一种基于JPEG2000标准的数字图像加密算法  

An Algorithm for Image Encryption Based on JPEG2000

作　　者：平亮[1] 孙军[1] 周军[1] 

机构地区：[1]上海交通大学图像通信与信息处理研究所,上海200030

出　　处：《电视技术》2006年第7期87-90,共4页Video Engineering

摘　　要：针对最新的图像压缩标准JPEG2000,提出了一种在JPEG2000压缩过程中实时对小波系数进行加密的方法。在具体算法上采用本文提出的小波置乱(简称为OCWF)方法并结合符号加密来实现对小波系数的实时加密。实验结果表明,该方法具有加密效果好、加密开销少、对压缩性能影响小等优点,且完全适合高压缩率的有损压缩,可以满足版权保护等应用场合的需要。According to the latest image compression standard JPEG2000, this paper proposes a new real-time encryption method which can encrypt wavelet coefficients during the process of encoding. The algorithm is based on a new wavelet confusion method called OCWF and combination with sign encryption. Experimental results show that this encryption method has good effect, low cost and small impact on compression capability, and is totally suitable for situations needing high compression ratio. The method meets the needs in some useful situations such as copyright protection.

关 键 词：JPEG2000标准 小波系数 加密 版权保护 

分 类 号：TN918.74[电子电信—通信与信息系统]