Can Two Specular Pixels Calibrate Photometric Stereo?.

Ondrej Drbohlav Mike J. Chantler Can Two Specular Pixels Calibrate Photometric Stereo?. 1850-1857 2005 conf/iccv/2005 ICCV http://doi.ieeecomputersociety.org/10.1109/ICCV.2005.53 db/conf/iccv/iccv2005-2.html#DrbohlavC05a