Visibility monitoring using conventional roadside cameras - Emerging applications

被引：47

作者：

Babari, Raouf ^{[1
]}

Hautiere, Nicolas ^{[1
]}

Dumont, Eric ^{[1
]}

Paparoditis, Nicolas ^{[2
]}

Misener, James ^{[3
]}

机构：

[1] Univ Paris Est, Ifsttar, IM, LEPSIS, F-75015 Paris, France

[2] Univ Paris Est, IGN, MATIS, F-94160 St Mande, France

[3] Boaz Allen Hamilton Inc, San Francisco, CA USA

来源：

TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES | 2012年 / 22卷

关键词：

Camera; Atmospheric visibility; Road safety; Meteorological observation; Air quality; Intelligent transportation systems; FOG;

D O I：

10.1016/j.trc.2011.11.012

中图分类号：

U [交通运输];

学科分类号：

08 ; 0823 ;

摘要：

The measurement of atmospheric visibility is an important element for road and air transportation safety. We propose in this paper a novel estimator of the atmospheric visibility by already existing conventional highway cameras, with a technique based on the gradient magnitude selected by applying Lambert's law with respect to changes in lighting conditions. The response of this estimator is calibrated by non-linear regression with data from a visibility meter installed in a test site which has been instrumented with a camera. Through our technique, atmospheric visibility estimates are obtained with an average error of 30% for images taken in the day, with sky luminance between 10 and 8000 cd m(-2) and visibility distances up to 15 km. Our results allow us to envision practical implementation on roadsides in the near future to determine local visibility for the benefit of road safety, meteorological observation and air quality monitoring. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：17 / 28

页数：12

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