Hardware-Accelerated Particle-Based Volume Rendering for Multiple Irregular Volumes

Authors:
Naohisa Sakamoto;Ding Zhongming;Takuma Kawamura;Koji Koyamada
Affiliations:
Center for the Promotion of Excellence in Higher Education, Kyoto University,;Graduate School of Electrical Engineering, Kyoto University,;Graduate School of Electrical Engineering, Kyoto University,;Center for the Promotion of Excellence in Higher Education, Kyoto University,
Venue:
ISVC '08 Proceedings of the 4th International Symposium on Advances in Visual Computing, Part II
Year:
2008

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Abstract

In this paper, we propose a performance improvement of particle-based volume rendering (PBVR) by using a current, programmable GPU architecture. PBVR allows to render without visibility sorting by representing a given volume dataset as a set of opaque and emissive particles. In our new GPU acceleration of PBVR, we provide a switchable rendering pipeline that is compatible with both regular and irregular grid volumes. Particle generation is improved by using a cell-by-cell approach for processing large volume dataset. We also reduce the memory cost required for storing all sub-pixel values by proposing a pixel-superimposing technique targeting a large sub-pixel level. Our work demonstrates a full detail rendering rate from 5 to 11 fps for overlapped or separated multi-irregular volumes with a mega-scale number of volume cells on NVIDIA Geforce 8800GTX.