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Hierarchical Subdivision of Light Distribution Model for Realistic Shadow Generation in Augmented Reality
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  • Journal title : Journal of Broadcast Engineering
  • Volume 21, Issue 1,  2016, pp.24-35
  • Publisher : The Korean Institute of Broadcast and Media Engineers
  • DOI : 10.5909/JBE.2016.21.1.24
 Title & Authors
Hierarchical Subdivision of Light Distribution Model for Realistic Shadow Generation in Augmented Reality
Kim, Iksu; Eem, Changkyoung; Hong, Hyunki;
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 Abstract
By estimating environment light distribution, we can generate realistic shadow images in AR(augmented reality). When we estimate light distribution without sensing equipment, environment light model, geometry of virtual object, and surface reflection property are needed. Previous study using 3D marker builds surrounding light environment with a geodesic dome model and analyzes shadow images. Because this method employs candidate shadow maps in initial scene setup, however, it is difficult to estimate precise light information. This paper presents a novel light estimation method based on hierarchical light distribution model subdivision. By using an overlapping area ratio of the segmented shadow and candidate shadow map, we can make hierarchical subdivision of light geodesic dome.
 Keywords
augmented reality;illumination distribution estimation;shadow segmentation;hierarchical subdivision;
 Language
Korean
 Cited by
 References
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