使用python opencv进行图像边界检测

Question

I am newbie who is trying to learn opencv-python in Ubuntu - 14.04. I want to draw the boundary around the black layer at the center of the image that we tested in our laboratory. After finding the boundary i want to perform some action on the image inside boundary. Here is the image http://prntscr.com/5qfxha

But all the documents and materials in opencv are provided only for a specific set of images. There is no specific detail of how to deal with custom images. I read every single question and as I told I am newbie i am very confused so please guide me through this. Thanks in advance.

Answer 1

findContours can do the trick, see C++ 's and Python example/tutorial.

Once you have your contours, check ConnectedComponent to find who's included in who ? (only Opencv 3)