【摘要】 提出了利用目前的图像处理器(GPU)的点块纹理、帧缓存对象(FBO)和可编程功能来加速实现EWA Splatting的体绘制算法.该算法直接以采样点作为代理几何,利用光线投射在GPU中求取每个像素点的所对应三维纹理坐标,同时用一个近似低通滤波器代替高斯滤波器.试验结果表明,所提出的算法可以应用于高质量的交互科学计算可视化.更多还原

【Abstract】 This paper proposed an accelerated algorithm for EWA volume Splatting based on modern graphic processing unit(GPU).It mainly made use of point sprite,frame buffer object and programmable function of GPU.In the algorithm,sampling points are directly regarded as proxy geometry,three dimension texture coordinates at pixels are computed by ray tracing in GPU and Gaussian filter is replaced by an approximate filter.The experimental results demonstrate that the algorithm can be used in high quality and interactive visualization.更多还原