An onsite structure parameters calibration of large FOV binocular stereovision based on small-size 2D target

“…In order to overcome this problem, an onsite structure parameter calibration method for large FOV binocular stereovision with a small target was proposed in our previous work. 27 The method requires that the camera’s intrinsic parameters should be known. They could be calibrated using a large precise rig in an ideal environment such as laboratory.…”

Section: Calibrationmentioning

confidence: 99%

An onsite inspection sensor for the formation of hull plates based on active binocular stereovision

Wang

Zhen

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part B:

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Nowadays, the inspection of formed hull plates is still more dependent on wooden templates. The method based on wooden templates is imprecise, inefficiency and costly. In this article, an alternate measurement sensor for onsite inspection of formed hull plates is developed. The sensor can obtain accurate quantitative result with high efficiency. The case study demonstrated that the sensor could substitute wooden templates to inspect formed hull plates in workshop.

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“…12 However, for the large-size objects, it often failed to balance measurement range, accuracy, and efficiency in the application of large-scale metrology since the measurement environment is difficult to control, large-scale calibration target is difficult to fabricate, and the calibration process is complicated. 13,14…”

Section: Introductionmentioning

confidence: 99%

Flexible method for accurate calibration of large-scale vision metrology system based on virtual 3-D targets and laser tracker

Zhang

et al. 2019

International Journal of Advanced Robotic Systems

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For the purpose of obtaining high-precision in stereo vision calibration, a large-size precise calibration target, which can cover more than half of the field of view is vital. However, large-scale calibration targets are very difficult to fabricate. Based on the idea of error tracing, a high-precision calibration method for vision system with large field of view by constructing a virtual 3-D calibration target with a laser tracker was proposed in this article. A virtual 3-D calibration target that covers the whole measurement space can be established flexibly and the measurement precision of the vision system can be traceable to the laser tracker. First, virtual 3-D targets by calculating rigid body transformation with unit quaternion method were constructed. Then, the high-order distortion camera model was taken into consideration. Besides, the calibration parameters were solved with Levenberg–Marquardt optimization algorithm. In the experiment, a binocular stereo vision system with the field of view of 4 × 3 × 2 m3 was built for verifying the validity and precision of the proposed calibration method. It is measured that the accuracy with the proposed method can be greatly improved comparing with traditional plane calibration method. The method can be widely used in industrial applications, such as in the field of calibrating large-scale vision-based coordinate metrology, and six-degrees of freedom pose tracking system for dimensional measurement of workpiece, as well as robotics geometrical accuracy detection and compensation.

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An onsite structure parameters calibration of large FOV binocular stereovision based on small-size 2D target

Cited by 14 publications

References 19 publications

An on-line calibration method for camera with large FOV based on prior information

An on-line calibration method for camera with large FOV based on prior information

An onsite inspection sensor for the formation of hull plates based on active binocular stereovision

Flexible method for accurate calibration of large-scale vision metrology system based on virtual 3-D targets and laser tracker

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