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-  2017 

基于SURF特征区域的鲁棒水印算法
A Robust Watermarking Algorithm Using SURF Feature Regions

DOI: 10.13203/j.whugis20140508

Keywords: 遥感影像,鲁棒水印,SURF算子,特征区域,图像归一化,数据精度,
remote sensing images
,robust watermarking,SURF detector,feature regions,image normalization,data accuracy

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Abstract:

针对遥感影像的安全保护,提出了一种基于SURF特征区域的鲁棒水印算法。首先在影像中检测SURF特征点,选取鲁棒性强的点构造互不重叠的特征区域并进行归一化处理,进而对归一化的区域实施整数小波变换,根据生成的模板选取相应位置的系数,最后通过量化的方式将水印信息重复嵌入到每个特征区域内。水印的检测可直接在攻击后的影像中进行,无需校正恢复,实现了盲提取。采用边缘像素替换的策略来保证影像的数据精度,不影响遥感影像的使用。实验表明,该算法具有良好的不可见性,且对常规攻击和几何攻击均具有较强的鲁棒性,可有效保护遥感影像的安全

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