一种基于Arnold置乱和DCT编码的无载体信息隐藏方法北大核心CSCD

近年来十分火热的搜索映射式无载体信息隐藏虽具有一定的鲁棒性,但其隐藏容量较低、传输负载大且算法复杂度高。针对以上问题,该文章提出一种基于Arnold置乱和离散余弦变换(discrete cosine transform,DCT)编码的无载体信息隐藏方法。该算法先对图片进行Arnold置乱,再对DCT后的低频系数进行编码,接着更换置乱参数来构建索引表。选择索引表中与秘密信息相同的编码值所对应的参数构建候选队列,最后筛选出鲁棒性强的参数作为密钥发送给接收方。实验结果表明,该方法与现有方法相比大大提高了嵌入容量,拥有更强的抗JPEG压缩性能。并且减少了传输负载,算法简捷,具有较强的应用价值。

A carrier free information hiding method based on Arnold scrambling and DCT cod ing

In recent years,search mapping carrier free information hiding is very popular.Al though it has certain robustness,it has low hiding capacity,large transmission load and high algorithm complexity.To solve the above problems,this paper proposes a carrier free inform ation hiding method based on Arnold scrambling and discrete cosine transform (DCT) coding.The algorithm first completes Arnold scrambling of the pictures,then encodes the low-frequency coefficients afte r DCT,and then changes the scrambling parameters to build the index table.The algorithm selects the parameter s corresponding to the same coding value as the secret information in the index table to build a ca ndidate queue,and finally filters out the parameters with strong robustness and send them to the re ceiver as a key. Experimental results show that compared with the existing methods,this method g reatly improves the embedding capacity and has stronger anti JPEG compression performance.The algor ithm reduces transmission load,is simple and has strong application value.