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Proceedings Paper

A new algorithm to locate the laser spot center at a sub-pixel level
Author(s): Ruifang Ye; Chun Lin; Zhenheng Lin; Xizhao Lu; Xiaolan Chu; Yuanqing Huang
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Paper Abstract

Laser is widely used in processing and measurement because of its fine directivity and concentrated energy. The quality of processing and measurement are mostly determined by the location of laser spot. However, it is difficult to locate its center. A new algorithm, based on Hough Transform and sub-pixel methods, is proposed to locate laser spot center at a sub-pixel level. In this algorithm, Hough Transform is utilized to detect the profile, center and radius of circle spot at a pixel level, and the centroid method and curve fitting method are utilized to locate the center to sub-pixel level. Simulation and experimental results show that the algorithm offers great accuracy in position locating for laser spot. This method can be used in laser processing and measuring system.

Paper Details

Date Published: 20 May 2009
PDF: 6 pages
Proc. SPIE 7282, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 72821T (20 May 2009); doi: 10.1117/12.830887
Show Author Affiliations
Ruifang Ye, Xiamen Univ. (China)
Chun Lin, Xiamen Univ. (China)
Zhenheng Lin, Putian College (China)
Xiamen Univ. (China)
Xizhao Lu, Xiamen Univ. (China)
Xiaolan Chu, Xiamen Univ. (China)
Yuanqing Huang, Xiamen Univ. (China)


Published in SPIE Proceedings Vol. 7282:
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Li Yang; John M. Schoen; Yoshiharu Namba; Shengyi Li, Editor(s)

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