I need help regarding circular hough transform by Peter Bone

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Paulo
Paulo 2011-8-17
I need to detect the pupil of an eye. so what i did was:
A = imread('iris.bmp'); A = double(rgb2gray(A));
and copied the example on his houghcircle.m
mgBW = edge(A); rad = 24; [y0detect,x0detect,Accumulator] = houghcircle(imgBW,rad,rad*pi); hold on; plot(x0detect(:),y0detect(:),'r-'); figure; imagesc(Accumulator);
After doing this, i think i did not able to find the pupil.

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