Carlos Hernández George Vogiatzis Gabriel J. Brostow Björn Stenger Roberto Cipolla Non-rigid Photometric Stereo with Colored Lights. 1-8 2007 ICCV http://dx.doi.org/10.1109/ICCV.2007.4408939 conf/iccv/2007 db/conf/iccv/iccv2007.html#HernandezVBSC07