Multiple single channel matrix converted to single multi channel matrix

Question

i am working in opencv c++ api with matrices

I have 4 single channel Mat that i will like to merge into one 4 channel matrix. It is basically the rgba channels i have in

Answer 1

You can use cv::merge to do what you want. One possible usage:

cv::Mat r,g,b,a;

//Fill r,g,b,a with data

cv::Mat result;
std::vector<cv::Mat> channels;

channels.push_back(r);
channels.push_back(g);
channels.push_back(b);
channels.push_back(a);

cv::merge(channels, result);