一种基于二维离散小波变换的视频水印嵌入和盲提取算法  

A Video Watermarking Embedding and Blind Extraction Algorithm Based on Two-Dimensional DWT

作　　者：白林雪[1] 宗良[2] 

机构地区：[1]上海电力学院学报编辑部,上海200090 [2]上海理工大学图书馆,200093

出　　处：《中国科技信息》2011年第10期99-99,104,共2页China Science and Technology Information

基　　金：上海市优秀青年教师(编号sjq08019)的支持

摘　　要：视频数字水印技术是当前水印研究中的一个热点。本文提出一种视频数字水印新算法,算法首先使用混沌序列对待嵌入水印信号进行混沌调制,然后对视频数据流中每帧图像进行2D-DWT后的低频小波系数进行操作,根据奇偶量化的特性,将水印信息嵌入到小波变换后的视频流中。所提出的水印算法简单、有效,实现了水印的盲提取,与嵌入水印前的原视频图像相比,嵌入水印后的视频图像信噪比损失很小。Digital watermarking technology of video image is a hot topic in present watermarking researching area.In this paper,a new watermarking algorithm for video images is proposed.Firstly,the binary watermark image scrambled by chaotic sequence.Then,by taking full advantage of the characteristics of the odd-even quantification,we embed watermarking information into the lowest coefficient.Moreover,watermark can be extracted blindly without original images.Compared with that of image reconstructed from watermarked video sequences,PSNRs of watermarked frames are reduced slightly.

关 键 词：视频水印 奇偶量化 二维离散小波变换(2D-DWT) 盲水印 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]