一种基于体绘制的二元变量体可视化方法  

A Volume Visualization Method for Binary Variables Based on Volume Rendering

作　　者：李霖[1] 曾祥倚 段新桥[1] 朱海红[1] 张一鸣[2] LI Lin ZENG Xiangyi DUAN Xinqiao ZHU Haihong ZHANG Yiming(School of Resource and Environmenal Sciences,Wuhan University, Wuhan 430079, China The No. 28 Research Institute of China Electronics Technology Group Corporation, Nanjing 210007, China)

机构地区：[1]武汉大学资源与环境科学学院,湖北武汉430079 [2]中国电子科技集团公司第二十八研究所,江苏南京210007

出　　处：《武汉大学学报（信息科学版）》2017年第8期1082-1089,共8页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金(41271458);科技部科技支撑项目(2012BAB16B01)~~

摘　　要：二元变量的体可视化是探索多维多变量复杂空间可视化的基础。基于体绘制技术原理,将两种不同变量分别映射为颜色和不透明度。为避免颜色和不透明度相互影响,提出一种借助纹理采样的不透明度映射方法。该方法可同时直观地反映两种变量的空间分布特征及其相互关系。采用多个海域的温盐数据进行实验分析,结果表明该方法较好地展示了这些海域温盐的整体分布特征和相互关系,为二元变量的体可视化探索提供了支持。The study of volume visualization technique for binary variables are the basis of exploring the multi-dimensional and multivariate space visualization.Based on the principle of volume rendering,we map one variable to color and the other to opacity.To prevent the mutual interference of color and opacity,this paper proposes an opacity mapping method utilizing texture sampling.The spatial distribution and relationship of two variables can be observed directly and simultaneously with this method.The proposed method is validated on the temperature and salinity datasets of several seas.Experimental results show that this visualization method can effectively demonstrate the overall distribution features and relationship of the temperature and salinity and facilitate the volume visualization exploration for binary variables.

关 键 词：二元变量 可视化探索 体绘制 纹理采样 温盐数据 

分 类 号：P208[天文地球—地图制图学与地理信息工程]