Stefan M. Karlsson Sylvia C. Pont Jan J. Koenderink Andrew Zisserman Illuminance Flow Estimation by Regression. 304-312 2010 90 Int. J. Comput. Vis. 3 https://doi.org/10.1007/s11263-010-0353-7 db/journals/ijcv/ijcv90.html#KarlssonPKZ10