Markus Weber Marco Milch Karol Myszkowski Kirill Dmitriev Przemyslaw Rokita Hans-Peter Seidel Spatio-Temporal Photon Density Estimation Using Bilateral Filtering. 120-127 2004 conf/cgi/2004 Computer Graphics International https://doi.org/10.1109/CGI.2004.1309200 https://doi.ieeecomputersociety.org/10.1109/CGI.2004.1309200 db/conf/cgi/cgi2004.html#WeberMMDRS04