Light Shapes: Perception-Based Visualizations of the Global Light Transport

Tatiana Kartashova, Susan te Pas, Huib de Ridder, Sylvia Pont

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

In computer graphics, illuminating a scene is a complex task, typically consisting of cycles of adjusting and rendering the scene to see the effects. We propose a technique for visualization of light as a tensor field via extracting its properties (i.e., intensity, direction, diffuseness) from (virtual) radiance measurements and showing these properties as a grid of shapes over a volume of a scene. Presented in the viewport, our visualizations give an understanding of the illumination conditions in the measured volume for both the local values and the global variations of light properties. Additionally, they allow quick inferences of the resulting visual appearance of (objects in) scenes without the need to render them. In our evaluation, observers performed at least as well using visualizations as using renderings when they were comparing illumination between parts of a scene and inferring the final appearance of objects in the measured volume. Therefore, the proposed visualizations are expected to help lighting artists by providing perceptually relevant information about the structure of the light field and flow in a scene.
Original languageEnglish
Article number4
Pages (from-to)1-17
Number of pages17
JournalACM Transactions on Applied Perception
Volume16
Issue number1
DOIs
Publication statusPublished - 2019

Keywords

  • Light transport
  • visualization
  • lighting design
  • perception

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