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特征多边形的
相关语句
  characteristic polygon
    The polygon is employed to present the aircraft contour approximately, and the aircraft can be recognized by recognizing the characteristic polygon.
    该方法用多边形近似代替已提取出的飞机边缘轮廓,通过对该特征多边形的识别从而达到对飞机的识别。
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  “特征多边形的”译为未确定词的双语例句
    Through a parameterization to the control polygons of 3D Rational Bezier curves,the approximative degree of the series of degree elevation polygons to their curves is presented, the uniform convengence property is obtained further.
    本文通过对空间参数有理Bezier曲线的特征多边形的参数化,推得升阶多边形序列对曲线的逼近程度,进而得到一致收敛性。
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    This paper gives an utility technique of defining cubic rational B-splines curves with parameter through computing vertexes of control polygon and gives a application example to explain how to use the technique in CAGD.
    本文给出了一种利用给出的型值点反求参数有理三次B校条曲线特征多边形的顶点,进而求出通过给定型值点的参数有理三次B样条曲线的技术.并对在计算机辅助几何设计(CAGD)中如何应用此技术给出了举例说明.
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In this paper,on the basis of analysing several algorithms for interpolation with B-SPLINE which is current in surform cubic B-SPLINE is presented,whose essentials are that supplementary bounday conditions are regarded as a real reflect of variable tendency of comtrol polygon, and both end points are regarded as a linear combination of abjacent points. By means of this algorithm, taking suitable linear combinatorial coefficient, the con- tinuity of curvature on end point is guaranteed. Mianwhile, this algorithm...

In this paper,on the basis of analysing several algorithms for interpolation with B-SPLINE which is current in surform cubic B-SPLINE is presented,whose essentials are that supplementary bounday conditions are regarded as a real reflect of variable tendency of comtrol polygon, and both end points are regarded as a linear combination of abjacent points. By means of this algorithm, taking suitable linear combinatorial coefficient, the con- tinuity of curvature on end point is guaranteed. Mianwhile, this algorithm is easlly extended to the interpolation of the surfaces with uniform bicubic B-SPLINE. It is very conventent and efficient to rse this alorithm in sruface mkdelling. Above all, for surface of revolution,is is evident that algorthm which is presented is this papar has the advantage over others.

本文分析了在自由曲面构型中,目前流行的几种B-Spline反求算法的特点及不足之处,提出了在均匀三次B-Spline反求中,使补充边界条件作为特征多边形局部变化趋势的一个良好反映,将补充端点作为邻近点的一个线性组合的方法。用这个反求方法构造自由曲线,只要取合适的线性组合系数,可使端点曲率不为零,这就克服了重顶点时,曲线端点恒为零的缺点,从而保证端点由率的连续性。同时可根据需要,在曲线的第一段(或最末一段)产生或消除拐点。算法的另一个优点是可将曲线的反求方便地推广到曲面的反求。该算法在自由曲面构型中非常方便,尤其对于生成各种回转体和“伪回转体”(例如军用水壶等等)的自由曲面,特别奏效。

The Bezier and B-Spline functions are taken for designing curves and surfaces in this paper. This method is takenfor designing modelling solids by computer-aided. Using the localcontrol nature of the curve shape, the user can move the vertexof characteristic polygon to modify the surface shape he needs.Changing viewing parameters, the user will obtain various pers-pective and parallel projectiv views as required.

本文采用Bezier和B-Spline函数进行曲线和曲面设计,并将此法用于计算机辅助立体造型.设计过程中,利用曲线局部调节特性,用户可改动特征多边形顶点的位置,以改变曲面的轮廓外形,直到满意为止.在改变观察参数的情况下用户可得到所需的各种透视图和轴测图.

In this paper,presented are the general matrix formulae to determine the control vertices of anew kind of EB-spline curve/surface in many boundary conditions.Also discussed is the influenceof the vertices in a straight line and the ones in coincidence on the shape of the EB-spline curve intwo more useful casses(k=0 and k=1/8).The results obtained in the paper show that the spe-cial need of complex shape design for curves surfaces can be satisfacted in practical application ifthe vertices in a straight line and...

In this paper,presented are the general matrix formulae to determine the control vertices of anew kind of EB-spline curve/surface in many boundary conditions.Also discussed is the influenceof the vertices in a straight line and the ones in coincidence on the shape of the EB-spline curve intwo more useful casses(k=0 and k=1/8).The results obtained in the paper show that the spe-cial need of complex shape design for curves surfaces can be satisfacted in practical application ifthe vertices in a straight line and the ones in coincidence are properly chosen。

本文给出了一种新的EB样条曲线、曲面在各种边界条件下的反算矩阵通式;并且讨论了特征多边形顶点共线和重顶点对两种较常用(即k=0和k=1/8时)的EB样条曲线形状变化的影响。其结果表明,适当迭取顶点共线和重顶点能使EB样条曲线、曲面满足实际应用中复杂外形设计对曲线、曲面的特殊要求。

 
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