| Semi-Fragile Watermarking for Copyright Protection and Image Authentication |
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| 作者姓名： | HUANGJi-feng |
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| 作者单位： | DepartmentofComputerScienceandTechnology,ShanghaiNormalUniversity,Shanghai200234,China |
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| 基金项目： | SupportedbytheScienceFundationofShanghaiMunicipalEducationCommission(03DZ13) |
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| 摘 要： | In this paper, we propose a semi-fragile watermarking technology for copyright protection and image authentication. We transform the image into wavelet domain and group the four adjacent wavelet coefficients. Utilizing the characteristics of tile human visual system, we embed a digital signal into the average of the four adjacent wavelet coefficients since the mean has better ,stability than single wavelet coefficient. This method needn‘t original image when extracts the watermark. Experimental results show the effectiveness of this method which is robust to common image process and fragile to malicious attack.
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| 关 键 词： | 半脆性水印 版权保护 图像识别 小波变换 图像处理 数字水印 |
| 收稿时间： | 30 May 2004 |
Semi-fragile watermarking for copyright protection and image authentication |
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| HUANGJi-feng.Semi-Fragile Watermarking for Copyright Protection and Image Authentication[J].Wuhan University Journal of Natural Sciences,2005,10(1):284-288. |
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| Authors: | Huang Ji-feng |
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| Institution: | (1) Department of Computer Science and Technology, Shanghai Normal University, 200234 Shanghai, China |
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| Abstract: | In this paper, we propose a semi-fragile watermarking technology for copyright protection and image authentication. We transform the image into wavelet domain and group the four adjacent wavelet coefficients. Utilizing the characteristics of the human visual system, we embed a digital signal into the average of the four adjacent wavelet coefficients since the mean has better stability than single wavelet coefficient. This method needn't original image when extracts the watermark. Experimental results show the effectiveness of this method which is robust to common image process and fragile to malicious attack. |
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| Keywords: | semi-fragile watermark image authentication copyright protection wavelet transform |
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