Manmohan Krishna Chandraker Jiamin Bai Tian-Tsong Ng Ravi Ramamoorthi On the Duality of Forward and Inverse Light Transport. 2122-2128 2011 33 IEEE Trans. Pattern Anal. Mach. Intell. 10 http://doi.ieeecomputersociety.org/10.1109/TPAMI.2011.124 db/journals/pami/pami33.html#ChandrakerBNR11