MATLAB: Extraction oval-like part from segmented image

Question

How to extract oval-like part in a vessel segmented image?

I want to extract the oval-like part in the middle of a segmented vessel image

image: https://copy.com/GT6n8EF82BKw)

I want to:

– compute the Distance Transform from black.

– Apply a Local Max to the Distance Transform.

– For each of those candidates, create a histogram of gradient angles. Try a 15×15 local

neighborhood, and a bin-size of 30 degrees (12 bins). Compute the standard deviation of the

histogram. the candidate with the lowest standard deviation would be the center of an aneurysm.

I have been stuck for long time,Could you please answer me or redirect my question to someone who can help.

Thank you in Advance

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If you some one know an active "Image Processing using MATLAB" groups, please add me

Answer 1

Please define, outline, or somehow indicate the "oval-like part" that you'd like to extract or segment out.