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| Survey on Watermarking Against Geometric Attack |
| Liu Jiu-fen①; Huang Da-ren②; Huang Ji-wu② |
| ①Dept of Information Research PLA Information Eng. Univ., Zhengzhou 45002 China;②Dept of Electronics and Communication Eng. Zhongshan Univ., Guangzhou 510275 China |
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Abstract Robustness is the key issue of digital watermarking technology. Up to now, various watermarking algorithms are proposed with much emphasis on the "robustness". However, the "robustness" claimed in most of algorithms is only against common signal processing operations such as compression and signal filtering. It is now clear that even very small geometric distortions can prevent the detection of a watermark. In this paper the current methods against geometric attacks are analyzed and summarized, and some probable development directions of digital watermarking at next stage axe introduced which are the key issues to improve and design watermarking algorithms.
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Received: 09 October 2003
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2004, Vol. 26 
