Colloquium Speaker

Speaker: Aditi Majumder
University of North Carolina
Topic:Compensating for Color Variation Across a Multi-Projector Display
Date:Wednesday, April 11, 2001
Time:9:15 AM
Place:Gould-Simpson, Room 701

Refreshments will be served in the 7th-floor lobby of Gould-Simpson at 10:15 AM


Multiple light projectors are tiled to get "large area tiled displays". Large area tiled displays are gaining popularity for use in collaborative immersive virtual environments and scientific visualization. While recent work has addressed the issues of geometric registration, rendering architectures, and human interfaces, there has been relatively little work done on photometric/color calibration in general, and photometric non-uniformity in particular.

Photometric non-uniformities arise out of the differences in color characteristics of the projectors. As a result, the color and intensity of a large area display varies from pixel to pixel. Further, the image typically appears brighter at the regions of overlap between adjacent projectors than in other places.

In this talk, I will analyze and classify the causes of photometric non-uniformity in a tiled display. Further, I will propose methodologies for designing algorithms to achieve color and intensity uniformity across a tiled projector display.