基于深度的光线投影体绘制算法  

DEPTH BASED RAY-CASTING VOLUME RENDERING

作　　者：罗晖[1] 吴百锋[1] 孙晓光[1] 

机构地区：[1]复旦大学计算机与信息技术系,上海200433

出　　处：《计算机应用与软件》2008年第1期209-210,237,共3页Computer Applications and Software

摘　　要：针对特征信息抽取,在传统光线投影体绘制过程中引入深度参数,提出了一种基于深度的体绘制算法。通过深度及角度交互,指导特征信息及其上下文信息的绘制。该算法将采样点深度转换成相应深度强度值,按给定方法与已知透明度值合成,得到新透明度值。在此基础上再进行颜色值合成,生成图像。给出了结果,分析了采用算法前后的效果。The depth factor is added into the traditional ray-casting volume rendering process for feature extraction. The interaction based on depth and view direction guides the rendering of feature and its context information. The depth is transferred into depth intensity value,and with the combination of depth intensity value and opacity value, the new opacity value is attained. Then, the finally image is generated through color-opacity composition. The experimental result is presented, and the difference between the effects before and after the experiment is analyzed.

关 键 词：深度 合成 交互 体绘制 光线投影 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]