关键词: 混沌序列, 图像加密, 图像融合, 分段线性混沌映射

Abstract: To ensure the security and robustness of hiding image information under the conditions of visibility, a digital image hiding method based on a chaotic system with variable parameters was proposed. Firstly, with the pseudo-random sequences generated by the chaos system, a hiding image was encrypted. Secondly, the one-dimensional vector which transformed from the template image was divided into a number of equal parts according to the size of the hiding image, and each part corresponding to each pixel of the hiding image. Finally, with the new chaotic sequences and digital image blending technique, the pixel of hiding image was blended into a position of the part. This digital image hiding technique improves the imperceptibility and security of hiding image. Simulation results show that the proposed technique has good imperceptibility and high robustness.

Key words: chaos sequence, image encryption, image blending, Piecewise Linear Chaotic Map （PLCM）