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. Author manuscript; available in PMC: 2014 Sep 8.
Published in final edited form as: IEEE Trans Pattern Anal Mach Intell. 2001 Feb;23(2):97–115. doi: 10.1109/34.908962

Fig. 2.

Fig. 2

Half circle iris mask. (x0, y0) is the iris center, r0 is the iris radius r1 is the minimum radius of the mask, and r2 is the maximum radius of the mask.