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Proceedings Paper

Properties of light reflected from road signs in active imaging for driving safety
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Paper Abstract

Night-vision systems in vehicles are a new emerging technology. A crucial problem in active (illumination-based) systems is distortion of images by saturation and blooming, due to strong retro-reflections from road signs. In this work we quantified this phenomenon. We measured the Mueller matrices and the polarization state of the reflected light from three different types of road signs commonly used. Measurements of the reflected intensity were taken also with respect to the angle of reflection. We found that different types of signs have different reflection properties. It is concluded from our measurements that the optimal solution for attenuating the retro-reflected intensity is using a linear horizontal polarized light source and a linear vertical polarizer. Unfortunately, while the performance of this solution is good for two types of road signs, it is less efficient for the third sign type.

Paper Details

Date Published: 6 October 2007
PDF: 12 pages
Proc. SPIE 6737, Electro-Optical and Infrared Systems: Technology and Applications IV, 67370H (6 October 2007); doi: 10.1117/12.737773
Show Author Affiliations
Aviran Halstuch, Ben-Gurion Univ. of the Negev (Israel)
Yitzhak Yitzhaky, Ben-Gurion Univ. of the Negev (Israel)

Published in SPIE Proceedings Vol. 6737:
Electro-Optical and Infrared Systems: Technology and Applications IV
David A. Huckridge; Reinhard R. Ebert, Editor(s)

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