A Multidirectional Occlusion Shading Model for Direct Volume Rendering
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Date
2010
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association and Blackwell Publishing Ltd.
Abstract
In this paper, we present a novel technique which simulates directional light scattering for more realistic interactive visualization of volume data. Our method extends the recent directional occlusion shading model by enabling light source positioning with practically no performance penalty. Light transport is approximated using a tilted cone-shaped function which leaves elliptic footprints in the opacity buffer during slice-based volume rendering. We perform an incremental blurring operation on the opacity buffer for each slice in front-to-back order. This buffer is then used to define the degree of occlusion for the subsequent slice. Our method is capable of generating high-quality soft shadowing effects, allows interactive modification of all illumination and rendering parameters, and requires no pre-computation.
Description
@article{:10.1111/j.1467-8659.2009.01695.x,
journal = {Computer Graphics Forum},
title = {{A Multidirectional Occlusion Shading Model for Direct Volume Rendering}},
author = {oltészová, Veronika and Patel, Daniel and Bruckner, Stefan and Viola, Ivan},
year = {2010},
publisher = {The Eurographics Association and Blackwell Publishing Ltd.},
ISSN = {1467-8659},
DOI = {/10.1111/j.1467-8659.2009.01695.x}
}