| 基于多尺度小波分解的自适应图象水印算法 |
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| 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 |
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| 作者姓名： | 强英 王颖 |
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| 作者单位： | 中国科学技术大学研究生院,北京,100039;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 |
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| 基金项目： | 国家863高技术研究发展计划项目(编号:2003AA144081) |
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| 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。
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| 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 |
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| 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 |
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| Authors: | Qiang Ying Wang Ying |
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| Affiliation: | Qiang Ying 1 Wang Ying 1,21 |
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| 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. |
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| 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！ |
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