find4QuadCornerSubpixAsync function

Future<bool> find4QuadCornerSubpixAsync(
  1. InputArray img,
  2. InputOutputArray corners,
  3. (int, int) regionSize
)

finds subpixel-accurate positions of the chessboard corners

bool cv::find4QuadCornerSubpix (InputArray img, InputOutputArray corners, Size region_size)

https://docs.opencv.org/4.11.0/d9/d0c/group__calib3d.html#gab8816c8a176e1d78893b843b3f01557a

Implementation

Future<bool> find4QuadCornerSubpixAsync(
  InputArray img,
  InputOutputArray corners,
  (int, int) regionSize,
) async {
  final prval = calloc<ffi.Bool>();
  return cvRunAsync0(
    (callback) =>
        ccalib3d.cv_find4QuadCornerSubpix(img.ref, corners.ref, regionSize.cvd.ref, prval, callback),
    (c) {
      final rval = prval.value;
      calloc.free(prval);
      return c.complete(rval);
    },
  );
}