How to get features from selected part of image ?

I've isolated part of a certain image. I want to identify the features in this part and then compare these characteristics with the pictures that I have isolate part of it (compare selected characteristics with new characteristics).

Answer 1

[Image Analyst]

See my image segmentation tutorial, and other image processing examples: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862

(By the way, this is the latest duplicate so I deleted your earlier duplicate and transferred my answer here)

[Isee You]

thank you very match

and i am sorry for duplicate .

but i cant find what i want there i want to know how to fetcher extraction and matching well