OpenCV Q&A Forum - RSS feedhttp://answers.opencv.org/questions/OpenCV answersenCopyright <a href="http://www.opencv.org">OpenCV foundation</a>, 2012-2018.Fri, 04 Dec 2015 03:23:06 -0600How to obtain partial derivatives of R,G,Bhttp://answers.opencv.org/question/78207/how-to-obtain-partial-derivatives-of-rgb/Hi!!! I'm trying to do an edge detector but how I do to each color band to obtain partial derivatives rx,ry, gx, gy, bx, by (for red,green,blue). With these color derivatives I must create a S matrix, where S matrix is
rx^2 + gx^2 +bx^2, rxry + gxgy + bxby,
rxry + gxgy + bxby, ry^2 + gy^2 +by^2
could you tell me what size have derivatives ? Ok, now , from S, I must calcolate the trace, the eigenvalues and the crrisponding eigenvectors. How I can do all ?
thanks you for our time and for answer me baroFri, 04 Dec 2015 03:23:06 -0600http://answers.opencv.org/question/78207/