A high quality robust watermarking scheme

Authors:
Yu-Ting Pai;Shanq-Jang Ruan;Jürgen Götze
Affiliations:
Department of Electronic Engineering, University of Science and Technology, Taiwan, China;Department of Electronic Engineering, University of Science and Technology, Taiwan, China;University of Dortmund, Germany
Venue:
PCM'06 Proceedings of the 7th Pacific Rim conference on Advances in Multimedia Information Processing
Year:
2006

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Abstract

In recent years, digital watermarking has become a popular technique for hiding information in digital images to help protect against copyright infringement. In this paper we develop a high quality and robust watermarking algorithm that combines the advantages of block-based permutation with that of neighboring coefficient embedding. The proposed approach uses the relationship between the coefficients of neighboring blocks to hide more information into high frequency blocks without causing serious distortion to the watermarked image. In addition, an extraction method for improving robustness to mid-frequency filter attacks is proposed. Our experimental results show that the proposed approach is very effective in achieving perceptual invisibility with an increase in the peak signal to noise ratio (PSNR). Moreover, the proposed approach is robust to a variety of signal processing operations, such as compression (JPEG), image cropping, sharpening, blurring, and brightness adjustments. In those experimentation, the robustness is especially evident under the attack of blurring.