Dou Zhao Ding Liu Yanxi Yang An Improved PIC Algorithm of Background Reconstruction for Detecting Moving Object. 24-28 2008 FSKD (4) http://dx.doi.org/10.1109/FSKD.2008.157 conf/fskd/2008-4 db/conf/fskd/fskd2008-4.html#ZhaoLY08