Measuring and modeling anisotropic reflection
SIGGRAPH '92 Proceedings of the 19th annual conference on Computer graphics and interactive techniques
The visible differences predictor: an algorithm for the assessment of image fidelity
Digital images and human vision
Proceedings of the 24th annual conference on Computer graphics and interactive techniques
Toward a psychophysically-based light reflection model for image synthesis
Proceedings of the 27th annual conference on Computer graphics and interactive techniques
Applying appearance standards to light reflection models
Proceedings of the 28th annual conference on Computer graphics and interactive techniques
Photographic tone reproduction for digital images
Proceedings of the 29th annual conference on Computer graphics and interactive techniques
Proceedings of the 29th annual conference on Computer graphics and interactive techniques
Interactive global illumination using fast ray tracing
EGRW '02 Proceedings of the 13th Eurographics workshop on Rendering
Perception-based global illumination, rendering, and animation techniques
SCCG '02 Proceedings of the 18th spring conference on Computer graphics
Lightcuts: a scalable approach to illumination
ACM SIGGRAPH 2005 Papers
Low-Level Image Cues in the Perception of Translucent Materials
ACM Transactions on Applied Perception (TAP)
Selective component-based rendering
GRAPHITE '05 Proceedings of the 3rd international conference on Computer graphics and interactive techniques in Australasia and South East Asia
ACM SIGGRAPH 2006 Papers
ACM SIGGRAPH 2006 Papers
Advanced Global Illumination
Matrix row-column sampling for the many-light problem
ACM SIGGRAPH 2007 papers
Visual equivalence: towards a new standard for image fidelity
ACM SIGGRAPH 2007 papers
The influence of shape on the perception of material reflectance
ACM SIGGRAPH 2007 papers
Perception of complex aggregates
ACM SIGGRAPH 2008 papers
Shape-dependent gloss correction
Proceedings of the 5th symposium on Applied perception in graphics and visualization
Imperfect shadow maps for efficient computation of indirect illumination
ACM SIGGRAPH Asia 2008 papers
How well do line drawings depict shape?
ACM SIGGRAPH 2009 papers
Perceptual influence of approximate visibility in indirect illumination
ACM Transactions on Applied Perception (TAP)
Virtual spherical lights for many-light rendering of glossy scenes
ACM SIGGRAPH Asia 2009 papers
Experimental analysis of BRDF models
EGSR'05 Proceedings of the Sixteenth Eurographics conference on Rendering Techniques
Incremental instant radiosity for real-time indirect illumination
EGSR'07 Proceedings of the 18th Eurographics conference on Rendering Techniques
Combining global and local virtual lights for detailed glossy illumination
ACM SIGGRAPH Asia 2010 papers
I3D '11 Symposium on Interactive 3D Graphics and Games
LightSlice: matrix slice sampling for the many-lights problem
Proceedings of the 2011 SIGGRAPH Asia Conference
Chromatic shadows for improved perception
Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Non-Photorealistic Animation and Rendering
Multidimensional image retargeting
SIGGRAPH Asia 2011 Courses
Real-time bidirectional path tracing via rasterization
I3D '12 Proceedings of the ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games
ACM Transactions on Graphics (TOG) - SIGGRAPH 2012 Conference Proceedings
Virtual ray lights for rendering scenes with participating media
ACM Transactions on Graphics (TOG) - SIGGRAPH 2012 Conference Proceedings
The State of the Art in Interactive Global Illumination
Computer Graphics Forum
Crowd Light: Evaluating the Perceived Fidelity of Illuminated Dynamic Scenes
Computer Graphics Forum
NoRM: No-Reference Image Quality Metric for Realistic Image Synthesis
Computer Graphics Forum
Light transport simulation with vertex connection and merging
ACM Transactions on Graphics (TOG) - Proceedings of ACM SIGGRAPH Asia 2012
Importance point projection for GPU-based final gathering
EGSR'11 Proceedings of the Twenty-second Eurographics conference on Rendering
Approximate Bias Compensation for Rendering Scenes with Heterogeneous Participating Media
Computer Graphics Forum
Analysis of human gaze interactions with texture and shape
MUSCLE'11 Proceedings of the 2011 international conference on Computational Intelligence for Multimedia Understanding
Gloss perception in painterly and cartoon rendering
ACM Transactions on Graphics (TOG)
Understanding the role of phase function in translucent appearance
ACM Transactions on Graphics (TOG)
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Rendering applications in design, manufacturing, ecommerce and other fields are used to simulate the appearance of objects and scenes. Fidelity with respect to appearance is often critical, and calculating global illumination (GI) is an important contributor to image fidelity; but it is expensive to compute. GI approximation methods, such as virtual point light (VPL) algorithms, are efficient, but they can induce image artifacts and distortions of object appearance. In this paper we systematically study the perceptual effects on image quality and material appearance of global illumination approximations made by VPL algorithms. In a series of psychophysical experiments we investigate the relationships between rendering parameters, object properties and image fidelity in a VPL renderer. Using the results of these experiments we analyze how VPL counts and energy clamping levels affect the visibility of image artifacts and distortions of material appearance, and show how object geometry and material properties modulate these effects. We find the ranges of these parameters that produce VPL renderings that are visually equivalent to reference renderings. Further we identify classes of shapes and materials that cannot be accurately rendered using VPL methods with limited resources. Using these findings we propose simple heuristics to guide visually equivalent and efficient rendering, and present a method for correcting energy losses in VPL renderings. This work provides a strong perceptual foundation for a popular and efficient class of GI algorithms.