MATLAB: Image segmentation and blobs

Question

which is the best algorithm for segmenting natural images and finally i want to represent the objects in an image as blobs. please help me

Answer 1

The best one is the one that works for your images. Obviously there is no one single algorithm that works best for all natural images. Well, maybe not so obvious, because you asked. Eventually all images come down to blobs. You do whatever you have to do to get down to a gray level image that you can threshold into foreground and background blobs.