关键词: 置乱变换, 信息隐藏, 像素压缩, 信息分解, 小波变换, 像素位置

Abstract: When the conventional algorithm decomposes the key information of the image, there is coding redundancy in the pixels, which leads to poor confidentiality after the information is hidden. This paper proposes an image key information hiding algorithm based on scrambling transformation, which removes image pixel redundancy through onedimensional linear prediction, obtains the prediction error, removes psychovisual redundancy through data set mapping, and converts layered images into binary images to eliminate image coding redundancy. The algorithm uses the Doppler effect to decompose the key information in the compressed image, and uses the wavelet transform to calculate the probability distribution density of the image, so as to realize the encryption of the key information of the image. The algorithm uses the scrambling transformation technology to transform the pixel position of the key information, so that they can be inserted into pixel pair and hidden in the phase component of pixel pair, so as to realize macroscopic scrambling and microscopic scrambling of image information. The experimental results show that, compared with the conventional algorithm, the fixed point ratio and the diagonal correlation coefficient of the encrypted image after hiding the key information are reduced, the difficulty of attacking the key information is improved, and the confidentiality of the key information is fully guaranteed.

Key words: scrambling transformation, information hiding, pixel compression, information decomposition, wavelet transformation, pixel position