体素分类与Phong光照模型GPU加速体绘制  

Volume classification and GPU-accelerated volume rendering of Phong optical model

作　　者：马国军[1] 

机构地区：[1]江苏科技大学电子信息学院,江苏镇江212003

出　　处：《计算机工程与设计》2010年第7期1529-1532,共4页Computer Engineering and Design

基　　金：江苏省科技厅社会发展基金项目(2005DX015J)

摘　　要：为了提高体绘制的速度和效果,研究了体数据的分类和计算及其在图形处理单元上加速实现的体绘制算法。分别采用点体素先分类和预积分后分类方法为体数据分配颜色和不透明度,改进了利用不透明度对颜色加权改善绘制效果,根据Phong光照模型对体数据进行渲染。通过查找表软件加速和图形处理单元硬件加速两个方面分别实现并进行比较,实验结果表明,采用图形硬件加速的方法达到实时交互的效果,体绘制性能大大提高。To improve speed and effect of volume rendering,volume data classification and calculation of volume rendering on graphic processing unit（GPU） is studied.Firstly,point-based and pre-integrated classification are applied relatively,it allocated color and opacity for every volume data and color interpolated with opacity-weight in order to improve rendering effect,then volume data are ren-dered with Phong optical model.At the same time software acceleration with look up table and graphic hardware acceleration are imple-mented and compared,the experiment results show that GPU-based acceleration method achieves real-time interactive effect and improves performance of volume rendering.

关 键 词：图形处理单元 体绘制 预积分 体素分类 PHONG光照模型 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]