OpenCv release in the official page, https://opencv.org/releases.html does not provide contrib release. For Android, contrib can be found https://pullrequest.opencv.org/buildbot/builders/3_4-contrib_pack-contrib-android. But where can I find windows OpenCv contrib?
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You have to compile it yourself. Check the github repo. – Scott Mudge Dec 07 '18 at 17:24
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So if you need some functionality from contrib packages, you must compile complete opencv yourself. There is no simple way to compile only some contrib package[s] if you have downloaded a pre-built opencv library. Correct? – Palo Aug 28 '20 at 17:49
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You can find the zip file for OpenCV Contrib from here
The installation instructions from this blog worked fine for me.

minakshi das
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You can download github.com/opencv/opencv_contrib
And use CMake to make opencv_contrib's include, dll, lib directory
I don't know if it's a good explanation, here are installation instruction

DaeSeok Song
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