Extracting the centroid of the light spot by two-dimensional sigmoid fitting | |
Hui Zhang1,2,3; Guoping Li1,2; Yong Zhang1,2; Shouwei Hu1,2 | |
2018-10 | |
Source Publication | Optical Engineering |
Volume | 57Issue:10Pages:104113(1-7) |
Abstract |
Precise and stable centroid estimation is crucial for many tasks that require locating a light spot.We present an algorithm for fitting a deformed sigmoid function (two-dimensional sigmoid function) to the edge shape and profiled intensity of a light spot. The information of the spot (such as the center position,the size, and the tilt,) can be obtained by this fitting. The robustness of our proposal against noise, contrast,aspect ratio, and tilt is assessed compared with the adaptive circle–ellipse fitting and the centroid weighted Kalman filter algorithm, and the performance is validated experimentally. We show that our proposed algorithm provides better results than these algorithms, especially with regards to noise immunity. It is an effective and precise algorithm for estimating the centroid location of a light spot and can be used in a wide variety of optical sensing applications. |
Keyword | Centroid Estimation Subpixel Edge Detection Intensity Profile Fitting Optical Sensing |
Subject Area | 天文技术与方法 |
Language | 英语 |
Document Type | 期刊论文 |
Identifier | http://ir.niaot.ac.cn/handle/114a32/1546 |
Collection | 期刊论文 |
Affiliation | 1.南京天文光学技术研究所 2.天文光学技术重点实验室 3.中国科学院大学 |
Recommended Citation GB/T 7714 | Hui Zhang,Guoping Li,Yong Zhang,et al. Extracting the centroid of the light spot by two-dimensional sigmoid fitting[J]. Optical Engineering,2018,57(10):104113(1-7). |
APA | Hui Zhang,Guoping Li,Yong Zhang,&Shouwei Hu.(2018).Extracting the centroid of the light spot by two-dimensional sigmoid fitting.Optical Engineering,57(10),104113(1-7). |
MLA | Hui Zhang,et al."Extracting the centroid of the light spot by two-dimensional sigmoid fitting".Optical Engineering 57.10(2018):104113(1-7). |
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