Hello there, I want to analyze an image, and I tried many codes without achieving my goal. What I have to do, is to find some errors from a picture. The errors looks like blob, but the margins are not compact, fact that gives me the headaches. I would like to include the error into a cercle, and i tried some algorithms but none of them worked for me. Thank you in advance for your help and if I find out how to upload an image to illustrate what I mean. Regards.