Install&Use opencv on MacOS(arm64)

Install script link->click here

Environment

Xcode 15.1 Build version 15C65

xcode-select version 2397

Python 3.9.6

swift-driver version: 1.87.3 Apple Swift version 5.9.2 (swiftlang-5.9.2.2.56 clang-1500.1.0.2.5) Target: arm64-apple-macosx13.0

Steps

Install Cmake

  1. Get Cmake v3.24.2 package 
    mkdir ~/Downloads/CMake
curl --silent --location --retry 3 "https://github.com/Kitware/CMake/releases/download/v3.24.2/cmake-3.24.2-macos-universal.dmg" --output ~/Downloads/CMake/cmake-macos.dmg
  2. Mount the image 
    yes | PAGER=cat hdiutil attach -quiet -mountpoint /Volumes/cmake-macos ~/Downloads/CMake/cmake-macos.dmg
  3. a. If you have root privilege 
    cp -R /Volumes/cmake-macos/CMake.app /Applications/
sudo "/Applications/CMake.app/Contents/bin/cmake-gui" --install=/usr/local/bin

    b. If you don’t have root privilege just add your path of CMake under mounted folder to ${PATH}

    PATH=${PATH}:/Volumes/cmake-macos/CMake.app/Contents/bin/
  4. Open a new terminal window and check 
    cmake --version

Install OpenCV

  1. Get OpenCV 4.6.0 repo 
    git clone https://github.com/opencv/opencv.git -b 4.6.0

    Extra modules

    git clone https://github.com/opencv/opencv_contrib.git -b 4.6.0
  2. Solve upcoming compilation problem in advance by editing opencv/modules/objc/generator/templates/cmakelists.template 
    vim opencv/modules/objc/generator/templates/cmakelists.template

    add following line of code to the file

    set (CMAKE_Swift_COMPILER "/usr/bin/swiftc")
  3. If you don’t have root privilege and can’t use “python” command, use below commands to bulk change python files to set “python3” as default invoker 
    grep -rn "\#\!\/usr\/bin\/env\ python"|grep -v python3|awk -F':' '{print $1}'|xargs -I@ sed -i '' 's/\#\!\/usr\/bin\/env\ python/\#\!\/usr\/bin\/env\ python3/g' @
  4. Start building… It will take some minutes 
    python3 opencv/platforms/apple/build_xcframework.py --out opencv-build --contrib opencv_contrib --iphoneos_archs arm64 --iphonesimulator_archs arm64 --iphoneos_deployment_target=17.2 --build_only_specified_archs
  5. Have fun and enjoy it

Install script link->click here

How to import and use

https://medium.com/@hdpoorna/integrating-opencv-to-your-swift-ios-project-in-xcode-and-working-with-uiimages-4c614e62ac88

Reference

https://gist.github.com/fscm/29fd23093221cf4d96ccfaac5a1a5c90 https://medium.com/@jessejiang010_14405/build-opencv-with-extra-modules-for-xcode-15-on-m2-mac-a-step-by-step-guide-f3afde83c240