research-article

Effects of global illumination approximations on material appearance

Authors:

Jaroslav Křivánek,

James A. Ferwerda, and

Kavita BalaAuthors Info & Claims

ACM Transactions on Graphics (TOG), Volume 29, Issue 4

Article No.: 112, Pages 1 - 10

https://doi.org/10.1145/1778765.1778849

Published: 26 July 2010 Publication History

Abstract

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.

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The auxiliary material consists of the following files: giperception-supplementary.pdf - Additional information on experiment design and results stimulus2.max - 3ds max model of the art gallery cafe scene used to create the stimulus images

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Cited By

Mišiak MFuhrmann ALatoschik M(2023)The Impact of Reflection Approximations on Visual Quality in Virtual RealityACM Symposium on Applied Perception 202310.1145/3605495.3605794(1-11)Online publication date: 5-Aug-2023
https://dl.acm.org/doi/10.1145/3605495.3605794
Subias JLagunas M(2023)In‐the‐wild Material Appearance Editing using Perceptual AttributesComputer Graphics Forum10.1111/cgf.1476542:2(333-345)Online publication date: 23-May-2023
https://doi.org/10.1111/cgf.14765
Delanoy JLagunas MCondor JGutierrez DMasia B(2022)A Generative Framework for Image‐based Editing of Material Appearance using Perceptual AttributesComputer Graphics Forum10.1111/cgf.1444641:1(453-464)Online publication date: 2-Feb-2022
https://doi.org/10.1111/cgf.14446
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Index Terms

Effects of global illumination approximations on material appearance
1. Computing methodologies
  1. Computer graphics
    1. Image manipulation
      1. Texturing

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Published In

cover image ACM Transactions on Graphics

ACM Transactions on Graphics Volume 29, Issue 4

July 2010

942 pages

ISSN:0730-0301

EISSN:1557-7368

DOI:10.1145/1778765

Issue’s Table of Contents

Copyright © 2010 ACM.

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Publication History

Published: 26 July 2010

Published in TOG Volume 29, Issue 4

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Cited By

Mišiak MFuhrmann ALatoschik M(2023)The Impact of Reflection Approximations on Visual Quality in Virtual RealityACM Symposium on Applied Perception 202310.1145/3605495.3605794(1-11)Online publication date: 5-Aug-2023
https://dl.acm.org/doi/10.1145/3605495.3605794
Subias JLagunas M(2023)In‐the‐wild Material Appearance Editing using Perceptual AttributesComputer Graphics Forum10.1111/cgf.1476542:2(333-345)Online publication date: 23-May-2023
https://doi.org/10.1111/cgf.14765
Delanoy JLagunas MCondor JGutierrez DMasia B(2022)A Generative Framework for Image‐based Editing of Material Appearance using Perceptual AttributesComputer Graphics Forum10.1111/cgf.1444641:1(453-464)Online publication date: 2-Feb-2022
https://doi.org/10.1111/cgf.14446
Lavoué GBonneel NFarrugia JSoler C(2021)Perceptual quality of BRDF approximations: dataset and metricsComputer Graphics Forum10.1111/cgf.14263640:2(327-338)Online publication date: 4-Jun-2021
https://doi.org/10.1111/cgf.142636
Li JShen Y(2020)Stage Lighting Simulation Based on Epipolar Sampling2020 International Conference on Culture-oriented Science & Technology (ICCST)10.1109/ICCST50977.2020.00113(546-551)Online publication date: Oct-2020
https://doi.org/10.1109/ICCST50977.2020.00113
Mao RLagunas MMasia BGutierrez D(2019)The Effect of Motion on the Perception of Material AppearanceACM Symposium on Applied Perception 201910.1145/3343036.3343122(1-9)Online publication date: 19-Sep-2019
https://dl.acm.org/doi/10.1145/3343036.3343122
Lagunas MMalpica SSerrano AGarces EGutierrez DMasia B(2019)A similarity measure for material appearanceACM Transactions on Graphics10.1145/3306346.332303638:4(1-12)Online publication date: 12-Jul-2019
https://dl.acm.org/doi/10.1145/3306346.3323036
Zell EZibrek KMcDonnell R(2019)Perception of virtual charactersACM SIGGRAPH 2019 Courses10.1145/3305366.3328101(1-17)Online publication date: 28-Jul-2019
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Pan XArellano VJarabo A(2019)Transient instant radiosity for efficient time-resolved global illuminationComputers and Graphics10.1016/j.cag.2019.07.00983:C(107-113)Online publication date: 1-Oct-2019
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Lavoué GCordier FSeo HLarabi M(2018)Visual Attention for Rendered 3D ShapesComputer Graphics Forum10.1111/cgf.1335337:2(191-203)Online publication date: 22-May-2018
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