线素二次曲线计算方法的研究

Study of the computational methods of Line element conic curve

从实际计算的角度出发,使用N矢量表示视平面上的点和直线,并由线素二次曲线的射影定义推导出线素二次曲线的N矢量方程;在此基础上,给出了射影平面上任意一条直线所确定的线素二次曲线切点的N矢量的计算方法。举例及验证表明,该算法实用、可靠。

A N - vector equation of line element conic curve derived from its projective definition is proposed from the perspective of computational process in this paper if all points and lines on the image plane are represented in terms of N - vectors. The computational methods of line element conic curve＇s tangent point decided by any line on projective plane is presented on the basis of this study. The result of example shows that this algorithm is more useful and reliable than traditional algorithms.