Research Topics

Estimation of the Meteorological Visibility Distance in Night Fog

In this paper, we propose a new way to estimate fog extinction at night using a classification of fog depending on the forward scattering. We show that a characterization of fog based on the atmospheric extinction parameter only is not sufficient. This method works in dense fogs (meteorological visibility distances < 400m) with a single image and three known light sources. The method is validated on synthetic images generated with a semi Monte-Carlo ray tracing software dedicated to fog simulation. We drove this study in simulated environment in order to help us designing a test site located outdoor.

Publications Gallen, R., Hautière, N., Dumont, E. and Colomb, M. Introducing forward scattering in adaptive rear lighting systems. In 27th Session of the CIE (CIE'11), South Africa, 2011.   Gallen, R., Hautière, N. and Dumont, E. Static Estimation of the Meteorological Visibility Distance in Night Fog with Imagery. In IEICE Transactions on Information and Systems, E93-D (7): 1780-1787, 2010.     Gallen, R., Hautière, N. and Dumont, E. Static Estimation of Meteorological Visibility Distance in Night Fog with Imagery. In IAPR Conference on Machine Vision Applications (MVA'09), Yokohama, Japan, pages 300-303, 2009.

Slides CIE2011 presentation

Posters CIE2011a poster MVA2009 poster

Related topics Physics-based Vision Performance Evaluation Atmospheric visibility assessment