光线跟踪方法在体绘制中的应用与发展

Survey of ray tracing in volume rendering

针对光线跟踪方法存在求交计算量大、实时交互性差等缺点。从体光线跟踪算法、基于图形硬件加速的光线跟踪体绘制方法、并行光线跟踪体绘制技术这3个方面,对国内外光线跟踪方法在体绘制中的应用技术进行了分类描述与综述,重点介绍了体光照模型、光线跟踪混合绘制、基于可编程硬件加速、并行绘制算法及体系结构,并结合应用阐述了各自特点及其相互联系,最后对光线跟踪方法在体绘制的应用提出了研究建议。

Ray tracing limited ti its huge computations of intersection and low performance of real-time interaction. Asurveyofvolume rendering technology concerning ray tracing is presented from the following profiles： volumetirc ray traicing and its implementation at present based on graphics hardware, parallel volume rendering concerning ray tracing, stresses on illumination model and hybrid rendering and parallel algorithms is introduced, characteristics and relationships of these profiles are discussed based on application, in the end some future directions of volume refidering concerning ray tracing are also proposed.