| 基于多尺度小波分解的自适应图象水印算法 |
| |
| 引用本文： | 强英,王颖.基于多尺度小波分解的自适应图象水印算法[J].计算机工程与应用,2004,40(7):42-45. |
| |
| 作者姓名： | 强英 王颖 |
| |
| 作者单位： | 1. 中国科学技术大学研究生院,北京,100039
2. 中国科学技术大学研究生院,北京,100039;信息安全国家重点实验室,北京,100039 |
| |
| 基金项目： | 国家863高技术研究发展计划项目(编号:2003AA144081) |
| |
| 摘 要： | 该文提出了一种多尺度小波域的自适应水印算法,水印采用有意义二值图。自适应地确定嵌入系数的阈值,根据0/1水印值对3级小波系数,由高尺度层向低尺度层,有选择地进行细节图象系数的量化。恢复不需原图,只需相关参考序列,恢复水印亦是二值图,效果直观。经攻击实验证明,对图象噪声、剪切和压缩具有一定的鲁棒性,是一种可行的水印算法。
|
| 关 键 词： | 数字水印 小波变换 尺度 量化 |
| 文章编号： | 1002-8331-(2004)07-0042-04 |
A Level-Adaptive Digital Watermarking Algorithm Based on the Wavelet Transform |
| |
| Qiang Ying,Wang Ying.A Level-Adaptive Digital Watermarking Algorithm Based on the Wavelet Transform[J].Computer Engineering and Applications,2004,40(7):42-45. |
| |
| Authors: | Qiang Ying Wang Ying |
| |
| Affiliation: | Qiang Ying 1 Wang Ying 1,21 |
| |
| Abstract: | This paper presents an approach for still image watermarking which is based on multiresolution wavelet decomposition.The watermark is2-bit image.People adaptively set the coefficients of each detail subband,select significant coefficients and quantize them from high scale level to low scale level.It need s no an original image but reference sequence to extract the watermark.The extracted watermark is also2-bit image and it's visually effective.Through the attack experiments,the algorithm is robust against the attacks of noise,crop and compression. |
| |
| Keywords: | Digital watermark Wavelet transform Resolution Quantize |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
