Low-Cost and Easily Constructed Large Format Display System HKUST TR-CS-01-02

Computer graphics and high-resolution digital imagery are becoming increasingly pervasive in communities not traditionally associated with graphics. Commodity graphics cards and digital cameras, along with powerful software allow organizations such as libraries, museums, and small businesses to produce expressive and realistic computer generated imagery, far surpassing the capabilities of current desktop monitors. What remains elusive to these groups is access to affordable and easy to use large format display technology. We present a practical system for deploying flexible projectorbased tiled displays. Our framework integrates robust selfcalibrating real-time geometric correction with recent advances in PC-cluster distributed rendering to provide an entirely commoditybased display system that is simple to deploy and operate. The display geometry is easy to configure and reconfigure, accommodates casually tiled projectors and arbitrary display surfaces, and can be operational in a matter of minutes. In addition, the display is transparent to existing OpenGL applications, requiring no custom APIs or re-compilation of existing OpenGL executables. In short, we present a practical and relatively inexpensive system for building flexible tiled displays.

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