Astrophysics Visualization

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M. Ament, F. Sadlo, D. Weiskopf:

Ambient Volume Scattering

IEEE Transactions on Visualization and Computer Graphics, vol. 19, no. 12, pp. 2936–2945, 2013.

Abstract

We present ambient scattering as a preintegration method for scattering on mesoscopic scales in direct volume rendering. Far-range scattering effects usually provide negligible contributions to a given location due to the exponential attenuation with increasing distance. This motivates our approach to preintegrating multiple scattering within a finite spherical region around any given sample point. To this end, we solve the full light transport with a Monte-Carlo simulation within a set of spherical regions, where each region may have different material parameters regarding anisotropy and extinction. This precomputation is independent of the data set and the transfer function, and results in a small preintegration table. During rendering, the look-up table is accessed for each ray sample point with respect to the viewing direction, phase function, and material properties in the spherical neighborhood of the sample. Our rendering technique is efficient and versatile because it readily fits in existing ray marching algorithms and can be combined with local illumination and volumetric ambient occlusion. It provides interactive volumetric scattering and soft shadows, with interactive control of the transfer function, anisotropy parameter of the phase function, lighting conditions, and viewpoint. A GPU implementation demonstrates the benefits of ambient scattering for the visualization of different types of data sets, with respect to spatial perception, high-quality illumination, translucency, and rendering speed.

Available Files

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Publications

2023
Reviewed Journal Papers
R. Alghamdi, T. Müller, A. Jaspe‐Villanueva, M. Hadwiger, F. Sadlo:
Doppler Volume Rendering: A Dynamic, Piecewise Linear Spectral Representation for Visualizing Astrophysics Simulations
Computer Graphics Forum, vol. 42, no. 3, pp. 39–49, 2023.
Available files: [BibTeX] [DOI] [Details]

2020
Reviewed Journal Papers
A. Sagristà, S. Jordan, F. Sadlo:
Visual Analysis of the Finite-Time Lyapunov Exponent
Computer Graphics Forum, vol. 39, no. 3, pp. 331–342, 2020.
Available files: [BibTeX] [DOI] [PDF] [Video] [Details]

2019
Reviewed Journal Papers
A. Sagristà, S. Jordan, T. Müller, F. Sadlo:
Gaia Sky: Navigating the Gaia Catalog
IEEE Transactions on Visualization and Computer Graphics, vol. 25, no. 1, pp. 1070–1079, 2019.
Available files: [BibTeX] [DOI] [PDF] [Highres PDF] [Video] [Details]

2017
Reviewed Journal Papers
A. Sagristà, S. Jordan, A. Just, F. Dias, L. G. Nonato, F. Sadlo:
Topological Analysis of Inertial Dynamics
IEEE Transactions on Visualization and Computer Graphics, vol. 23, no. 1, pp. 950–959, 2017.
Available files: [BibTeX] [DOI] [PDF] [Highres PDF] [Technical Addendum] [Video] [Details]

Reviewed Conference Papers
R. Peikert, G. M. Machado, F. Sadlo:
Topological Extraction of Escape Maps in Divergence-Free Vector Fields
In Topological Methods in Data Analysis and Visualization IV, Springer International Publishing, pp. 171–186, 2017.
Available files: [BibTeX] [DOI] [Details]

2016
Reviewed Journal Papers
A. Brown, .. ..., A. Sagristà, .. ..., :
Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
Astronomy & Astrophysics, 2016.
Available files: [BibTeX] [DOI]

T. Prusti, .. ..., A. Sagristà, .. ..., :
The Gaia mission
Astronomy & Astrophysics, 2016.
Available files: [BibTeX] [DOI]

2015
Reviewed Journal Papers
A. Manrique, E. Salvador-Solé, E. Juan, E. Hatziminaoglou, J. M. Rozas, A. Sagristà, K. Casteels, G. Bruzual, G. Magris:
Leaving the Dark Ages with AMIGA
The Astrophysical Journal Supplement Series, vol. 216, no. 1, pp. 13, 2015.
Available files: [BibTeX] [DOI] [Details]

2014
Reviewed Journal Papers
G. M. Machado, F. Sadlo, T. Müller, T. Ertl:
Escape Maps
IEEE Transactions on Visualization and Computer Graphics, vol. 20, no. 12, pp. 2604–2613, 2014.
Available files: [BibTeX] [DOI] [PDF] [Highres PDF] [Details]

2013
Reviewed Journal Papers
M. Ament, F. Sadlo, D. Weiskopf:
Ambient Volume Scattering
IEEE Transactions on Visualization and Computer Graphics, vol. 19, no. 12, pp. 2936–2945, 2013.
Available files: [BibTeX] [DOI] [PDF] [Details]

Reviewed Conference Papers
G. M. Machado, F. Sadlo, T. Ertl:
Local Extraction of Bifurcation Lines
In Proceedings of International Workshop on Vision, Modeling and Visualization (VMV), pp. 17–24, 2013.
Available files: [BibTeX] [DOI] [PDF] [Details]

2012
Reviewed Conference Papers
G. M. Machado, F. Sadlo, T. Müller, D. Müller, T. Ertl:
Visualizing Solar Dynamics Data
In Proceedings of International Workshop on Vision, Modeling and Visualization (VMV), pp. 95–102, 2012.
Available files: [BibTeX] [DOI] [PDF] [Technical Addendum] [Video] [Details]