摘要
为了提高重点区域的监控安全性,改善图像整体加密速度慢的缺陷,立足于图像局部加密的快速处理方法设计,提出了基于图像感兴趣区域(region of interest,ROI)加密的概念。通过OSTU算法对红外图像进行ROI提取来确定加密区域;然后对Lorenz混沌序列进行数据处理确保序列的随机性,并利用处理后的Lorenz混沌序列对红外图像的ROI进行加密;最后与传统矩阵变换加密进行了详细的加密性能比较,并与其他3种加密算法进行了运算速度比较。实验结果表明,所提加密算法属于局部加密,与整体加密相比,其加密速度大幅提高,同时具有较高的密钥敏感性和较大的密钥空间。
In order to improve the security of monitoring system and the speed of full image encrypting,based on the fast image-block encryption method,the concept of Region of interest encryption for infrared image is advanced in this paper.The OSTU algorithm are used to extract the ROI for encryption,then a Lorenz sequence is processed in order to ensure the randomness.Based on the random Lorenz data sequence,the ROI encryption is processed.Compared to the other encryption methods,the Lorenz ROI encryption has better performance on operation speed,security and encryption effect.
作者
王聪丽
平西建
张涛
WANG Congli;PING Xijian;ZHANG Tao(Information and Communication Department,Non-Commissioned Offcer Academy of PAP,Hangzhou 310000,Zhejiang,China;Institute of Information System and Engineering,Information Engineering University,Zhengzhou 450001,Henan,China;School of Computer Science&Engineering,Changshu Institute of Technology,Changshu 215500,Jiangsu,China)
出处
《应用科学学报》
CAS
CSCD
北大核心
2022年第2期246-252,共7页
Journal of Applied Sciences
基金
国家自然科学基金(No.61602511,No.61572518)
武警士官学校创新团队科学基金资助
关键词
感兴趣区域
红外图像
加密
混沌系统
region of interest
infrared image
encryption
chaos system
