CAJ | 학술논문

提出了一种面向内容认证的半脆弱数字水印算法.该算法利用混沌系统的类随机性和遍历性的特点,将载体图像分成两部分,其中一部分用于提取基于图像特征的水印,另外一部分则用来嵌入提取的特征水印,水印信号嵌入到矩阵奇异值(SVD)较大的数据中.实验表明算法达到了不可见性、盲检测性等半脆弱水印的基本要求,并保证在对常见的JPEG压缩稳健的同时,能有效地区分偶然失真和恶意窜改.
제출료일충면향내용인증적반취약수자수인산법.해산법이용혼돈계통적류수궤성화편력성적특점,장재체도상분성량부분,기중일부분용우제취기우도상특정적수인,령외일부분칙용래감입제취적특정수인,수인신호감입도구진기이치(SVD)교대적수거중.실험표명산법체도료불가견성、맹검측성등반취약수인적기본요구,병보증재대상견적JPEG압축은건적동시,능유효지구분우연실진화악의찬개.
This paper presented a semi-fragile watermarking algorithm based on content authentication.This algorithm used chaotic system's characteristics of randomness and ergodicity.One part was used to extract image features which would be used watermarking, the other part was used to embed the watermarking extracted from the first part.The watermarking was embedded into matrix singular value larger data.Experimental results show that algorithm achieves basic goals of semi-fragile watermarking: imperceptibility, blind detection and so on, and it is robust to noise adding, compress and effective to differentiate occasional distortion from malicious tamper.