CODE EXAMPLE FOR CPP

multiply two Mat in c++ element per element

Mat A = Mat::zeros(100, 200, CV_32FC1);
Mat B = Mat::zeros(100, 200, CV_8UC3);

// Mat C = A.mul(B);

Mat Afc3, Bfc3;
Mat t[] = {A, A, A};
merge(t, 3, Afc3);

B.convertTo(Bfc3, CV_32FC3, 1/255.0);

Mat C = Afc3.mul(Bfc3);