Real-Time Approximation of Photometric Polygonal Lights

Information

• Publication Type: Journal Paper with Conference Talk
• Workgroup(s)/Project(s):
  • Rendering and Modeling
  • VRVis Competence Center
• Date: May 2020
• Journal: Proceedings of the ACM on Computer Graphics and Interactive Techniques
• Volume: 3
• Call for Papers: Call for Paper
• DOI: 10.1145/3384537
• Event: ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games
• ISSN: 2577-6193
• Lecturer: Christian Luksch
• Location: online
• Number: 1
• Open Access: yes
• Conference date: 14. September 2020 – 18. September 2020
• Pages: 4.1 – 4.18
• Keywords: area lights, photometric lights, real-time rendering

Abstract

We present a real-time rendering technique for photometric polygonal lights. Our method uses a numerical integration technique based on a triangulation to calculate noise-free diffuse shading. We include a dynamic point in the triangulation that provides a continuous near-field illumination resembling the shape of the light emitter and its characteristics. We evaluate the accuracy of our approach with a diverse selection of photometric measurement data sets in a comprehensive benchmark framework. Furthermore, we provide an extension for specular reflection on surfaces with arbitrary roughness that facilitates the use of existing real-time shading techniques. Our technique is easy to integrate into real-time rendering systems and extends the range of possible applications with photometric area lights.

Additional Files and Images

Weblinks

• https://doi.org/10.1145/3384537
• Video
  Video
• Entry in reposiTUm (TU Wien Publication Database)
• DOI: 10.1145/3384537

BibTeX

@article{luksch_2020,
  title =      "Real-Time Approximation of Photometric Polygonal Lights",
  author =     "Christian Luksch and Lukas Prost and Michael Wimmer",
  year =       "2020",
  abstract =   "We present a real-time rendering technique for photometric
               polygonal lights. Our method uses a numerical integration
               technique based on a triangulation to calculate noise-free
               diffuse shading. We include a dynamic point in the
               triangulation that provides a continuous near-field
               illumination resembling the shape of the light emitter and
               its characteristics. We evaluate the accuracy of our
               approach with a diverse selection of photometric measurement
               data sets in a comprehensive benchmark framework.
               Furthermore, we provide an extension for specular reflection
               on surfaces with arbitrary roughness that facilitates the
               use of existing real-time shading techniques. Our technique
               is easy to integrate into real-time rendering systems and
               extends the range of possible applications with photometric
               area lights.",
  month =      may,
  journal =    "Proceedings of the ACM on Computer Graphics and Interactive
               Techniques",
  volume =     "3",
  doi =        "10.1145/3384537",
  issn =       "2577-6193",
  number =     "1",
  pages =      "4.1--4.18",
  keywords =   "area lights, photometric lights, real-time rendering",
  URL =        "https://www.cg.tuwien.ac.at/research/publications/2020/luksch_2020/",
}