摘要
加速的体数据光线投射算法将光线在三维空间的采样问题看成光线的三维扫描转换问题．以层为基本的处理，避免了对三维体数据的随机检索．并且利用平行投影光线的方向都相同的特点，用查表快速实现了光线的三维扫描转换．该算法在微机上得到检验，它在重建时间和内存花费上都优于传统的实现方法．
An accelerated ray casting algorithm for volume data is presented in this paper.The problem for sampling along a 3D ray can be viewed as the problem of 3D scan conversion of a ray. Random access of 3D volume data is avoided by using layer as the basic processing unit. Fast 3D scan conversion of ray is achieved by using look up table based on the fact that the ray has the same direction in parallel projection. It is shown that the algorithm is better on memory requirement and speed than traditional algorithm through its realization on PC.
出处
《计算机辅助设计与图形学学报》
EI
CSCD
北大核心
1998年第4期295-301,共7页
Journal of Computer-Aided Design & Computer Graphics
基金
浙江大学CAD&CG国家重点实验室开放课题基金
