Perception-Guided Global Illumination Solution
for Animation Rendering
Karol Myszkowski,
Takehiro Tawara,
Hiroyuki Akamine and
Hans-Peter Seidel
Max-Planck-Institute for Computer Science
Appeared in the SIGGRAPH 2001 Conference Proceedings
Abstract
We present a method for efficient global illumination
computation in dynamic environments by taking advantage
of temporal coherence of lighting distribution. The method is
embedded in the framework of stochastic photon
tracing and density estimation techniques.
A locally operating energy-based error metric is used to
prevent photon processing in the temporal domain
for the scene regions in which lighting distribution
changes rapidly. A perception-based error metric
suitable for animation is used to keep
noise inherent in stochastic methods
below the sensitivity level of the human observer.
As a result a perceptually-consistent quality
across all animation frames is obtained.
Furthermore, the computation cost
is reduced compared to the traditional approaches
operating solely in the spatial domain.
Paper
Download the paper in
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Gzipped Postscript (ps.gz) [3.5 MB].
Copyright ACM 2001.
Animation examples for the room and atrium scenes:
Room
Spatial filtering: off
On average the same number of photons per frame was used.
In the case of 845,000 the same number of photons collected in the
spatial domain was used as in the case of perception-guided
approach for the temporal domain.
- Traditional approach: no temporal processing (25,000 photons/frame)
(mov) [0.5 MB]
(mpg) [0.4 MB]
- Traditional approach: no temporal processing (845,000 photons/frame)
(mov) [0.5 MB]
(mpg) [0.4 MB]
- Perception-based approach: with temporal processing (10,000-40,000 photons/frame)
(mov) [0.5 MB]
(mpg) [0.4 MB]
Atrium
Spatial filtering: on
On average the same number of photons per frame was used.
- Traditional approach: no temporal processing (20,000 photons/frame)
(mov) [1.7 MB]
(mpg) [0.8 MB]
- Perception-based approach: with temporal processing (10,000-40,000 photons/frame)
(mov) [1.7 MB]
(mpg) [0.8 MB]
(mov) is the QuickTime format with JPEG compression and half size.
(mpg) is the MPEG-1 format and half size.