idct function
IDCT calculates the inverse Discrete Cosine Transform of a 1D or 2D array.
For further details, please see: https://docs.opencv.org/master/d2/de8/group__core__array.html#ga77b168d84e564c50228b69730a227ef2
Implementation
Mat idct(
InputArray src, {
OutputArray? dst,
int flags = 0,
}) {
dst ??= Mat.empty();
cvRun(() => ccore.cv_idct(src.ref, dst!.ref, flags, ffi.nullptr));
return dst;
}