| 一个新的基于DCT的自适应数字水印算法 |
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| 引用本文： | 黄松,杨华千,张伟,韦鹏程. 一个新的基于DCT的自适应数字水印算法[J]. 计算机科学, 2006, 33(6): 148-149 |
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| 作者姓名： | 黄松 杨华千 张伟 韦鹏程 |
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| 作者单位： | 1. 重庆教育学院计算机与现代教育技术系,重庆400067
2. 重庆教育学院计算机与现代教育技术系,重庆400067;重庆大学计算机科学与工程学院,重庆400044 |
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| 基金项目： | 国家自然科学基金;重庆市自然科学基金;重庆市教委资助项目 |
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| 摘 要： | 本文提出了一个利用DCT系数的关系来进行水印嵌入和提取的算法。该算法利用人类视觉系统HVS的特点，通过巧妙调整DCT系数之间的相互关系来嵌入水印．从而使得图像在嵌入一个比较稳健的水印后的视觉失真尽可能最小。水印提取不需要原始图像。实验结果表明本算法的图像保真度较好，并对JPEG压缩、剪切等常见的图像处理方法具有较好的稳健性，并优于文献上的相关算法。
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| 关 键 词： | 数字水印 版权保护 DCT系数 |
A New Adaptive Watermarking Algorithm Based on DCT |
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| HUANG Song,YANG Hua-Qian,ZHANG Wei,WEI Peng-Cheng. A New Adaptive Watermarking Algorithm Based on DCT[J]. Computer Science, 2006, 33(6): 148-149 |
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| Authors: | HUANG Song YANG Hua-Qian ZHANG Wei WEI Peng-Cheng |
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| Affiliation: | Department of Computer and Modem Education Technology, Chongqing Education College, Chongqing 400067;Department of Computer Science and Engineering, Chongqing University, Chongqing 400044 |
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| Abstract: | In this paper, an adaptive watermarking algorithm using relationships between DCT coefficients is proposed. Utilizing the property of human visual system(HVS), this approach embeds a watermark by modifying the relationship of the selected DCT coefficients skillfully, thus minimizes the perceptual distortion of the original image in which a robust watermark is embedded. The algorithm recovers the watermark without any reference to the original image. Compared with other similar watermarking algorithms reported in the literature, this method can give better image quality and is more robust against JPEG compression, cropping and commonly used image processing techniques. |
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| Keywords: | Digital watermarking Copyright protection DCT coefficient |
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