摘要
提出一种采用混沌权值变异的Huffman树的图像加密算法.此算法在熵编码过程中,以基本的Huffman树为标准,利用双耦合混沌序列1对DC系数进行树的结构未变异、路径值变异的加密;再利用双耦合混沌序列2对AC系数进行码字序号的加密.论文对算法进行了仿真,并对安全性、计算复杂度、压缩比性能进行了分析.实验结果表明,该算法基本上不影响压缩效率,且计算复杂度低、安全性高和实时性好,可用于网络上的图像服务.
Using chaos-based weight variation of Huffman tree,an image/video encryption algorithm is proposed in this paper.In the process of the entropy coding,DC coefficients are encrypted by the weight variation of Huffman tree with the double Logistic chaos and AC coefficients are encrypted by the indexes of codeword.The security,complexity and compression ration of the algorithm are analyzed.Simulation results show that this algorithm has no impact on the compression efficiency and has low complexity、high security and good real-time property.Therefore,it is suitable for real-time image on the network.
出处
《小型微型计算机系统》
CSCD
北大核心
2011年第12期2439-2443,共5页
Journal of Chinese Computer Systems
基金
国家自然科学基金项目(61001004)资助
湖南省教育厅青年项目(11B002)资助
