Downsampling scattering parameters for rendering anisotropic media
Name
multires_asia.pdf
Description
Accepted version
Size
21.17 MB
Format
Adobe PDF
Checksum (MD5)
b5f2338aa4fa29c53b3d5e2aca62ad92
Author(s)
Zhao, Shuang
Wu, Lifan
Durand, Frédo
Ramamoorthi, Ravi
Date Issued
2016
Journal
ACM Transactions on Graphics
Publisher
Association for Computing Machinery (ACM)
Citation
Zhao, Shuang, et al. "Downsampling Scattering Parameters for Rendering Anisotropic Media." Acm Transactions on Graphics 35 6 (2016): 11.
Version
Author's final manuscript
Abstract
© 2016 ACM. Volumetric micro-appearance models have provided remarkably high-quality renderings, but are highly data intensive and usually require tens of gigabytes in storage. When an object is viewed from a distance, the highest level of detail offered by these models is usually unnecessary, but traditional linear downsampling weakens the object's intrinsic shadowing structures and can yield poor accuracy. We introduce a joint optimization of single-scattering albedos and phase functions to accurately downsample heterogeneous and anisotropic media. Our method is built upon scaled phase functions, a new representation combining abledos and (standard) phase functions. We also show that modularity can be exploited to greatly reduce the amortized optimization overhead by allowing multiple synthesized models to share one set of downsampled parameters. Our optimized parameters generalize well to novel lighting and viewing configurations, and the resulting data sets offer several orders of magnitude storage savings.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Computer Science and Artificial Intelligence Laboratory
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1145/2980179.2980228
