基于GPU光线投射的多平面交互彩色体数据切割方法

Interactive GPU Ray Casting Based Multiple Planar Volume Clipping Methods for 3D Color Dataset of Digital Human

基于代理多边形的3D纹理映射体绘制成像速度快,能够直接利用OpenGL剪切平面功能实现多平面实时切割,但成像质量不高。本文通过分析彩色数据场的不透明度转换函数,研究基于GPU的光线投射算法,用于数字人彩色体数据的快速高质量可视化。为了避免转换函数设计困难和不足,提出一种基于GPU的多平面快速切割算法,能够实时清晰观察彩色体数据内部组织。实验结果表明:基于GPU的光线投射算成像质量高、速度快,该多平面交互切割方法能够清晰观察组织结构。

Proxy re-sampling polygon based 3D texturing volume rendering can directly utilize the OpenGL clip plane function to implement multiple planar volume clipping at real time frame rates, but it cannot obtain high quality images. After analyzing the transfer function of color datasets, a ray casting algorithm is implemented on GPUs to obtain interactive high quality visualization of color datasets. To avoid difficulties in designing the transfer function, a multiple planar clipping algorithm based on GPU ray casting is proposed to provide a clear observation of inner tissues within 3D color datasets. Experiments show that the GPU ray casting can generate high quality images at interactive frame rates, and the multiple planar clipping algorithm can generate high quality cut views of 3D color datasets.