1 March 1991 Mobile system for measuring retroreflectance of traffic signs
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Proceedings Volume 1385, Optics, Illumination, and Image Sensing for Machine Vision V; (1991) https://doi.org/10.1117/12.25344
Event: Advances in Intelligent Robotics Systems, 1990, Boston, MA, United States
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.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
John J. Lumia, John J. Lumia, } "Mobile system for measuring retroreflectance of traffic signs", Proc. SPIE 1385, Optics, Illumination, and Image Sensing for Machine Vision V, (1 March 1991); doi: 10.1117/12.25344; https://doi.org/10.1117/12.25344
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