摘要
高清监控视频的加密传输是一个重要的研究领域,但是随着监控图像清晰程度不断提高,现行视频加密算法的运行开支面临着严峻的考验。因此对视频传输过程中使用光学加解密的可行性进行了探索,提出了基于液晶光阀和双随机相位编码的单通道视频光学加解密技术。该技术的加解密耗时几乎为零,极大提高了视频的传输性能;同时由于光学加解密技术只用在现有视频传输链路的最前端以及末端,不涉及视频编码和传输,增强了系统可用性和通用性。利用Matlab对该方法进行了仿真计算。结果表明,加密后的各通道图像接近白噪声,通过破解的方法恢复原图像的可能性几乎为零;同时可以看到,经过该系统解密之后的图像基本能完全复原。因此该方法在高清化视频日益普及的未来有着广阔的推广价值和应用价值。
Encrypted transmission of high-definition video surveillance is an important researching area,but with the continuous improvement of the clarity of the video image,the existing video encryption algorithm is facing a severe test.Therefore,we explored the feasibility of using optical encryption and decryption for video transmission,proposed the single-channel video optical encryption technology based on liquid crystal light valve and double random phase encoding.This technology's time consuming of encryption and decryption was almost zero,which could greatly improve the performance of video transmission.Additional,due to the optical encryption technology was used only in the front end and the end of the existing video transmission link,and did not involve video coding and transmission,the availability and versatility of the system could be enhanced.At last,the method was simulated by using Matlab software.The results show that the encrypted image of each channel is close to white noise,so it is almost impossible to recover the original image.Meanwhile,after decryption,the image can be completely restored.Therefore,this method has broad promotion and application value in the growing popularity of high-definition video in the future.
出处
《应用光学》
CAS
CSCD
北大核心
2015年第3期398-402,共5页
Journal of Applied Optics
基金
国家自然科学基金资助(41301382
41301480)
武警工程大学基础研究基金资助(WJY201316)
关键词
光学加解密
液晶光阀
双随机相位编码
傅里叶变换
optical encryption and decryption
liquid crystal light valve
double random phase encoding
Fourier transform
