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http://dx.doi.org/10.6109/jkiice.2011.15.5.1073

A Robust Digital Watermarking based on Virtual Optics  

Lee, Geum-Boon (조선대학교 컴퓨터공학부)
Cho, Beom-Joon (조선대학교 컴퓨터공학부)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.15, no.5, 2011 , pp. 1073-1080 More about this Journal
Abstract
In this paper, we propose a novel digital watermarking method by virtual optics which secures multimedia information such as images, videos and sounds. To secure the multimedia data, we use Fresnel transform which describes the diffraction phenomena of the waves. Also, this method attaches the random phase function to Fresnel transform so that original image and watermark image would be gaussian random vectors. The complex numbers of watermark by Fresnel transform are separated the real part and the imaginary part. The former is embedded in original image as a encoding key imperceptibly and the latter is used for detecting the watermark as a decoding key. This method for digital watermarking ensures that watermark can be successfully registered and extracted from the watermarked image. Further, it provides the robustness to signal processing operation and geometric distortion and proves the strong resilience against cropping attack. The performance evaluation of the experiment is carried out with PSNR, and the numerical simulation results show the efficiency of the proposed method.
Keywords
virtual optics; digital watermarking; Fresnel transform; Random phase function;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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