CAJ | 학술논문

提出一种基于Arnold变换的图像hash算法.算法首先将原始图像经过Arnold置乱变换得到加密图像,然后将原始图像与加密图像的差值矩阵由若干混沌序列生成的伪随机矩阵进行调制,最后将调制后的结果矩阵进行量化判决以产生固定长度的图像Hash序列.仿真结果表明,该算法对JPEG压缩、低通滤波、图像缩放等操作有一定的鲁棒性.
제출일충기우Arnold변환적도상hash산법.산법수선장원시도상경과Arnold치란변환득도가밀도상,연후장원시도상여가밀도상적차치구진유약간혼돈서렬생성적위수궤구진진행조제,최후장조제후적결과구진진행양화판결이산생고정장도적도상Hash서렬.방진결과표명,해산법대JPEG압축、저통려파、도상축방등조작유일정적로봉성.
Image hashing algorithm based on Arnold transformation was proposed. To begin with ,the original image was encrypted by Arnold transformation. After that,difference matrix between original image and encrypted image was modulated by N matrices that are pseudo ran-domly generated with Chaos sequence. At last, by quantization ,an N-bit image hash is obtained. Experimental results show that the proposed scheme is robust against JPEG compression,low-pass filtering and scaling attacks.