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Add CI support for building Windows on ARM wheels#1143

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MugundanMCW wants to merge1 commit intoopencv:4.x
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@MugundanMCWMugundanMCW commentedSep 12, 2025•
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PR Description:

  • The adoption of Windows on ARM (WoA) devices is steadily increasing, yet many Python wheels are still not available for this platform.
  • GitHub Actions now offer native CI runners for Windows on ARM devices (windows-11-arm), enabling automated builds and testing.
  • Currently, official OpenCV Python wheels are not provided for Windows ARM64 and thus users/developers were facing difficulties using popular OpenCV library natively.
  • This PR introduces support for building OpenCV wheels on Windows ARM64, improving accessibility for developers and end users on this emerging platform.
  • Closes:Can not build the project in W11 on ARM64 #1092,Provide prebuilt Windows ARM64 packages #806

Changes Proposed:

  • Added CI workflow for building and testing OpenCV wheels on new Windows on ARM github runners
  • Added platform markers to use stable available NumPy for Windows on ARM builds.
  • Added Windows on ARM specific condition logic to use NEON as baseline and dispatch unit, since MSVC lacks support for NEON_FP16, NEON_BF16 and NEON_DOTPROD intrinsics.

install_requires= [
'numpy<2.0; python_version<"3.9"',
'numpy(>=2, <2.3.0); python_version>="3.9"',
'numpy(>=2, <=2.3.1); python_version>="3.9"',
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Hi@asmorkalov
Just to note here that these changes become obsolete if thisPR got merged.

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Can not build the project in W11 on ARM64

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@MugundanMCW@asmorkalov
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