Characteristic points can be extracted by considering the geometry definition, the position and curvature of each point on the contours.

然后根据特征点的几何定义，利用轮廓线的位置、曲率等信息自动提取特征点。

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Lastly, the characteristic points can be extracted by the geometry definition of them and the position and curvature of each point on the contours.

根据特征点的几何定义，利用轮廓线的位置信息、曲率等属性来提取特征点。

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In this paper, analytic geometry is drawn into drilling hole position calculation and have the aid of computer, the calculation is accurate.

本文引入解析几何，借助计算机对钻孔位置进行较精确计算。

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He starts by building and painting the all-important frame, whose geometry determines that the seat, handlebars and pedals are in the correct position for each cyclist and the sort of riding they do.

BBC: How to build a bike: The revival of a British craft