randu function
RandU Generates a single uniformly-distributed random number or an array of random numbers.
For further details, please see: https://docs.opencv.org/master/d2/de8/group__core__array.html#ga1ba1026dca0807b27057ba6a49d258c0
Implementation
Mat randu(InputOutputArray dst, Scalar low, Scalar high) {
cvRun(() => ccore.cv_randu(dst.ref, low.ref, high.ref, ffi.nullptr));
return dst;
}