摘要
介绍了在DSP基础上,实现数字图像的混沌加密及硬件实现方法。根据离散化和数字化处理技术,对三维Lorenz混沌系统作离散化处理,用C语言和DSP技术产生三维Lorenz混沌迭代序列,分别对数字图像的红、绿、蓝三基色信号进行混沌加密和解密。基于芯片型号为TMS320VC5509A的DSP开发平台,以bmp格式的灰度图像为例,设计了Lorenz混沌序列对数字图像进行加密与解密算法,给出了DSP硬件实现结果表明,改善了安全性、提高了速度、满足了实时性要求。
A novel method for realizing chaotic digital image encryption and its hardware implementation based on DSP is presented.By the discrete and digital process technology,the three-dimensional Lorenz chaotic system is made discrete and Lorenz chaotic iteration sequence is generated by using Hardware Description Language C and DSP technology.Red,green,and blue tricolor signals of the image are encrypted and decrypted,respectively.On the basis of the DSP exploitation platform with TMS320VC5509A chip,a gray image with an BMP format is taken as an example.The digital image encryption and decryption algorithm using Lorenz chaotic sequence is designed,and DSP hardware implementation result is given.
出处
《电子科技》
2011年第3期1-5,共5页
Electronic Science and Technology
基金
广东省"211工程"基金资助项目(粤发改[431])
