| 一种多重变换域大容量水印方案研究 |
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| 引用本文： | 朱春华,杨铁军.一种多重变换域大容量水印方案研究[J].计算机工程与应用,2013,49(12):80-83. |
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| 作者姓名： | 朱春华 杨铁军 |
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| 作者单位： | 河南工业大学 信息科学与工程学院，郑州 450001 |
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| 摘 要： | 提出了多重离散Chirp-Fourier变换（M-DCFT）域水印方案。把多个Chirp类水印信息分别嵌入在不同重数的DCFT域，利用DCFT域Chirp信号的聚集性进行盲检测。以PSNR作为水印容量衡量指标，推导了多重DCFT域的水印容量公式。仿真结果表明，在相同的PSNR限制下，变换域水印容量随变换重数的增大而增加，且远大于空域水印容量。提出的水印方案可以选择把水印嵌入在不同重数的DCFT域，不仅嵌入方式灵活，而且具有更高的水印安全性。
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| 关 键 词： | 离散Chirp-Fourier变换 水印 Chirp信号 |
High-capacity watermarking scheme based on multiple transform domain |
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| ZHU Chunhua,YANG Tiejun.High-capacity watermarking scheme based on multiple transform domain[J].Computer Engineering and Applications,2013,49(12):80-83. |
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| Authors: | ZHU Chunhua YANG Tiejun |
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| Affiliation: | Information Science and Engineering School, Industry University of Henan, Zhengzhou 450001, China |
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| Abstract: | A high-capacity watermarking scheme based on Multiple Discrete Chirp-Fourier Transform（M-DCFT） is proposed, which embeds the watermarks in different M-DCFT domain, and performs the watermark blind detection by the energy peak of its DCFT. The general capacity of the proposed scheme also is derived by PSNR. Experimental results show that the capacity of the proposed watermarking algorithm turns bigger with transform tuple increasing; moreover, the proposed scheme may embed several watermarks in different M-DCFT domain, so the embedding method is more flexible and the watermark security is higher. |
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| Keywords: | Discrete Chirp-Fourier Transform（DCFT） watermarking Chirp signal |
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