| 一种基于视觉模型的DWT数字水印技术 |
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| 引用本文： | 周逢朝,檀结庆.一种基于视觉模型的DWT数字水印技术[J].合肥工业大学学报(自然科学版),2004,27(8):874-877. |
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| 作者姓名： | 周逢朝 檀结庆 |
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| 作者单位： | 合肥工业大学,计算机与信息学院,安徽,合肥,230009 |
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| 基金项目： | 国家自然科学基金资助项目(10171026)，安徽省自然科学基金资助项目(03046102) |
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| 摘 要： | 利用人类的视觉特性,文章提出一种基于离散小波变换数字水印技术。首先以随机产生的二值序列作为水印,然后将原图像做若干层小波分解,通过视觉模型计算出各小波系数相应的门限值,自适应地调整水印的嵌入强度。实验结果表明,数字水印技术对一些图像处理操作和JPEG有损压缩具有较好的鲁棒性。
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| 关 键 词： | 数字水印 视觉模型 离散小波变换 |
| 文章编号： | 1003-5060(2004)08-0874-04 |
| 修稿时间： | 2003年10月21 |
A DWT digital watermarking technique based on a visual model |
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| ZHOU Feng-chao,TAN Jie-qing.A DWT digital watermarking technique based on a visual model[J].Journal of Hefei University of Technology(Natural Science),2004,27(8):874-877. |
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| Authors: | ZHOU Feng-chao TAN Jie-qing |
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| Abstract: | A digital watermarking technique based on discrete wavelet tranform(DWT) is presented in consideration of human visual properties. First, a binary random sequence is generated as the watermark. Then the N-layer discrete wavelet decomposition of the original image is performed to transform the image into wavelet domain. The corresponding threshold value of each wavelet coefficient is obtained utilizing a visual model, thus the watermark insertion strength can be tuned adaptively. Experimental results show that the proposed technique is robust enough to some image processing operations and JPEG lossy compression. |
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| Keywords: | digital watermark visual model discrete wavelet transform |
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