An asymmetric image watermarking scheme resistant against geometrical distortions |
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| Affiliation: | 1. Department of Computer Science, National Pingtung University of Education, Pingtung 900, Taiwan;2. Department of Computer Science, National Tsing-Hua University, Hsinchu 300, Taiwan;3. Department of Information Management, Central Police University, Taoyuan 333, Taiwan;1. Department of Electrical Engineering, National Chung Hsing University, Taichung, Taiwan, ROC;2. Department of Electronic Engineering, Chien Kuo Technology University, Changhua, Taiwan, ROC;1. School of Computer Engineering, Nanyang Technological University, Singapore;2. Institute for Infocomm Research, Singapore;3. University of Applied Sciences, HEIG-VD, Yverdon-les-Bains, Switzerland;1. Université de Lyon, CNRS, INSA-Lyon, LIRIS, UMR5205, F-69621, France;2. Université de Lyon, CNRS, Université Lyon 1, LIRIS, UMR5205, F-69622, France;1. Department of Computer Engineering, Alzahra University, Tehran, Iran;2. Department of Computer Engineering, Islamic Azad Uviversity, Qazvin Branch, Qazvin, Iran |
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| Abstract: | In this paper, a novel asymmetric public-key watermarking scheme for static images is proposed. The watermark is embedded with the use of a private key, while the decoding uses only a simple public key. The asymmetric watermark carries certain number of bits of information. However, neither the knowledge of the public key, nor the knowledge of the hidden information, allows the attacker to remove the watermark. That information can be read from an attacked image, in particular from a geometrically transformed image. Moreover, the proposed watermark could be used as a synchronization template for another private-key watermark. |
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