彩色数字图像的小波变换和混沌序列加密  

Color Digital Image Encryption Using Wavelet Transform and Chaotic Sequence

作　　者：张定会[1] 许赛赛[1] 余日[1] 张建伟[1] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《计算机测量与控制》2011年第6期1417-1419,共3页Computer Measurement &Control

摘　　要：根据彩色数字图像的基本特点,运用数字图像加密和解密原理,将离散小波变换和离散混沌序列有机地结合起来,研究了彩色数字图像的小波变换和混沌序列的加密和解密方法;对原始图像进行加密实质是利用混沌序列对其低频小波系数进行加密,对加密图像进行解密实质是利用混沌序列对其低频小波系数进行解密;研究的彩色数字图像加解密方法,为彩色数字图像加密提供了一种有效可行的方法,不仅能够使加密彩色数字图像具有理想的加密效果,而且能够保证加密彩色数字图像足够的安全。According to the basic characteristic of color digital image, using the encrypting and decrypting theorem of digital image, organically combining discrete wavelet transform with discrete chaotic sequence, the encryption and decryption of color digital image based on wavelet transform and chaotic sequence has been studied. The encryption of original images is to use chaotic sequences to encrypt its low frequency wavelet coefficients. The decryption of encrypted images is to use chaotic sequences to decrypt its low frequency wavelet coefficients. The encryption and decryption of color digital image studied by this paper provides an effective and feasible method for color digital image en- cryption, and not only can make the encrypted color digital image have perfect encryption effect, but also can ensure its sufficient security.

关 键 词：彩色数字图像 加解密 小波变换 混沌 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]