基于CUDA的体数据可视化工具

CUDA-Based Volume Data Visualization Tool

GPU的可编程性和并行计算能力的飞速发展为可视化提供了新的解决途径。基于支持CUDA的GPU,利用光线投射,实现了一个可以对体数据进行交互式可视化的工具,包括阻光度融合、等值面绘制、MIP绘制以及X光线投影等多种绘制效果,并加入了Phong光照模型以提高阻光度融合和等值面绘制的图像质量。实验表明,该工具较好的利用了GPU的并行计算能力,能够绘制出较高质量的图像,并具有良好的可交互性和可扩展性。

The fast development of the Graphics Processing Unit＇s programmability and parallel computing power provides new solutions for visualization technoiogy. Using ray-casting, a CUDA based interactive volume rendering tool is realized. Several rendering effects have been implemented, including alpha blending, iso-surface rendering, maximum intensity projection and X-ray projection. In order to improve alpha blending and iso-surface rendering effect, a per-pixel based Phong Lighting Model is added in. The experimental results show that the tool can make use of GPU＇s parallel computing capability and render high quality image. It＇s interactive and extensible.