Xiaoqian Jiang Wanhong Xu Yiheng Li Latanya Sweeney Ralph Gross Daniel Yurovsky 2D Image Database Indexing: A Coefficient-Based Approach. 2210-2213 2007 ICME http://dx.doi.org/10.1109/ICME.2007.4285124 conf/icmcs/2007 db/conf/icmcs/icme2007.html#JiangXLSGY07