Effect of Calibration Grid Size and Position on Machine Vision Measurement

Jie Sun; Zeng Pu Xu; Cong Ling Zhou; Yong Qiang Wang

doi:10.4028/www.scientific.net/AMM.220-223.1303

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 220-223Effect of Calibration Grid Size and Position on...

Effect of Calibration Grid Size and Position on Machine Vision Measurement

Abstract:

In order to improve the measurement accuracy of machine vision, this paper focuses on the effect of calibration grid size and position on machine vision measurement accuracy by analysing the measurement error of the points inside and outside of the grid. The experimental results show that the measurement accuracy of the internal points is higher than that of the external points. The measurement errors increase firstly, then decrease, increase, and finally decrease which measuring point from the edge to the opposite edge in the calibration grid. While measurement errors of outside points increases with the increasing distance to the corner point. If the center of calibration grid coincides with the center of calibration board, measurement accuracy is high. However, if the center of calibration grid doesn't coincide with the center of calibration board, measurement accuracy is low. This results may provide direct means for the application of machine vision system in engineering.

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Periodical:

Applied Mechanics and Materials (Volumes 220-223)

Pages:

1303-1306

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.220-223.1303

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Online since:

November 2012

Authors:

Jie Sun, Zeng Pu Xu, Cong Ling Zhou, Yong Qiang Wang

Keywords:

Calibration Grid, Error Analysis, Machine Vision, Position, Size

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