Takashi Machida Haruo Takemura Naokazu Yokoya Dense Estimation of Surface Reflectance Properties Based on Inverse Global Illumination Rendering. 895-898 2004 conf/icpr/2004 ICPR (2) https://doi.org/10.1109/ICPR.2004.1334403 https://doi.ieeecomputersociety.org/10.1109/ICPR.2004.1334403 db/conf/icpr/icpr2004-2.html#MachidaTY04