利用求补色立体图屏幕坐标原理，采用浮动水平线法来绘出空间曲面的透视投影图形。
Based on the screen coordinate theory of solid diagram of complementary color, a perspective projection diagram of space surface is drawn using floating horizontal line method.
提出用控制自由曲面形状的数据点透视投影和曲面在数据点处的法矢进行自由曲面造型的新思想。
The results of planar parameters estimation are not accurate by traditional plane fitting methods to point clouds, because the gross error and outliers are not considered.
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