Huiqiong Wang Stephen Lin Xiaopei Liu Sing Bing Kang Separating Reflections in Human Iris Images for Illumination Estimation. 1691-1698 2005 conf/iccv/2005 ICCV http://doi.ieeecomputersociety.org/10.1109/ICCV.2005.215 db/conf/iccv/iccv2005-2.html#WangLLK05