How to separate curved area from a grayscale image

How to separate or segment a curved area from the image.

[Image Analyst]

Usually people give us an image to look at when they ask for image processing advice. Perhaps thresholding will do it - I have no idea.

[Josephine]

This is the image. I would like to segment the lower curved boundaries and leave the rest portion.

Answer 1

[Image Analyst]

There is nothing in MATLAB to do that, at least not a built in function to do the whole process. You could try imfindcircles() but I doubt that will help. You'll have to create an algorithm from lower level functions. You can search visionbib for papers that might help.