摘要
基于图像特征点检测的第2代数字水印算法具有良好的抗几何攻击能力.Harris算子是2代水印中使用较多的一种特征点检测方法.然而传统Harris算子提取的特征点对于较大尺度缩放攻击的稳定性较差,结合自适应尺度特性的Harris-Laplace算子在一定程度上克服了这一缺点,并且对于旋转,噪声及压缩攻击均具有较好鲁棒性.据此给出了一种基于Harris-Laplace特征点检测的数字水印算法,实验结果表明,该算法对于常规信号处理和几何攻击具有较好的鲁棒性.
The second generation digital watermarking algorithm based on image feature point detection has a good performance of robustness against geometric attacks. Harris detector is used widely in the second generation water- marking, but the traditional Harris detector is sensitive to image scaling. Harris-Laplace detector combined with scale adaption overcomes the disadvantages to some extent, besides, it has good robustnessagainst rotating, noise and compressing attack. According to this, a digital watermarking algorithm based on Harris-Laplace feature points detector is presented. The experimental results show that the proposed method is considerably robust against both geometric attacks and normal signal processing.
出处
《应用科技》
CAS
2009年第9期24-28,共5页
Applied Science and Technology
基金
国家自然科学基金资助项目(60672034)
