| 用于JPEG2000图像认证的半脆弱性数字水印算法 |
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| 引用本文： | 张静,张春田. 用于JPEG2000图像认证的半脆弱性数字水印算法[J]. 电子学报, 2004, 32(1): 157-160 |
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| 作者姓名： | 张静 张春田 |
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| 作者单位： | 天津大学电子信息工程学院,天津 300072 |
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| 基金项目： | 国家自然科学基金，天津市自然科学基金 |
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| 摘 要： | 本文给出一种适用于JPEG2000图像认证的半脆弱性数字水印算法,该算法与JPEG2000编、解码器相结合,它根据JPEG2000图像压缩过程中的不变参量进行水印生成和嵌入调制,利用小波变换特性对图像篡改区域进行定位.实验表明,采用该算法实现的水印不仅具有良好的视觉透明性,而且还有较佳的篡改区域指示功能.
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| 关 键 词： | JPEG2000 图像认证 数字水印 |
| 文章编号： | 0372-2112(2004)01-0157-04 |
| 收稿时间： | 2002-04-01 |
Semi-Fragile Watermarking for JPEG2000 Image Authentication |
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| ZHANG Jing,ZHANG Chun-tian. Semi-Fragile Watermarking for JPEG2000 Image Authentication[J]. Acta Electronica Sinica, 2004, 32(1): 157-160 |
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| Authors: | ZHANG Jing ZHANG Chun-tian |
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| Affiliation: | School of Electronic Information Engineering,Tianjin University,Tianjin 300072,China |
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| Abstract: | In this paper,a semi-fragile watermarking algorithm is proposed for JPEG2000 image authentication.The algorithm is combined with the JPEG2000 image coding process.The watermark is generated and embedded based on an invariant property of DWT coefficients during the JPEG2000 compression.Once the watermarked image is tampered,the alteration regions can be located according to primary properties of the wavelet transform.The experimental results demonstrate that the watermarked image possesses good perceptual transparence,and that the proposed algorithm can detect any change to the watermarked JPEG2000 image as well as locate the tampered areas. |
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| Keywords: | JPEG2000 |
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