Projector calibration method based on stereo vision system

The stereo vision system is the special engineering measurement instrument of the Chang'e-4 lunar rover. It is composed of the Navigation Camera (NavCam) and the Mast Mechanism (MasMec). An improved self-calibration method for the stereo vision system of the Chang'e-4 lunar rover is proposed. The method consists of two parts: the NavCam's self-calibration and the MasMec's self-calibration. A combined adjustment based on the points and lines is proposed. The baseline constraint of the NavCam is considered. The self-calibration model of the MasMec is established based on the product-of-exponentials formula. Finally, the premission laboratory calibration and the on-site calibration are carried out. The laboratory calibration shows that the proposed approach has high accuracy. The checkpoint with a distance of about 2.7 m to the left NavCam has a point error of about 4 mm. Finally, the proposed approach is applied in the on-site calibration.

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The Comparison of Calibration Method of Binocular Stereo Vision System

Proceedings of the 3rd International Conference on Material, Mechanical and Manufacturing Engineering ◽

10.2991/ic3me-15.2015.171 ◽

2015 ◽

Cited By ~ 1

Author(s):

Zhang Ke ◽

Gao Zhao

Keyword(s):

Stereo Vision ◽

Vision System ◽

Calibration Method ◽

Stereo Vision System ◽

Binocular Stereo Vision ◽

Binocular Stereo

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A Method of Line Structured Light Vision System Calibration Based on Stereo Vision

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.397-400.1453 ◽

2013 ◽

Vol 397-400 ◽

pp. 1453-1458 ◽

Cited By ~ 1

Author(s):

Yu Bao Liu ◽

Bin Liu ◽

Jun Yi Lin

Keyword(s):

Stereo Vision ◽

Vision System ◽

Structured Light ◽

Calibration Method ◽

Calibration Procedure ◽

Control Points ◽

Binocular Stereo Vision ◽

Projector Calibration ◽

Binocular Stereo ◽

Structured Light Vision

It is a difficult task to get enough numbers of highly accurate control points for projector calibration in line structured light vision system. A new projector calibration method based on binocular stereo vision is proposed in this paper. Two cameras calibration can be done usingtraditional camera calibration method and they composed a binocular stereo vision. In projector calibration procedure, a planar template was located at several different positions in front of the stereo vision system. Two cameras captured the stripe images in each position simultaneously. Every center points of the laser stripe can be used as control points of the projector plane. The 3D coordinate of the stripe center points can be obtained through binocular stereo vision principle easily. So the light plane can be calculated quickly. Experiments were carried out and the result shows that the proposed method is flexible and stable.

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A Fast Linear Calibration of Computer Stereo Vision System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.305.372 ◽

2011 ◽

Vol 305 ◽

pp. 372-377

Author(s):

Ke Zhang ◽

Han Pin Luo

Keyword(s):

Stereo Vision ◽

Vision System ◽

Complex Function ◽

Calibration Method ◽

Calibration Model ◽

Linear Calibration ◽

Vision Measurement ◽

Stereo Vision System ◽

Binocular Stereo Vision ◽

Binocular Stereo

Computer stereo vision has been paid high attention in areas such as industry measurement and automatic control. Calibration of stereo vision system is a key step to implement vision measurement. Nonlinear calibration method involves too many parameters and too complex function, so the processing of optimization is difficult and slow. In this paper, two digital cameras are used to set up stereo vision system which provides convenient experimental operation. The binocular stereo vision system is calibrated using linear calibration model. The results indicate that the method is stable and fast with high precision and practicability.

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A Calibration Method of Binocular Stereo Vision System Based on Halcon

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.989-994.3007 ◽

2014 ◽

Vol 989-994 ◽

pp. 3007-3010

Author(s):

Zhi Xian Zhang ◽

Zhen De Zhu

Keyword(s):

Stereo Vision ◽

Vision System ◽

Calibration Method ◽

Pinhole Camera ◽

Camera Model ◽

Stereo Vision System ◽

Imaging Model ◽

Binocular Stereo Vision ◽

Calibration Experiment ◽

Binocular Stereo

This paper describes the pinhole camera model combined with an area sensor and a regular lens and the imaging model of the binocular stereo vision system. Also a method to determine the internal and external parameters of a camera by transferring the coordinates three times is described. Then a calibration experiment is carried out with the Halcon calibration board which proved the method works. The method mentioned in this paper has laid a good foundation for measuring the size of objects with the binocular stereo vision system.

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