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Color nonuniformity in projection-based displays: analysis and solutions
1Department of Computer Science, University of California, Irvine, CA 92697, USA. majumder@ics.uci.edu
IEEE Transactions on Visualization and Computer Graphics
|September 24, 2004
Summary
Large-area displays using multiple projectors suffer from color variations. This study introduces a camera-based calibration method to achieve uniform luminance across all pixels, enhancing display quality.
Area of Science:
- Computer Vision
- Display Technology
- Image Processing
Background:
- Multi-projector displays exhibit significant color variations.
- Luminance and chrominance characteristics are affected by projector parameters.
Purpose of the Study:
- To identify projector parameters causing color variation.
- To develop a method for luminance matching in multi-projector displays.
- To achieve photometrically uniform large-area displays.
Main Methods:
- Analysis of projector parameters influencing display color.
- Development of a camera-based calibration technique.
- Creation of a per-channel per-projector luminance attenuation map (LAM).
Main Results:
- Luminance variation is significant within and across projectors.
- Chrominance variation is relatively small, especially for same-model projectors.
- The proposed method effectively corrects luminance for photometric uniformity.
Conclusions:
- A novel method for luminance matching in multi-projector displays has been presented.
- The calibration method utilizes a camera and generates a LAM for correction.
- This is the first reported effort to achieve pixel-wise luminance matching in such displays.