| 基于高斯拟合的激光光斑中心定位算法 |
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| 引用本文： | 王丽丽,胡中文,季杭馨.基于高斯拟合的激光光斑中心定位算法[J].应用光学,2012,33(5):985-990. |
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| 作者姓名： | 王丽丽 胡中文 季杭馨 |
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| 作者单位： | 1.中国科学院国家天文台 南京天文光学技术研究所,江苏 南京 210042; |
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| 基金项目： | 国家自然科学基金(10873023);国家自然科学青年基金(11103053) |
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| 摘 要： | 激光光斑中心定位是光学测量中的关键技术之一。通过对常用定位算法的分析，给出利用光斑图像中的不饱和点对光斑进行高斯拟合，并以拟合函数的幅值点作为光斑中心的方法。利用人工光斑对该算法进行验证，结果表明该算法误差远小于0.1 像素；利用一维高精度电动平移台、CCD相机、激光器等搭建测试系统，由计算机自动采集激光光斑图像并对其进行分析，实验结果表明该算法与理论分析结果的均方根误差仅为0.1 像素。
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| 关 键 词： | 光学测量 高斯拟合 光斑中心 不饱和点 |
| 收稿时间： | 2012/3/22 |
Laser spot center location algorithm based on Gaussian fitting |
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| WANG Li-li
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HU Zhong-wen
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JI Hang-xin.Laser spot center location algorithm based on Gaussian fitting[J].Journal of Applied Optics,2012,33(5):985-990. |
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| Authors: | WANG Li-li HU Zhong-wen JI Hang-xin |
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| Affiliation: | 1.Nanjing Institute of Astronomical Optics &Technology National Astronomical Observatories,CAS,Nanjing 210042,China;2.Graduate University of Chinese Academy of Sciences,Beijing 100049,China |
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| Abstract: | Laser spot center location is a key technique in the field of optical measurement. Based on the analysis of algorithms commonly used, a Gaussian fitting based laser spot center location method was presented. The unsaturated part of laser spot image was used to fit the Gaussian surface, based on which the amplitude of the fitting function could be looked upon as the laser spot center. In order to verify this algorithm, an artificial light spot was used firstly, experimental results showed that the error of this algorithm was much less than 0.1 pixels; and then a measuring system which mainly consisted of high precision motorized translation stage of one dimension, CCD camera and laser was constructed, the acquisition and analysis of laser spot image were accomplished by computer automatically, experimental results showed that the root mean square error between the algorithm and theoretical analysis was only 0.1 pixels, which had high accuracy. |
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| Keywords: | optical measurement Gaussian fitting laser spot center unsaturated point |
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