A Calibration Method for High Precision Vision Measurement System

Ping Zhao; Wen Zhen Zhao; Zhen Yun Duan

doi:10.4028/www.scientific.net/AMM.543-547.1005

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 543-547A Calibration Method for High Precision Vision...

A Calibration Method for High Precision Vision Measurement System

Abstract:

In order to realize precision measurement for the computer vision measurement system, a system comprehensive calibration method based on straight line imaging characteristics is proposed. The method uses parallel straight line edges of general 00 level gauge groups to comprehensively calibrate the measurement system. It establishes the calibration function that describes the corresponding relationship between the imaging point location and space point position, and then determines the coefficient of the calibration function according to the linear characteristic of gauge block measurement surface edges imaging. This method is simple to operate and is easy to realize and has good versatility. It can comprehensively correct all kinds of system errors such as the optical distortion, the perspective error, the sensor position error and location error of edge detection algorithm. Repeated measurement experiments for the gauges show that the precision of the measurement system can reach by means of this calibration method.

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Periodical:

Applied Mechanics and Materials (Volumes 543-547)

Pages:

1005-1008

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.543-547.1005

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Online since:

March 2014

Authors:

Ping Zhao*, Wen Zhen Zhao, Zhen Yun Duan

Keywords:

Calibration Function, Computer Vision Measurement, System Calibration, System Error

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