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SUMMARY:Photon Mapping - Ivan Chau
DTSTART:20111129T183000Z
DTEND:20111129T193000Z
UID:TALK33858@talks.cam.ac.uk
CONTACT:John Wickerson
DESCRIPTION:In computer graphics\, photon mapping is a two-pass global ill
 umination algorithm developed by Henrik Wann Jensen that solves the render
 ing equation. Rays from the light source and rays from the camera are trac
 ed independently until some termination criterion is met\, then they are c
 onnected in a second step to produce a radiance value. It is used to reali
 stically simulate the interaction of light with different objects. Specifi
 cally\, it is capable of simulating the refraction of light through a tran
 sparent substance such as glass or water\, diffuse interreflection between
  illuminated objects\, the subsurface scattering of light in translucent m
 aterials\, and some of the effects caused by particulate matter such as sm
 oke or water vapor. It can also be extended to more accurate simulations o
 f light such as spectral rendering.\n\nUnlike path tracing\, bidirectional
  path tracing and Metropolis light transport\, photon mapping is a "biased
 " rendering algorithm\, which means that averaging many renders using this
  method does not converge to a correct solution to the rendering equation.
  However\, since it is a consistent method\, a correct solution can be ach
 ieved by increasing the number of photons.
LOCATION:Club Room\, Churchill College
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