Improved Least Square Algorithm and Application in Ellipse Fitting
MA Xiangna · Journal of Henan University of Science & Technology · 2014
A sub-pixel edge detection ellipse fitting algorithm to improve least squares algorithm was proposed.Firstly,the quasi-elliptic which met the requirements was translated into the normalized coordinate system.Secondly,the least squares method was used to fit ellipse with sub-pixel. Finally,the set of points was fitted by quadratic curve and the sub-pixel geometric center was solved. In a given graphic,the fitting uncertainty and precision are improved with the improved sub-pixel edge detection algorithm.