20 May 2009 A new algorithm to locate the laser spot center at a sub-pixel level
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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.
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Ruifang Ye, Ruifang Ye, Chun Lin, Chun Lin, Zhenheng Lin, Zhenheng Lin, Xizhao Lu, Xizhao Lu, Xiaolan Chu, Xiaolan Chu, Yuanqing Huang, 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); doi: 10.1117/12.830887; https://doi.org/10.1117/12.830887
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