A Steganalytic Algorithm Aiming at JPEG Image

This algorithm is specially aimed at steganalytic algorithm of JPEG image and used to detect whether hidden information exists in it. According to the structural feature of JPEG image and through analyzing the DCT coefficient, the algorithm firstly extract quantification matrix, and judge whether hidden information exists in the image according to the relationship between image and the quantification matrix. This algorithm introduces an improved method of extracting quantification matrix, and raises the efficiency and accuracy of extracting quantification matrix, which makes the algorithm acquire a comparatively high accuracy rate of detecting.