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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Smart Structures and Systems, An International Journal Smart Structures and Systems, An International Journal Vol.25 No.2
- 발행연도
- 2020.1
- 수록면
- 135 - 153 (19page)
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초록· 키워드
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There has been a sustained interest towards the non-contact structural displacement measurement by means of videogrammetric technique. On the way forward, one of the major concerns is the spurious image drift induced by temperature variation. This study therefore carries out an investigation into the temperature effect of videogrammetric technique, focusing on the exploration of the mechanism behind the temperature effect and the elimination of the temperature-caused measurement error. 2D videogrammetric measurement tests under monotonic or cyclic temperature variation are first performed. Features of measurement error and the casual relationship between temperature variation and measurement error are then studied. The variation of the temperature of digital camera is identified as the main cause of measurement error. An excellent linear relationship between them is revealed. After that, camera parameters are extracted from the mapping between world coordinates and pixels coordinates of the calibration targets. The coordinates of principle point and focal lengths show variations well correlated with temperature variation. The measurement error is thought to be an outcome mainly attributed to the variation of the coordinates of principle point. An approach for eliminating temperature-caused measurement error is finally proposed. Correlation models between camera parameters and temperature are formulated. Thereby, camera parameters under different temperature conditions can be predicted and the camera projective matrix can be updated accordingly. By reconstructing the world coordinates with the updated camera projective matrix, the temperature-caused measurement error is eliminated. A satisfactory performance has been achieved by the proposed approach in eliminating the temperature-caused measurement error.
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참고문헌 (39)
참고문헌 신청
Y.I. Abdel-Aziz / 2015 / Direct Linear Transformation from Comparator Coordinates into Object Space Coordinates in Close-Range Photogrammetry / Photogrammetric Engineering & Remote Sensing 81(2):103~107
Marcin Adamczyk / 2018 / Temperature Compensation Method for Digital Cameras in 2D and 3D Measurement Applications / Sensors 18(11):3685
Javad Baqersad / 2017 / Photogrammetry and optical methods in structural dynamics – A review / Mechanical Systems and Signal Processing 86:17~34
James Mark William Brownjohn / 2017 / Vision-Based Bridge Deformation Monitoring / Frontiers in Built Environment 3
G. Busca / 2014 / Vibration Monitoring of Multiple Bridge Points by Means of a Unique Vision-Based Measuring System / Experimental Mechanics 54(2):255~271
Marcin Adamczyk / 2018 / Temperature Compensation Method for Digital Cameras in 2D and 3D Measurement Applications / Sensors 18(11):3685
Javad Baqersad / 2017 / Photogrammetry and optical methods in structural dynamics – A review / Mechanical Systems and Signal Processing 86:17~34
James Mark William Brownjohn / 2017 / Vision-Based Bridge Deformation Monitoring / Frontiers in Built Environment 3
G. Busca / 2014 / Vibration Monitoring of Multiple Bridge Points by Means of a Unique Vision-Based Measuring System / Experimental Mechanics 54(2):255~271
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