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DTSTAMP:20240214T070245Z
LOCATION:Meeting Room C4.8\, Level 4 (Convention Centre)
DTSTART;TZID=Australia/Melbourne:20231213T161000
DTEND;TZID=Australia/Melbourne:20231213T162500
UID:siggraphasia_SIGGRAPH Asia 2023_sess145_papers_315@linklings.com
SUMMARY:Efficient Visualization of Light Pollution for the Night Sky
DESCRIPTION:Technical Papers\n\nYoshinori Dobashi and Naoto Ishikawa (Hokk
 aido University, Prometech CG Research) and Kei Iwasaki (Saitama Universit
 y, Prometech CG Research)\n\nThe artificial light sources make our daily l
 ife convenient, but they cause a serious problem called light pollution. \
 nWe propose a system for efficient visualization of the light pollution fo
 r the night sky.\nA number of methods have been proposed for rendering the
  sky, but most of the methods focus on the rendering of the daytime or the
  sunset sky where the sun is the only light source.\nFor the visualization
  of the light pollution, however, we have to take into account many city l
 ight sources on the ground, resulting in expensive computational cost.\nWe
  address this problem by precomputing a set of intensity distributions of 
 the sky illuminated by a city light for different locations and atmospheri
 c conditions.\nWe apply the principal component analysis and the fast Four
 ier transform to the precomputed distributions, allowing us to efficiently
  visualize the light pollution.\nWe achieve one to two orders of magnitude
 s faster computation compared to a naive approach that accumulates the sca
 ttered intensity for each viewing ray. \nThis fast computation further all
 ows us to interactively solve an inverse problem that determines the city 
 light intensity to reduce the light pollution.\nOur system provides the us
 er with the forward and the inverse investigation tool of the light pollut
 ion.\n\nRegistration Category: Full Access\n\nSession Chair: Young J. Kim 
 (Ewha Womans University)
URL:https://asia.siggraph.org/2023/full-program?id=papers_315&sess=sess145
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