同源双光路能见度仪的光斑提取算法研究

大气与环境光学学报 ›› 2015, Vol. 10 ›› Issue (6): 495-504.

同源双光路能见度仪的光斑提取算法研究

杨丰羽1,2, 杨玲1,2, 缪璨1,2, 甄小琼1,2

（1 成都信息工程学院电子工程学院，四川成都 610225；
2 中国气象局大气探测重点开放实验室，四川成都 610225）

收稿日期:2015-01-13 修回日期:2015-02-09 出版日期:2015-11-28 发布日期:2015-11-12
通讯作者: 杨丰羽 (1990-)，男，重庆人，研究生，研究方向为图像处理。 E-mail:alexyangfox@qq.com
作者简介:杨丰羽 (1990-)，男，重庆人，研究生，研究方向为图像处理。
基金资助:
国家公益性行业（气象）科研专项项目（GYHY201106047）资助

Segmentation of Light Spots for Single-Light-Source Dual-Light-Path Transmissometer

YANG Fengyu1,2, YANG Ling1,2, MIAO Can1,2, ZHEN Xiaoqiong1,2

(1 College of Electronics, Chengdu University of Information Technology, Chengdu 610225, China;
2 Key Laboratory of Atmospheric Sounding, China Meteorological Administration, Chengdu 610225, China )

Received:2015-01-13 Revised:2015-02-09 Published:2015-11-28 Online:2015-11-12

摘要/Abstract

摘要：

同源双光路能见度仪是一种基于数字摄像法的能见度仪，光斑提取算法是其能见度反演算法中的关键环节之一。从光斑成像的物理原理出发，提出了两种光斑提取算法。实验证明，即使没有图像预处理和数据后处理，其结果也和Vaisala LT31的结果具有很好的一致性。在确定上述两种方法中涉及的参数时，引入加权均方误差参量作为确定参数时的代价函数，该参量相对于其他参量有更好的效果，同时本参量还可以作为评价能见度结果的辅助指标。

关键词: 同源双光路能见度仪, 透射式能见度仪, 能见度, 光斑提取

Abstract:

Single-light-source dual-light-path transmissometer is a kind of transmissometers based on digital photography. The method of segmenting the light spots from the image is one of the key processes in the derivation of visibility. Based on the formation of the image, two methods of segmenting the light spots are presented. The results computed with the two methods above are matched with the results of Vaisala LT31 very well, even without pre-processing of the images and post-processing of the data. In order to find the parameters involved in the two methods above, weighted mean squared error (WMSE) is introduced as a cost function. As a cost function, WMSE performs better than some other frequently used criterion. At the same time, WMSE can be adopted to assist the judgment of the performances of the methods above.

Key words: single-light-source dual-light-path transmissometer, transmissometer, visibility, segmentation of light spots

中图分类号:

P415

杨丰羽杨玲缪璨甄小琼. 同源双光路能见度仪的光斑提取算法研究[J]. 大气与环境光学学报, 2015, 10(6): 495-504.

YANG Feng-Yu, YANG Ling, MIAO Can, ZHEN Xiao-Qiong. Segmentation of Light Spots for Single-Light-Source Dual-Light-Path Transmissometer[J]. Journal of Atmospheric and Environmental Optics, 2015, 10(6): 495-504.

参考文献

[1] Jarraud M. Guide to Meteorological Instruments and Methods of Observation (WMO-No. 8) [J]. World Meteorological Organisation: Geneva, Switzerland, 2008.
[2] Du Chuanyao, Ma Shuqing, Yang Ling, et al. Dual optical path visibility system measuring method and experiment [J]. Chinese Journal of Applied Meteorological Science, 2014, (5): 610-617(in Chinese).
杜传耀, 马舒庆, 杨玲, 等. 双光路能见度测量方法和试验 [J]. 应用气象学报, 2014, (5): 610-617.
[3] Wang J, Mao J, Zhao C, et al. A novel four-wavelength transmissometer for distinguishing haze and fog [J]. Acta Meteorologica Sinica, 2013, 27: 556-565.
[4] Liu Qianqian, Zhang Bin. Nighttime visibility measurement using dual target approach based on digital video cameras [J]. Science & Technology Information, 2013, (7): 80-81 (in Chinese).
刘倩倩, 张宾. 基于数字摄像的双目标法测量夜间能见度 [J]. 科技信息, 2013, (7): 80-81.
[5] Li Yongjun, Zhang Yujun, Zhou Yi, et al. Image processing in nighttime visibility meter based on watershed segmentation algorithm [J]. Journal of Atmospheric and Environmental Optics, 2012, 7: 131(in Chinese).
李勇军, 张玉钧, 周毅, 等. 基于分水岭分割算法夜间能见度仪的图像处理方法研究 [J]. 大气与环境光学学报, 2012, 7: 131.
[6] Bayer B E. Color imaging array: Patent Google Patents [P]. 1976.
[7] Guild J. The colorimetric properties of the spectrum [J]. Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Mathematical or Physical Character, 1932, 230: 149-187.
[8] Narasimhan S G, Nayar S K. Vision and the atmosphere [J]. Int. J. Comput. Vis., 2002, 48: 233-254.
[9] Lv Weitao, Tao Shanchang, Tan Yongbo, et al. Application of practical blackbody technique to digital photography visiometer system [J]. Journal of Applied Meteorologcial Science, 14(6): 691-699 (in Chinese).
吕伟涛, 陶善昌, 谭涌波, et al. 数字摄像能见度观测系统中实用黑体技术的应用[J]. 应用气象学报, 2003, 14(6): 691-699.
[10] Bevington P R, Robinson D K. Data Reduction and Error Analysis for the Physical Sciences [M]. McGraw-Hill New York. 1969.
[11] Lv Weitao, Tao Shanchang, Liu Yifeng, et al. Measuring meteorological visibility based on digital photography-dual differential luminance method and experimental study [J]. Chinese Journal of Atmospheric Science, 2004, 28(4): 559-570 (in Chinese).
吕伟涛, 陶善昌, 刘亦风, 等. 基于数字摄像技术测量气象能见度——双亮度差方法和试验研究 [J]. 大气科学, 2004, 28(4): 559-570.
[12] Annex I. Annex 3–Meteorological Service for International Air Navigation [M]. International Civil Aviation Organization. 2010.
[13] VAISALA. User's Guide of Vaisala Transmissometer LT31 [M]. 2010.
[14] Dai Pangda, Zhang Yujun, Lu Changhua, et al. Research on night Visibility Estimation Method Based on Image Features of Dual Light Sources. Spectroscopy and Spectral Analysis [J]. 2014. (1): 001(in Chinese)
戴庞达, 张玉钧, 鲁昌华, 等. 基于双光源图像特征的夜间能见度观测方法研究[J]. 光谱学与光谱分析, 2014, (1): 001.