opencv multi channel element access

Question

I\'m trying to learn how to use openCV\'s new c++ interface.

How do I access elements of a multi channel matrix. for example:

Mat myMat(size(3, 3), C         


        

Answer 1

You can access the underlying data array directly:

Mat myMat(size(3, 3), CV_32FC2);

myMat.ptr(y)[2*x]; // first channel
myMat.ptr(y)[2*x+1]; // second channel