circle by center radius
圆心半径圆
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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.
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。
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