How to use OpenCV in the Flutter SDK?

Question

I have been trying to find a Flutter OpenCV library. I'm looking to handle facial recognition through eye positioning. I need this to be for both android and iOS. I found one for C++ which I think Flutter compiles to as well as Swift/Objective C libraries. I am wondering which route would be the best to go or if there is a better option.

You can try to make it available using a plugin like explained in https://flutter.io/developing-packages/ — Günter Zöchbauer, Mar 01 '18 at 18:57

score 11 · Accepted Answer · answered Mar 01 '18 at 17:31

11

Flutter is still beta and there is no OpenCV available for flutter unfortunately. But you can integrate the OpenCV native libs or sdk for both Android and IOS and invoke them through platform channels

Hope that helped!

answered Mar 01 '18 at 17:31

Hemanth Raj

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I tried this solution but I've got errors with JNI while setting up OpenCV native libs for Android on Windows : https://stackoverflow.com/questions/54450398/how-to-fix-gradle-task-appmergedebugjnilibfolders-in-flutter-gradle-build-fo – Jérémy Jan 30 '19 at 22:34

score 6 · Answer 2 · answered Dec 31 '18 at 09:34

6

Flutter plugin package is avialable - https://pub.dartlang.org/packages/flutter_opencv

You can try this and it might be helpful.

answered Dec 31 '18 at 09:34

Manoj Arun S

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The package doesn't seem to be a complete port of OpenCV – praneybehl Apr 27 '19 at 00:51
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It's also currently only Android – Bourne Jul 31 '19 at 00:45

score 3 · Answer 3 · answered Jul 10 '20 at 11:47

3

Now there seems to be a pretty new opencv package providing a binding to OpenCV-4.x, published in April 2020.

However at the moment it is not a full binding yet.

answered Jul 10 '20 at 11:47

matkv

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score 1 · Answer 4 · answered Jul 29 '20 at 00:50

If you want to use OpenCV in you C++ code (because, e.g., you need more heavy C++ manipulation instead of simply calling functions), then have a look at this answer: How to use OpenCV 4 in native C++ of Flutter? at July 2020.

Disclaimer: I wrote that answer.

How to use OpenCV in the Flutter SDK?

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