I am learning to implement Hough transform and I have this example program from OpenCV documentation. It contains the following two lines of code:
Canny(src,dst,50,200,3);
cvtColor(dst,cdst, CV_GRAY2BGR);
I tried displaying both dst and cdst. Both these images look the same. So, I wonder why cvtColor is applied? Is cdst created for the sole purpose of displaying lines detected in dst?