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球形窗口
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     The Window
     窗口
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     DESIGN FOR WINDOW COMPITER
     窗口程序设计
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     The research progress of spherical cotton cellulose
     球形棉纤维素的制备
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     Preparation of Spherical Silicon Dioxide Particles
     球形二氧化硅的制备
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  spherical window
The choice of a spherical window allows to have a full symmetry.
      
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This paper presents a moment-based method for three dimensional edge detection. By fitting a rotatory surface to a spherical window of image data and computing its zero to second order moments,the edge parameters (shape,location,strength and orientation)are estimated.For anisotropic data of three dimensional medical image,the moments is calculated directly using a set of masks by implying linear interpolation within moments calculation.The method is simple and the amount of calculation decreases greatly.

本文提出了一种基于矩的三维边界检测方法.在三维图象中取球形窗口,用旋转曲面拟合边界曲面,通过计算图象的零至二阶矩,从而获得边界的形状、位置、强度和方向等参数.对于非均匀的三维医学图象,得出了一组通用的,隐含线性插值过程的矩计算模板.可以直接从三维非均匀数据计算各阶矩,方法简便且计算量大为减少.

Geo-phenomena is essentially data field distributed in three dimension space.It is an important technique to analyze and simulates the distribution or mutative characteristic of three dimension geo-phenomena by spatial interpolation with limited sampling points.A three dimension interpolation method is discussed in this paper.The three dimension space is discredited into regular hexahedrons,and each vertex is taken as the interpolating point.At each interpolating point,a sphere with alterable radius is used...

Geo-phenomena is essentially data field distributed in three dimension space.It is an important technique to analyze and simulates the distribution or mutative characteristic of three dimension geo-phenomena by spatial interpolation with limited sampling points.A three dimension interpolation method is discussed in this paper.The three dimension space is discredited into regular hexahedrons,and each vertex is taken as the interpolating point.At each interpolating point,a sphere with alterable radius is used to search enough adjacent sampling points to interpolate the attribute of this point using weighted distance interpolation function.The practical realization and the example show that this method is effective and accords with the space distribution characteristics of geo-phenomenon.

地学现象本质上是分布于三维空间的数据场。利用有限的三维采样观测结果,通过三维空间内插是分析和模拟三维空间现象分布和变化特征的重要手段。本文利用规则六面体对三维空间进行离散,采用三维空间移动插值法,以六面体格网顶点为中心,以可变半径球形窗口搜索足够数量的邻近采样点,按距离权倒数内插函数计算待定点的属性。文中给出了该算法的具体实现以及插值结果的可视化表现,证明这种三维空间插值方法是行之有效的,且符合空间现象的空间分布特点。

 
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