在立体视觉的激光扫描测量系统中，物体的空间坐标与计算机图像坐标之间存在着复杂的非线性映射关系。

There is complex nonlinear mapping between the object space and image space in the 3d machine vision metrology.

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在计算机视觉和图像处理中，经常需要根据圆孔或圆弧的图像求取其中心坐标和半径等特征参数。

In the filed of computer vision and image processing, the characteristic parameters such as the center coordinates and radius of circle and arc parts often need to be measured by their images.

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将图像转换为矢量图形，由计算机提取图形节点坐标形成二维点集矩阵。

The image is converted into vector and sketch node coordinate is withdrawn automatically by computer, two dimension the point gather the matrix is formed.

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