Japanese / English


論文の言語 英語
著者 Hiroaki Ogawa, Minoru Kuribayashi, Motoi Iwata, Koichi Kise
論文名 DCT-OFDM based watermarking scheme robust against clipping, rotation, and scaling attacks
論文誌名 14th International Workshop on Digital-forensics and Watermarking
発表番号 46
ページ数 14 pages
発表の種類 口頭発表
年月 2015年10月
要約 The digital watermark is used for copyright protection, and the methods should have the robustness against various attacks such as JPEG compression, clipping, rotation, and scaling attacks. Based on the DCT-OFDM based watermarking method presented at IWIHC2014, we propose a method enhancing the performance in this paper. There are two ideas in the proposed method. One idea is to reduce the computa- tional costs required for the synchronization recovery. The other idea is to encode watermark information by error correcting code and to decode it by maximum likelihood algorithm. As the result, our method has high robustness against the IHC evaluation criteria with less degradation of quality and less computational costs.