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학술지 Convenient Calibration Method for Unsynchronized Camera Networks Using an Inaccurate Small Reference Object
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저자
김재헌, 구본기
발행일
201210
출처
Optics Express, v.20 no.23, pp.25292-25310
ISSN
1094-4087
출판사
Optical Society of America(OSA),
DOI
https://dx.doi.org/10.1364/OE.20.025292
협약과제
12MT1200, 방통융합형 Full 3D 복원 기술 개발(표준화연계), 구본기
초록
In this paper, a new and convenient calibration algorithm is proposed for unsynchronized camera networks with a large capture volume. The proposed method provides a simple and accurate means of calibration using a small 3D reference object. Moreover, since the inaccuracy of the object is also compensated simultaneously, the manufacturing cost can be decreased. The extrinsic and intrinsic parameters are recovered simultaneously by capturing an object placed arbitrarily in different locations in the capture volume. The proposed method first resolves the problem linearly by factorizing projection matrices into the camera and the object pose parameters. Due to the multi-view constraints imposed on factorization, consistency of the rigid transformations among cameras and objects can be imposed. These consistent estimation results can be further refined using a non-linear optimization process. The proposed algorithm is evaluated via simulated and real experiments in order to verify that it is more efficient than previous methods. © 2012 Optical Society of America.
KSP 제안 키워드
Calibration method, Camera network, Different locations, Multi-view, Nonlinear optimization, Rigid transformations, calibration algorithm, consistent estimation, intrinsic parameters, manufacturing cost, object pose