A study on conference system with 3DCG using digital pen and dot screen

A conference system with three-dimensional computer graphics using a digital pen and a dot screen is proposed. Our digital pen reads extremely tiny dots printed on a whiteboard and it is possible to input our handwriting into computers. Three-dimensional computer graphics is projected on the screen with a projector, and handwriting in the graphics model can be perform in our system. We also discuss how to fill in texts to the models by annotation; multimedia information addition; measurement of distance and area. For example, our system is useful for medical conference with some doctors.