Camera Distortion Calibration Method Based on Straight Line Characteristics

Min, 张敏 Zhang; Long-xu, 金龙旭 Jin; Guo-ning, 李国宁 Li; Yi-nan, 武奕楠 Wu; Shuang-li, 韩双丽 Han

doi:10.3788/aos201535.0615001

光学学报

2015

DOI: 10.3788/aos201535.0615001

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Camera Distortion Calibration Method Based on Straight Line Characteristics

张敏 Zhang Min¹,

金龙旭 Jin Long-xu²,

李国宁 Li Guo-ning³

et al.

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A Real‐Time Deformation Monitoring Method for Large‐Scale Structure Based on Relay Camera

Liu

2021

Journal of Sensors

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In the process of the deformation monitoring for large-scale structure, the mobile vision method is often used. However, most of the existent researches rarely consider the real-time property and the variation of the intrinsic parameters. This paper proposes a real-time deformation monitoring method for the large-scale structure based on a relay camera. First, we achieve the real-time pose-position relationship by using the relay camera and the coded mark points whose coordinates are known. The real-time extrinsic parameters of the measuring camera are then solved according to the constraint relationship between the relay camera and the measuring camera. Second, the real-time intrinsic parameters of the measuring camera are calculated based on the real-time constraint relationship among the extrinsic parameters, the intrinsic parameters, and the fundamental matrix. Finally, the coordinates of the noncoded measured mark points, which are affixed to the surface of the structure, are achieved. Experimental results show that the accuracy of the proposed method is higher than 1.8 mm. Besides, the proposed method also possesses the real-time and automation property.

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A Real‐Time Deformation Monitoring Method for Large‐Scale Structure Based on Relay Camera

Liu

2021

Journal of Sensors

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Improved separated-parameter calibration method for binocular vision measurements with a large field of view

Zhang¹,

Liu²,

Wang³

et al. 2020

Opt. Express

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Large field-of-view (FOV) calibration is indispensable to ensure the accuracy of vision measurement systems for large aviation components. We propose an improved separated-parameter calibration method for large-FOV binocular vision measurements with a high flexibility and accuracy. Firstly, the camera parameters are separately calibrated according to the sub-area features of image. Subsequently, based on the spatial-calibration accuracy, a stereoscopic calibration object is devised. The mean error of the proposed method is experimentally obtained as 0.13 mm for a FOV of 2.0 m × 1.5 m. Its feasibility and effectiveness for the measurement in the field is validated by workshop calibration.

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Camera Distortion Calibration Method Based on Straight Line Characteristics

Cited by 2 publications

References 0 publications

A Real‐Time Deformation Monitoring Method for Large‐Scale Structure Based on Relay Camera

A Real‐Time Deformation Monitoring Method for Large‐Scale Structure Based on Relay Camera

Improved separated-parameter calibration method for binocular vision measurements with a large field of view

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