imcircles to find iris region
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Hi,
I was trying to segment iris region from the images in CASIA database( the images are noise free and of good quality). However hard i try, i couldn't detect the outer circle (boundary between iris and sclera). Though i was successful in getting pupil boundary. to get pupil boundary i used
[centerspupil, radiipupil, metricpupil] = imfindcircles(A,[30 40], ...
'ObjectPolarity','dark','Sensitivity',0.92,'EdgeThreshold',0.1);
Any suggestions??
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Image Analyst
2013-7-7
You need to play around with the values of the input parameters until you get something that works. Otherwise get the average radial profile going out from the pupil centroid and figure it out from that.
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Image Analyst
2013-7-7
I suggest you first do some research on the papers where people have done it successfully. I'm sure they will have a much better algorithm than you or I could think up in a few minutes. Check out their papers here:
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
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