Steganalysis methodology based on generating function for JPEG2000
一种基于母函数的JPEG2000隐写分析方法

Response to the change of the common statistic character of DWT coefficients in JPEG2000 image was unconspi-cuous, this paper proposed a information steganalysis methodology based on generating function of DWT coefficients. The algorithm extracted the principal component of low frequency patch of the 3th DWT coefficients in JPEG2000 image, and calcula-ted the generating function. According to analyzing the change of the generating function before and after embedding, extracted nine value of the generating function as an eigenvector and input it to SVM classifier. The experimental results have demonstrated the correct rate to detect the hiding message achieves more 80% above the embedding rate 30%.