Pre-Integrated Volume Rendering with Non-Linear Gradient Interpolation
| Autor: | Jean-Michel Dischler, Stéphane Marchesin, A Guetat, Alexandre Ancel |
|---|---|
| Přispěvatelé: | Dischler, Jean-Michel, Masse de données Connaissances Ambiantes - Acquisition, Traitement et Rendu d'Objets Complexes - - ATROCO2007 - ANR-07-MDCO-0001 - MDCO - VALID, Laboratoire des Sciences de l'Image, de l'Informatique et de la Télédétection (LSIIT), Centre National de la Recherche Scientifique (CNRS), ANR-07-MDCO-0001,ATROCO,Acquisition, Traitement et Rendu d'Objets Complexes(2007) |
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Models
Anatomic Phong shading Databases Factual Computer science ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION [INFO.INFO-GR] Computer Science [cs]/Graphics [cs.GR] 02 engineering and technology pre-integration 03 medical and health sciences 0302 clinical medicine Imaging Three-Dimensional volume rendering 0202 electrical engineering electronic engineering information engineering Computer Graphics Humans Computer vision Computer Simulation 030223 otorhinolaryngology ComputingMethodologies_COMPUTERGRAPHICS business.industry Ray casting 020207 software engineering Volume rendering Computer Graphics and Computer-Aided Design [INFO.INFO-GR]Computer Science [cs]/Graphics [cs.GR] Nonlinear Dynamics Feature (computer vision) Signal Processing Computer Vision and Pattern Recognition Artificial intelligence Shading business Tomography X-Ray Computed Head Software Interpolation |
| Zdroj: | IEEE Transactions on Visualization and Computer Graphics IEEE Transactions on Visualization and Computer Graphics, Institute of Electrical and Electronics Engineers, 2010, 16 (6), p. 1487-1494 |
| ISSN: | 1077-2626 |
| Popis: | International audience; Shading is an important feature for the comprehension of volume datasets, but is difficult to implement accurately. Current techniques based on pre-integrated direct volume rendering approximate the volume rendering integral by ignoring non-linear gradient variations between front and back samples, which might result in cumulated shading errors when gradient variations are important and / or when the illumination function features high frequencies. In this paper, we explore a simple approach for pre-integrated volume rendering with non-linear gradient interpolation between front and back samples. We consider that the gradient smoothly varies along a quadratic curve instead of a segment in-between consecutive samples. This not only allows us to compute more accurate shaded pre-integrated look-up tables, but also allows us to more efficiently process shading amplifying effects, based on gradient filtering. An interesting property is that the pre-integration tables we use remain two-dimensional as for usual pre-integrated classification. We conduct experiments using a full hardware approach with the Blinn-Phong illumination model as well as with a non-photorealistic illumination model. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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