Cell-Projection Parallel Volume Rendering with Early Ray Termination

A cell-projection parallel volume rendering system for unstructured grid volume data is proposed in this paper. For this system, the modified early ray termination scheme is proposed to prune the cell-projection of invisible cell. In order to alleviate load imbalance due to view-dependency in scan-conversion and the dynamic behavior of early-ray termination, the authors also implement dynamic load balancing mechanism into their system. Preliminary evaluation of this system shows the 4.32-times performance improvement compared to the system without early ray termination and dynamic load balancing.