Masahito Ito

Video retrieval method using shotID for copyright protection systems

In this paper, we define a shot-identifier (we called this shotID) which easily represents characteristics of each shot. The shotID is calculated from positional and color information. And we propose a video retrieval method using the shotID. The proposed method is robust to compression, format conversion, frame dropping and noise such as watermark and so on. Furthermore, we realize a copyright protection system for digital video with watermarking technique using ideas from spread spectrum communications based on our retrieval method.

A metadata-based environment adaptive review system for digital broadcasting

In this paper, we propose the broadcasting data structure that can clip the requested scene or information in the TV program, and that can reconstitute the TV program depending on the review environment or the purpose. As a result, this mechanism enables users to use the clipped broadcasting contents for various purposes.

E-Ticket Issuing System with 3-D Pattern Recognition for Mobile Terminals

The electronic ticket issuing system for cellular phones is described in this paper. The system has strong security for commercial use and has flexibility to support any cellular phone and PDA. A cellular phone needs no adding hardware module. A user can deal with everything related with a ticket such as issue, payment and showing with his cellular phone. A user accesses to the ticket issuing server to get a ticket and shows that ticket holding his cellular phone to the ticket reader at an entrance gate. 3-D pattern is used in order to show a ticket, and its recognition is free from tilt, rotation and moving of a cellular phone during reading. This electronic ticket issuing system can be used for concert ticket, train ticket, etc. This system allows reentrance, and still more, this ticket can be used as a coupon ticket that is used any number of times.