在体场景图中结合点云和体对象

Min Chen
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引用次数: 9

摘要

本文描述了构造体几何(CVG)技术框架的一种扩展,以适应体场景图中的点云。它引入了基于点的体积对象(PBVO)的概念,其特征在于点云的不透明度,而不是几何形状。研究并比较了几种用于从点云构造标量场的径向基函数(rbf),其中包括本文提出的径向基函数。它将基本的CVG算子应用于pbvo,并演示了pbvo与常规体积对象(包括程序定义对象和从体积数据集构建的对象)的互操作性。提出了一种基于八叉树的算法来降低绘制具有大量点的PBVO的复杂性,并通过一组测试结果表明,当使用八叉树来绘制PBVO时,具有显着的加速效果。
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Combining point clouds and volume objects in volume scene graphs
This paper describes an extension to the technical framework of constructive volume geometry (CVG) in order to accommodate point clouds in volume scene graphs. It introduces the notion of point-based volume object (PBVO) that is characterized by the opacity, rather than the geometry, of a point cloud. It examines and compares several radial basis functions (RBFs), including the one proposed in this paper, for constructing scalar fields from point clouds. It applies basic CVG operators to PBVOs and demonstrates the inter-operability of PBVOs with conventional volume objects including those procedurally defined and those constructed from volume datasets. It presents an octree-based algorithm for reducing the complexity in rendering a PBVO with a large number of points, and a set of testing results showing a significant speedup when an octree is deployed for rendering PBVOs.
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