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。
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.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2008年第7期1318-1322,共5页
Acta Optica Sinica
关键词
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
