itk.org/t/itkelastix-0-16-0-has-been-released/5736 "2023-02-21T15:30:06Z")

</div>

By: Matt McCormick , Niels Dekker , Konstantinos Ntatsis, Marius Staring We are exceedingly pleased to announce the release of ITKElastix 0.16.0, an ITK module that provides Python and C++ interfaces to elastix, a tool…

---

## [On the error of an itk image pointer assignment](https://discourse.itk.org/t/on-the-error-of-an-itk-image-pointer-assignment/5733)

<div class="topic-metadata">

**Author:** [@ma1282029525](https://discourse.itk.org/u/ma1282029525)\
**Replies:** 0\
**Last updated:** [February 21, 2023, 10:58am UTC](https://discourse.itk.org/t/on-the-error-of-an-itk-image-pointer-assignment/5733 "2023-02-21T10:58:14Z")

</div>

When I pass the itk image between the two classes, random errors will occur in the assignment. Sometimes the code can run normally, sometimes errors will occur, and access conflicts will occur. itkimage=myReader-\>GetItk…

---

## [About using mask and sampling simultaneously in registration](https://discourse.itk.org/t/about-using-mask-and-sampling-simultaneously-in-registration/5712)

<div class="topic-metadata">

**Author:** [@ma1282029525](https://discourse.itk.org/u/ma1282029525)\
**Replies:** 2\
**Last updated:** [February 21, 2023, 10:52am UTC](https://discourse.itk.org/t/about-using-mask-and-sampling-simultaneously-in-registration/5712 "2023-02-21T10:52:17Z")

</div>

When these two strategies are used at the same time, is the sampling point selected only in the mask area?

---

## [Order o Rotation Euler3D](https://discourse.itk.org/t/order-o-rotation-euler3d/4536)

<div class="topic-metadata">

**Author:** [@Luis\_Carlos\_Carneiro](https://discourse.itk.org/u/Luis_Carlos_Carneiro)\
**Replies:** 17\
**Last updated:** [February 21, 2023, 10:03am UTC](https://discourse.itk.org/t/order-o-rotation-euler3d/4536 "2023-02-21T10:03:08Z")

</div>

Dear All, If I do a Registration of Euler3D. The result transform has a Rotation and a Translation. Which is the first operation in Rotation. Is in X? Or is in Z? Thanks, Luís Gonçalves

---

## [SimpleITK & MetaIO: changing the .raw extension](https://discourse.itk.org/t/simpleitk-metaio-changing-the-raw-extension/5724)

<div class="topic-metadata">

**Author:** [@ingmar.voigt](https://discourse.itk.org/u/ingmar.voigt)\
**Replies:** 2\
**Last updated:** [February 20, 2023, 2:20pm UTC](https://discourse.itk.org/t/simpleitk-metaio-changing-the-raw-extension/5724 "2023-02-20T14:20:23Z")

</div>

Dear all, When I save MHD images using https://simpleitk.org/doxygen/latest/html/classitk\_1\_1simple\_1\_1ImageFileWriter.html, is there a way to save with a different extension other than “.raw”/“.zraw”? VTK does support…

---

## [Coordinate System and Registration Transform Results](https://discourse.itk.org/t/coordinate-system-and-registration-transform-results/5718)

<div class="topic-metadata">

**Author:** [@elapins](https://discourse.itk.org/u/elapins)\
**Replies:** 3\
**Last updated:** [February 20, 2023, 2:02pm UTC](https://discourse.itk.org/t/coordinate-system-and-registration-transform-results/5718 "2023-02-20T14:02:56Z")

</div>

When I print the parameters for a certain image registration, what point is this translating?? the top left? or the center? I understand that the resulting transform transforms the fixed image to the moving, but what exa…

[Previous page](https://discourse.itk.org/latest.md?page=25)

[Next page](https://discourse.itk.org/latest.md?page=27)