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首页> 外文会议>International Symposium on Signal Processing and Information Technology >A GEOMETRIC ATTACK RESISTANT IMAGE WATERMARKING SCHEME BASED ON INVARIANT CENTROIDS
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A GEOMETRIC ATTACK RESISTANT IMAGE WATERMARKING SCHEME BASED ON INVARIANT CENTROIDS

机译：基于不变质心的几何攻击抗性图像水印方案

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A digital image watermarking scheme that uses invariant centroids to detect and correct geometric attacks is proposed. The centroids are determined by computing a convergent geometric moment of a circular region of a predetermined size. These centroids serve as reference points for a region of interest in which a binary image is embedded using a wavelet based method and a private key to enhance robustness. In the watermark retrieval phase, the geometric attacks are estimated by identifying the centroids shift and making corrections. The centroids also help to identify the likely region in which the watermark could have been embedded. A search is performed by slightly perturbing the region of interest boundary until the highest correlation of the extracted watermark to the original watermark is obtained. Computer simulation results show that the method is effective in the retrieval of watermarks after geometric attacks. It is also robust against common signal processing attacks.
机译：提出了一种使用不变质心来检测和校正几何攻击的数字图像水印方案。通过计算预定尺寸的圆形区域的会聚几何时刻来确定质心。这些质心用作利益区域的参考点，其中使用基于小波的方法和私钥嵌入二进制图像以增强鲁棒性。在水印检索阶段，通过识别质心换档和制定校正来估计几何攻击。质心也有助于识别可能嵌入水印的可能区域。通过略微扰动感兴趣的区域，直到获得对原始水印的提取水印的最高相关性来执行搜索。计算机仿真结果表明，该方法在几何攻击后检索水印中是有效的。它对常见信号处理攻击也是坚固的。

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