Method of image watermarking by dividing watermark into two chrominance channels
Conference proceedings article
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Author list: Thongkor K., Amornraksa T.
Publisher: Hindawi
Publication year: 2010
Start page: 498
End page: 503
Number of pages: 6
ISBN: 9781424470105
ISSN: 0146-9428
eISSN: 1745-4557
Languages: English-Great Britain (EN-GB)
Abstract
in this paper, we consider the digital watermarking based on the modulation of image pixels in YCbCr color space, and propose a method to improve its performance. Basically, we divide the watermark into two parts, and embed each part into each chrominance channel. Based on this concept, in the watermark extraction process, we can reduce the number of the watermarked pixels used in the original pixel prediction process by half. Set of experiment were carried out to verify our concept. The results show that the accuracy of the extracted watermark in term of NC is significantly improved compared to the previous methods. The improved robustness of the embedded watermark against different types of attacks at various strengths is also illustrated and compared. ฉ2010 IEEE.
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