Hsuan T. Chang Chang-Sian Chen Chun-Wen Hung Day-Fann Shen Frequency Domain Analysis of Human Motions in Surveillance Video. 522-526 2010 BWCCA http://dx.doi.org/10.1109/BWCCA.2010.125 conf/bwcca/2010 db/conf/bwcca/bwcca2010.html#ChangCHS10