iLamps: Geometrically Aware and Self-Configuring ProjectorsAppeared in SIGGRAPH 2003
Ramesh Raskar, Jeroen van Baar, Paul Beardsley, Thomas Willwacher, Srinivas Rao, Cliff Forlines
Mitsubishi Electric Research Labs
My thoughts :
However, we believe that projectors are capable of much more. Our goal is to embed projectors as part of an infrastructure as they become mobile and networked. By exploiting elements (that will become) available in a self-contained projector such as the camera module, a tilt sensor and wireless connection, we demonstrate many other modes of operation, corresponding algorithms and potential applications.
Technical contribution include a 'Shape-adaptive' projection paradigm, a new image transfer equation for quadric transfers (e.g. for image registration on spherical or cylindrical screens) and a robust global constistency method using local computation.
Projectors are currently undergoing a transformation as they evolve from static output devices to portable, environment-aware, communicating systems. An enhanced projector can determine and respond to the geometry of the display surface, and can be used in an ad-hoc cluster to create a self-configuring display. Information display is such a prevailing part of everyday life that new and more flexible ways to present data are likely to have significant impact. This paper examines geometrical issues for enhanced projectors, relating to customized projection for different shapes of display surface, object augmentation, and co-operation between multiple units.
We introduce a new technique for adaptive projection on nonplanar surfaces using conformal texture mapping. We describe object augmentation with a hand-held projector, including interaction techniques. We describe the concept of a display created by an ad-hoc cluster of heterogeneous enhanced projectors, with a new global alignment scheme, and new parametric image transfer methods for quadric surfaces, to make a seamless projection. The work is illustrated by several prototypes and applications.
iLamp refers to intelligent Locale-Aware Mobile ProjectorLink to PPT presentation Source code to find Largest Inscribed Rectangle
2004 paper, RFIG Lamps, on using handheld projectors with wireless
tags (like RFID)
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