How can i detect circle in a eye image? Mainly the iris region.

I am working on iris recognition algorithms. I want to know how can i localize the iris region in a eye image.

[Rishu Chauhan]

plz send me code if u get the answer......

[niroz gadgoud]

plz can you send me the code at [e-mail]

Answer 1

[Alex Taylor]

You should start with imfindcircles and see if that works:

http://www.mathworks.com/help/images/ref/imfindcircles.html

[Alex Taylor]

Yes, I was answering a more generic "how should I start with a circle detection problem?" question. I would also suggest looking at the literature to find specific algorithms that are well suited to iris detection.

[Umme Tania]

I tried this one.... A = imread('coins.png'); imshow(A); [centers, radii, metric] = imfindcircles(A,[15 30]); centersStrong5 = centers(1:5,:); radiiStrong5 = radii(1:5); metricStrong5 = metric(1:5); viscircles(centersStrong5, radiiStrong5,'EdgeColor','b'); But it shows the error ...Undefined function or method 'imfindcircles' for input arguments of type 'uint8'.

[Image Analyst]

Then why did you "Accept" the answer if you didn't get it to work? You must have an old version of MATLAB. Please upgrade to the latest version.

[Umme Tania]

Sorry, i am new here...i thought if i am going to comment, i need to press accept .

[Nitin]

Check out Libor Masek, MATLAB Source Code for a Biometric Identification System Based on Iris Patterns., it's a good place to start. It basically uses Canny Edge Detection followed by Hough Transform to detect the iris.

http://www.csse.uwa.edu.au/~pk/studentprojects/libor/sourcecode.html

[Umme Tania]

Thanks .........that's a huge help

[om sharma]

there is only .p files no code..... kindly send me the code

[niroz gadgoud]

plz can you send me the code at [e-mail]

Answer 2

[Image Analyst]

In your research on the extensive literature on this subject, which algorithm are you using? Show us your MATLAB code. We don't have time to research the literature for you and decide on an algorithm for you. There is lots out there on this subject and you are the one who needs to come up with the method.

Answer 3

[Syed Zain Nasir]

You should also have a look at this article Eye Ball Detection in MATLAB , they have explained in detail. I think it will help you out.

[Image Analyst]

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