Graphics system configured to perform distortion correction

Details Graphics system configured to perform distortion correction Graphics system configured to perform distortion correction

2005-09-06

2005-09-06

Bella, Matthew C. (Department: 2676)

Computer graphics processing and selective visual display system

Computer graphics processing

Graphic manipulation

C345S581000, C345S629000, C345S001300, C345S009000, C315S370000, C348S177000, C348S745000, C382S260000, C382S275000

Reexamination Certificate

active

06940529

ABSTRACT:
A graphics system comprises pixel calculation units and a sample buffer which stores a two-dimensional field of samples. Each pixel calculation unit selects positions in the two-dimensional field at which pixel values (e.g. red, green, blue) are computed. The pixel computation positions are selected to compensate for image distortions introduced by a display device and/or display surface. Non-uniformities in a viewer's perceived intensity distribution from a display surface (e.g. hot spots, overlap brightness) are corrected by appropriately scaling pixel values prior to transmission to display devices. Two or more sets of pixel calculation units driving two or more display devices adjust their respective pixel computation centers to align the edges of two or more displayed images. Physical barriers prevent light spillage at the interface between any two of the display images. Separate pixel computation positions may be used for distinct colors to compensate for color distortions.

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Cruz-Neira, Carolina; Sandin, Daniel J.; DeFanti, Thomas A., “Surround-Screen Projection-Based Virtual Reality: The Design and Implementation of the CAVE,” Electronic Visualization Laboratory (EVL) of The University of Illinois at Chicago, 1993.

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