Geometric and Photometric Calibration for Multi-Projector Displays
Date Issued
2006
Date
2006
Author(s)
Liao, Shou-Chun
DOI
en-US
Abstract
In the thesis I focus on solving the geometric and photometric problems, especially the photometric problem, when building a seamless large display by tiling multiple projectors. Previous work related to photometric calibration mainly addresses either color gamut matching, or luminance balancing while the chrominance variation problem was ignored. Here, a two-phase approach for
photometric calibration is proposed to achieve not only chrominance consistency but also perceptual luminance uniformity across the multi-projector display. In the first phase, we present an approach similar to Stone's work on color gamut matching. Different to Stone's work is that we derive the color gamut of the display based on preserving the maximum luminance for each projector. Afterward,
the second phase eliminates the variance in luminance by using a perceptual method proposed by Majumder and Stevens. However, our method is more efficient because it only needs to generate one luminance attenuation map, rather than deals with each channel separately. The experimental results show that our work successfully deals with both color matching and luminance balancing with high display quality. Even though the tiled display is composed of
projectors of different models, our method can also achieve a seamless result. Our method has great potential for many
applications that require large and high-resolution displays, such as scientific visualizations and visual display walls.
Subjects
多台投影機接合顯示器
幾何校正
色彩校正
色度計
旋轉式可變焦攝影機
Multi-Projector Displays
Geometric Calibration
Photometric Calibration
Colorimeter
Pan-Tilt-Zoom Camera
High Dynamic Range Image
Type
thesis