畸变系数可以通过在图像中绘图测量线来估计。
Distortion coefficients can be estimated by drawing measurement lines in the image.
每个测量线必须被放置在沿着一个图像里的直线，这条线应该是直线，但由于透镜畸变实际上是弯曲的。
Each measurement line must be placed along an image line that should be straight, but because of lens distortion is actually curved.
实际应用中，由于磨损和受热等原因，使得齿轮齿廓以及啮合过程中啮合线都发生了畸变。
The gear teeth and meshing line are distorted in the meshing process as a result of wearing and rise in temperature.
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