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Enable checkerboard detection with a central / corner marker on a black tile#25808

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asmorkalov merged 2 commits intoopencv:4.xfrom
DmitryYurov:bug-25806-checkerboard-marker-black-tile
Jul 8, 2024
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Enable checkerboard detection with a central / corner marker on a black tile#25808
asmorkalov merged 2 commits intoopencv:4.xfrom
DmitryYurov:bug-25806-checkerboard-marker-black-tile

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@DmitryYurov
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This pull request closes the issue #25806.

The issue doesn't require any documentation - it's quite intuitive that the detection result shouldn't depend on the color of the marker's tile.

Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

  • I agree to contribute to the project under Apache 2 License.
  • To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
  • The PR is proposed to the proper branch
  • There is a reference to the original bug report and related work
  • There is accuracy test, performance test and test data in opencv_extra repository, if applicable
    Patch to opencv_extra has the same branch name.
  • The feature is well documented and sample code can be built with the project CMake

This commit enables a user to properly detect markers on the
checkerboard also in the case when the corner marker is on a
black tile
@opencv-alalek
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/cc @D-Alex

@DmitryYurov
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Failing test is seemingly not related to my changes (test_video fails by timeout in many other pull requests)

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👍

@asmorkalov asmorkalov merged commit 31b308f into opencv:4.x Jul 8, 2024
@asmorkalov asmorkalov self-assigned this Jul 8, 2024
@asmorkalov asmorkalov mentioned this pull request Jul 16, 2024
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findChessboardCornersSB with CALIB_CB_MARKER: works only with central / corner marker on a white tile

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