基于像素交换的无损信息隐藏

提出一种无损信息隐藏方法，接收端不但可以提取额外嵌入的秘密信息，而且可以无损恢复原始图像。该方法利用了相邻像素变化趋势往往一致的特性，对刻划这种特性的数据进行压缩以产生冗余空间用于携带额外的秘密信息，并使用像素值互换操作将额外信息及用于图像恢复所需数据一同嵌入到载体图像中。由于该方法顾及了人眼视觉特性，仅将数据嵌入在纹理区域，因此含密图像具有较好的视觉效果。

Lossless Information Hiding Based on Pixel-Value Exchange

A novel Iossless data-hiding scheme is presented by which the original image can be restored without error after extraction of an embedded message. The proposed method utilizes a property that the change tendencies at the adjacent pixels are always same to compress losslessly the data used to denote these properties in small blcoks of pixels,and lead to a spare space for carrying the additional message. According to the characteristics of human vision sensitivity,the pixel-value exchanging operation is used to embed the secret message and the compressed data for image restoration into the texture regions of host image. The imperceptibility of the method is therefore very high.