Francesco Ziliani Andrea Cavallaro Image Analysis for Video Surveillance Based on Spatial Regularization of a Statistical Model-Based Change Detection. 1108 1999 conf/iciap/1999 ICIAP http://doi.ieeecomputersociety.org/10.1109/ICIAP.1999.797749 db/conf/iciap/iciap1999.html#ZilianiC99