一种基于非透明度校正的光线投射体绘制算法

针对传统光线投射体绘制算法的非透明度校正不能满足实际应用的要求,提出了一种新的体绘制算法。该算法基于新的采样合成函数,采用非透明度提前截止来判断光线终止。最后,通过gsgl语言编写顶点程序和片段程序对实现了算法。实验结果表明该算法在不同的采样间距下都可以大大改善体绘制的质量和速度。

A non-transparency correction based ray casting volume rendering algorithm

For the correction of non-transparency in traditional ray casting volume rendering algorithm can not meet the requirements of practical application, a new volume rendering algorithm was put forward in this paper. It uses a new sampling synthesis function and cutoff of non-transparency ahead of deadline to determine the termination of light. Finally, the algorithm was implemented by using gsgl language to compile vertex and fragment programs. The experimental results show that the proposed algorithm under different sampling spacing can greatly improve the quality and speed of ray casting volume rendering.