title: Python opencv colour change detection on certain places
body: <p>I need to detect the color change in a certain point (or line)  and it must do it live(not on a footage taken before). <a href="https://youtu.be/wi_dJrCWb54" rel="nofollow noreferrer">https://youtu.be/wi_dJrCWb54</a>   here is exactly what i want to do , i commented on the video and searched on the internet but no answer seems to come. Can any of you give an idea on how to do it or if you saw code of sth like this system can you send it to me.</p>