Multi-circle fitting algorithms for laser spot location
Yi Qin · Journal of Xi'an University of Science and Technology · 2006
The surface fitting algorithm and circle fitting algorithm available for getting laser spot parameters are discussed.Based on circles fitting of laser spot shape the newly multi-circle fitting algorithm is proposed,and the precisions of multi-circles fitting algorithm and surface fitting algorithm under different noise level are compared.According to the research,the multi-circle fitting algorithm has better performance of anti-noise.The multi-circle fitting algorithm can detect not only the spot center but also spot which the radius is on sub-pixel level.So the multi-circle fitting algorithm can be used in the optical measurement systems.