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フルテキストURL2010010265.pdf ( 2.5MB ) 公開日 2010-10-26
タイトルStatistical-mechanical approach for multiple watermarks using spectrum spreading
作成者Senda, Kazuhiro
Kawamura, Masaki
作成者ヨミセンダ, カズヒロ
カワムラ, マサキ
作成者別表記川村, 正樹
作成者所属山口大学大学院理工学研究科(理学)
内容記述(抄録等)We formulated a Bayes optimum watermarking decoder and derived sub-optimum decoding algorithms for spread spectrum digital image watermarking. The optimum decoder can be obtained by considering the posterior probability under the Gaussian assumption for noise and attacks. The amount of calculation for the decoder is NP-hard. We, therefore, need to derive sub-optimum decoding algorithms in order to decode the watermarks. The proposed decoders are multiple watermark decoders that estimate multiple watermarks at the same time. These methods are based on the multi-stage demodulation method and the partial interference cancellation method, which are two CDMA multiuser demodulation methods. We applied them to the digital watermarking scheme. When the original image is blind, the image itself is regarded as noise. We, therefore, evaluated bit error rates both for cases when the original image is informed and blind. As a result, we found both the multi-stage watermark decoder and the partial interference cancellation decoder were effective for watermarking. The latter performed better than the former.
本文言語eng
資料タイプtext
ファイル形式application/pdf
出版者Springer
NII資料タイプ学術雑誌論文
査読の有無査読あり
ISSN0302-9743
掲載誌名Lecture Notes in Computer Science
5973
開始ページ231
終了ページ247
発行日2010-01
DOIinfo:doi/10.1007/978-3-642-14496-7_18
情報源ISBN9783642144967
関連情報URL(IsPartOf)http://www.springerlink.com/content/0302-9743/
権利関係The original publication is available at springerlink.com.
著者版/出版社版著者版
リポジトリID2010010265
地域区分山口大学
URIhttp://www.lib.yamaguchi-u.ac.jp/yunoca/handle/2010010265