PixelFlex is a multi-projector display system that combines multiple roughly aligned projectors into a unified high-resolution display. It includes an automated camera-based calibration process and two rendering algorithms that support interactive applications. The first rendering algorithm is a one-pass technique that assumes little or no optical projector distortions. It corrects for the linear shear distortions (keystoning) that result from casual projector alignment and non-orthonormal projection. The second rendering algorithm is a two-pass technique that corrects for both linear projection distortions and non-linear distortions introduced by non-planar display surfaces and projector lens distortion.
Ruigang Yang, David Gotz, Justin Hensley, Herman Towles, Michael S. Brown. PixelFlex: A Reconfigurable Multi-Projector Display System. IEEE Visualization, San Diego, CA (2001).
David Gotz. The Design and Implementation of PixelFlex: A Reconfigurable Multi-Projector Display System. UNC-CS Technical Report TR01-025 (2001).
David Gotz. Design Considerations for a Multi-Projector Display Rendering Cluster. University of North Carolina at Chapel Hill Department of Computer Science Integrative Paper (2001).