dftAsync function
DFT performs a forward or inverse Discrete Fourier Transform (DFT) of a 1D or 2D floating-point array.
For further details, please see: https://docs.opencv.org/master/d2/de8/group__core__array.html#gadd6cf9baf2b8b704a11b5f04aaf4f39d
Implementation
Future<Mat> dftAsync(
InputArray src, {
int flags = 0,
int nonzeroRows = 0,
}) async =>
cvRunAsync((callback) => cffi.core_DFT_Async(src.ref, flags, nonzeroRows, callback), matCompleter);