HIGH QUALITY GEOMETRY DISTORTION TOOL FOR USE WITH LCD AND DLP PROJECTORS
Ronny Van Belle, Bart Maximus, Philippe Vandenbogaerde, Robert M. Clodfelter · 2000
This paper describes a method of elec- tronic geometry distortion correction for fixed resolution displays enabling the use of projection systems based on LCD or DMD technology in simulation applications where curved screens surrounding a user create a virtual environment. In 1997 Barco introduced the first LCD projector with these capabilities but with no internal user interface. The use of an ex- ternal PC was required and the distorted images suffered from a few artifacts such as aliasing effects and some sharpness and color detail loss. Since then, advances in DSP technol- ogy made a lot of progress coupled with to- day's technological opportunities made it worthwhile to investigate how picture qual- ity could be further improved. The research described in this paper describes a method to improve the accu- racy of the DSP circuits as well as newly developed DSP algorithms. It also explains how a real time user interface for a geometric alignment may be implemented.