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Opacity light fields

Daniel Vlasic, Hanspeter Pfister, Sergey Molinov, Radek Grzeszczuk, Wojciech Matusik
2003 Proceedings of the 2003 symposium on Interactive 3D graphics - SI3D '03  
The opacity hull is a shape enclosing the object with view-dependent opacity parameterized onto that shape. We call the combination of opacity hulls and surface light fields the opacity light field.  ...  We present new hardware-accelerated techniques for rendering surface light fields with opacity hulls that allow for interactive visualization of objects that have complex reflectance properties and elaborate  ...  We especially thank Michael Doggett, Joe Chien, and Jeff Royle from ATI for providing us with the latest graphics hardware and DirectX 9.0 drivers.  ... 
doi:10.1145/641480.641496 dblp:conf/si3d/VlasicPMGM03 fatcat:3kgiqwf2dzd4pgrhxpfgjmqruq

Opacity light fields

Daniel Vlasic, Hanspeter Pfister, Sergey Molinov, Radek Grzeszczuk, Wojciech Matusik
2003 Proceedings of the 2003 symposium on Interactive 3D graphics - SI3D '03  
The opacity hull is a shape enclosing the object with view-dependent opacity parameterized onto that shape. We call the combination of opacity hulls and surface light fields the opacity light field.  ...  We present new hardware-accelerated techniques for rendering surface light fields with opacity hulls that allow for interactive visualization of objects that have complex reflectance properties and elaborate  ...  We especially thank Michael Doggett, Joe Chien, and Jeff Royle from ATI for providing us with the latest graphics hardware and DirectX 9.0 drivers.  ... 
doi:10.1145/641494.641496 fatcat:wtg2ujts2zfcpn3aaya2tieuwe

The extragalactic background light and the gamma-ray opacity of the universe

Eli Dwek, Frank Krennrich
2013 Astroparticle physics  
The EBL also plays an important role in the propagation of very high energy gamma-rays which are attenuated en route to Earth by pair producing gamma-gamma interactions with the EBL and CMB.  ...  The extragalactic background light (EBL) is one of the fundamental observational quantities in cosmology.  ...  Arendt for their comments on parts of the manuscript, and an  ... 
doi:10.1016/j.astropartphys.2012.09.003 fatcat:v4js222ihfc23b3hks47uobx6i

Multiple light field rendering

Jarno van der Linden
2003 Proceedings of the 1st international conference on Computer graphics and interactive techniques in Austalasia and South East Asia - GRAPHITE '03  
Light field rendering is the process of rendering novel views of a scene captured by the light field function.  ...  We present a rendering method for light fields which allows multiple instances of a light field to be rendered in combination with a polygon rendered scene.  ...  For a single light field the rendering preserves the opacity and colour of the light field view.  ... 
doi:10.1145/604471.604510 dblp:conf/graphite/Linden03 fatcat:t6d26kwihbc47pjpxt5absqitm

Multiple light field rendering

Jarno van der Linden
2003 Proceedings of the 1st international conference on Computer graphics and interactive techniques in Austalasia and South East Asia - GRAPHITE '03  
Light field rendering is the process of rendering novel views of a scene captured by the light field function.  ...  We present a rendering method for light fields which allows multiple instances of a light field to be rendered in combination with a polygon rendered scene.  ...  For a single light field the rendering preserves the opacity and colour of the light field view.  ... 
doi:10.1145/604509.604510 fatcat:43kpoircuvbjjms3lecxhmktea

Raycasting of Light Field Galleries from Volumetric Data

C. Rezk-Salama, S. Todt, A. Kolb
2008 Computer graphics forum (Print)  
The approach expands an existing sphere-hemisphere parameterization for the light field with per-pixel depth.  ...  We show how light field galleries can be created to give unexperienced audiences access to interactive high-quality volume renditions.  ...  During light field rendering, the user can interactively modify the opacity values of the different layers.  ... 
doi:10.1111/j.1467-8659.2008.01215.x fatcat:bdgdt4n4zjbyneftcnau4mcjdy

Anatomical Volume Visualization with Weighted Distance Fields [article]

Thomas Kerwin, Brad Hittle, Han-Wei Shen, Don Stredney, Gregory Wiet
2010 Eurographics Workshop on Visual Computing for Biomedicine  
We obtain real-time interaction with the volume by calculating the WDT on the graphics card.  ...  The WDT is presented as a general technique to generate a derived characteristic of a scalar field that can be used in multiple ways during rendering.  ...  This work is supported by a grant from the NIDCD, of the National Institutes of Health, 1 R01 DC06458-01A1.  ... 
doi:10.2312/vcbm/vcbm10/117-124 fatcat:jbdtrnu77jfg3m3o4wzygyeqee

View-dependent exploration of massive volumetric models on large-scale light field displays

José Antonio Iglesias Guitián, Enrico Gobbetti, Fabio Marton
2010 The Visual Computer  
The possibilities of the system are demonstrated by the multi-user interactive exploration of 64GVoxels datasets on a 35MPixel light field display driven by a cluster of PCs.  ...  raycasting engine with a number of improvements over current GPU volume raycasters.  ...  The view-dependent effect is evident when seen on the light field display.  ... 
doi:10.1007/s00371-010-0453-y fatcat:3byuukhlhvdufcqki3rlj5wfhu

Pop-up light field

Heung-Yeung Shum, Jian Sun, Shuntaro Yamazaki, Yin Li, Chi-Keung Tang
2004 ACM Transactions on Graphics  
Experimental results demonstrate that our system is capable of rendering anti-aliased novel views from a sparse light field.  ...  In this article, we present an image-based modeling and rendering system, which we call pop-up light field, that models a sparse light field using a set of coherent layers.  ...  In image-based opacity hulls [Matusik et al. 2002] , multi-background matting is used to acquire alpha mattes to construct a visual hull with view dependent opacity.  ... 
doi:10.1145/990002.990005 fatcat:vk3n4556frculcfvv63yxwrbem

Strategies for direct volume rendering of diffusion tensor fields

G. Kindlmann, D. Weinstein, D. Hart
2000 IEEE Transactions on Visualization and Computer Graphics  
In order to use volume rendering, however, we must develop methods for assigning opacity and color to the data, and create a method to shade the data to improve the legibility of the rendering.  ...  Finally, because interpolation between data points is a fundamental issue in volume rendering, we conclude with a discussion and evaluation of three distinct interpolation methods suitable for diffusion  ...  Alexander, assistant research professor in the Department of Radiology, University of Utah School of Medicine, for involving them in his research on diffusion tensor imaging, providing them with high-resolution  ... 
doi:10.1109/2945.856994 fatcat:2g34dmwbkje2baonqxxwjpjgty

Plenoxels: Radiance Fields without Neural Networks [article]

Alex Yu, Sara Fridovich-Keil, Matthew Tancik, Qinhong Chen, Benjamin Recht, Angjoo Kanazawa
2021 arXiv   pre-print
On standard, benchmark tasks, Plenoxels are optimized two orders of magnitude faster than Neural Radiance Fields with no loss in visual quality.  ...  We introduce Plenoxels (plenoptic voxels), a system for photorealistic view synthesis. Plenoxels represent a scene as a sparse 3D grid with spherical harmonics.  ...  Additionally, we would like to thank Ren Ng for helpful suggestions and Hang Gao for reviewing a draft of the paper.  ... 
arXiv:2112.05131v1 fatcat:p6mhlt3r3va4ndtm4t7j3hjlb4

Neural Reflectance Fields for Appearance Acquisition [article]

Sai Bi, Zexiang Xu, Pratul Srinivasan, Ben Mildenhall, Kalyan Sunkavalli, Miloš Hašan, Yannick Hold-Geoffroy, David Kriegman, Ravi Ramamoorthi
2020 arXiv   pre-print
We demonstrate that neural reflectance fields can be estimated from images captured with a simple collocated camera-light setup, and accurately model the appearance of real-world scenes with complex geometry  ...  We also demonstrate that we can compose the estimated neural reflectance field of a real scene with traditional scene models and render them using standard Monte Carlo rendering engines.  ...  view-dependent effects.  ... 
arXiv:2008.03824v2 fatcat:2itqpeyihndrfbealimbpptcqm

Visualization of Brain Microstructure Through Spherical Harmonics Illumination of High Fidelity Spatio-Angular Fields

Sujal Bista, Jiachen Zhuo, Rao P. Gullapalli, Amitabh Varshney
2014 IEEE Transactions on Visualization and Computer Graphics  
Figure 1 (d) shows the results of volume rendering where opacity and color are determined by spherical harmonic illumination of the diffusion kurtosis tensors for each voxel.  ...  Using spherical harmonics lighting functions described in this paper, we visualize spatio-angular fields. In this figure, we use the dataset of a patient suffering from traumatic brain injury.  ...  Any opinions, findings, conclusions, or recommendations expressed in this article are those of the authors and do not necessarily reflect the views of the research sponsors.  ... 
doi:10.1109/tvcg.2014.2346411 pmid:26356965 fatcat:3njj3qnfgbd2tbhkiqfqzqro7a

Baking Neural Radiance Fields for Real-Time View Synthesis [article]

Peter Hedman, Pratul P. Srinivasan, Ben Mildenhall, Jonathan T. Barron, Paul Debevec
2021 arXiv   pre-print
Neural volumetric representations such as Neural Radiance Fields (NeRF) have emerged as a compelling technique for learning to represent 3D scenes from images with the goal of rendering photorealistic  ...  The resulting scene representation retains NeRF's ability to render fine geometric details and view-dependent appearance, is compact (averaging less than 90 MB per scene), and can be rendered in real-time  ...  Acknowledgements We thank Keunhong Park and Michael Broxton for their generous help with debugging, and Ryan Overbeck for last-minute JavaScript help.  ... 
arXiv:2103.14645v1 fatcat:dgg6oklgkrerhgiit2oqpf6gci

Coverage-based opacity estimation for interactive Depth of Field in molecular visualization

Sathish Kottravel, Martin Falk, Erik Sunden, Timo Ropinski
2015 2015 IEEE Pacific Visualization Symposium (PacificVis)  
Figure 1 : Thermus thermophilus 70S ribosome (PDB ID: 2WDK) rendered with no Depth of Field effect (left) and using our approach focusing on near structures (center) and far away structures (right).  ...  ABSTRACT In this paper, we introduce coverage-based opacity estimation to achieve Depth of Field (DoF) effects when visualizing molecular dynamics (MD) data.  ...  Figure 13 compares the result of our interactive approach with the outcome of using a physically-based ray tracing in the Mitsuba renderer.  ... 
doi:10.1109/pacificvis.2015.7156385 dblp:conf/apvis/KottravelFSR15 fatcat:xiyp2kkqxzhejjbzn2t65avpaq
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