Hi all, I want to find the corners of a object & detect if there is a cut in the corner. So far I've tried... 1)find the contours 2)approximate the contour to find the approximate corners points 3)crop each corner image & compare it with cvMatchShapes(). But the results was not accurate & i need some guidance.Here is the sample canny output image for which i wanna detect the Cut which is CIRCLED. Also in real Image I'm getting lot of noise in the canny output so Pls suggest me how to detect this shape defect. Regards, Balaji.R