Title :
Transfer-Function Specification for Rendering Disparate Volumes
Author :
Bernardon, F??bio F. ; Ha, Linh K. ; Callahan, Steven P. ; Comba, Jo?£o L D ; Silva, Cl??udio T.
Author_Institution :
Fed. Univ. of Rio Grande do Sul, Porto Alegre
Abstract :
Being able to create insightful visualizations from both simulated and measured data is important for the visualization community. For scalar volumes, direct volume rendering has proved a useful tool for data exploration. Using a transfer function, we can map scalar values to colors and opacities to identify and enhance important features. Although researchers have developed some automatic techniques for transfer-function specification, the exploration process still requires users to tune the parameters manually until they can produce the desired visualization. Researchers have conducted substantial work to assist users in this specification task by providing interactive widgets. These tools generally assist users by letting them create and manipulate widgets over one or more dimensions of histogram information representing the data. The authors´ framework combines elements of existing transfer-function specification techniques and introduces new features to handle the direct volume rendering of a diversity of volumetric data sets.
Keywords :
data structures; data visualisation; rendering (computer graphics); transfer functions; data exploration; data representation; data visualization; direct volume rendering; histogram information; interactive widget; transfer-function specification; volumetric data set; Data mining; Data visualization; Dynamic range; Feature extraction; Histograms; Medical simulation; Multidimensional systems; Table lookup; Transfer functions; scientific visualization; transfer functions; volume rendering;
Journal_Title :
Computing in Science Engineering
DOI :
10.1109/MCSE.2008.158