雨滴成像中的散焦模糊复原方法及应用

大气与环境光学学报 ›› 2018, Vol. 13 ›› Issue (4): 315-320.

• 光电技术 • 上一篇

雨滴成像中的散焦模糊复原方法及应用

刘西川, 胡云涛, 高太长, 宋堃

（国防科技大学气象海洋学院, 江苏南京, 211101）

收稿日期:2017-03-15 修回日期:2017-05-11 出版日期:2018-07-28 发布日期:2018-07-10
通讯作者: 刘西川（1985-），男，河北清河人，博士，讲师，主要从事光学大气探测技术方面的研究。 E-mail: liuxc2012@hotmail.com
作者简介:刘西川（1985-），男，河北清河人，博士，讲师，主要从事光学大气探测技术方面的研究。
基金资助:
Supported by National Natural Science Foundation of China （国家自然科学基金, 41327003, 41505135）, Natural Science Foundation of Jiangsu Province（江苏省自然科学基金，BK20150708）

Defocus Blurred Restoration Method for Raindrops Imaging and Its Application

LIU Xichuan, HU Yuntao, GAO Taichang, Song Kun

(College of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, China)

Received:2017-03-15 Revised:2017-05-11 Published:2018-07-28 Online:2018-07-10
Contact: 刘西川（1985-），男，河北清河人，博士，讲师，主要从事光学大气探测技术方面的研究。 E-mail: liuxc2012@hotmail.com
About author:刘西川（1985-），男，河北清河人，博士，讲师，主要从事光学大气探测技术方面的研究。
Supported by:
Supported by National Natural Science Foundation of China （国家自然科学基金, 41327003, 41505135）, Natural Science Foundation of Jiangsu Province（江苏省自然科学基金，BK20150708）

摘要/Abstract

摘要：

针对自主研制的降水微物理特征测量仪存在的成像质量问题，重点考虑与光源相关的散焦模糊，提出了基于点扩散函数的雨滴图像复原方法，利用圆盘函数对雨滴图像进行复原，消除噪声和模糊，得到具有清晰轮廓的雨滴图像。利用与雨滴光学性质相近的玻璃球进行了定标实验，确定了成像系统散焦模糊的半径和图像二值化的阈值。外场实测结果表明，图像复原可以有效修正雨滴尺度及其谱分布，测量得到的雨滴谱和降雨强度与激光雨滴谱仪的结果具有很好的一致性。该方法应用于降水微物理特征测量仪，可以显著提高雨滴谱及其他微物理特征的测量性能。

关键词: 雨滴, 图像, 点扩散函数, 雨滴谱

Abstract:

Aiming at the raindrops imaging degradation of precipitation micro-physical characteristics sensor (PMCS), and consider the defocus blurring due to light source, a raindrop images restoration method based on point spread function (PSF) is proposed. Sharp images of raindrops can be obtained by the disk function. The radius of defocus blurring and thresholds of images binarization are determined by the calibration experiment of a series of glass balls, which have similar optical features with raindrops. The field experiment results show that the images restoration method can precisely correct the raindrops size and their distribution, the raindrop size distribution and rainrate measured by PMCS are in good agreement with the measurements of laser disdrometer. The application of images restoration method can promote the performance of raindrop size distribution, and other micro-physical characteristics measured by PMCS.

Key words: raindrops, images, point spread function, raindrop size distribution

中图分类号:

P412.13

刘西川胡云涛高太长宋堃. 雨滴成像中的散焦模糊复原方法及应用[J]. 大气与环境光学学报, 2018, 13(4): 315-320.

LIU Xi-Chuan, HU Yun-Tao, GAO Tai-Chang, SONG Kun. Defocus Blurred Restoration Method for Raindrops Imaging and Its Application[J]. Journal of Atmospheric and Environmental Optics, 2018, 13(4): 315-320.

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雨滴成像中的散焦模糊复原方法及应用

Defocus Blurred Restoration Method for Raindrops Imaging and Its Application

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