Establishing multiplexed watermarking method using spread code and development of its decoding algorithm
Project/Area Number |
21700255
|
Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Single-year Grants |
Research Field |
Sensitivity informatics/Soft computing
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Research Institution | Yamaguchi University |
Principal Investigator |
KAWAMURA Masaki 山口大学, 大学院・理工学研究科, 准教授 (60314796)
|
Project Period (FY) |
2009 – 2012
|
Project Status |
Completed (Fiscal Year 2012)
|
Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2010: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
|
Keywords | 電子透かし / スペクトル拡散 / 復号アルゴリズム / ベイズ推定 / 情報統計 力学 / 情報統計力学 / 画像修復 / ガウス仮定 |
Research Abstract |
Our goal is to propose optimal decoding algorithms for digital watermarking. Since it is hard to obtain Bayes optimal solutions, we need to devise decoding algorithms. We studied both methods reducing interference between the watermarks and property of noises caused by attacks, and then, we proposed various algorithms and evaluated them. As a result, we found asynchronous update is better than synchronous one, and stochastic estimation is better than deterministic one.
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Report
(5 results)
Research Products
(47 results)