Mat.randu constructor
Implementation
factory Mat.randu(int rows, int cols, MatType type, {Scalar? low, Scalar? high}) {
low ??= Scalar.all(0);
high ??= Scalar.all(256);
final mat = Mat.create(rows: rows, cols: cols, type: type);
cvRun(() => cffi.RandU(mat.ref, low!.ref, high!.ref));
return mat;
}