基于块参照像素的无损信息隐藏算法

提出一种具有高嵌入容量的图像无损信息隐藏算法。首先将载体图像分成互不重叠的子块,然后在每块中选定一个参照像素,并计算参照像素与块内其它像素的差。在像素差直方图移位产生冗余空间之后,机密信息就可以无损地嵌入到这些冗余空间中。该方法在机密信息提取后可完全恢复载体图像,而且提取机密信息和恢复载体图像不需要除机密信息长度之外的任何信息。实验结果表明了该算法的有效性。

Reversible Data Hiding Based on Reference Pixel of Block

This paper presented a reversible data hiding scheme with high embedding capacity.A cover image was divi-ded into a number of non-overlapping blocks.In each block,we selected a pixel as the reference pixel,and calculated pixel differences between the reference pixel and the other pixels.After pixel difference histogram was shifted to spare space,secret message could be embedded into the cover image.The proposed scheme can extract the hidden data and recover the exact original cover image with no extra information except the length of hidden data and the stego-image itself.Experiments were conducted to show the effectiveness of the proposed method.