4D volume rendering with the Shear Warp factorisation
VVS '00 Proceedings of the 2000 IEEE symposium on Volume visualization
View-dependent multiresolution splatting of non-uniform data
VISSYM '02 Proceedings of the symposium on Data Visualisation 2002
Time-varying, multivariate volume data reduction
Proceedings of the 2005 ACM symposium on Applied computing
Compression of time varying isosurfaces
GI '06 Proceedings of Graphics Interface 2006
Time-varying volume geometry compression with 4d lifting wavelet transform
GMP'06 Proceedings of the 4th international conference on Geometric Modeling and Processing
VG'05 Proceedings of the Fourth Eurographics / IEEE VGTC conference on Volume Graphics
Hi-index | 0.00 |
Visualization of time-varying volumetric data sets, which may be obtained from numerical simulations or sensing instruments, provides scientists insights into the detailed dynamics of the phenomenon under study. This paper describes a coherent solution based on quantization, coupled with octree and difference encoding for visualizing time-varying volumetric data. Quantization is used to attain voxel-level compression and may have a significant influence on the performance of the subsequent encoding and visualization steps. Octree encoding is used for spatial domain compression, and difference encoding for temporal domain compression. In essence, neighboring voxels may be fused into macro voxels if they have similar values, and subtrees at consecutive time steps may be merged if they are identical. The software rendering process is tailored according to the tree structure and the volume visualization process. With the tree representation, selective rendering may be performed very efficiently. Additionally, the I/O costs are reduced. With these combined savings, a higher level of user interactivity is achieved. We have studied a variety of time-varying volume datasets, performed encoding based on data statistics, and optimized the rendering calculations wherever possible. Preliminary tests on workstations have shown in many cases tremendous reduction by as high as 9 inter-frame delay.