基于点约束的点云模型自由变形研究  

A Study of FFD of Point Cloud Model Based on Point Constraints

作　　者：李翔[1] 余玲玲[1] 刘京南[1] 杨安康[1] 

机构地区：[1]东南大学自动化学院江苏,南京210096

出　　处：《信息化研究》2014年第4期31-35,共5页INFORMATIZATION RESEARCH

摘　　要：自由变形技术是计算机图形学研究的热点问题之一。本文首先介绍基于点约束的变形技术,并将此应用于点云模型的自由变形中。然后介绍了高斯分布的相关特性,考虑到该算法变形基函数与高斯分布有类似性质,设计了一个阈值函数,结合该变形算法,将其应用到自由变形中,观察了其变形效果以及时间复杂性。通过试验,改进后的算法在保持变形效果的同时,计算时间明显减少。Technology of FFD has been one of the hot issues in computer graphics.This paper introduces the deformation technology based on point constraints,and applies it to on point cloud model.And then it introduces the relevant characteristics of the Gaussian function.Taking into account the similar properties between deformation basic function and the algorithm Gaussian basis function,this paper designs a threshold function.It is applied to the free deformation combined with deformation function.Testing the deformation effects,it reduces the calculation time significantly.

关 键 词：自由形式变形 点约束自由变形技术 变形基函数 高斯分布 阈值函数 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]