DartCv

OpenCV bindings for Dart language.

dartcv4 is only for pure dart, for Flutter, use opencv_core, if videoio module is required, use opencv_dart

Install

• dart pub add dartcv4 or Add dartcv4 to pubspec.yaml
• Prepare libraries for your platform, you have 2 options (macos: please build from source.)
  • build from source, see workflows
  • download prebuilt libraries from release
  • move/copy the libraries to a directory, e.g., ~/.dartcv
• Setup environment variables
  • windows: append the above path to PATH
  • linux: append the above path to LD_LIBRARY_PATH
  • macos: append the above path to DYLD_FALLBACK_LIBRARY_PATH

Usage

Synchronous

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);
}

Asynchronous

import 'package:dartcv4/dartcv.dart' as cv;
import 'dart:async';
void main() async {
  final img = await cv.imreadAsync("test/images/lenna.png", flags: cv.IMREAD_COLOR);
  final gray = await cv.cvtColorAsync(img, cv.COLOR_BGR2GRAY);
  print("${img.rows}, ${img.cols}");

  await cv.imwriteAsync("test_cvtcolor.png", gray);
}

Q&A

• Refer to #212 or open new issues.

More examples

Refer to tests

Screenshots

see Demos

Build libdartcv from source

Refer to dartcv

License

Apache-2.0 License