一种新的强鲁棒彩色图像信息隐藏算法

A new strong robustness color image information hiding algorithm

为了解决最低有效位(Least significant bit, LSB)信息隐写算法嵌入鲁棒性不高、嵌入信息量少等问题,提出了一种新的强鲁棒彩色图像信息隐藏算法。将秘密信息图像进行Logistic混沌加密和Arnold置乱,根据随机序列进行位置映射选取载体图像待嵌入像素点的位置,按照视见函数理论从上述像素点的RGB三通道共24个位平面选取出8位作为待嵌入位平面,将8位量化后的灰度水印像素点按上述已选择的位置嵌入彩色载体图像中。实验表明,本算法在保证主观视觉保真度的前提下增加了秘密信息的嵌入容量,嵌入容量约为LSB算法的2.6倍。在应对裁剪攻击、椒盐噪声攻击、涂抹攻击、尺度变换攻击时,此算法具有较好的稳健性。

In order to solve the problem of low embedding robustness and small amount of embedded in-formation in Least significant bit(LSB)algorithm,a new robust color image information hiding algorithm is proposed.The secret information image is encrypted by Logistic chaotic encryption and Arnold scramb-ling.Then the embedded pixel positions of the carrier image are selected according to the random se-quence position mapping.After that,the embedded 8 bit planes are selected from RGB channels with 24 bit planes according to the theory of visual function,and 8-bit quantized gray image pixel are embedded in the selected position,so as to achieve the gray watermarking being embedded into the color image.The experiment results show that the proposed algorithm can increase the embedding capacity and en-hance robustness while guaranteeing the subjective visual fidelity.Compared with LSB algorithm,the em-bedding capacity of this algorithm is about 2.6 times greater than that of LSB algorithm.At the same time,the algorithm has good robustness against cropping attack,salt and pepper noise attack,marking attack,as well as scale changing attack.