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Hello all, I need some help concerning the dark pupil detection technique. Does anybody of you know how the pupil is segmented once a dark pupil image is achieved? Is a thresholding operation used? Or does the technique make use of an edge detection technique like a hough transform to fit a circle in the image? Many thanks for the help! Sincerely yours, Sylvie Denuit -- EYE-MOVEMENT mailing list ([log in to unmask]) N.B. Replies are sent to the list, not the sender To unsubscribe, etc. see http://www.jiscmail.ac.uk/files/eye-movement/introduction.html Other queries to list owner at [log in to unmask]