filterSpecklesAsync function
        
Future<void> 
filterSpecklesAsync(
    
- InputOutputArray img,
- double newVal,
- int maxSpeckleSize,
- double maxDiff, {
- OutputArray? buf,
Filters off small noise blobs (speckles) in the disparity map.
void cv::filterSpeckles (InputOutputArray img, double newVal, int maxSpeckleSize, double maxDiff, InputOutputArray buf=noArray())
https://docs.opencv.org/4.11.0/d9/d0c/group__calib3d.html#gabe331f205a6dd7a9aa5db8a38157d25b
Implementation
Future<void> filterSpecklesAsync(
  InputOutputArray img,
  double newVal,
  int maxSpeckleSize,
  double maxDiff, {
  OutputArray? buf,
}) async {
  buf ??= Mat.empty();
  return cvRunAsync0(
    (callback) => ccalib3d.cv_filterSpeckles(img.ref, newVal, maxSpeckleSize, maxDiff, buf!.ref, callback),
    (c) => c.complete(),
  );
}