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Digital Cage Watermarking using Human Visual System and Discrete Cosine Transform  

변성철 (광주과학기술원 기전공학과)
김종남 (한국방송공사 기술연구소)
안병하 (광주과학기술원 기전공학과)
Publication Information
Journal of KIISE:Information Networking / v.30, no.1, 2003 , pp. 17-23 More about this Journal
Abstract
In this Paper. we Propose a digital watermarking scheme for digital images based on a perceptual model, the frequency masking, texture making, and luminance masking Properties of the human visual system(HVS), which have been developed in the context of image compression. We embed two types of watermark, one is pseudo random(PN) sequences, the other is a logo image. To embed the watermarks, original images are decomposed into $8\times8$ blocks, and the discrete cosine transform(DCT) is carried out for each block. Watermarks are casted in the low frequency components of DCT coefficients. The perceptual model adjusts adaptively scaling factors embedding watermarks according to the local image properties. Experimental results show that the proposed scheme presents better results than that of non-perceptual watermarking methods for image qualify without loss of robustness.
Keywords
Human Visual System; Digital Watermarking; Discrete Cosine Transform; Spread Spectrum; Intellectual Property Rights Protection;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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