| 一种基于三维小波变换的视频水印算法 |
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| 引用本文： | 彭川,蒋天发. 一种基于三维小波变换的视频水印算法[J]. 武汉大学学报(工学版), 2007, 40(6): 135-138 |
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| 作者姓名： | 彭川 蒋天发 |
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| 作者单位： | 1. 中南民族大学计算中心,湖北,武汉,430074
2. 中南民族大学计算机学院,湖北,武汉,430074 |
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| 基金项目： | 中南民族大学校科研和教改项目;国家民委科研项目 |
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| 摘 要： | 提出了一种基于三维小波变换的视频水印算法.算法以二值图像作为水印,并利用三维小波变换(3D-DWT)和扩频技术,首先对水印图像进行随机置乱预处理以增强其安全性能;然后对宿主视频进行视频分割,并分别对得到的各序列作三维DWT变换;最后选取视频帧并将水印嵌入相应三维DWT系数中.实验结果表明,算法具有较好的不可见性,并且针对帧剪裁、帧丢失、帧平均和MPEG编码等具有良好的鲁棒性.
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| 关 键 词： | 视频水印 小波变换 扩频 鲁棒性 |
| 文章编号： | 1671-8844(2007)06-0135-04 |
| 修稿时间： | 2007-04-15 |
A video watermark algorithm based on 3D-DWT |
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| PENG Chuan,JIANG Tianfa. A video watermark algorithm based on 3D-DWT[J]. Engineering Journal of Wuhan University, 2007, 40(6): 135-138 |
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| Authors: | PENG Chuan JIANG Tianfa |
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| Abstract: | An effective video watermark algorithm is put forward by using the visible binary image as watermark based on three-dimensional discrete wavelet transform(DWT) and spread spectrum.The watermark image is pre-processed by using pseudorandom permutation.Firstly,the video sequence is divided into video shots.Then,watermark image is embedded into the 3D DWT coefficients considering the robustness and the invisibility by using a spread spectrum sequences.Experiment results show that the watermark frames are indistinguishable from the original frames and the algorithm is robust enough against common attacks,for example,the frame dropping,and the MPEG coding,etc. |
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| Keywords: | video watermark discrete wavelet transform spread spectrum robustness |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
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