Real-Time automatic calibration for omni-display in ubiquitous computing

Authors:
Dongwuk Kyoung;Yunli Lee;Eunjung Han;Keechul Jung
Affiliations:
HCI Lab., School of Media, College of Information Science, Soongsil University, Seoul, South Korea;HCI Lab., School of Media, College of Information Science, Soongsil University, Seoul, South Korea;HCI Lab., School of Media, College of Information Science, Soongsil University, Seoul, South Korea;HCI Lab., School of Media, College of Information Science, Soongsil University, Seoul, South Korea
Venue:
PSIVT'06 Proceedings of the First Pacific Rim conference on Advances in Image and Video Technology
Year:
2006

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Abstract

In recent years, projectors are undergoing a transformation as they evolve from static output devices to portable, or communication systems. However, the projection images appear distorted unless the projector is precisely aligned to the projection screen. Generally many projection-based systems are corrected for oblique projection distortion using calibration methods (e.g., warping function). Computing a warping function uses fiducials or a special pattern projected to the screen. The methods can not use automatic calibration in real-time, like when projector is moving. We introduce a new technique for a real-time automatic calibration on planar surfaces using projected corner points. Our system provides a function of correcting image during the movement of the projector. An advantage of the proposed method is the system can be easily applied to ubiquitous computing.