2001 Volume 55 Issue 7 Pages 1011-1018
Fast direct volume-rendering systems are in high demand due to the increasing amount of scientific data generated by a variety of computer simulations, of medical data obtained by MRI and CT scanners, and of geological, oceanographic, and meteorological data collected from various sensors. A notable characteristic shared by these data volumes is the sheer amount of data to be rendered. A huge amount of computing power is thus needed for animated visualization, which is essential to observe many physical phenomena. We propose a fast parallel volume-rendering method using multiple-shear composition and describe its implementation on a PC-cluster. In this system, a volume is divided into subvolumes, one for each PC, and each PC generates base-plane image from its subvolume. These images are composited into a single base-plane image that is warped to get the correct image on the screen. Our proposed “multiple-shear composition” method is nearly four time faster than a raycasting method we implemented on the same PC-cluster. In addition, it has processing scalability due to the low volume of communications between PCs. A large volume can be handled because each PC handles only a subvolume. This system is thus suitable for large-scale scientific simulations.
The Proceedings of the Circle of Television Engineers
The Proceedings of the Institute of Television Engineers
The Proceedings of the Institute of Television Engineers
The Institute of Image Information and Televistion Engineers
The Journal of the Institute of Television Engineers of Japan
The Journal of the Institute of Television Engineers of Japan