| 改进的光线投射法 |
| |
| 引用本文： | 钱鹰,张翔,赖均.改进的光线投射法[J].计算机工程与设计,2011,32(11):3780-3783. |
| |
| 作者姓名： | 钱鹰 张翔 赖均 |
| |
| 作者单位： | 1. 重庆邮电大学软件学院,重庆,400065
2. 重庆邮电大学计算机学院,重庆,400065 |
| |
| 基金项目： | 重庆邮电大学自然科学基金项目 |
| |
| 摘 要： | 采用光线投射法对连续CT图片进行三维重建,针对传统的光线投射法采样点计算量大,难以实现交互的问题,在采样过程中,利用平行投射直线之间的空间递推关系,提出了快速计算射线与平面集合的交点的算法,加快采样点的获取速度,实现重建速度上的提高。针对光线计算重复的问题,采用简化后的Phong光照模型,使得最后重建的显示效果更加理想。通过一台带有独立显卡的PC机,实现了改进后的算法,验证了该算法的实际效用。
|
| 关 键 词： | 三维重建 光线投射法 采样点 体素 三线性插值 Phong光照模型 |
Improved ray casting algorithm |
| |
| QIAN Ying,ZHANG Xiang,LAI Jun.Improved ray casting algorithm[J].Computer Engineering and Design,2011,32(11):3780-3783. |
| |
| Authors: | QIAN Ying ZHANG Xiang LAI Jun |
| |
| Affiliation: | QIAN Ying1,ZHANG Xiang2,LAI Jun2(1.College of Software,Chongqing University of Posts and Telecommunications,Chongqing 400065,China,2.College of Computer Science,China) |
| |
| Abstract: | Ray casting algorithm is adapted to reconstruct the continuous CT images to three-dimensional.Aimed at the shortcoming that computation of traditional sampling-points method is overlarge and hardly to interact,an algorithm that takes advantage of the re-currence relation of parallel projection line during the sampling process is presented to improve the speed of obtaining the sampling-points and the speed of reconstruction.To avoid the reiteration of ray calculation,a simplified Phong illumination model is ... |
| |
| Keywords: | three-dimensional reconstruction ray casting sampling-point volume trilinear interpolation Phong illumination model |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
