A straight line fitting method is adopted in edge detection of one-dimension image in the linear CCD measuring system.
在线阵CCD测量系统中采用直线拟合方法检测一维图像边缘。
In the wafer notch detecting part, edge flexion method is adopted to find the notch range, then calculating the notch center by means of arc fitting.
缺口检测先采用边缘变化率算法查找缺口范围，再通过圆弧拟合的方法求出缺口中心位置。
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。
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