DocumentCode
3185387
Title
Correcting luminance for obliquely-projected displays
Author
Ulichney, Robert ; Sukthankar, Rahul
Author_Institution
Hewlett-Packard Co., Cambridge, MA, USA
fYear
2005
fDate
8-12 Jan. 2005
Firstpage
367
Lastpage
368
Abstract
Projection-based products are becoming a competitive alternative for HDTV display. It is often impractical to orient a projector perpendicularly to the screen. However, oblique projection geometry is a major factor in display luminance non-uniformity. Feedback from an arbitrarily-positioned camera is used to find homography transformations between projector and screen. From this we determine the ratio of pixel areas to flatten the illumination field.
Keywords
brightness; display devices; optical projectors; video signal processing; HDTV display; display luminance nonuniformity; homography transformations; luminance correction; oblique front projection; obliquely-projected displays; pixel area ratio; Attenuation; Brightness; Cameras; Displays; Distortion measurement; Feedback; Geometry; HDTV; Lighting; Photometry;
fLanguage
English
Publisher
ieee
Conference_Titel
Consumer Electronics, 2005. ICCE. 2005 Digest of Technical Papers. International Conference on
Print_ISBN
0-7803-8838-0
Type
conf
DOI
10.1109/ICCE.2005.1429870
Filename
1429870
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