一种新的数字图像隐藏方案

给出了一种新的图像隐藏方案，与其它隐藏方案的不同之处在于：一方面隐藏了信息后的图像既包含隐藏又包含密钥信息；另一方面，此方案完全采用异或运算，隐藏信息和恢复原始信息采用不同算法；恢复后的图像是被隐藏图像自身在一定方式下的异或运算的结果，因而其运算速度较快，同时此隐藏方案具有随机性和变化的多样性。给出了实现它的迭代函数族的一般构造模式，同时也证明了恢复原图的正确性，在不失去对照度的情况下，给出了实现

A New Hiding Scheme of Digital Image

A new hiding scheme of digital image is introduced in this paper, which differs from existed methods in two ways. Firstly, the hidden image contains not only the hiding image itself but the key of recovering image also. Secondly, the scheme uses XOR operation only. Different operations are used in the image hiding and the recovering of original image. The recovered image is obtained through the performing of XOR operation only to the hiding image in certain condition, which has the features of very rapid computation speed and randomness as well as varieties for the hiding method. A general model of iterates function family to perform the scheme is given in the paper together with the proof for the algorithm correctness for recovering image. The minimum value of image expanding is also given to perform a hiding image without losing of contrast of the image. Anti distort is also discussed in this paper.