An apparatus and method for steganalysis that enhances the ability to detect distortion introduced by data hiding. In embodiments of the invention, a pixel grayscale value in an image is predicted by using its neighboring grayscale values of neighboring pixels. Further, a prediction-error image is produced...http://www.google.com.tw/patents/US7783074?utm_source=gb-gplus-share專利 US7783074 - Apparatus and method for steganalysis
