| 双重认证的变换域图像半脆弱数字水印算法 |
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| 引用本文： | 陈生潭,侯振华,王虹现. 双重认证的变换域图像半脆弱数字水印算法[J]. 计算机辅助设计与图形学学报, 2005, 17(5): 1114-1119 |
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| 作者姓名： | 陈生潭 侯振华 王虹现 |
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| 作者单位： | 西安电子科技大学,机电工程学院,西安,710071;西安电子科技大学,雷达信号处理国家重点实验室,西安,710071 |
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| 基金项目： | 国家自然科学基金 ( 69975 0 15 ) |
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| 摘 要： | 提出了一种DCT域与DWT域相结合的双重认证图像半脆弱数字水印算法，定义了一个小波系数量化函数以实现水印的嵌入与提取，根据图像局部特性，该量化函数可动态地进行调整；同时设计了三个混沌密钥，结合DCT域定义水印及其嵌入位置．实验表明，该算法在保持对常见的JPEG压缩稳健的同时，能有效地区分偶然失真与恶意篡改。
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| 关 键 词： | 图像认证 半脆弱数字水印 离散小波变换 |
Dual Authentication Semi-Fragile Watermarking of Images in Transform Domain |
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| Chen Shentan,Hou Zhenhua,Wang Hongxian. Dual Authentication Semi-Fragile Watermarking of Images in Transform Domain[J]. Journal of Computer-Aided Design & Computer Graphics, 2005, 17(5): 1114-1119 |
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| Authors: | Chen Shentan Hou Zhenhua Wang Hongxian |
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| Affiliation: | Chen Shentan 1) Hou Zhenhua 1) Wang Hongxian 2) 1) |
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| Abstract: | A combination of Discrete Cosine Transform (DCT) and Discrete Wavelet Transform(DWT) domain is introduced and a quantization function is defined to quantify wavelet coefficients according to the watermarks to be embedded. The quantization function can be dynamically adjusted according to the local image characteristics. Three private chaos keys are designed to define the watermarks to be embedded and determine the position for watermarking. Experimental results show that the proposed algorithm is robust against JPEG lossy compression, and provides very good classification of intentional and incidental tampering. |
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| Keywords: | image authentication semi-fragile watermarking discrete wavelet transform (DWT) |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
