Choon-Bo Shim Jae-Woo Chang A Spatio-Temporal Representation Scheme for Content- and Semantic-Based Video Retrieval on Moving Objects' Trajectories. 52-63 2002 conf/waim/2002 WAIM http://link.springer.de/link/service/series/0558/bibs/2419/24190052.htm db/conf/waim/waim2002.html#ShimC02