Display of Surfaces from Volume Data
IEEE Computer Graphics and Applications
Adding shadows to a texture-based volume renderer
VVS '98 Proceedings of the 1998 IEEE symposium on Volume visualization
Optical Models for Direct Volume Rendering
IEEE Transactions on Visualization and Computer Graphics
Multidimensional Transfer Functions for Interactive Volume Rendering
IEEE Transactions on Visualization and Computer Graphics
A Model for Volume Lighting and Modeling
IEEE Transactions on Visualization and Computer Graphics
VIS '91 Proceedings of the 2nd conference on Visualization '91
Vicinity Shading for Enhanced Perception of Volumetric Data
Proceedings of the 14th IEEE Visualization 2003 (VIS'03)
Hardware accelerated ambient occlusion techniques on GPUs
Proceedings of the 2007 symposium on Interactive 3D graphics and games
Implicit visibility and antiradiance for interactive global illumination
ACM SIGGRAPH 2007 papers
GPU-accelerated deep shadow maps for direct volume rendering
GH '06 Proceedings of the 21st ACM SIGGRAPH/EUROGRAPHICS symposium on Graphics hardware
Enhancing Depth-Perception with Flexible Volumetric Halos
IEEE Transactions on Visualization and Computer Graphics
GPU-Based Monte-Carlo Volume Raycasting
PG '07 Proceedings of the 15th Pacific Conference on Computer Graphics and Applications
From obscurances to ambient occlusion: A survey
The Visual Computer: International Journal of Computer Graphics
Local Ambient Occlusion in Direct Volume Rendering
IEEE Transactions on Visualization and Computer Graphics
Interactive global light propagation in direct volume rendering using local piecewise integration
SPBG'08 Proceedings of the Fifth Eurographics / IEEE VGTC conference on Point-Based Graphics
VG'07 Proceedings of the Sixth Eurographics / Ieee VGTC conference on Volume Graphics
A directional occlusion shading model for interactive direct volume rendering
EuroVis'09 Proceedings of the 11th Eurographics / IEEE - VGTC conference on Visualization
Chromatic shadows for improved perception
Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Non-Photorealistic Animation and Rendering
Illustrative Couinaud segmentation for ultrasound liver examinations
SG'11 Proceedings of the 11th international conference on Smart graphics
Depth of field effects for interactive direct volume rendering
EuroVis'11 Proceedings of the 13th Eurographics / IEEE - VGTC conference on Visualization
Stylized volume visualization of streamed sonar data
Proceedings of the 28th Spring Conference on Computer Graphics
Instant convolution shadows for volumetric detail mapping
ACM Transactions on Graphics (TOG)
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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.