一种鲁棒的自适应空间域隐藏算法

提出了一种新的图像空域信息隐藏算法，算法利用广义Arnold猫映射，将待隐藏的二进制比特序列的每一个比特的嵌入位置，随机置乱到整个载体图像的像素空间,再用Logistic混沌映射并结合像素点最高非0位，采用自适应策略,将待嵌入的比特随机嵌入到像素点的某一个不会明显影响视觉感知效果的比特位,提取水印只需要密钥,且密钥空间大。算法采用了纠错码进行纠错来抵御噪声攻击，还采用最小像素改变量的优化策略减少视觉感知上的变化。实验结果表明，本算法信息隐藏量大，视觉不可感知性好,对剪切攻击和椒盐噪声攻击有很好的鲁棒性。

Robust adaptive information hiding algorithm based on image spatial domain

A robust information hiding algorithm of image spatial domain blind watermarking was presented. Embedding place of every bit of Binary sequences that will be hidden was scrambled randomly to the pixel space of entire image by making use of general Arnold mapping, and then a bit will be embedded a place of the pixel point which has no effect apparently on vision feeling result through applying adaptive policies of combining Logistic chaotic mapping with the position of the highest non-zero bit of a pixel. Withdrawing watermark needs only key and there is huge key space. Error-correcting codes were adopted against noise attacks, and still optimal policies of the minimal pixel change degree were applied to decrease vision feeling changes. Experimental result shows that this algorithm can have large amounts of hidden information, good invisible characters and robustness against attacks, such as cut, and salt and pepper noise.