findContoursAsync function

Future<(Contours, Mat)> findContoursAsync(
  1. Mat src,
  2. int mode,
  3. int method
)

FindContours finds contours in a binary image.

For further details, please see: https://docs.opencv.org/4.x/d3/dc0/group__imgproc__shape.html#gadf1ad6a0b82947fa1fe3c3d497f260e0

Implementation

Future<(Contours contours, Mat hierarchy)> findContoursAsync(Mat src, int mode, int method) async {
  final hierarchy = Mat.empty();
  final v = calloc<cvg.VecVecPoint>();
  return cvRunAsync0(
    (callback) => cimgproc.cv_findContours(src.ref, hierarchy.ref, mode, method, v, callback),
    (c) {
      return c.complete((Contours.fromPointer(v), hierarchy));
    },
  );
}