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Statistical mechanical evaluation of a spread-spectrum watermarking model with image restoration
http://hdl.handle.net/10935/5299
http://hdl.handle.net/10935/5299dd48ec3b-01a5-47db-b8a3-1b15473a4baf
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
aa11558033v99_062132.pdf
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| アイテムタイプ | default_紀要論文 / Departmental Bulletin Paper(1) | |||||||||||
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| 公開日 | 2019-07-26 | |||||||||||
| タイトル | ||||||||||||
| タイトル | Statistical mechanical evaluation of a spread-spectrum watermarking model with image restoration | |||||||||||
| 言語 | en | |||||||||||
| 言語 | ||||||||||||
| 言語 | eng | |||||||||||
| キーワード | ||||||||||||
| 言語 | en | |||||||||||
| 主題Scheme | Other | |||||||||||
| 主題 | Image restoration | |||||||||||
| キーワード | ||||||||||||
| 言語 | en | |||||||||||
| 主題Scheme | Other | |||||||||||
| 主題 | spread-spectrum watermarking model | |||||||||||
| 資源タイプ | ||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||
| 資源タイプ | departmental bulletin paper | |||||||||||
| 著者 |
川村,正樹
× 川村,正樹× 林,華央
× 上江洌,達也× 岡田,真人 |
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| 抄録 | ||||||||||||
| 内容記述タイプ | Abstract | |||||||||||
| 内容記述 | In cases in which an original image is blind, a decoding method where both the image and the messages can be estimated simultaneously is desirable. We propose a spread spectrum watermarking model with image restoration based on Bayes estimation. We therefore need to assume some prior probabilities. The probability for estimating the messages is given by the uniform distribution, and the ones for the image are given by the infinite-range model and two-dimensional (2D) Ising model. Any attacks from unauthorized users can be represented by channel models. We can obtain the estimated messages and image by maximizing the posterior probability. We analyzed the performance of the proposed method by the replica method in the case of the infinite-range model. We first calculated the theoretical values of the bit error rate from obtained saddle-point equations and then verified them by computer simulations. For this purpose, we assumed that the image is binary and is generated from a given prior probability. We also assume that attacks can be represented by the Gaussian channel. The computer simulation retults agreed with the theoretical values. In the case of prior probability given by the 2D Ising model, in which each pixel is statically connected with four-neighbors, we evaluated the decoding performance by computer simulations, since the replica theory could not be applied. Results using the 2D Ising model showed that the proposed method with image restoration is as effective as the infinite-range model for decoding messages. We compared the performances in a case in which the image was blind and one in which it was informed. The difference between these cases was small as long as the embedding and attack rates were small. This demonstrates that the proposed method with simultaneous estimation is effective as a watermarking decoder. | |||||||||||
| 言語 | en | |||||||||||
| 内容記述 | ||||||||||||
| 内容記述タイプ | Other | |||||||||||
| 内容記述 | (C) [2019] American Physical Society (Phys. Rev. E 99, 062132 ) | |||||||||||
| 言語 | ja | |||||||||||
| 書誌情報 |
en : Physical Review E 巻 99, p. 62132, 発行日 2019-06-26 |
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| 出版者 | ||||||||||||
| 出版者 | American Physical Society | |||||||||||
| 言語 | en | |||||||||||
| ISSN | ||||||||||||
| 収録物識別子タイプ | PISSN | |||||||||||
| 収録物識別子 | 2470-0045 | |||||||||||
| 書誌レコードID | ||||||||||||
| 収録物識別子タイプ | NCID | |||||||||||
| 収録物識別子 | AA11558033 | |||||||||||
| DOI | ||||||||||||
| 関連タイプ | isVersionOf | |||||||||||
| 識別子タイプ | DOI | |||||||||||
| 関連識別子 | https://doi.org/10.1103/PhysRevE.99.062132 | |||||||||||
| 権利 | ||||||||||||
| 権利情報 | (c) [2019] American Physical Society (Phys. Rev. E 99, 062132 ) | |||||||||||
| 言語 | en | |||||||||||
| 著者版フラグ | ||||||||||||
| 出版タイプ | VoR | |||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||||
