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Displaying 1-14 out of 14 total
Adding a Solar-Radiance Function to the Hošek-Wilkie Skylight Model
Found in: IEEE Computer Graphics and Applications
By Lukas Hosek,Alexander Wilkie
Issue Date:May 2013
pp. 44-52
One prerequisite for realistic renderings of outdoor scenes is the proper capturing of the sky's appearance. Currently, an explicit simulation of light scattering in the atmosphere isn't computationally feasible, and won't be in the foreseeable future. Cap...
 
Precise Construction and Control of Implicit Fillets in the BlobTree
Found in: Shape Modeling and Applications, International Conference on
By Herbert Grasberger, Andrea Weidlich, Alexander Wilkie, Brian Wyvill
Issue Date:June 2010
pp. 151-162
Skeletal implicit modelling systems have been used to design models of both organic and man-made structures, however existing systems lack convenient and accurate methods for users to define fillets when building prototype engineering models. In this work ...
 
A Multiresolution Mesh Generation Approach for Procedural Definition of Complex Geometry
Found in: Shape Modeling and Applications, International Conference on
By Robert F. Tobler, Stefan Maierhofer, Alexander Wilkie
Issue Date:May 2002
pp. 35
As a general approach to procedural mesh definition we propose two mechanisms for mesh modification: generalized subdivision and rule based mesh growing. In standard subdivision, a specific subdivision rule is applied to a mesh to get a succession of meshe...
 
A Multiresolution Mesh Generation Approach for Procedural Definition of Complex Geometry (color plates 1, 2, 3, 4, 5, and 6)
Found in: Shape Modeling and Applications, International Conference on
By Robert. F. Tobler, Stefan Maierhofer, Alexander Wilkie
Issue Date:May 2002
pp. 271
No summary available.
   
Polarised light in computer graphics
Found in: SIGGRAPH Asia 2012 Courses (SA '12)
By Alexander Wilkie, Andrea Weidlich
Issue Date:November 2012
pp. 1-87
In Computer Graphics, the polarisation properties of light currently play a role in several contexts: in certain forms of highly realistic ray-based image synthesis (sometimes colloquially referred to as Polarisation Ray Tracing), in some 3D display system...
     
An analytic model for full spectral sky-dome radiance
Found in: ACM Transactions on Graphics (TOG)
By Alexander Wilkie, Lukas Hosek
Issue Date:July 2012
pp. 1-9
We present a physically-based analytical model of the daytime sky. Based on the results of a first-principles brute force simulation of radiative transfer in the atmosphere, we use the same general approach of fitting basis function coefficients to radianc...
     
Thinking in layers: modeling with layered materials
Found in: SIGGRAPH Asia 2011 Courses (SA '11)
By Alexander Wilkie, Andrea Weidlich
Issue Date:December 2011
pp. 1-43
This course serves as a guide to the considerable potential of layered surface models that are available in many commercial products. The key advantage of using such layered materials over traditional shading language constructs is that the end result is h...
     
How to write a polarisation ray tracer
Found in: SIGGRAPH Asia 2011 Courses (SA '11)
By Alexander Wilkie, Andrea Weidlich
Issue Date:December 2011
pp. 1-36
Polarisation Ray Tracing is a bit like spectral rendering. You might have heard about it, but the technical details - what exactly it is all about, how it is best done, what the benefits are, where you ought to use it, and where you can safely omit it - ar...
     
A standardised polarisation visualisation for images
Found in: Proceedings of the 26th Spring Conference on Computer Graphics (SCCG '10)
By Alexander Wilkie, Andrea Weidlich
Issue Date:May 2010
pp. 43-50
We discuss issues surrounding the visualisation of the polarisation properties of light stored in the pixels of an image. In order to facilitate comparisons between the work of different researchers, and in order to aid the development and debugging of pol...
     
Predictive rendering
Found in: ACM SIGGRAPH ASIA 2009 Courses (SIGGRAPH ASIA '09)
By Alan Chalmers, Alexander Wilkie, Andrea Weidlich, Marcus Magnor
Issue Date:December 2009
pp. 1-428
This course intends to serve two closely related purposes: to provide an accurate definition of the term "predictive rendering" and to present the technological foundations for research in this area. The first goal of the course (a clear definition of the ...
     
Exploring the potential of layered BRDF models
Found in: ACM SIGGRAPH ASIA 2009 Courses (SIGGRAPH ASIA '09)
By Alexander Wilkie, Andrea Weidlich
Issue Date:December 2009
pp. 1-58
The key advantage of using layered BRDFs over traditional, more general shading-language constructs is that the automatic result is highly plausible. This course is a survey of the considerable potential of layered surface models. On a simple layered surfa...
     
Modeling aventurescent gems with procedural textures
Found in: Proceedings of the 24th Spring Conference on Computer Graphics (SCCG '08)
By Alexander Wilkie, Andrea Weidlich
Issue Date:April 2008
pp. 51-58
In this paper we present the results of an investigation on how one can model aventurescence, an interesting and optically appealing property of some gemstones. Our goal was to find a method that is both efficient and reasonably realistic, and that can sti...
     
Realistic rendering of birefringency in uniaxial crystals
Found in: ACM Transactions on Graphics (TOG)
By Alexander Wilkie
Issue Date:March 2008
pp. 1-12
In this article we derive the complete set of formulas needed to generate physically plausible images of uniaxial crystals. So far no computer graphics publication contains all the formulas one needs to compute the interaction of light with such crystals i...
     
Arbitrarily layered micro-facet surfaces
Found in: Proceedings of the 5th international conference on Computer graphics and interactive techniques in Australia and Southeast Asia (GRAPHITE '07)
By Alexander Wilkie
Issue Date:December 2007
pp. 171-178
In this paper we present a method to combine several micro-facet based surface layers into a single unified, expressive BRDF model that is easy to use. The restriction to micro-facet based layers constitutes no loss of generality, since both perfectly spec...
     
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