现代电子技术2016，Vol.39Issue(21)：56-60,5.DOI:10.16652/j.issn.1004-373x.2016.21.014
基于GPU加速的改进的光线投射算法研究
Study on improved ray casting algorithm based on GPU acceleration
摘要
Abstract
The traditional volume rendering algorithms of medical image are mostly realized with CPU. In order to solve the problems of long rendering time,poor interaction and single platform existing in traditional algorithms,a real-time volume ren-dering technology of medical sequence image based on graphics process unit (GPU) is put forward. With the technology,the threshold of opacity value is set to terminate the light ray early,and the sampling interval is adjusted while the light ray travers-ing the volume data to improve the ray casting algorithm. The experimental results show that the volume rendering time of a group biggest data including 931 slices is about 1.3 s,and the rending frame is among 20~40 while interacting. The rendering time is faster than that of the traditional algorithm based on CPU,and the speed-up ratio can reach to about 1.5.关键词
GPU/光线投射算法/体绘制/采样间距/不透明度值Key words
GPU/ray casting algorithm/volume rendering/sampling interval/opacity value分类
信息技术与安全科学引用本文复制引用
唐振禹,吕晓琪,任国印..基于GPU加速的改进的光线投射算法研究[J].现代电子技术,2016,39(21):56-60,5.基金项目
国家自然科学基金资助项目(61179019,61261028) （61179019,61261028）
内蒙古科技大学创新基金(2014QDL045) （2014QDL045）
