Fast Watermark Synchronization Based on Complementary Templates  

作　　者：Jong-Uk Hou Sang-Keun Ji Heung-Kyu Lee 

机构地区：[1]Department of Computer Science, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea [2]Division of Web Science and Technology, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea

出　　处：《Journal of Computer and Communications》2014年第4期58-65,共8页电脑和通信（英文）

摘　　要：A recent trend of the digital watermark requires not only the robustness but also speed. To achieve these requirements, we propose a watermark synchronization scheme based on two kinds of templates. The first one is the rotation invariant template for estimating scale parameter, and the second is the scale invariant template for estimating rotation parameter. Theoretically, complementary templates greatly reduce the search space at the detection stage and achieve robustness against the RST distortion. The results report that the proposed method is useful for the water- mark detection system which requires both a real-time detection and robustness.A recent trend of the digital watermark requires not only the robustness but also speed. To achieve these requirements, we propose a watermark synchronization scheme based on two kinds of templates. The first one is the rotation invariant template for estimating scale parameter, and the second is the scale invariant template for estimating rotation parameter. Theoretically, complementary templates greatly reduce the search space at the detection stage and achieve robustness against the RST distortion. The results report that the proposed method is useful for the water- mark detection system which requires both a real-time detection and robustness.

关 键 词：Digital Image WATERMARKING TEMPLATE Matching AFFINE TRANSFORM Real-Time Detection 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]