| 基于双树复数小波变换的特征点水印算法 |
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| 引用本文： | 王兰,吴彬,韩强雷,晋克宇.基于双树复数小波变换的特征点水印算法[J].海洋测绘,2011,31(1):39-42. |
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| 作者姓名： | 王兰 吴彬 韩强雷 晋克宇 |
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| 作者单位： | 69027部队,新疆,乌鲁木齐,830042 |
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| 摘 要： | 提出了一种基于双树复数小波变换的特征点数字水印算法。对图像做三级双树复数小波变换,用F rstner算子提取图像低频子带中的特征点,根据复数小波变换的系数特点,通过修改相应的高频系数来实现水印信息的调制嵌入,提取水印信息的同时能够近无损恢复原始载体图像。算法兼顾了水印的鲁棒性和不可见性,能够有效抵抗剪切、平移、旋转等几何攻击,对线性拉伸、低通滤波等攻击也具有一定的鲁棒性。
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| 关 键 词： | 数字水印 双树复数小波变换 Frstner特征点 |
A Feature Points Watermarking Scheme Based on Dual-tree Complex Wavelet Transform |
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| WANG Lan,WU Bin,HAN Qiang-lei,JIN Ke-yu.A Feature Points Watermarking Scheme Based on Dual-tree Complex Wavelet Transform[J].Hydrographic Surveying and Charting,2011,31(1):39-42. |
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| Authors: | WANG Lan WU Bin HAN Qiang-lei JIN Ke-yu |
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| Institution: | WANG Lan,WU Bin,HAN Qiang-lei,JIN Ke-yu(69027 Troops,Urumqi,Xinjiang,830042) |
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| Abstract: | This paper presents an image feature points watermarking scheme based on Dual-Tree Complex Wavelet Transform.It firstly calculates three Complex Wavelet Transform of the origin image,then uses Frstner operator extracting the feature points in low-frequency sub-band.According to the characteristics of complex wavelet transform coefficients,it can implement the watermark modulation embedding by modifying the corresponding high-frequency coefficients.When the watermark is extracted,the original carrier image can be near-lossless recovered at the same time.This algorithm has both robustness and invisibility,can effectively resist cropping,translation,rotation and other geometric attacks,and also has some robustness to linear stretching and low-pass filtering attacks. |
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| Keywords: | digital watermarking dual-tree complex wavelet transform Frstner feature points |
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