1 Nara Institute of Science and Technology (NAIST), Japan,
2Toho University, Japan,
3 UEI research, Japan
Appeared in SIGGRAPH Asia '17.
Acquiring accurate scattering properties is critical for rendering translucent materials such as participating media.
In particular, the phase function, which determines the distribution of scattering directions, plays a significant role in the appearance of the material.
While there are many techniques to acquire BRDF, there are only a few methods for the non-parametric phase function.
We propose a distinctive scattering theory that approximates the effect of single scattering to acquire the non-parametric phase function from a single image. Furthermore, in various experiments, we measured the phase functions from several real diluted media and rendered images of these materials to evaluate the effectiveness of our theory.