Filters








5,438 Hits in 3.8 sec

Perturbation methods for interactive specular reflections

M. Chen, J. Arvo
2000 IEEE Transactions on Visualization and Computer Graphics  
We describe a new approach for interactively approximating specular reflections in arbitrary curved surfaces.  ...  expressing them as perturbations of nearby points with known reflections.  ...  Acknowledgments The authors wish to thank Anil Hirani and Al Barr for many valuable discussions, Don Mitchell and Pat Hanrahan for their patience in answering our questions, and Mark Meyer for helpful  ... 
doi:10.1109/2945.879786 fatcat:2efj7jkxf5hkhduhkpy3hackpy

Manifold exploration

Wenzel Jakob, Steve Marschner
2012 ACM Transactions on Graphics  
The resulting rendering algorithms handle specular, near-specular, glossy, and diffuse surface interactions as well as isotropic or highly anisotropic volume scattering interactions, all using the same  ...  Figure 1 : Two views of an interior scene with complex specular and near-specular transport, rendered using manifold exploration path tracing: (a) Refractive, reflective, and glossy tableware, (b) A brass  ...  Acknowledgements This research was conducted in conjunction with the Intel Science and Technology Center for Visual Computing.  ... 
doi:10.1145/2185520.2185554 fatcat:yecmb55k75flja2bekhezxfqdy

Manifold exploration

Wenzel Jakob, Steve Marschner
2012 ACM Transactions on Graphics  
The resulting rendering algorithms handle specular, near-specular, glossy, and diffuse surface interactions as well as isotropic or highly anisotropic volume scattering interactions, all using the same  ...  Figure 1 : Two views of an interior scene with complex specular and near-specular transport, rendered using manifold exploration path tracing: (a) Refractive, reflective, and glossy tableware, (b) A brass  ...  Acknowledgements This research was conducted in conjunction with the Intel Science and Technology Center for Visual Computing.  ... 
doi:10.1145/2185520.2335409 fatcat:rpe5gvpspbey7nsjohkawconp4

An efficient radiosity solution for bump texture generation

Hong Chen, En-Hua Wu
1990 Proceedings of the 17th annual conference on Computer graphics and interactive techniques - SIGGRAPH '90  
As a result, a bilinearinterpolation shading scheme for perturbed surfaces is pro-vided~ and the texturing method is easily added to a newly improved solution of progressive refinement radiosity for non-diffuse  ...  To calculate the perturbed radlosity, a concept of perturbed formfactors is proposed, and the algorithms for evaluating the perturbed form-factors are also given.  ...  Acknowledgements Thanks are given to Yun-Mei Dong and Kei-De Li for providing Apollo-DN580 on which the software was developed during the first stage, and for providing printing facilities.  ... 
doi:10.1145/97879.97893 dblp:conf/siggraph/ChenW90 fatcat:ztimohznqzfyziyjdshsctkyau

Theory and application of specular path perturbation

Min Chen, James Arvo
2000 ACM Transactions on Graphics  
In this paper we apply perturbation methods to the problem of computing specular reflections in curved surfaces.  ...  This technique leads to a new method for path reuse which can be applied in a number of contexts, including the computation of caustics and specular reflections [Chen 1999] .  ...  reviewers for their helpful comments.  ... 
doi:10.1145/380666.380670 fatcat:ocswt5g33nevjdtkgepdnrqhoi

Generative constraints on image cues for perceived gloss

P. J. Marlow, B. L. Anderson
2013 Journal of Vision  
We identify generative constraints on each of our proposed cues that allow us to predict which cue will vary most for a given surface geometry, reflectance function, and light field.  ...  Image structure is generated by distinct physical sources that include 3-D surface geometry, surface reflectance, and the light field.  ...  The authors thank Juno Kim for his comments on an earlier version of this manuscript and for contributing to the materials used to render the stimuli.  ... 
doi:10.1167/13.14.2 pmid:24297776 fatcat:6asf54y2irfizdx3dqjv5ggk7e

Illuminant cues in surface color perception: tests of three candidate cues

Joong Nam Yang, Laurence T. Maloney
2001 Vision Research  
Method for computing the scene-illuminant chromaticity from specular highlights. and (3) uniform background.  ...  In a series of experiments we perturbed the illuminant color signaled by each candidate cue and looked for an influence of the changed cue on achromatic settings.  ...  Perturbing specularity cues The specular cues are perturbed as follows.  ... 
doi:10.1016/s0042-6989(01)00143-2 pmid:11520505 fatcat:adxrfdwn7vfebe247kj5fb5xfa

Glossy probe reprojection for interactive global illumination

Simon Rodriguez, Thomas Leimkühler, Siddhant Prakash, Chris Wyman, Peter Shirley, George Drettakis
2020 ACM Transactions on Graphics  
Naive probe reprojection often sharpens glossy reflections at occlusion boundaries, due to changes in parallax.  ...  Combining these elements, our algorithm interactively renders complex scenes while fitting in the memory, bandwidth, and computation constraints of current hardware.  ...  Other methods rely on the perturbation of existing specular paths.  ... 
doi:10.1145/3414685.3417823 fatcat:aws233wbv5dgvaexi3zguzyode

AppGen

Yue Dong, Xin Tong, Fabio Pellacini, Baining Guo
2011 ACM Transactions on Graphics  
Abstract We present AppGen, an interactive system for modeling materials from a single image.  ...  Our system generates convincing results within minutes of interaction and works well for a variety of material types that exhibit different reflectance and normal variations, including natural surfaces  ...  Acknowledgments The authors would like to thank Stephen Lin for paper proofreading and Matt Callcut for video dubbing.  ... 
doi:10.1145/2070781.2024180 fatcat:lohc2jte4bczlfzrxvwjzmojja

AppGen

Yue Dong, Xin Tong, Fabio Pellacini, Baining Guo
2011 Proceedings of the 2011 SIGGRAPH Asia Conference on - SA '11  
Abstract We present AppGen, an interactive system for modeling materials from a single image.  ...  Our system generates convincing results within minutes of interaction and works well for a variety of material types that exhibit different reflectance and normal variations, including natural surfaces  ...  Acknowledgments The authors would like to thank Stephen Lin for paper proofreading and Matt Callcut for video dubbing.  ... 
doi:10.1145/2024156.2024180 fatcat:tjq4dzlwivgi7kknz4hoxhn64u

AppGen

Yue Dong, Xin Tong, Fabio Pellacini, Baining Guo
2011 Proceedings of the 2011 SIGGRAPH Asia Conference on - SA '11  
Abstract We present AppGen, an interactive system for modeling materials from a single image.  ...  Our system generates convincing results within minutes of interaction and works well for a variety of material types that exhibit different reflectance and normal variations, including natural surfaces  ...  Acknowledgments The authors would like to thank Stephen Lin for paper proofreading and Matt Callcut for video dubbing.  ... 
doi:10.1145/2070752.2024180 fatcat:2gcxevttwfd45jxovyh3is3i3i

'Proto-rivalry': how the binocular brain identifies gloss

Alexander A. Muryy, Roland W. Fleming, Andrew E. Welchman
2016 Proceedings of the Royal Society of London. Biological Sciences  
Visually identifying glossy surfaces can be crucial for survival (e.g. ice patches on a road), yet estimating gloss is computationally challenging for both human and machine vision.  ...  In particular, we show that the unusual disparity gradients and vertical offsets produced by reflections create distinctive 'protorivalrous' (barely fusible) image regions that are a critical indicator  ...  We thank Lukas Schaeffner for help with data collection and preliminary analysis. We thank Andrew Blake, Jenny Read, and Andrew Glennerster for discussions. rspb.royalsocietypublishing.org Proc. R.  ... 
doi:10.1098/rspb.2016.0383 pmid:27170713 pmcid:PMC4874713 fatcat:ekkt4dforrb2fpt2pxq3e3klc4

Page 282 of Astronomy and Astrophysics Vol. 301, Issue 1 [page]

1995 Astronomy and Astrophysics  
Astrophys. 301, 282-289 (1995) ASTRONOMY AND ASTROPHYSICS Specular reflection of sunlight from wavy ocean surfaces and the albedo effect on satellite orbits II.  ...  The diffusive and specular parts of the Earth-reflected sunlight were studied in the context of the LAGEOS residuals problem either separately (e.g.  ... 

Real-Time Photo-Realistic Rendering for Surgical Simulations with Graphics Hardware [chapter]

Mohamed A. ElHelw, Benny P. Lo, Ara Darzi, Guang-Zhong Yang
2004 Lecture Notes in Computer Science  
Improved realism is achieved by a combined use of specular reflectance and refractance maps to model the effect of surface details and mucous layer on the overall visual appearance of the tissue.  ...  Computer-based surgical simulations are being increasingly used for training and skills assessment. They provide an efficient and cost effective alternative to traditional training methods.  ...  For real-time applications, a reflectance map can be used to describe a perturbed normal value for each image pixel (texel).  ... 
doi:10.1007/978-3-540-28626-4_42 fatcat:evf4xzptkzdh5etiltc6ksf2fu

Surface Enhancement Using Real-time Photometric Stereo and Reflectance Transformation [article]

Tom Malzbender, Bennett Wilburn, Dan Gelb, Bill Ambrisco
2006 Symposium on Rendering  
Transforming reflectance based on recovered normal directions is useful for enhancing the appearance of subtle surface detail.  ...  We present the first system that achieves real-time photometric stereo and reflectance transformation.  ...  Acknowledgements We thank Augusto Roman and Mark Levoy of Stanford University for the use of their high speed video camera.  ... 
doi:10.2312/egwr/egsr06/245-250 fatcat:hgym6v4qpjhq3lkproko6ryezm
« Previous Showing results 1 — 15 out of 5,438 results