A New Algorithm for Calculating the Daytime Visibility Based on the Color Digital Camera
There are some deficiencies in the traditional daytime visibility calculation method using CCD digital camera: visibility observation value is accurate while using the artificial objectsŒbut expensive; nonzero internal reflection coefficient of the target lead to inaccurate visibility observation results when using natural objects as the target. A new daytime visibility algorithm based on color CCD digital camera is proposed in this paper: we use the color images obtained by the CCD digital camera, then estimate transmission of color digital image by using the knowledge of dark channel prior, and obtain the atmospheric attenuation coefficient form transmission to calculating visibility value. The experimental data show that the max-error of the proposed algorithm is less than 20% which conform to the error provisions of WMO on the meteorological visibility instrument, and simple operation, without artificial target, low cost.
Keywords: Color digital camera, Daytime visibility, A new visibility Algorithm, Estimated transmission
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ABOUT THE AUTHORS
Xiaoting Chen
Xiaoting Chen received the B.E. Degree from Guangxi Normal University, Guilin, China, in 2005. Now she is a student in the Intelligent Detection Laboratory at Hefei University of Technology to study for a Master Degree in Engineering. Her main research interests include signal and information processing, intelligent detection algorithm.
Changhua Lu
Changhua Lu received a Master Degree in Engineering from Harbin Institute of Technology in 1988, and a Ph. D. degree from Chinese Academy Sciences in 2001. He is now a professor and doctoral tutor at Hefei University of Technology, and also a doctoral tutor in Hefei Institutes of Physical Science. His research interests cover signal detection and processing, computer application, DSP technology, photoelectric information processing and automatic test system.
Wenqing Liu
Wenqing Liu is a professor and doctoral tutor in Hefei Institutes of Physical Science. His research interests cover signal detection and processing, spectral analysis and automatic test system.
Yujun Zhang
Yujun Zhang is a researcher and doctoral tutor in Hefei Institutes of Physical Science. His research interests cover signal detection and processing, spectral analysis and DOAS.
Xiaoting Chen
Xiaoting Chen received the B.E. Degree from Guangxi Normal University, Guilin, China, in 2005. Now she is a student in the Intelligent Detection Laboratory at Hefei University of Technology to study for a Master Degree in Engineering. Her main research interests include signal and information processing, intelligent detection algorithm.
Changhua Lu
Changhua Lu received a Master Degree in Engineering from Harbin Institute of Technology in 1988, and a Ph. D. degree from Chinese Academy Sciences in 2001. He is now a professor and doctoral tutor at Hefei University of Technology, and also a doctoral tutor in Hefei Institutes of Physical Science. His research interests cover signal detection and processing, computer application, DSP technology, photoelectric information processing and automatic test system.
Wenqing Liu
Wenqing Liu is a professor and doctoral tutor in Hefei Institutes of Physical Science. His research interests cover signal detection and processing, spectral analysis and automatic test system.
Yujun Zhang
Yujun Zhang is a researcher and doctoral tutor in Hefei Institutes of Physical Science. His research interests cover signal detection and processing, spectral analysis and DOAS.
