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Proceedings Paper

Improved lookup table to correct CRT adjacent pixel nonlinearity
Author(s): Stanley A. Klein; Thom Carney; Q. James Hu
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Paper Abstract

Standard 1D gamma-correcting lookup tables do not compensate for adjacent pixel spatial nonlinearities along the direction of the display raster. These nonlinearities can alter the local mean luminance and contrast of the displayed image. Five steps are described for generating a 2D lookup table (LUT) that compensates for the nonlinearity. By adjusting the 2D LUT so it takes into account the inherent blur at light to dark transitions of the display system, the usable luminance range of the LUT can be extended while reducing the ringing artifact associated with luminance compensation. Use of the blur-compensated 2D LUT incurs no additional computational effort over an uncompensated 2D LUT. Matlab programs are included that can be used to generate a 2D LUT for a user's particular display system.

Paper Details

Date Published: 20 April 1995
PDF: 10 pages
Proc. SPIE 2411, Human Vision, Visual Processing, and Digital Display VI, (20 April 1995); doi: 10.1117/12.207536
Show Author Affiliations
Stanley A. Klein, Univ. of California/Berkeley (United States)
Thom Carney, Univ. of California/Berkeley (United States)
Neurometrics Institute (United States)
Q. James Hu, Univ. of California/Berkeley (United States)


Published in SPIE Proceedings Vol. 2411:
Human Vision, Visual Processing, and Digital Display VI
Bernice E. Rogowitz; Jan P. Allebach, Editor(s)

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