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, "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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