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A Blind Watermarking Technique Using Difference of Approximation Coefficients in Wavelet Domain  

윤혜진 (광주과학기술원 기전공학과)
최태선 (광주과학기술원 기전공학과)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.41, no.2, 2004 , pp. 65-72 More about this Journal
Abstract
In this paper, we propose a new blind image watermarking method in wavelet domain. It is necessary to find out watermark insertion location in blind watermark. To select the watermark embedding locations, we use the increment and decrement information of the successive approximation coefficients after discrete wavelet transformed. In order to evaluate the proposed algorithm we embed watermark into test images and detect the watermark after attacks like JPEG lossy compression and performing of various liters. Experimental results show that the proposed method is robust against various kinds of attacks and still remains transparency.
Keywords
approximation coefficients; increment and decrement information; horizontal/vertical difference map;
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