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Proceedings Paper

Estimations for optimal angular retroreflectance scale of road-object retroreflective markers
Author(s): Vladimir V. Barun
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Paper Abstract

This paper considers an active vision system with spaced light source and receiver that simulates illumination and observation conditions typical for a car driver in fog. The objects of the investigations are image contrast and limiting visibility range for a characteristics non- Lambertian target, namely for a retroreflector. Calculations are made for a Gaussian angular dependence of its radiance factor centered near the direction opposite to the incident light direction. We concentrate our attention on studying effects of the angular retroreflectance scale on contrast and limiting visibility range of such a retroreflective marker. Here is shown the optimal retroreflective characteristics to exist that provide the maximal contrast and the best visibility of the marker under other equal conditions. The estimations of the angular scale are presented for various practical situations. The limiting visibility range values of retroreflective and Lambertian markers are compared.

Paper Details

Date Published: 27 January 1998
PDF: 8 pages
Proc. SPIE 3207, Intelligent Transportation Systems, (27 January 1998); doi: 10.1117/12.300847
Show Author Affiliations
Vladimir V. Barun, Institute of Physics (Belarus)


Published in SPIE Proceedings Vol. 3207:
Intelligent Transportation Systems
Marten J. de Vries; Pushkin Kachroo; Kaan Ozbay; Alan C. Chachich, Editor(s)

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