面向渐进传输的图像多功能水印算法  

Multipurpose Image Watermarking Algorithm for Progressive Transmission

作　　者：金剑秋[1] 曹帮琴[2] 王勋[1] 吴海燕[1] 杨柏林[1] 

机构地区：[1]浙江工商大学计算机与信息工程学院,浙江杭州310018 [2]信阳职业技术学院,河南信阳464000

出　　处：《系统仿真学报》2016年第7期1615-1621,1627,共8页Journal of System Simulation

基　　金：国家高技术研究发展(863计划)(2013AA0 13701);浙江省自然科学基金(y1101326)

摘　　要：多功能水印同时实现了用于版权保护的鲁棒水印和用于内容认证的半脆弱水印。它分为多段水印嵌入与单段水印嵌入,后者在不可见性上优于前者,但技术上更具挑战性。提出了一种面向图像渐进传输的单段水印嵌入的多功能水印算法,它将图像的特征子图作为水印信息,依据宿主图像局部区域的纹理强度和高亮强度,动态调整水印嵌入的强度,将水印嵌入至DCT(Discrete Cosine Transform)变换域的中低频系数,从而能在图像渐进传输的过程中快速判断版权归属和定位恶意篡改,具备自验证特性。实验表明:我们的方法在实现了版权保护的同时,也实现了篡改定位。Multipurpose watermarking, which has the property of both robust and semi-fragile watermarking, can realize two or more purposes in one algorithm, e.g. copyright protection and content authentication usually. It can be classified into multi-segment and single-segment watermark embedding. The latter is better in invisibility, but more challenging than the former. A multi-purpose image watermarking algorithm with single-segment watermark embedding for progressive transmission was proposed. It embedded a watermark abstracted from original image into middle and low-frequency coefficients of block DCT transform. In the watermark embedding process, the intensity of watermark could be dynamically adjusted according to the local texture and highlight intensity of the host image. In this way, the algorithm could fast perform copyright protection and locate spiteful tamper. The intensive experimental results show that our algorithm meets our expectation that copyright protection and locating spiteful tamper can be carried out at the same time.

关 键 词：多功能水印 渐进传输 JPEG 人类视觉系统 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]