基于DCT域的自适应数字水印算法OA
Adaptive digital watermarking algorithm based on DCT domain
针对离散余弦变换（DCT）的特点,提出一种自适应水印算法.选取JPEG量化矩阵若干DCT中频系数,并求均值,比较嵌入位与均值的关系,调整嵌入位的大小实现水印自适应嵌入.利用Arnold变换对水印信息进行预处理和后续处理,降低水印信息的相关性;同时用随机控制方法选取水印嵌入图像块,用于控制随机选取块的密钥作为该算法的一个密钥,实现水印的加密处理,提高水印的安全性.实验表明,该算法在保证隐蔽性的前提下,水印提取效果较好,对旋转、剪切、JPEG、修改等…查看全部>>
Aiming at the characteristics of Discrete Cosine transformation to propose an adaptive digital watermarking algorithm was proposed,Some medium frequency DCT coefficients with JPEG matrix were selected and their mean was calculated,and after comparing the mean with the embedded coefficient,watermarking embedded adaptively was achieved by adjusting the value of embedded coefficient.The pretveatment and subsequent treatment on watermarking were conducted by Arn…查看全部>>
方春城;谭忠明;林若波;邢南亮
揭阳职业技术学院机电工程系,广东揭阳522051揭阳职业技术学院图书馆,广东揭阳522051揭阳职业技术学院机电工程系,广东揭阳522051揭阳职业技术学院实训与计算机中心,广东揭阳522051
计算机与自动化
自适应数字水印Arnold变换离散余弦变换算法
adaptivedigital watermarkingArnold transformationDiscrete Cosine transformationalgorithm
《山东理工大学学报：自然科学版》 2012 (2)
72-76,5
评论