A model for volume lighting and modeling

Kniss, Joe; Premože, Simon; Hansen, Charles; Shirley, Peter; McPherson, Allen

doi:10.1109/tvcg.2003.1196003

Cited by 133 publications

(109 citation statements)

References 34 publications

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“…However, our algorithms do not need such a preprocessing step. There are other simplified lighting models for participating media and volumes [13,14,18,26]. For all these methods, only forward scattering is considered and lighting values are propagated from slice to slice.…”

Section: Discussionmentioning

confidence: 99%

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Lattice-Based Volumetric Global Illumination

Qiu

Fan

et al. 2007

IEEE Trans. Visual. Comput. Graphics

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Abstract-We describe a novel volumetric global illumination framework based on the Face-Centered Cubic (FCC) lattice. An FCC lattice has important advantages over a Cartesian lattice. It has higher packing density in the frequency domain, which translates to better sampling efficiency. Furthermore, it has the maximal possible kissing number (equivalent to the number of nearest neighbors of each site), which provides optimal 3D angular discretization among all lattices. We employ a new two-pass (illumination and rendering) global illumination scheme on an FCC lattice. This scheme exploits the angular discretization to greatly simplify the computation in multiple scattering and to minimize illumination information storage. The GPU has been utilized to further accelerate the rendering stage. We demonstrate our new framework with participating media and volume rendering with multiple scattering, where both are significantly faster than traditional techniques with comparable quality.

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Section: Discussionmentioning

confidence: 99%

“…Harris and Lastra [13] have used a similar approach to render clouds. Kniss et al [18] have introduced a volume lighting model for GPU-accelerated volume rendering with forward scattering using a single pass algorithm based on half angle slicing. Riley et al [26] have extended this method to render atmospheric phenomena.…”

Section: Introductionmentioning

confidence: 99%

Lattice-Based Volumetric Global Illumination

Qiu

Fan

et al. 2007

IEEE Trans. Visual. Comput. Graphics

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“…Our method is inspired from this two-step scheme. (Kniss et al, 2003) present a technique to illuminate volumetric data based on half angle slicing (Wilson et al, 1994), handling both a direct and an approximated indirect lighting, but only for a single light source situated outside the medium. (Magnor et al, 2005) introduce a method to visualize reflection nebulae in interactive time.…”

Section: Previous Workmentioning

confidence: 99%

Illuminating and Rendering Heterogeneous Participating Media in Real Time Using Opacity Propagation

Giroud

Biri

2011

Proceedings of the International Conference on Computer Graphics Theory and Applications

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Abstract:We present a new approach to illuminate and render single scattering effects in heterogeneous participating media in real time. The medium's density is modeled as a sum of radial basis functions, and is then sampled into a first volumetric grid. We then integrate the extinction function from each light source to each cell in the volume by a fast cell-to-cell propagation process on the GPU, and store the result in a second volume. We finally render both scattering medium and surfaces using a regular step ray-marching from the observer to the nearest surface. As we traverse the medium, we fetch data from both volumes and approximate a solution to the scattering equation. Our method is real-time, easy to implement and to integrate in a larger pipeline.

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“…While preprocessing can, in principle, be combined with any volume rendering algorithm, another widely used strategy directly exploits the benefits of the slice-based volume rendering paradigm [4]. In contrast to ray-casting approaches, slicebased rendering inherently synchronizes the ray front and thus reduces the complexity of the illumination computation when focusing on directional effects [12,13,34,40]. While all methods belonging to the two mentioned groups support advanced illumination at interactive frame rates, they also incorporate the drawbacks of the respective group.…”

Section: Introductionmentioning

confidence: 99%

Image Plane Sweep Volume Illumination

Sundén

Ynnerman

Ropinski

2011

IEEE Trans. Visual. Comput. Graphics

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Fig. 1. A CT scan of a penguin (512 × 512 × 1146 voxels) rendered using image plane sweep volume illumination. Local and global illumination effects are integrated, yielding in high quality visualizations of opaque as well as transparent materials.Abstract-In recent years, many volumetric illumination models have been proposed, which have the potential to simulate advanced lighting effects and thus support improved image comprehension. Although volume ray-casting is widely accepted as the volume rendering technique which achieves the highest image quality, so far no volumetric illumination algorithm has been designed to be directly incorporated into the ray-casting process. In this paper we propose image plane sweep volume illumination (IPSVI), which allows the integration of advanced illumination effects into a GPU-based volume ray-caster by exploiting the plane sweep paradigm. Thus, we are able to reduce the problem complexity and achieve interactive frame rates, while supporting scattering as well as shadowing. Since all illumination computations are performed directly within a single rendering pass, IPSVI does not require any preprocessing nor does it need to store intermediate results within an illumination volume. It therefore has a significantly lower memory footprint than other techniques. This makes IPSVI directly applicable to large data sets. Furthermore, the integration into a GPU-based ray-caster allows for high image quality as well as improved rendering performance by exploiting early ray termination. This paper discusses the theory behind IPSVI, describes its implementation, demonstrates its visual results and provides performance measurements.

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A model for volume lighting and modeling

Cited by 133 publications

References 34 publications

Lattice-Based Volumetric Global Illumination

Lattice-Based Volumetric Global Illumination

Illuminating and Rendering Heterogeneous Participating Media in Real Time Using Opacity Propagation

Image Plane Sweep Volume Illumination

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