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Open AccessArticle

Extrinsic Parameters Calibration Method of Cameras with Non-Overlapping Fields of View in Airborne Remote Sensing

by Lei Yin 1,2, Xiangjun Wang 1,2,*, Yubo Ni 2, Kai Zhou 2 and Jilong Zhang 2
1
State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
2
MOEMS Education Ministry Key Laboratory, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2018, 10(8), 1298; https://doi.org/10.3390/rs10081298
Received: 2 July 2018 / Revised: 2 August 2018 / Accepted: 13 August 2018 / Published: 16 August 2018
(This article belongs to the Section Remote Sensing Image Processing)
Multi-camera systems are widely used in the fields of airborne remote sensing and unmanned aerial vehicle imaging. The measurement precision of these systems depends on the accuracy of the extrinsic parameters. Therefore, it is important to accurately calibrate the extrinsic parameters between the onboard cameras. Unlike conventional multi-camera calibration methods with a common field of view (FOV), multi-camera calibration without overlapping FOVs has certain difficulties. In this paper, we propose a calibration method for a multi-camera system without common FOVs, which is used on aero photogrammetry. First, the extrinsic parameters of any two cameras in a multi-camera system is calibrated, and the extrinsic matrix is optimized by the re-projection error. Then, the extrinsic parameters of each camera are unified to the system reference coordinate system by using the global optimization method. A simulation experiment and a physical verification experiment are designed for the theoretical arithmetic. The experimental results show that this method is operable. The rotation error angle of the camera’s extrinsic parameters is less than 0.001rad and the translation error is less than 0.08 mm. View Full-Text
Keywords: stereo vision; camera calibration; extrinsic parameter; non-overlapping field of view; airborne remote sensing stereo vision; camera calibration; extrinsic parameter; non-overlapping field of view; airborne remote sensing
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Yin, L.; Wang, X.; Ni, Y.; Zhou, K.; Zhang, J. Extrinsic Parameters Calibration Method of Cameras with Non-Overlapping Fields of View in Airborne Remote Sensing. Remote Sens. 2018, 10, 1298.

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