Research of Measuring High Visibility at Night Based on Dual Light Sources Digital Image

Abstract:

Research on measuring night visibility using digital images mainly focused on low visibility conditions nowadays. Also, the long term observation leads to fluctuations of the single light source, which would undermine the measuring range and precision. In this context, this paper presents the dual light sources measurement method to eliminate the fluctuations of single source and to achieve both high measuring range and precision at night conditions. The source of visibility measuring error is firstly formulated through an error analysis. Then we propose a dual light sources framework that yields two identical beams to measure the visibility, which is advantageous over the single light source method and capable of measuring high visibility. In the experiments, the stability of the dual light sources is firstly tested by a 72-hour running. The average luminance ration of dual light sources is 0.9932 and the average relative error is 0.04%. The relative error of dual light sources luminance ration is only 0.2% when the fluctuations of single source is as high as 2.28%. Then the dual light sources is applied in the digital image night visibility measuring system to evaluate its validity. The result shows that the dual light sources method is capable of measuring the range of 390 times of baseline (40m baseline) with the error less than 15%, which fully meets the meteorological demands.

• Periodical: Advanced Materials Research (Volumes 718-720)
• Pages: 2270-2275
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.718-720.2270
• Online since: July 2013
• Authors: Pang Da Dai, Yu Jun Zhang, Chang Hua Lu
• Keywords:

  Found Keywords

  Digital Image

  , Dual Light Sources, Night Visibility

References

[1] B. Raouf, N. Hautière, É. Dumont, A model-driven approach to estimate atmospheric visibility with ordinary cameras, J. Atmospheric Environment. 45(2011), pp.5316-5324.

DOI: 10.1016/j.atmosenv.2011.06.053

[2] M. W. An, Q. M. Chen, Z. L. Guo, Visibility detection method and system design based on traffic video, J. Chinese Journal of Scientific Instrument. 2010, 31(5), pp.1148-1153.

[3] X. Zhang, Bo LI, Qimei CHEN, PTZ visitiblity detection algorithm based on luminance characteristic and its implementation, J. Chinese Journal of Scientific Instrument,2011, 32(2), pp.381-387.

[4] R. Babari, N. Hautière, Visibility monitoring using conventional roadside cameras Emerging applications, J. Transportation Research Part C, 2012,pp.77-81.

DOI: 10.1016/j.trc.2011.11.012

[5] Dumont, Cavallo, Extended photometric model of fog effects on road vision, Journal of the TRB, no.1862,pp.77-8

[6] R. Gallen, N. Hautiere, E. Dumont, static Estimation of the Meteorological Visibility Distance in Night Fog with Imagery, C. MVA2009 IAPR Conference on Machine Vision Applications, Yokohama,JAPAN,2009, pp.300-303.

[7] S. G. Narasimhan, S. K. Nayar, Vision and Atmosphere, J. Int J Compute Vision, 2002,48(3), pp.233-254.

[8] S. G. Narasimhan, S. K. Nayar, Shedding light on the weather, C. Proc.IEEE CVPR'03,2003, pp.655-672.

[9] S. Metari, F. Deschenes, A new Convolution Kernel for Atmospheric Point Spread Function Applied to Computer Vision, C. Proc.IEEE ICCV'07, 2007, pp.1-8.

DOI: 10.1109/iccv.2007.4408899

[10] G. Nathan, S. Newsam, Using Visibility Cameras to Estimate Atmospheric Light Extinction, C. Application of Computer Vision(WACV),2011, pp.577-584.

DOI: 10.1109/wacv.2011.5711556

[11] Middleton. Vision through the Atmosphere, University of Toronto Press,1952.

[12] Y. J. Li, Y. J. Zhang, Y. Zhou, DSP-based measurement system for night visibility of embedded digital camera, J. Modern Electronics Technique, 2012, 35(13),pp.119-122.

[13] Y. H. Gao, Z. Y. An, N. N. LI, Optical design of Gaussian beam shaping, J. Opt. Precision Eng., 2011,19 (7), pp.1464-1471.

[14] Q. Y. Xu, X. B. Zheng, J. J. Li, The Development and Characteristics Research of the Laser Illuminated Integrating Sphere, J. Opt. Precision Eng., 2009,17(4), pp.738-744.

[15] J. H. Xiu, P. Huang, J. Li, Radiometric calibration of large area array color CCD aerial mapping camera, J. Opt. Precision Eng, 2012, 20 (6), pp.1365-1373.

DOI: 10.3788/ope.20122006.1365

[16] Y. J. Li, Y. J. Zhang, Y. Zhou, Image Processing in Nighttime Visibility Meter based on Watershed Segmentation Algorithm, J. Journal of Atmospheric and Environmental Optics, 2012,7 (2), pp.131-138