|
Light Diffusion in Multi-Layered Translucent Materials
|
|
|
Craig Donner
Henrik Wann Jensen
|
|
University of California, San Diego
|
|
|
To appear in
Proceedings of ACM SIGGRAPH 2005, Los Angeles, USA, July 31 - August 4,
2005
|
|
|
Abstract
This paper introduces a shading model for light diffusion in multi-layered translucent materials. Previous work on
diffusion in translucent materials has assumed smooth semi-infinite homogeneous materials and solved for the scattering
of light using a dipole diffusion approximation. This approximation breaks down in the case of thin translucent slabs
and multi-layered materials. We present a new efficient technique based on multiple dipoles to account for
diffusion in thin slabs. We enhance this multipole theory to account for mismatching indices of refraction at the
top and bottom of of translucent slabs, and to model the effects of rough surfaces. To model multiple layers, we
extend this single slab theory by convolving the diffusion profiles of the individual slabs. We account for
multiple scattering between slabs by using a variant of Kubelka-Munk theory in frequency space. Our results
demonstrate diffusion of light in thin slabs and multi-layered materials such as paint, paper, and human skin.
|
|
|
Paper
PDF (6.3MB)
|
|
|
|
|
|
|
