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opencv_dart

OpenCV Bindings for Dart Language. Support both asynchronous and synchronous!

Package	Link	Description
	dartcv4	OpenCV bindings for Dart Language.
	opencv_dart	OpenCV for Flutter, from `2.x` , it is a wrapper of `dartcv4` to keep compatibility.

[!NOTE] WIP, APIs may change in the future, contributions are welcome!

opencv_dart
- Demos
- Supported Platforms
- Status
  - Core Modules
  - Contrib Modules
- Usage
  - Pure Dart
  - Flutter
- TODO
- Contributors
- Acknowledgement
- Star History
- License

Demos

Screenshot	Link
	example
	videoio texture renderer
	DNN MNIST inference
	stitching
	camera
	videoio

Supported Platforms

Platform	Supported	Tested	Platforms
Android	:white_check_mark:	:white_check_mark:	x86_64, arm64-v8a, armeabi-v7a
iOS	:white_check_mark:	:white_check_mark:	arm64, x64+arm64(Simulator)
Linux	:white_check_mark:	:white_check_mark:	x64, arm64
Windows	:white_check_mark:	:white_check_mark:	x64, arm64
macOS	:white_check_mark:	:white_check_mark:	x64, arm64

Status

Core Modules

module	Binding status	Test status	description
core	:white_check_mark:	:white_check_mark:	Core module
calib3d	:white_check_mark:	:white_check_mark:	Calib3D module
dnn	:white_check_mark:	:white_check_mark:	DNN module
features2d	:white_check_mark:	:white_check_mark:	Features2D module
gapi	:x:	:x:	GAPI module
highgui	:white_check_mark:	:white_check_mark:	HighGUI module
imgcodecs	:white_check_mark:	:white_check_mark:	ImageCodecs module
imgproc	:white_check_mark:	:white_check_mark:	ImageProc module
ml	:x:	:x:	ML module
objdetect	:white_check_mark:	:white_check_mark:	Object Detection module
photo	:white_check_mark:	:white_check_mark:	Photo module
stitching	:ballot_box_with_check:	:ballot_box_with_check:	Stitching module
svd	:white_check_mark:	:white_check_mark:	SVD module
video	:white_check_mark:	:white_check_mark:	Video module
videoio	:white_check_mark:	:white_check_mark:	VideoIO module

Contrib Modules

module	Binding status	Test status	description
aruco	:white_check_mark:	:white_check_mark:	ArUco module
img_hash	:white_check_mark:	:white_check_mark:	Image hashing module
cuda	:x:	:x:
wechat_qrcode	:white_check_mark:	:white_check_mark:
bgsegm	:x:	:x:
superres	:x:	:x:
xfeatures2d	:x:	:x:
ximgproc	:white_check_mark:	:white_check_mark:
xobjdetect	:white_check_mark:	:white_check_mark:
xphoto	:x:	:x:
quality	:white_check_mark:	:white_check_mark:

:x: : not finished
:ballot_box_with_check: : partially supported
:white_check_mark: : finished
modules not in the above table are not considered, contributions are welcome
~~videoio: cv.VideoCapture from file is not supported yet~~ supported now.

Usage

Pure Dart

import 'package:dartcv4/dartcv.dart' as cv;

void main() {
  final img = cv.imread("test/images/lenna.png", flags: cv.IMREAD_COLOR);
  final gray = cv.cvtColor(img, cv.COLOR_BGR2GRAY);
  print("${img.rows}, ${img.cols}");

  cv.imwrite("test_cvtcolor.png", gray);
}

Flutter

see awesome-opencv_dart and share yours

TODO

[x] ~~compile libs for android, linux~~
[x] ~~support for iOS, macOS~~
[x] ~~add more examples~~
[ ] documentation
[x] ~~modify C wrapper to catch exceptions~~
[x] Native Assets, see native-assets branch
[x] async
[x] more/full test coverage
[x] ~~directly include opencv source code, refactor cmakelists.txt~~

Contributors

_{rainy liu}	_{Abdelaziz Mahdy}	_爱因斯唐	_Gold87	_{Diego López}	_{JinWoo Jung}
_westito	_{Arnold Stark}	_{Baptiste DUPUCH}	_Escaton615	_mdeleau	_Pariterre
_{Thies Lennart Alff}	_jasaw	_{Matteo T.}