Abstract
This paper presents an integrated approach for interactive direct volume deformation and simultaneous visualization. The fundamental requirement is that interactive performance without pre-processing must be achieved for large volume data, where at any time up to one million elements participate in a deformation that is applied interactively by picking and dragging in the 3D view. Current physically-based approaches are still one or two orders of magnitude away from this goal. In contrast, our approach extends the non-physical ChainMail algorithm and combines it with on-the-fly resampling and GPU ray-casting. Special transfer functions assign material properties depending on volume density. The affected subvolume is deformed and resampled onto a rectilinear grid on the CPU, and updates the volume on the GPU where it is rendered using ray-casting. While the deformation is already being displayed, its quality is simultaneously refined via an iterative relaxation procedure executed in a parallel thread.
Original language | English (US) |
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Pages | 39-46 |
Number of pages | 8 |
State | Published - 2007 |
Externally published | Yes |
Event | 2nd International Conference on Computer Graphics Theory and Applications, GRAPP 2007 - Barcelona, Spain Duration: Mar 8 2007 → Mar 11 2007 |
Other
Other | 2nd International Conference on Computer Graphics Theory and Applications, GRAPP 2007 |
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Country/Territory | Spain |
City | Barcelona |
Period | 03/8/07 → 03/11/07 |
Keywords
- Deformation
- Resampling
- Volume Rendering
ASJC Scopus subject areas
- Computer Graphics and Computer-Aided Design
- Computer Science Applications
- Software