基于相邻像素相似性的可逆信息隐藏算法

在基于相邻两像素差值的无损数据隐藏算法的基础上,提出基于相邻像素相似性的可逆信息隐藏算法,并进行实例验证。该算法用希尔伯特曲线扫描载体图像得到载体图像一维序列,先从第一个像素开始将序列分成不相交的包含两个像素的连续组,选择组元素相等的组嵌入信息,其它组作一定的修改以避免数据的重叠,然后从修改后序列的第二个像素开始分组进行同样的操作。该算法隐藏容量大,具有较好的视觉效果。

Reversible Information Hiding Algorithm based on the Adjacent Pixels Similarity

According to the adjacent pixels similarity, a reversible information hiding scheme is proposed, which is based on the lossless data hiding scheme of two adjacent pixels difference and proved through many examples. Hilbert curve is adopted to scan the cover image to get one dimensional sequence that is divided into a series of disjoint pixel-groups with beginning from the first pixel. Each group consists of two pixels. The groups with two equal pixels are selected to embed data whereas the pixels in other groups are modified to avoid data overlapping. And then the same operations are done with beginning from the second pixel of the modified sequence. The proposed scheme achieves high capacity and makes stego-images good visual quality.