Print-Scan Resilient Watermarking Based on Digital Hologram and Distortion Correction
Received date: 2010-07-27
Revised date: 2011-03-02
Online published: 2011-05-25
This paper presents a novel print-scan resilient watermarking algorithm based on digital hologram and correction of distortion. A hologram of the watermark is obtained and embedded into the spectral magnitude of the host image. A PSNR threshold adapted to the texture of the host image is set to adjust the watermark strength. The rotation distortion due to the print-scan process is corrected based on discrete Fourier transform (DFT) and edge detection. The method makes use of the digital hologram characteristics, and is capable of extracting the embedded watermark from a print-scan version reliably. Compared with previous similar schemes, the proposed approach shows advantages in invisibility, robustness and embedding capacity.
HUANG Su-juan1;2, WANG Du-yao1;2, REN Yan-li2 . Print-Scan Resilient Watermarking Based on Digital Hologram and Distortion Correction[J]. Journal of Applied Sciences, 2011 , 29(3) : 281 -288 . DOI: 10.3969/j.issn.0255-8297.2011.03.011
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