Steganalysis Methodology for QIM-JPEG2000 Based on Principal Component
Zhao Yongkuan · Journal of Wuhan University · 2010
QIM-JPEG2000,the latest JPEG2000 steganography,had a way to set the constant domain to maintain the histogram of wavelet coefficients and resist the histogram-based steganalysis method.In response to this steganography,an information steganalysis methodology based on principal component analysis of DWT coefficients in JPEG2000 image was proposed.The algorithm transformed the principal component of 3rd DWT coefficients in JPEG2000 image,analyzed the difference between the statistical characteristics of the cover images and the stego images,extracted the mean,the variance,the slope,the peak,and the entropy of the principal components of wavelet coefficients as feature vectors.Then the algorithm used Support Vector Machines(SVM) to assort the cover images and the stego images.Thus the algorithm determined whether the JPEG2000 image embedded secret information or not.Experiments proved the feasibility of this method.