Ching-Te Wang Tung-Shou Chen Shao-Hau He Detecting and restoring the tampered images based on iteration-free fractal compression. 131-140 2003 67 Journal of Systems and Software 2 http://dx.doi.org/10.1016/S0164-1212(02)00094-8 db/journals/jss/jss67.html#WangCH03