DCT-OFDM based watermarking scheme robust against clipping, rotation, and scaling attacks
Journal
14th International Workshop on Digital-forensics and Watermarking
Presentation number
46
Number of pages
14
Reviewed
Reviewed
Presentation type
Oral
Date
October 2015
Key
Ogawa2015_TDFW (id=1483)
Abstract
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.
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