体视化中LOD技术思想的应用与实现  

Application and realization of level of detail techniques for volume visualization

作　　者：陈慧[1] 何兴恒[1] 

机构地区：[1]中国地质大学(武汉)计算机学院,湖北武汉430074

出　　处：《计算机工程与设计》2008年第22期5860-5862,5865,共4页Computer Engineering and Design

摘　　要：在真实感图形学研究中,复杂模型的实时绘制与动态显示是研究的热点之一。细节层次是实时图形生成的一项重要技术。细节层次模型是指对同一个场景或场景中的物体,使用具有不同细节的方法得到一组模型,供绘制时使用。建立细节层次模型能很有效地降低数据量和复杂度,实现三维场景的实时处理。针对光线投射绘制算法图像质量高,但是速度较慢的特点,提出将LOD技术思想引入到光线投射算法以改善图像体绘制时的交互性能,该方法为以后在地形可视化、虚拟现实等领域的应用提供了理论依据。In the study of the realistic graphics, the complex model of real-time rendering and dynamic display has been a hot one. Details of the level are an important technology of real-time graphics generated. Level of model means to create models with different details in the same scene, and uses them while drawing. Creating models at multiple level of detail can effectively reduce data amount and complexity and realize real-time processing of the three-dimensional scene. Owing to the problem that the ray casting algorithm has high image quality and more slow velocity, the thought is provided to introduce the LOD technique into the ray casting volume-rendering algorithm in order to improve the interactive function in drawing volume-rendering image. This will offer the theoretical foundation to the future studies.

关 键 词：层次细节简化 体绘制 三维可视化 光线投射算法 稀疏采样 

分 类 号：TP317.4[自动化与计算机技术—计算机软件与理论]