A step-by-step geometric correction and error analysis of swing-swept array thermal infrared aerial image
Received:March 19, 2019  Revised:April 09, 2020  download
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Author NameAffiliationPostcode
LI Sai Shanghai Institute of Technical Physics Chinese Academy of Sciences, Shanghai 200083 China
CAS Key Laboratory of Infrared System Detection and Imaging Technology Shanghai Institute of Technical PhysicsShanghai 200083China
University of Chinese Academy of SciencesBeijing 100049China 
100049
HU Yong Shanghai Institute of Technical Physics Chinese Academy of Sciences, Shanghai 200083 China
CAS Key Laboratory of Infrared System Detection and Imaging Technology Shanghai Institute of Technical PhysicsShanghai 200083China 
200083
GONG Cai-Lan Shanghai Institute of Technical Physics Chinese Academy of Sciences, Shanghai 200083 China
CAS Key Laboratory of Infrared System Detection and Imaging Technology Shanghai Institute of Technical PhysicsShanghai 200083China 
SONG Wen-Tao Shanghai Institute of Technical Physics Chinese Academy of Sciences, Shanghai 200083 China
CAS Key Laboratory of Infrared System Detection and Imaging Technology Shanghai Institute of Technical PhysicsShanghai 200083China
University of Chinese Academy of SciencesBeijing 100049China 
Abstract:Aiming at the problem of no control point geometric correction for plane array swabbing data, a step by step geometric correction method for plane array swabbing thermal infrared image based on POS data is proposed.The main steps include image correction using the visual vector method, projection to Gaussian auxiliary plane for splicing and virtual control points are extracted. The second geometric precision correction of the global image is carried out by using the least square method to realize the geometric correction of the thermal infrared image in the research area. The validity of the proposed algorithm is verified by obtaining experimental images, the relative error of the distance between two points in the plane is 0.81%, then the relative error of the azimuth angle of two points in the plane is 0.72%, which is significantly improved in comparison with the direct application of POS correction error. The method can be applied to the geometric correction of flight images without ground control points in other plane array swallows.
keywords:aerial photogrammetry  geometric correction  vision vector  swing-swept array
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Copyright:《Journal of Infrared And Millimeter Waves》