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Proceedings Paper

An improved centroid location algorithm for Infrared LED feature points
Author(s): Shaoqiong Wang; Bixi Yan; Mingli Dong; Jun Wang; Peng Sun
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Paper Abstract

The precision of centroid location for infrared LED point images is an important factor, which affects the precision of the light-pen Coordinate Measuring Machining (CMM) .In this paper, the error model using the traditional center of mass (COM) algorithm is analyzed and it is shown that there are systematic error and random error. This paper analyzes the systematic error and random error, and then adopts the Gaussian surface fitting (GSF) algorithm and weighted centre-ofgravity (WCOG) algorithm to compensate systematic errors, meanwhile it analyzes how to reduce random error. The simulation results show that the accuracy of the infrared LED point position can be enhanced from 1/ 20 pixel to 1/100 pixel using the new algorithm.

Paper Details

Date Published: 10 October 2013
PDF: 9 pages
Proc. SPIE 8916, Sixth International Symposium on Precision Mechanical Measurements, 891619 (10 October 2013); doi: 10.1117/12.2035814
Show Author Affiliations
Shaoqiong Wang, Beijing Information Science & Technology Univ. (China)
Bixi Yan, Beijing Information Science & Technology Univ. (China)
Mingli Dong, Beijing Information Science & Technology Univ. (China)
Jun Wang, Beijing Information Science & Technology Univ. (China)
Peng Sun, Beijing Information Science & Technology Univ. (China)


Published in SPIE Proceedings Vol. 8916:
Sixth International Symposium on Precision Mechanical Measurements
Shenghua Ye; Yetai Fei, Editor(s)

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