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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It put forward an effective new method to resolve the inverse position by using the conversion of coordinates and projection in analytic geometry, the method was simulated and verified by MATLAB.

运用解析几何中的坐标变换和投影，得出一种有效求解位置反解的新方法，通过MATLAB软件对该方法进行了仿真和验证。

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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