Algorithm of semicircular laser spot detection based on circle fitting

Zhengzhou Wang; Ruihua Xu; Bingliang Hu

doi:10.1117/12.2030791

19 July 2013 Algorithm of semicircular laser spot detection based on circle fitting

Zhengzhou Wang, Ruihua Xu, Bingliang Hu

Proceedings Volume 8878, Fifth International Conference on Digital Image Processing (ICDIP 2013); 88782Z (2013) https://doi.org/10.1117/12.2030791
Event: Fifth International Conference on Digital Image Processing, 2013, Beijing, China

Abstract

In order to obtain the exact center of an asymmetrical and semicircular aperture laser spot, a method for laser spot detection method based on circle fitting was proposed in this paper, threshold of laser spot image was segmented by the method of gray morphology algorithm, rough edge of laser spot was detected in both vertical and horizontal direction, short arcs and isolated edge points were deleted by contour growing, the best circle contour was obtained by iterative fitting and the final standard round was fitted in the end. The experimental results show that the precision of the method is obviously better than the gravity model method being used in the traditional large laser automatic alignment system. The accuracy of the method to achieve asymmetrical and semicircular laser spot center meets the requirements of the system.

Citation Download Citation

Zhengzhou Wang, Ruihua Xu, and Bingliang Hu "Algorithm of semicircular laser spot detection based on circle fitting", Proc. SPIE 8878, Fifth International Conference on Digital Image Processing (ICDIP 2013), 88782Z (19 July 2013); https://doi.org/10.1117/12.2030791

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