Improvement of watermark detection ability based on blockwise image compensation for geometrical distortions
Improvement of watermark detection ability based on blockwise image compensation for geometrical distortions
复制标题
基于分块图像几何畸变补偿的水印检测能力提升
DOI：
10.1002/ecjc.20235
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
Hatsukazu Tanaka
中科院分区：
文献类型：
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作者：
Ryuji Hisanaga;M. Kuribayashi;Hatsukazu Tanaka
数字水印技术的一个重要问题是由于同步丢失而导致的抗几何失真能力的弱点。为了正确提取水印，本文提出了一种抗几何失真的图像补偿方案。我们的计划收集的特征点，在图像中，以恢复所造成的几何失真攻击的失真。这种特征点的选择，可以通过几个过滤操作获得的分区的局部最大值。在计算机模拟的基础上，我们寻找了最佳的滤波操作和插值，并对方案的有效性进行了研究。© 2006 Wiley Periodicals，Inc. Electron Comm Jpn Pt 3，89（12）：1- 9，2006;在线发表于Wiley InterScience（www.interscience.wiley.com）。DOI 10.1002/ecjc.20235
One of the important problems of watermarking techniques is the weakness against geometrical distortions because of synchronization loss. In this paper, we propose an image compensation scheme against geometrical distortions in order to extract watermarks correctly. Our scheme collects the feature points in an image so as to recover the distortions caused by geometrical distortion attacks. Such feature points are selected by the local maximal value of partitioned regions which can be obtained by several filtering operations. Based on the computer simulated results, we have searched the optimal filtering operation and interpolation, and then studied the validity of our scheme. © 2006 Wiley Periodicals, Inc. Electron Comm Jpn Pt 3, 89(12): 1– 9, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecjc.20235