Angular Calibration of Visible and Infrared Binocular All-Sky-View Cameras Using Sun Positions

doi:10.3390/rs13132455

	Angular Calibration of Visible and Infrared Binocular All-Sky-View Cameras Using Sun Positions
	Xie, Wanyi 1,2; Wang, Yiren 1,2; Xia, Yingwei 1; Gao, Zhenyu 1; Liu, Dong 1
刊名	REMOTE SENSING
	2021-07-01
卷号	13
关键词	angular calibration sun positions visible and infrared binocular all-sky-view cameras reprojection back projection binocular clouds image registration
DOI	10.3390/rs13132455
通讯作者	Liu, Dong(dliu@aiofm.cas.cn)
英文摘要	Visible and infrared binocular all-sky-view cameras can provide continuous and complementary ground-based cloud observations. Accurate angular calibration for every pixel is an essential premise to further cloud analysis and georeferencing. However, most current calibration methods mainly rely on calibration plates, which still remains difficult for simultaneously calibrating visible and infrared binocular cameras, especially with different imaging resolutions. Thus, in this study, we present a simple and convenient angular calibration method for wide field-of-view visible and infrared binocular cameras. Without any extra instruments, the proposed method only utilizes the relation between the angular information of direct sun lights and the projected sun pixel coordinates to compute the geometric imaging parameters of the two cameras. According to the obtained parameters, the pixel-view-angle for the visible and infrared all-sky images is efficiently computed via back projection. Meanwhile, the projected pixel coordinates for the incident lights at any angle can also be computed via reprojection. Experimental results show the effectiveness and accuracy of the proposed angular calibration through the error estimation of reprojection and back projection. As a novel application, we successfully achieve visible and infrared binocular image registration at the pixel level after finishing angular calibration, which not only verifies the accuracy of calibration results, but also contributes to further cloud parameter analysis under these two different imaging features. The registration results, to our knowledge, also provide a reference for the current blank in visible and infrared binocular cloud image registration.
资助项目	Key Collaborative Research Program of the Alliance of International Science Organizations[ANSO-CR-KP-2020-09] ; International Partnership Program of Chinese Academy of Sciences[116134KYSB20180114] ; Key research and development program of Anhui province of China[S202104b11020058] ; CASHIPS Director's Fund[YZJJ2020QN34]
WOS关键词	IMAGING-SYSTEM ; CLOUD ; RADIANCE ; MODEL
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
语种	英语
出版者	MDPI
WOS记录号	WOS:000670989200001
资助机构	Key Collaborative Research Program of the Alliance of International Science Organizations ; International Partnership Program of Chinese Academy of Sciences ; Key research and development program of Anhui province of China ; CASHIPS Director's Fund
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/123541]
专题	中国科学院合肥物质科学研究院
通讯作者	Liu, Dong
作者单位	1.Chinese Acad Sci, Hefei Inst Phys Sci, Anhui Inst Opt & Fine Mech, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Xie, Wanyi,Wang, Yiren,Xia, Yingwei,et al. Angular Calibration of Visible and Infrared Binocular All-Sky-View Cameras Using Sun Positions[J]. REMOTE SENSING,2021,13.
APA	Xie, Wanyi,Wang, Yiren,Xia, Yingwei,Gao, Zhenyu,&Liu, Dong.(2021).Angular Calibration of Visible and Infrared Binocular All-Sky-View Cameras Using Sun Positions.REMOTE SENSING,13.
MLA	Xie, Wanyi,et al."Angular Calibration of Visible and Infrared Binocular All-Sky-View Cameras Using Sun Positions".REMOTE SENSING 13(2021).