In this study, we focus on a technique that embeds an electronically readable watermark directly on printed materials. This technique is used in the single-dot pattern method proposed by Kaneda et al. In the existing method, we extend a media size to A4 and improve an extraction rate over 99%. In this paper, if we change the type of printer, we verified the difference of basically the same the information extraction results. We also apply this technique on paper-based document with foreground and get successful embedding and extracting information without error by using error-correcting codes.
['Kitahiro Kaneda', 'Hiroyasu Kitazawa', 'Keiichi Iwamura', 'Isao Echizen']
A Study of Equipment Dependence of a Single-Dot Pattern Method for an Information-Hiding by Applying an Error-Correcting Code