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http://dx.doi.org/10.6109/jkiice.2007.11.10.1828

Color Images Watermarking Based on Wavelet Transform  

Piao, Yong-Ri (부경대학교 전자컴퓨터정보통신공학부)
Kim, Seok-Tae (부경대학교 전자컴퓨터정보통신공학부)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.11, no.10, 2007 , pp. 1828-1834 More about this Journal
Abstract
This study proposes a new digital watermarking technique based on wavelet transformation on color image. First the $YC_bC_r$ coordinates obtain from RGB color space. then, the correlation of watermark is decreased by Arnold transformation. Next, watermark which has been enlarged by Linear Bit-expansion is inserted at a given intensity in Color images' low frequency sub-bands. When detecting the presence of watermark, F-norm function is applied. As a result of the various experiments on color images, the proposed watermarking technique has outstanding quality in regards to fidelity and robustness.
Keywords
$YC_bC_r$; Arnold; Wavelet; Linear Bit-expansion; F norm Function;
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