CAJ | 학술논문

目前基于SVD的水印算法是直接对宿主图像或水印图像进行奇异值变换(SVD),然后将水印嵌入宿主图像的的奇异值中.本文提出了一种新的基于SVD-DWT的水印算法,先对宿主图像和水印图像进行小波变换(DWT),然后将水印嵌入各频带的奇异值中,并且水印嵌入系数随频带不同而不同.在JPEG压缩、图像旋转及剪切等攻击方式下,对该水印算法进行了鲁棒性分析,数值实验表明该水印算法具有良好的抗攻击性和安全性.
목전기우SVD적수인산법시직접대숙주도상혹수인도상진행기이치변환(SVD),연후장수인감입숙주도상적적기이치중.본문제출료일충신적기우SVD-DWT적수인산법,선대숙주도상화수인도상진행소파변환(DWT),연후장수인감입각빈대적기이치중,병차수인감입계수수빈대불동이불동.재JPEG압축、도상선전급전절등공격방식하,대해수인산법진행료로봉성분석,수치실험표명해수인산법구유량호적항공격성화안전성.
The watermarking schemes based on SVD were directly applied SVD to original images. An optimal watermarking scheme applying SVD to the subbands of cover image after applying DWT to both the cover image and watermark is presented. Experiments show that this scheme is robust to a wide range of attacks.