A new algorithm to locate the laser spot center at a sub-pixel level

Ruifang Ye; Chun Lin; Zhenheng Lin; Xizhao Lu; Xiaolan Chu; Yuanqing Huang

doi:10.1117/12.830887

20 May 2009 A new algorithm to locate the laser spot center at a sub-pixel level

Ruifang Ye, Chun Lin, Zhenheng Lin, Xizhao Lu, Xiaolan Chu, Yuanqing Huang

Proceedings Volume 7282, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 72821T (2009) https://doi.org/10.1117/12.830887
Event: AOMATT 2008 - 4th International Symposium on Advanced Optical Manufacturing, 2008, Chengdu, Chengdu, China

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.

Citation Download Citation

Ruifang Ye, Chun Lin, Zhenheng Lin, Xizhao Lu, Xiaolan Chu, and Yuanqing Huang "A new algorithm to locate the laser spot center at a sub-pixel level", Proc. SPIE 7282, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 72821T (20 May 2009); https://doi.org/10.1117/12.830887

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