Q&A

[rainyl]

1. used environment variables

• OPENCV_DART_DISABLE_AUTO_BUILD if set, prebuilt libs will not be downloaded
• OPENCV_DART_ANDROID_ENABLED_ABI Android Plugin custom arch support #211
  • e.g., export OPENCV_DART_ANDROID_ENABLED_ABI="arm64-v8a,armeabi-v7a" and then x86_64 will not be downloaded or will be deleted if exist, will be useful if you want to build apk for specific platforms
• OPENCV_DART_LIB_PATH ONLY for debug or test, if set, library will be loaded from it.

2. libopencv_dart.so/.dll/.framework/.dylib not found

• for windows, check whether the opencv_dart.dll exists, typically it should exists in ~\AppData\Local\Pub\Cache\hosted\pub.dev\opencv_dart-<version>\windows
• for linux, check whether libopencv_dart.so exists, ~/.pub-cache/hosted/pub.dev/opencv_dart-<version>/linux
• for macos, check ~/.pub-cache/hosted/pub.dev/opencv_dart-<version>/macos
• for ios, check opencv_dart.xcframework, Got it working on simulator, issue on real device - what am I missing? #200 (comment)
• for android, check android/src/main/jniLibs

3. symbol xxx not found #200 (comment)

4. E/cv::error()(15188): OpenCV(4.10.0) Error: #179 (comment)

5. instructions for cache cleaning up, manual setup

• You can run manual setup if the auto setup doesn't work, pass -f option to overwrite existed files, e.g., dart run opencv_dart:setup android -a arm64-v8a -f

6. video #159 (comment)

7. Pixel accessing via ptrAt opencv/opencv#11125

[hanan0007]

can i use this package to find the similar images ?

[rainyl]

can i use this package to find the similar images ?

Theoretically, yes. You can use this package to do anything that opencv can do.

Remember to open new issues instead of replying to this one if you have more questions.