Accuracy of measurement of face runout is enhanced effectually by use of least square method of compressing rectangle fitting edge of image and transforming of DFT.
用压缩矩形的最小二乘法拟合工件端面图像的边缘以及用DFT变换对工件端面的跳动量进行测量，使端面跳动测量的准确性得到了很大的提高。
In this paper, a method about contour extraction of regular targets in images is proposed, which is based on an improved rectangle fitting method and a polygon fitting method.
采用多边形拟合物体图象边缘轮廓线，即实现从图象到图形的转换的方法，与直接记录原图象数据相比可大大减少轮廓线上所需记录的边缘点的个数，即减少数据量。
It is found that initial quantum yield obtained by fitting rectangle hyperbola is higher than its real value.
指出在田间条件下，用直角双曲线拟合得到的初始量子效率偏高。
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