基于几何主动轮廓的红外目标选择加密算法  

Infrared target selection encryption algorithm based on geometric active contour model

作　　者：余萍 杨强[2] 张力军 YU Ping;YANG Qiang;ZHANG Li-jun(College of Information Engineering,Yancheng Normal University,Yancheng 224002,China;Nanjing Branch,ZTE Corporation,Nanjing 210012,China;3.College of Computer,Nanjing University,Nanjing 210093,China)

机构地区：[1]盐城师范学院信息工程学院,江苏盐城224002 [2]中兴通讯股份有限公司南京分公司,江苏南京210012 [3]南京大学计算机学院,江苏南京210093

出　　处：《计算机工程与设计》2018年第4期1148-1154,共7页Computer Engineering and Design

基　　金：国家自然科学基金项目(61273106);江苏省自然科学研究基金项目(13KJB411012)

摘　　要：为解决图像选择性加密算法难以用于红外目标的安全传输的不足,提出一种基于几何主动轮廓模式与耦合映射的红外目标选择加密算法。构建几何主动轮廓模式,获取红外目标的矩形感兴趣区域;将其分割成两个尺寸均等的左、右子块,借助重力模型,对其完成置乱;设计非线性耦合混沌映射,结合调制密钥,生成随机矩阵;构建加密函数,对置乱子块完成扩散,输出加密密文;构建深度扩散函数,对初始密文进行增强。实验结果表明,与当前选择加密机制相比,所提算法能够更好地用于红外目标的加密,拥有更高的安全性与密钥敏感性。To solve the defect that current image selective encryption algorithm is difficult to be used for the safety transmission of infrared target,the infrared target selection encryption algorithm based on geometric active contour model and coupled chaotic map was proposed.The rectangle infrared target area of interest was got by defining the geometric active contour model.Left and right sub blocks with same size were segmented and gravity model was used to scramble.The nonlinear coupled chaotic map was designed to generate the random matrix based on the modulation key.The encryption function was designed to complete the pixel diffusion of left and right sub blocks,and depth diffusion mechanism was constructed to enhance the initial cipher.Experimental results show that the proposed algorithm can be better used in infrared target encryption with stronger anti attack capabi-lity compared with the current selective image encryption scheme.

关 键 词：红外图像加密 几何主动轮廓模式 非线性耦合混沌映射 矩形感兴趣区域 重力模型 深度扩散函数 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]