# \#opencv

**URL:** https://discourse.slicer.org/tag/opencv/67.md

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

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## [OpenCV extension build fails since June ITK upgrade](https://discourse.slicer.org/t/opencv-extension-build-fails-since-june-itk-upgrade/38158)

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**Author:** [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Replies:** 5\
**Last updated:** [September 6, 2024, 11:59am UTC](https://discourse.slicer.org/t/opencv-extension-build-fails-since-june-itk-upgrade/38158 "2024-09-06T11:59:58Z")

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Hi all, The OpenCV extension build fails on all three platform since June 4, most probably due to the ITK upgrade: ENH: Update ITK to 5.4.0 · Slicer/Slicer@acf3dd4 · GitHub This is the first failure on the dashboard: h…

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## [\[Linux\] SliceOpenCV build](https://discourse.slicer.org/t/linux-sliceopencv-build/23269)

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**Author:** [@adamrankin](https://discourse.slicer.org/u/adamrankin)\
**Replies:** 2\
**Last updated:** [May 5, 2022, 2:58pm UTC](https://discourse.slicer.org/t/linux-sliceopencv-build/23269 "2022-05-05T14:58:37Z")

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I am trying to fix the SlicerOpenCV build in order to re-enable the extension, but I am experiencing some roadblocks. I am able to successfully build the extension on Ubuntu 20.04 with gcc 9.x. I notice that the build m…

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## [Question about calibration](https://discourse.slicer.org/t/question-about-calibration/23035)

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**Author:** [@user5](https://discourse.slicer.org/u/user5)\
**Replies:** 1\
**Last updated:** [April 20, 2022, 4:17pm UTC](https://discourse.slicer.org/t/question-about-calibration/23035 "2022-04-20T16:17:56Z")

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Hello everyone. I am trying yo use ArUco Marker to be the tracker to perform a Brain surgery navigation test. I have followed every step in tutorial , the needle still go to wrong location. I already retry it for many t…

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## [The Module, OpenCV,does't show on the Module face](https://discourse.slicer.org/t/the-module-opencv-doest-show-on-the-module-face/18237)

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**Author:** [@slicer365](https://discourse.slicer.org/u/slicer365)\
**Replies:** 1\
**Last updated:** [June 21, 2021, 4:37am UTC](https://discourse.slicer.org/t/the-module-opencv-doest-show-on-the-module-face/18237 "2021-06-21T04:37:23Z")

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Sys:WIN 64 V 4.1120210226 As is this pic.,I have installed the OpenCV , but when I restart the Slicer , I dont find it on the Module face. I searched all modules,no result.

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## [Error when installing opencv with Python Interactor on mac](https://discourse.slicer.org/t/error-when-installing-opencv-with-python-interactor-on-mac/15544)

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**Author:** [@HodaGH](https://discourse.slicer.org/u/HodaGH)\
**Replies:** 3\
**Last updated:** [January 15, 2021, 10:08pm UTC](https://discourse.slicer.org/t/error-when-installing-opencv-with-python-interactor-on-mac/15544 "2021-01-15T22:08:01Z")

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Hi everyone, I have MacOS 10.14. I’m trying to install opencv in the python interactor by this code: from slicer.util import pip\_install pip\_install(“opencv”) I get this error: ERROR: Could not find a version that s…

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## [Error when importing cv2.aruco in python file](https://discourse.slicer.org/t/error-when-importing-cv2-aruco-in-python-file/11176)

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**Author:** [@cyrillajarge](https://discourse.slicer.org/u/cyrillajarge)\
**Replies:** 2\
**Last updated:** [April 20, 2020, 6:44pm UTC](https://discourse.slicer.org/t/error-when-importing-cv2-aruco-in-python-file/11176 "2020-04-20T18:44:00Z")

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Hi guys, I’m developing a module for a school project in which I need to use OpenCV combined with Aruco. I have installed the extension SlicerOpenCV and OpenCV is working correctly when I import cv2 in my python file. …

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## [Update ITK to f6c37d?](https://discourse.slicer.org/t/update-itk-to-f6c37d/10396)

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**Author:** [@adamrankin](https://discourse.slicer.org/u/adamrankin)\
**Replies:** 4\
**Last updated:** [April 2, 2020, 6:13pm UTC](https://discourse.slicer.org/t/update-itk-to-f6c37d/10396 "2020-04-02T18:13:14Z")

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@jcfr @lassoan @pieper (and anyone else you think might want to comment) SlicerOpenCV is broken with the update to ITKv5, and requires the fix Could this be either cherry picked or the branch advanced to this commit? …

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## [OpenCV extension missing from latest stable and nightly versions](https://discourse.slicer.org/t/opencv-extension-missing-from-latest-stable-and-nightly-versions/4771)

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**Author:** [@RebeccaHisey](https://discourse.slicer.org/u/RebeccaHisey)\
**Replies:** 2\
**Last updated:** [November 16, 2018, 12:00pm UTC](https://discourse.slicer.org/t/opencv-extension-missing-from-latest-stable-and-nightly-versions/4771 "2018-11-16T12:00:52Z")

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Operating system: windows 10 Slicer version: 4.10.0 (stable) The slicer openCV extension appears to be missing from the latest stable (4.10.0, downloaded on 15/11/2018) and any of recent the nightly builds (tried versi…

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## [SlicerOpenCV nightly build failed](https://discourse.slicer.org/t/sliceropencv-nightly-build-failed/1058)

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**Author:** [@tdiprima](https://discourse.slicer.org/u/tdiprima)\
**Replies:** 0\
**Last updated:** [September 15, 2017, 2:05pm UTC](https://discourse.slicer.org/t/sliceropencv-nightly-build-failed/1058 "2017-09-15T14:05:53Z")

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Hi guys, SlicerPathology depends on SlicerOpenCV… I hope you can help me out. Here’s the build error. And it says: -- MD5 hash of /.../SlicerOpenCV-build/OpenCV-prefix/src/3.1.0.tar.gz does not match expected v…