一种基于位平面的差值扩展可逆水印算法

A difference expansion reversible watermarking algorithm based on bit plane

为了提高算法的嵌入容量和降低失真率等问题,文章提出一种基于图像位平面图分解理论的差值扩展算法,该算法只针对图像较低层的位平面图进行信息嵌入,不改变图像的其他较高位平面的像素值,通过这样的操作,在减小图像失真的同时,提高了总的信息隐藏量。

In order to improve the algorithm＇s embedding capacity and reduce distortion rate, a differ- ence expansion reversible watermarking algorithm is proposed by using the decomposition theory of bit plane of the image. In this algorithm, the information is only embedded at the lower level planes, and the image pixels of the other level planes are not changed, so that larger information embedding capac- ity is achieved with less distortion of the image.