RST transforms resistant image watermarking based on centroid and sector-shaped partition  

作　　者：ZHAO Yao NI RongRong ZHU ZhenFeng 

机构地区：[1]Institute of Information Science,Beijing Jiaotong University,Beijing 100044,China [2]Beijing Key Laboratory of Advanced Information Science and Network Technology,Beijing 100044,China

出　　处：《Science China(Information Sciences)》2012年第3期650-662,共13页中国科学（信息科学）（英文版）

基　　金：supported in part by National Basic Research Program of China (Grant No. 2011CB302204);National Science Foundation of China (Grant No. 61025013);Sino-Singapore JRP (Grant No. 2010DFA11010);Beijing Natural Science Foundation (Grant No. 4112043);Fundamental Research Funds for the Central Universities (Grant No. 2009JBZ006-3)

摘　　要：A novel digital watermarking scheme featuring centroid-based sectoring is proposed in this paper. To get higher robustness against geometric attacks, such as rotation, scaling, and translation （RST）, a delicate synchronization mechanism was developed and incorporated into the proposed approach. During the process of watermark embedding, the original image was partitioned into sectors based on the image centroid. Synchronization information as well as the message bits is then embedded into these sectors. With the help of the centroid-based sectoring and synchronization information, the proposed approach is capable of restoring the cor- rect sectoring even if it has experienced severe geometric distortion. This attribute ensures the correct recovery of embedded watermarks and contributes to the robustness of the proposed scheme. A series of experiments have been conducted to verify the feasibility and effectiveness of the proposed approach. Experimental results show that the proposed scheme possesses good robustness against RST attacks and considerable robustness against other common image processing attacks.A novel digital watermarking scheme featuring centroid-based sectoring is proposed in this paper. To get higher robustness against geometric attacks, such as rotation, scaling, and translation （RST）, a delicate synchronization mechanism was developed and incorporated into the proposed approach. During the process of watermark embedding, the original image was partitioned into sectors based on the image centroid. Synchronization information as well as the message bits is then embedded into these sectors. With the help of the centroid-based sectoring and synchronization information, the proposed approach is capable of restoring the cor- rect sectoring even if it has experienced severe geometric distortion. This attribute ensures the correct recovery of embedded watermarks and contributes to the robustness of the proposed scheme. A series of experiments have been conducted to verify the feasibility and effectiveness of the proposed approach. Experimental results show that the proposed scheme possesses good robustness against RST attacks and considerable robustness against other common image processing attacks.

关 键 词：digital watermarking geometrical transform attacks RST transforms 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术] TP391[自动化与计算机技术—计算机科学与技术]