基于排序码分多址的可逆信息隐藏

Reversible data hiding based on sorted code division multiple access

为提高可逆信息隐藏嵌入容量,提出利用排序码分多址的方法嵌入秘密信息。对图像像素排序,每列进行升序排列,记录排序索引;使用码分多址复用的方法嵌入秘密信息,利用嵌入序列的正交性嵌入多层秘密信息;利用排序索引进行逆排序,得到嵌入后的图像。实验分析结果表明,嵌入容量比未排序时提高了2至8倍,消除了图像纹理复杂度对嵌入容量的影响。

Aiming at enhancing the embedded capacity of reversible data hiding,a scheme was proposed by adopting sorted code division multiple access(S-CDMA).The image was arranged in ascending order by column and the sorting index was recorded.Data embedding was based on CDMA.The orthogonal sequences guaranteed the multi-level embedding.The image was arranged by sorting index.Experimental results show that the embedded capacity is increased 2 to 8 times over unsorted.And the impact of image texture complexity on embedding capacity is eliminated.