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From: "Sadik " <sadik.hava@gmail.com>
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Subject: Re: roi detection
Date: Tue, 22 Jan 2013 02:28:09 +0000 (UTC)
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Hi Subbmdee,

Thresholding and then checking circularity of each blob should help. 

Please see regionprops and google the definition of circularity to see how you can utilize the properties coming with regionprops.

Best.