Mat.randn constructor
Implementation
factory Mat.randn(int rows, int cols, MatType type, {Scalar? mean, Scalar? std}) {
mean ??= Scalar.all(0);
std ??= Scalar.all(1);
final mat = Mat.create(rows: rows, cols: cols, type: type);
cvRun(() => cffi.RandN(mat.ref, mean!.ref, std!.ref));
return mat;
}