@article {13325,
	title = {Selective refinement queries for volume visualization of unstructured tetrahedral meshes},
	journal = {Visualization and Computer Graphics, IEEE Transactions on},
	volume = {10},
	year = {2004},
	month = {2004///},
	pages = {29 - 45},
	abstract = {We address the problem of the efficient visualization of large irregular volume data sets by exploiting a multiresolution model based on tetrahedral meshes. Multiresolution models, also called Level-Of-Detail (LOD) models, allow encoding the whole data set at a virtually continuous range of different resolutions. We have identified a set of queries for extracting meshes at variable resolution from a multiresolution model, based on field values, domain location, or opacity of the transfer function. Such queries allow trading off between resolution and speed in visualization. We define a new compact data structure for encoding a multiresolution tetrahedral mesh built through edge collapses to support selective refinement efficiently and show that such a structure has a storage cost from 3 to 5.5 times lower than standard data structures used for tetrahedral meshes. The data structures and variable resolution queries have been implemented together with state-of-the art visualization techniques in a system for the interactive visualization of three-dimensional scalar fields defined on tetrahedral meshes. Experimental results show that selective refinement queries can support interactive visualization of large data sets.},
	keywords = {Automated;Signal Processing, Computer-Assisted;Imaging, Computer-Assisted;User-Computer Interface;, data structure;geometric modeling;interactive visualization;large data sets;multiresolution model;selective refinement queries;unstructured tetrahedral meshes;variable resolution queries;volume data visualization;data visualisation;mesh generation;query p, Three-Dimensional;Online Systems;Pattern Recognition},
	isbn = {1077-2626},
	doi = {10.1109/TVCG.2004.1260756},
	author = {Cignoni,P. and De Floriani, Leila and Magillo,P. and Puppo,E. and Scopigno,R.}
}
