compute method

Scalar compute(Mat cmp)

Compute GMSD.

https://docs.opencv.org/4.x/d8/d81/classcv_1_1quality_1_1QualityGMSD.html#a4fbafa647a6fea744a1f5b632fc12c46

Implementation

Scalar compute(Mat cmp) {
  final p = calloc<cvg.Scalar>();
  cvRun(() => cffi.QualityGMSD_compute(ref, cmp.ref, p));
  return Scalar.fromPointer(p);
}