| 摘要: |
| 分析了图像在Chirp-Fourier域的能量分布，给出空域Chirp水印嵌入参数选取与Chirp-Fourier域水印检测时的处理方法。仿真结果表明，按照给出的参数嵌入水印，水印算法的透明性好，检测快，对常见的图像处理鲁棒性较强。 |
| 关键词: 图像处理 数字水印 Chirp信号 Chirp-Fourier变换 |
| DOI：10.3969/j.issn.1001-893X. |
| Received:October 31, 2005Revised:April 06, 2006 |
| 基金项目:国家自然科学基金 |
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| Energy Distribution of Image in Chirp-Fourier Domain and a Chirp Watermarking Algorithm |
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| Abstract: |
| The energy distribution of image in Chirp - Fourier domain is analysed and the method of watermark parameter choosing and detecting based on Chirp - Fourier transform is presented. The experimental results show that the proposed watermarking algorithm can make the watermark perceptual invisibility and be detected quickly, and it is also robust to some common image processing. |
| Key words: image processing watermarking chirp signal chirp - Fourier transform |
