基于GPU的工业CT数据场三维纹理映射体绘制算法  

3D texture mapping based volume rendering algorithm of ICT data field on GPU

作　　者：胡剑[1] 王明泉[1] 侯慧玲[1] 郭永亮[1] 李士林[1] 

机构地区：[1]中北大学仪器科学与动态测试教育部重点实验室,太原030051

出　　处：《电子测试》2011年第5期5-9,共5页Electronic Test

基　　金：山西省青年科技研究基金(项目编号:2009021019-2)资助

摘　　要：本文提出的基于GPU的三维纹理映射算法通过编写顶点程序和片段程序,将传统的基于纹理面片的体绘制算法在GPU中实现。首先将体数据映射为三维纹理并将其载入到显存,接着通过对顶点着色程序和像素着色程序的编写将光线进入点、离开点的计算以及图像的合成运算移入GPU中,最后根据不同的采样点颜色混合公式实现不同的绘制效果。与传统的三维纹理映射算法相比,本文算法可快速绘制出质量较高的图像,使实时绘制工业CT断层图像成为了可能。The presented GPU-based 3D texture algorithm implement the traditional texture-based algorithm in GPU by writing vertex program and fragment program.First,the data sets and the transfer functions are transferred into the video as 3D textures.Then the entry-point and the leave-point of the ray and the compose of the ray are calculated by the vertex and the pixel shader.Finally,different rendering effects are achieved according to various blending functions of the sampling points.Compared with the traditional 3D texture mapping-based volume rendering algorithm,this algorithm is significantly fast and can meet the requirements of real-time interactive rendering of ICT slice Images.

关 键 词：三维纹理映射 图形处理器 纹理面片 直接体绘制 工业CT 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]