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Proceedings Paper

Mobile system for measuring retroreflectance of traffic signs
Author(s): John J. Lumia
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Paper Abstract

There is a serious need for a practical system to evaluate the nighttime visibility of existing traffic signs and provide data for making decisions on sign replacement. A mobile system has been developed which can measure the average retroreflectance of sign legend and background from a moving vehicle during daylight hours. This system uses a video camera to acquire sign images a xenon flash as a source of light a personal computer to analyze the sign images and a laser rangefinder to measure the distance to the sign.

Paper Details

Date Published: 1 March 1991
PDF: 12 pages
Proc. SPIE 1385, Optics, Illumination, and Image Sensing for Machine Vision V, (1 March 1991); doi: 10.1117/12.25344
Show Author Affiliations
John J. Lumia, EKTRON Applied Imaging (United States)

Published in SPIE Proceedings Vol. 1385:
Optics, Illumination, and Image Sensing for Machine Vision V
Donald J. Svetkoff; Kevin G. Harding; Gordon T. Uber; Norman Wittels, Editor(s)

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