带有给定切线多边形的C2和C3 B&#233;zier闭样条曲线

带有给定切线多边形的C²和C³ Bézier闭样条曲线

摘要: 讨论与给定切线多边形相切的分段四次和五次Bézier曲线,所构造的曲线是C²和C³连续的,且对切线多边形是保形的.曲线上的所有Bézier曲线段的控制顶点由切线多边形的顶点直接计算产生.最后实例表明,本文的方法是有效的.

Abstract: Amethod of extracting eye and mouth features from facial images using deformable templates and genetic algorithms is described．It retains all advantages of the traditional deformable template approach and rectifies some of its weaknesses．Experimental results with some real images show the method has good performance and high speed．