几何重心法亚像素提取算法研究

doi:10.3969/j.issn.1000-1158.2020.02.11

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Abstract To achieve the ultra-low rotating speed online measurement, a geometric center of gravity subpixel extraction algorithm based on microscopic image was proposed.Firstly, the measurement of ultra-low rotation speed was transformed into translational measurement according to the microscopic image method,the surface fitting method and gradient method which are commonly used at presentnot only take longer to extract sub-pixel but also have weak anti interference ability, thesub-pixel extraction algorithm of the geometric center of gravity method solved these problems.The core of the geometric center of gravity method was to calculate the index value of the difference between the reference pixel gray value and the integer pixel gray value within the range of 3×3 pixel on the basis of the integer pixel extraction, then extracted the sub-pixel value from the acquired 3-point index value by using the geometric center of gravity method.Through the verification of micro-displacement captured images by grating reference platform, the average time of geometric center of gravity method was less than 0.2s, which was shorter than the surface fitting method and the gradient method.The standard deviation of the extract subpixel value was less than one thousandth of a pixel, which conformed to the basic requirements of ultra-low rotating speed online measurement.

Key words： metrology ultra-low rotating speed detection geometric center of gravity method sub-pixel microscopic image

Received: 01 August 2018 Published: 17 February 2020

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TB934

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	Articles by authors
	XU Cong-yu
	GAO Yu-ting
	XU Jun
	YANG Ya-ru
	HU Zong-jiu

Cite this article:

XU Cong-yu,GAO Yu-ting,XU Jun, et al. Research on Sub-pixel Extraction Algorithm of Geometric Center of Gravity Method[J]. Acta Metrologica Sinica, 2020, 41(2): 190-197.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2020.02.11 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2020/V41/I2/190

［1］宿诺, 鲁明, 翟百臣, 等. 基于跟踪微分器的CMG框架超低速测速方法研究［J］.中国空间科学技术, 2017, 37(3): 126-131.
Su N, Lu M, Zhai B C, et al. Research on ultra-low speed measurement for CMG gimbal based on tracking-differentiator［J］. Chinese Space Science and Technology, 2017, 37(3): 126-131.
［2］王峰, 张波, 丘东元. 交流电机的虚拟光电编码盘测速技术［J］.中国电机工程学报, 2005,25(6): 102-106.
Wang F, Zhang B, Qiu D Y. The virtual optical encoder technique in AC motors［J］. Proceedings of the CSEE, 2005,25(6): 102-106.
［3］Jiang K S, Xu G H, Tao T F, et al. A simple and reliable sensor for accurate measurement of angular speed for low speed rotating machinery［J］. Review of Scientific Instruments, 2014, 85(1): 2585-170.
［4］Arif S J, Asghar M S J, Imdadullah A. Very Fast Measurement of Low Speed of Rotating Machines Using Rotating Magnetic Field［J］. IEEE Transactions on Instrumentation & Measurement, 2012, 61(3): 759-766.
［5］王明元, 余海盛, 杨连春, 等. 一种超低速转台速率指标的测量方法［J］.宇航计测技术, 2013, 33(4): 21-23.
Wang M Y, Yu H S, Yang L C, et al. Measurement Method of An Ultra-Low-Speed Turntables Rate Index ［J］. Journal of Astronautic Metrology and Measurement, 2013, 33(4): 21-23.
［6］鲁明, 李耀华, 张激扬, 等. 控制力矩陀螺框架伺服系统的超低速测速方法［J］.中国惯性技术学报, 2012, 20(2): 234-23.
Lu M, Li Y H, Zhang J Y, et al. Ultra-low speed detection method for CMG gimbal servo systems ［J］. Journal of Chinese Inertial Technology, 2012, 20(2): 234-23.
［7］彭可, 彭年香, 陈燕红. 一种基于视频处理技术的转速测量方法［J］.计算技术自动化, 2010, 29(1): 76-79,94.
Peng K, Peng N X, Chen Y H. A Measuring Method for Rotational Speed Based on Video Processing Technique［J］. Computing Technologyand Automation, 2010, 29(1): 76-79,94.
［8］杨新锋, 田广强, 路新华. 基于智能视觉分析无人机发动机转速测量方法［J］. 计算机仿真, 2015, 32(9): 72-74.
Yang X F, Tian G Q, Lu X H. Engine Speed Measurement Method for Unmanned Aerial Vehicle(UAV) Based on Intelligent Vision Analysis［J］. Computer Simulation, 2015, 32(9): 72-74.
［9］赵盟, 赵翠莲, 范志坚, 等. 基于图像处理的瞬态转速测量方法［J］. 计算机测量与控制, 2014, 22(1): 16-18.
Zhao M, Zhao C L, Fan Z J, et al. A Method of Transient Rotaticv Speed Measurement Based on Image Processing［J］. Computer Measurement & Control, 2014, 22(1): 16-18.
［10］祝晓东, 郁松年. 利用非高速摄像机测量转速的方法研究［J］. 计算机测量与控制, 2012, 20(1): 53-55.
Zhu X D, Yu S N. Researching of the Method of Measuring Angle Velocity Based on Non—High Video Camera［J］. Computer Measurement & Control, 2012, 20(1): 53-55.
［11］潘兵, 续伯钦, 陈丁, 等. 数字图像相关中亚像素位移测量的曲面拟合法［J］. 计量学报, 2005,26(2): 128-134.
Pan B, Xu B Q, Chen D, et al. Sub—pixel Registration Using Quadratic Surface Fitting in Digital Image Correlation［J］. ActaMetrologica Sinica, 2005,26(2): 128-134.
［12］资新运, 耿帅, 赵姝帆, 等. 3种亚像素位移测量算法的比较研究［J］. 计量学报, 2015, 36(3): 260-267.
Zi X Y, Geng S, Zhao S F, et al. Comparison of Three Sub-pixel Displacement Algorithm［J］. Acta Metrologica Sinica, 2015, 36(3): 260-267.