一种三维图像几何模型的构造方法  

A METHOD OF CONSTRUCTION OF 3D GEOMETRIC MODELS

作　　者：韩超[1] 吕维雪[1] 

机构地区：[1]浙江大学CAD&CG国家重点实验室,生物医学工程研究所,杭州310027

出　　处：《中国生物医学工程学报》2001年第5期404-409,共6页Chinese Journal of Biomedical Engineering

基　　金：浙江大学CAD&CG国家重点实验室资助

摘　　要：本文提出了一种直接从三维体数据图像建立物体表面几何模型的新方法。该方法直接利用三维图像偏微分计算边缘的曲率 ,并根据曲率的特性 ,选取表面的顶点。该方法的优点是被选取出的物体表面顶点充分代表了表面特性 ,保持了物体表面的拓扑结构及表面的不连续方向。另外 ,本方法实现规范 ,参数选择简单 ,针对不同的应用环境及计算机能力 。We presentsed a new method to construct surface geometric model from volume images. The vertices of geometric model on the surface of object was chosen according to the curvatures which was computed directly from partial derivation of volume image. Because the chosen vertices represented the geometric character of 3D surface, the method could fully preserve the topology of the object as well as the surface orientation discontinuities. In addition, its realization was compact and simple. According to application and computing hardware, the resolution of surface geometric models could be flexibly defined.

关 键 词：曲率 B样条平滑 缝补 几何模型 

分 类 号：R311[医药卫生—基础医学] R319