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DTSTAMP:20260114T163633Z
LOCATION:Darling Harbour Theatre\, Level 2 (Convention Centre)
DTSTART;TZID=Australia/Melbourne:20231212T093000
DTEND;TZID=Australia/Melbourne:20231212T124500
UID:siggraphasia_SIGGRAPH Asia 2023_sess209_papers_315@linklings.com
SUMMARY:Efficient Visualization of Light Pollution for the Night Sky
DESCRIPTION:Yoshinori Dobashi and Naoto Ishikawa (Hokkaido University, Pro
 metech CG Research) and Kei Iwasaki (Saitama University, Prometech CG Rese
 arch)\n\nThe artificial light sources make our daily life convenient, but 
 they cause a serious problem called light pollution. \nWe propose a system
  for efficient visualization of the light pollution for the night sky.\nA 
 number of methods have been proposed for rendering the sky, but most of th
 e methods focus on the rendering of the daytime or the sunset sky where th
 e sun is the only light source.\nFor the visualization of the light pollut
 ion, however, we have to take into account many city light sources on the 
 ground, resulting in expensive computational cost.\nWe address this proble
 m by precomputing a set of intensity distributions of the sky illuminated 
 by a city light for different locations and atmospheric conditions.\nWe ap
 ply the principal component analysis and the fast Fourier transform to the
  precomputed distributions, allowing us to efficiently visualize the light
  pollution.\nWe achieve one to two orders of magnitudes faster computation
  compared to a naive approach that accumulates the scattered intensity for
  each viewing ray. \nThis fast computation further allows us to interactiv
 ely solve an inverse problem that determines the city light intensity to r
 educe the light pollution.\nOur system provides the user with the forward 
 and the inverse investigation tool of the light pollution.\n\nRegistration
  Category: Full Access, Enhanced Access, Trade Exhibitor, Experience Hall 
 Exhibitor\n\n
URL:https://asia.siggraph.org/2023/full-program?id=papers_315&sess=sess209
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