CHI '95 Conference Companion on Human Factors in Computing Systems
Visual Input for Pen-Based Computers
IEEE Transactions on Pattern Analysis and Machine Intelligence
Online Handwriting Data Acquisition Using a Video Camera
ICDAR '99 Proceedings of the Fifth International Conference on Document Analysis and Recognition
Visual panel: virtual mouse, keyboard and 3D controller with an ordinary piece of paper
Proceedings of the 2001 workshop on Perceptive user interfaces
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In this paper, we propose a system for inputting hand drawn pattern and displaying it on a hand-held planar rectangle board by utilizing two cameras and a projector which are installed above the user. In this system, the cameras and the projector are related by projective geometry. The cameras capture the user's hand-drawing motion. From the captured images, the tip of the user's pen and the corners of the board are tracked for detecting the status of pen's up/down and displaying the drawn pattern at a fixed position on the surface of the board. For demonstrating the validity of the proposed system, we show that the user can draw pattern on the board with arbitrary pose and position, while the pattern is simultaneously displayed on the board in real-time.