An Improved Print-Scan Resistant Watermarking Scheme

Abstract:

As an improvement of Cheng etal.’s print-and-scan (PS) digital watermarking scheme, the proposed method solves the data extraction failure problem caused by pixel displacement. We propose to embed the watermark into the middle band of DCT coefficients based on the fact that the mean of DCT coefficients (MDC) is zero before and after PS. Besides, a mapping method is designed which can distribute the change of average to the original image pixels according to the local complexity. Meanwhile, we use the JND model mentioned in Cheng et al.’s scheme to guarantee the visual quality. Extensive experiments show that the proposed scheme is effective to resist PS, and the performance of the proposed scheme is better than that of Cheng et al.’s scheme.

• Periodical: Applied Mechanics and Materials (Volume 731)
• Pages: 153-158
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.731.153
• Online since: January 2015
• Authors: Wei Guo, Wen Fa Qi
• Keywords: DCT, Image Watermarking, Print-Scan

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