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PAMI
2007

Multiplexing for Optimal Lighting

8 years 10 months ago
Multiplexing for Optimal Lighting
—Imaging of objects under variable lighting directions is an important and frequent practice in computer vision, machine vision, and image-based rendering. Methods for such imaging have traditionally used only a single light source per acquired image. They may result in images that are too dark and noisy, e.g., due to the need to avoid saturation of highlights. We introduce an approach that can significantly improve the quality of such images, in which multiple light sources illuminate the object simultaneously from different directions.Theseillumination-multiplexed framesarethen computationally demultiplexed.The approachis usefulforimaging dimobjects, as well as objects having a specular reflection component. We give the optimal scheme by which lighting should be multiplexed to obtain the highest quality output, for signal-independent noise. The scheme is based on Hadamard codes. The consequences of imperfections such as stray light, saturation, and noisy illumination sources are th...
Yoav Y. Schechner, Shree K. Nayar, Peter N. Belhum
Added 27 Dec 2010
Updated 27 Dec 2010
Type Journal
Year 2007
Where PAMI
Authors Yoav Y. Schechner, Shree K. Nayar, Peter N. Belhumeur
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