George Paschos Ivan Radev Nagarajan Prabakar Image Content-Based Retrieval Using Chromaticity Moments. 1069-1072 2003 15 IEEE Trans. Knowl. Data Eng. 5 http://doi.ieeecomputersociety.org/10.1109/TKDE.2003.1232264 db/journals/tkde/tkde15.html#PaschosRP03