Maxime Lhuillier Long Quan Harry Shum Hung-Tat Tsui 785-790 2001 conf/cvpr/2001 CVPR (1) http://doi.ieeecomputersociety.org/10.1109/CVPR.2001.990557 db/conf/cvpr/cvpr2001-1.html#LhuillierQST01