Improved image watermarking using pixel averaging and unbiased retrieval
Conference proceedings article
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Author list: Pramoun T., Amornraksa T.
Publisher: Hindawi
Publication year: 2009
Start page: 1142
End page: 1147
Number of pages: 6
ISBN: 9781424445219
ISSN: 0146-9428
eISSN: 1745-4557
Languages: English-Great Britain (EN-GB)
Abstract
Digital watermarking based on pixels modification for color image [8] is considered in this paper. Its operations are described and its performance is investigated. Based on our observations, a method based on pixel averaging and unbiased watermark retrieval is proposed in order to improve the efficiency of the considering watermarking method. Particularly, we first apply the pixel averaging technique to create the localized luminance component, and used it to fine tune the watermark signal strength. We then remove some biased watermarked pixels in the watermark retrieval process to increase accuracy of the recovered watermark. The experimental results show the watermark retrieval improvements in term of NC, compared to the previous watermarking methods in [8] and [9]. The robustness against different types of attack at various strengths is also evaluated and compared. ฉ2009 IEEE.
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