光学技术, 2015, 41 (1): 59, 网络出版: 2015-04-14
加门限的一阶矩光斑质心探测方法
First moment spot centroid detection with a threshold to compute the centroid
摘要
提出了加门限的滑动窗口一阶矩质心计算方法.在单帧图像内首先计算全局质心,并在全局质心处加上一定大小的窗口,在窗口内再次进行质心计算,判断相邻两次质心是否满足给定质心收敛条件,若不满足将窗口滑动到新的质心位置处,直至完全收敛.在不同的系统条件下,将滑动窗口一阶矩质心计算方法与传统的一阶矩方法在计算精度上进行了仿真及实验的比较.结果表明,滑动窗口一阶矩质心计算方法具有较高的计算精度,适合于高精度自适应光学系统中.
Abstract
First moment spot centroid calculation in a sliding window with a threshold is proposed.The global centroid is computed in the image first.At this center a certain size window is used,and then the centroid again is calculated.Whether the difference value of the two adjacent centroids meets the given centroid convergence condition is estimated,if not the window slides to the new centroid position and the centroid again is computed until convergent.Compare the method with the traditional first moment centroid calculation method under different system conditions on the calculation accuracy,the simulation and experiment results show that the method is of higher calculation accuracy which can be used in the high precision adaptive optics system.
张艳艳, 郝晓龙, 陈洁玮. 加门限的一阶矩光斑质心探测方法[J]. 光学技术, 2015, 41(1): 59. ZHANG Yanyan, HAO Xiaolong, CHEN Jiewei. First moment spot centroid detection with a threshold to compute the centroid[J]. Optical Technique, 2015, 41(1): 59.