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。
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.
荷叶花边缘镶上白边，与黑色形成一种对比，一种跳跃感觉。，犹如琴键上跳动音符。
Lotus leaf edges with white flowers, and black form a contrast, have a kind of bouncing feeling. Like on those keys jumpy note.
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