图像识别在静电场描绘实验中的应用
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摘要
在静电场描绘实验中,由于实验得到的电势点较多,对实验数据评价较为不便,为此,设计了利用OpenCV的函数获取图中所有电势点的坐标,经过计算即可得到各等势圆半径的测量值,再计算出相对偏差,既可以给出图形的整体评分.
The experiment of depicting electrostatic field produces a paper with lots of dots in it,which is inconvenient for teachers to evaluate the students' operation.A computer program was developed with OpenCV in this paper.The coordinates of all dots in the picture were got with OpenCV's functions.The radiuses of every equipotential circle could be computed.Using the measured value and the theoretical value of the radius of every equipotential circle,the relative errors were computed.Finally,the grade of the picture could be given.
The experiment of depicting electrostatic field produces a paper with lots of dots in it,which is inconvenient for teachers to evaluate the students' operation.A computer program was developed with OpenCV in this paper.The coordinates of all dots in the picture were got with OpenCV's functions.The radiuses of every equipotential circle could be computed.Using the measured value and the theoretical value of the radius of every equipotential circle,the relative errors were computed.Finally,the grade of the picture could be given.
引文
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[3]OpenCV.AI Courses by OpenCV[EB/OL].https://opencv.org/.2019-03-10.
[4]张铮.数字图像处理与机器视觉---Visual C++与MATLAB实现[M].北京:人民邮电出版社,2010:287-288,338-340.
[5]OpenCV.Color Space Conversions[EB/OL].https://docs.opencv.org/4.0.0/d8/d01/group__imgproc__color__conversions.html#ga397ae87e1288a81d2363b61574eb8cab.2019-03-10.
[6]OpenCV.Feature Detection[EB/OL].https://docs.opencv.org/4.0.0/dd/d1a/group__imgproc__feature.html#ga04723e007ed888ddf11d9ba04e2232de.2019-03-10.
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[9]赵黎,王丰.大学物理实验[M].北京:北京大学出版社,2018:81-87.
[10]刘雅彬,鲁晓东.MATLAB对静电场等势线的最小二乘描绘[J].大学物理实验,2013,26(2):82-84.