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A versatile optical model for hybrid rendering of volume data

Xiang, D; Yang, F; Tian, J; Cao, Y; Li, Qingde


D Xiang

F Yang

J Tian

Y Cao


In volume rendering, most optical models currently in use are based on the assumptions that a volumetric object is acollection of particles and that the macro behavior of particles, when they interact with light rays, can be predicted based on thebehavior of each individual particle. However, such models are not capable of characterizing the collective optical effect of a collectionof particles which dominates the appearance of the boundaries of dense objects. In this paper, we propose a generalized optical modelthat combines particle elements and surface elements together to characterize both the behavior of individual particles and thecollective effect of particles. The framework based on a new model provides a more powerful and flexible tool for hybrid rendering ofisosurfaces and transparent clouds of particles in a single scene. It also provides a more rational basis for shading, so the problem ofnormal-based shading in homogeneous regions encountered in conventional volume rendering can be easily avoided. The model canbe seen as an extension to the classical model. It can be implemented easily, and most of the advanced numerical estimation methodspreviously developed specifically for the particle-based optical model, such as preintegration, can be applied to the new model toachieve high-quality rendering results.

Journal Article Type Article
Publication Date Jun 1, 2012
Journal IEEE Transactions on Visualization and Computer Graphics
Print ISSN 1077-2626
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 18
Issue 6
Pages 925 - 937
APA6 Citation Xiang, D., Yang, F., Tian, J., Cao, Y., & Li, Q. (2012). A versatile optical model for hybrid rendering of volume data. IEEE Transactions on Visualization and Computer Graphics, 18(6), 925 - 937. doi:10.1109/TVCG.2011.113