光学学报, 2008, 28 (7): 1318, 网络出版: 2008-07-04
质心检测不确定度的估计方法
Uncertainty Evaluation of Centroid Detection
光学测量 不确定度 估计 像素强度 质心检测 optical measurement uncertainty evaluation pixel intensity centroid detection
摘要
提出了一种估计质心检测不确定度的新方法,首先由像素强度和像素所在位置的图像梯度估计像素强度的不确定度,然后由像素强度不确定度的估计值和像素之间的相关性确定质心检测的不确定度。给出了估计像素强度不确定度的数学模型和估计质心检测不确定度的解析表达式。实验结果表明,用该方法能准确地估计质心检测结果的不确定度。
Abstract
A new method of uncertainty evaluation of centroid detection is proposed. The uncertainty associated with the intensity of a pixel, belonging to the target to be detected, is firstly evaluated from the pixel intensity and the image gradient at the pixel. Then the uncertainties associated with the centroid detector are evaluated according to the relation between the evaluation of pixel intensity uncertainty and the pixel. The mathematical model to evaluate the uncertainty of pixel intensity and the analytical expression to evaluate the uncertainty of centroid detection are presented. The experimental results show that the uncertainty of centroid detection can be evaluated accurately with this method.
陈杰春, 丁振良, 袁峰. 质心检测不确定度的估计方法[J]. 光学学报, 2008, 28(7): 1318. Chen Jiechun, Ding Zhenliang, Yuan Feng. Uncertainty Evaluation of Centroid Detection[J]. Acta Optica Sinica, 2008, 28(7): 1318.