光斑中心定位是光学测量中的关键技术之一, 检测算法的精度和速度直接影响了测量的精度及速度, 传统的检测算法如灰度质心法、Hough变换法等在检测精度或速度上存在不足。鉴于此, 提出了一种高精度光斑中心定位算法, 该算法不仅能定位光斑中心还能拟合出圆半径。用计算机生成的光斑和实验生成的光斑对该算法进行验证, 并与其他传统算法进行比较, 结果表明, 该算法的误差小于0.5像素且比其他经典算法更精确。

Light spot center location is one of the key technologies of optical measurement.The precision and speed of the detection algorithm affect those of the optical measurement system directly.The traditional algorithms such as gravity model and Hough transform are unsatisfactory under some conditions.This paper presents a high-precision light spot center location algorithm, which can not only locate the spot center but also fit the circle radius.Artificial light spot picture and experimental light spot picture are used to validate the algorithm.Other traditional algorithms are compared.The result shows the error is less than 0.5 pixels and more accurate than other traditional algorithms.