| 小波域利用Duffing振子检测的图像水印算法 |
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| 引用本文： | 李东明,王典洪,严军.小波域利用Duffing振子检测的图像水印算法[J].计算机应用,2009,29(2):436-439. |
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| 作者姓名： | 李东明 王典洪 严军 |
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| 作者单位： | 中国地质大学,机械与电子信息学院,武汉,430074 |
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| 摘 要： | 为了提高图像Chirp类水印的鲁棒性能，提出一种利用混沌振子检测微弱水印信号的方法。将嵌入在载体低频小波域的非周期Chirp信号通过分块平滑转化为单频周期信号，然后通过Duffing振子阵列检测器检测微弱的周期信号，使水印检测问题转化为超低信噪比下，确定性微弱周期信号的检测。实验表明信噪比为－40dB时仍然能有效检测到水印的存在。
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| 关 键 词： | 数字水印 离散小波变换 Duffing 振子 Chirp 信号 微弱信号检测 |
| 收稿时间： | 2008-08-06 |
| 修稿时间： | 2008-09-12 |
A novel weak chirp typed blind watermarking detection algorithm based on wavelet and duffing oscillators |
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| LI Dong-ming,WANG Dian-hong,YAN Jun.A novel weak chirp typed blind watermarking detection algorithm based on wavelet and duffing oscillators[J].journal of Computer Applications,2009,29(2):436-439. |
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| Authors: | LI Dong-ming WANG Dian-hong YAN Jun |
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| Affiliation: | LI Dong-ming,WANG Dian-hong,YAN Jun Faculty of Mechanical , Electronic Information,China University of Geosciences,Wuhan Hubei 430074,China |
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| Abstract: | To enhance the robustness of the Chirp typed watermark,propose an algorithm based on Duffing Oscillators.First we change the Chirp signal which was embedded into the low frequency band of the host image in the wavelet domain into single frequency periodic signal,then we detect the periodic signal by the Duffing oscillators.The model of deterministic signal detection with unknown parameters is utilized to formulate the watermark detection.Experiments show that the detector perform effectively when the signal... |
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| Keywords: | digital watermarking Discrete Wavelet Transform (DWT) Duffing oscillator Chirp signal weak signal detection |
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