| 한글제목(Korean Title) |
Combined Static and Dynamic Platform Calibration for an Aerial Multi-Camera System |
| 영문제목(English Title) |
Combined Static and Dynamic Platform Calibration for an Aerial Multi-Camera System |
| 저자(Author) |
Hong-Xia Cui
Jia-Qi Liu
Guo-Zhong Su
|
| 원문수록처(Citation) |
VOL 10 NO. 06 PP. 2689 ~ 2708 (2016. 06) |
한글내용
(Korean Abstract) |
|
영문내용
(English Abstract) |
Multi-camera systems which integrate two or more low-cost digital cameras are adopted to reach higher ground coverage and improve the base-height ratio in low altitude remote sensing. To guarantee accurate multi-camera integration, the geometric relationship among cameras must be determined through platform calibration techniques. This paper proposed a combined two-step platform calibration method. In the first step, the static platform calibration was conducted based on the stable relative orientation constraint and convergent conditions among cameras in static environments. In the second step, a dynamic platform self-calibration approach was proposed based on not only tie points but also straight lines in order to correct the small change of the relative relationship among cameras during dynamic flight. Experiments based on the proposed two-step platform calibration method were carried out with terrestrial and aerial images from a multi-camera system combined with four consumer-grade digital cameras onboard an unmanned aerial vehicle. The experimental results have shown that the proposed platform calibration approach is able to compensate the varied relative relationship during flight, acquiring the mosaicing accuracy of virtual images smaller than 0.5pixel. The proposed approach can be extended for calibrating other low-cost multi-camera system without rigorously mechanical structure. |
| 키워드(Keyword) |
Platform calibration
multi-camera system
computer vision system
UAV
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| 파일첨부 |
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