how to extract iris region from the eye image?

I have to extract the iris from the image of eye.Now i am having the edge detected binary image with cicular iris boundaries.How can i get the original image portion of iris which lies in between these two circles................is there any method to extract the iris region?????????????

Answer 1

[Image Analyst]

You can try imfindcircles(). If that doesn't work then you'll have to try more sophisticated, published methods in section 21.5.3 here http://iris.usc.edu/Vision-Notes/bibliography/contentspeople.html#Face%20Recognition,%20Detection,%20Tracking,%20Gesture%20Recognition,%20Fingerprints,%20Biometrics

21.5.3 Biometrics, Iris Recognition Systems
    21.5.3.1 Iris Recognition Systems, Wavelet Based
    21.5.3.2 Iris Detection, Segmentation and Localization Systems
    21.5.3.3 Iris Recognition Systems, Systems, Evaluation, Comparison, Surveys
    21.5.3.4 Retinal Identification Systems and Tecniques