Antonio Robles-Kelly Edwin R. Hancock Estimating the Surface Radiance Function from Single Images. 494-501 2004 conf/3dpvt/2004 3DPVT http://doi.ieeecomputersociety.org/10.1109/TDPVT.2004.1335278 db/conf/3dpvt/3dpvt2004.html#Robles-KellyH04