error in adding extra module in opencv

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Hi!

I don’t have a clear answer, but I’ll share my experience so far with Opencv module.

I recommend you to work with the at least sources in order to keep opencv and opencv contrib synced, and because releases of opencv contrib are not that frequent. If you are planning to keep it automatically updated, you might want to use scripts. In a bash script (update.sh):

#!/bin/bash 
cd opencv && git pull 
cd ../opencv_contrib && git pull

then with powershell:

$src = "I:/opencv-master/opencv"
$srcextra =
"I:/opencv-master/opencv/opencv_contrib"
$build = "I:/opencv-master/build"
$target = "Visual Studio 15 2017
Win64" bash update.sh cd $build

rm -Recurse -Force CMake* cmake -G
$target -T v140,host=x64 `
    -DOPENCV_ENABLE_NONFREE=1 `
    -DOPENCV_EXTRA_MODULES_PATH="../opencv_contrib/modules"
`
    ../opencv | Tee-Object -Variable RESULT if("$RESULT" -eq 1) {
    "cmake didn't succeed, exiting."
    exit } msbuild.exe OpenCV.sln /verbosity:m /m cd ..