curve vector data compression 曲线矢量数据压缩
The drawing of data is mainly composed of the vector sign drawing and the curve drawing.
数据的绘制主要分为矢量符号绘制和曲线绘制。
In this paper, the control points are calculated based on the curve or surface's data points and the knot vector which is calculated with four kinds of parameterization by the method of NURBS.
文中根据曲线曲面型值点，分别用四种参数化方法构造节点矢量，利用NURBS方法反算控制点。
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