IEICE TRANSACTIONS on Information
Efficient Hair Rendering under Dynamic, Low-Frequency Environmental Light Using Spherical Harmonics
Summary :
We present an algorithm for efficient rendering of animated hair under a dynamic, low-frequency lighting environment. We use spherical harmonics (SH) to represent the environmental light. The transmittances between a point on a hair strand and the light sources are also represented by SH functions. Then, a convolution of SH functions and the scattering function of a hair strand is precomputed. This allows us to efficiently compute the intensity at a point on the hair. However, the computation of the transmittance is very time-consuming. We address this problem by using a voxel-based approach: the transmittance is computed by using a voxelized hair model. We further accelerate the computation by sampling the voxels. By using our method, we can render a hair model consisting of tens of thousands of hair strands at interactive frame rates.
- Publication
- IEICE TRANSACTIONS on Information Vol.E98-D No.2 pp.404-411
- Publication Date
- 2015/02/01
- Publicized
- 2014/10/29
- Online ISSN
- 1745-1361
- DOI
- 10.1587/transinf.2014EDP7203
- Type of Manuscript
- PAPER
- Category
- Computer Graphics
Authors
Xiaoxiong XING
Hokkaido University
Yoshinori DOBASHI
Hokkaido University,CREST, JST
Tsuyoshi YAMAMOTO
Hokkaido University
Yosuke KATSURA
OLM Digital
Ken ANJYO
CREST, JST,OLM Digital
Keyword
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Xiaoxiong XING, Yoshinori DOBASHI, Tsuyoshi YAMAMOTO, Yosuke KATSURA, Ken ANJYO, "Efficient Hair Rendering under Dynamic, Low-Frequency Environmental Light Using Spherical Harmonics" in IEICE TRANSACTIONS on Information,
vol. E98-D, no. 2, pp. 404-411, February 2015, doi: 10.1587/transinf.2014EDP7203.
Abstract: We present an algorithm for efficient rendering of animated hair under a dynamic, low-frequency lighting environment. We use spherical harmonics (SH) to represent the environmental light. The transmittances between a point on a hair strand and the light sources are also represented by SH functions. Then, a convolution of SH functions and the scattering function of a hair strand is precomputed. This allows us to efficiently compute the intensity at a point on the hair. However, the computation of the transmittance is very time-consuming. We address this problem by using a voxel-based approach: the transmittance is computed by using a voxelized hair model. We further accelerate the computation by sampling the voxels. By using our method, we can render a hair model consisting of tens of thousands of hair strands at interactive frame rates.
URL: https://global.ieice.org/en_transactions/information/10.1587/transinf.2014EDP7203/_p
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@ARTICLE{e98-d_2_404,
author={Xiaoxiong XING, Yoshinori DOBASHI, Tsuyoshi YAMAMOTO, Yosuke KATSURA, Ken ANJYO, },
journal={IEICE TRANSACTIONS on Information},
title={Efficient Hair Rendering under Dynamic, Low-Frequency Environmental Light Using Spherical Harmonics},
year={2015},
volume={E98-D},
number={2},
pages={404-411},
abstract={We present an algorithm for efficient rendering of animated hair under a dynamic, low-frequency lighting environment. We use spherical harmonics (SH) to represent the environmental light. The transmittances between a point on a hair strand and the light sources are also represented by SH functions. Then, a convolution of SH functions and the scattering function of a hair strand is precomputed. This allows us to efficiently compute the intensity at a point on the hair. However, the computation of the transmittance is very time-consuming. We address this problem by using a voxel-based approach: the transmittance is computed by using a voxelized hair model. We further accelerate the computation by sampling the voxels. By using our method, we can render a hair model consisting of tens of thousands of hair strands at interactive frame rates.},
keywords={},
doi={10.1587/transinf.2014EDP7203},
ISSN={1745-1361},
month={February},}
Copy
TY - JOUR
TI - Efficient Hair Rendering under Dynamic, Low-Frequency Environmental Light Using Spherical Harmonics
T2 - IEICE TRANSACTIONS on Information
SP - 404
EP - 411
AU - Xiaoxiong XING
AU - Yoshinori DOBASHI
AU - Tsuyoshi YAMAMOTO
AU - Yosuke KATSURA
AU - Ken ANJYO
PY - 2015
DO - 10.1587/transinf.2014EDP7203
JO - IEICE TRANSACTIONS on Information
SN - 1745-1361
VL - E98-D
IS - 2
JA - IEICE TRANSACTIONS on Information
Y1 - February 2015
AB - We present an algorithm for efficient rendering of animated hair under a dynamic, low-frequency lighting environment. We use spherical harmonics (SH) to represent the environmental light. The transmittances between a point on a hair strand and the light sources are also represented by SH functions. Then, a convolution of SH functions and the scattering function of a hair strand is precomputed. This allows us to efficiently compute the intensity at a point on the hair. However, the computation of the transmittance is very time-consuming. We address this problem by using a voxel-based approach: the transmittance is computed by using a voxelized hair model. We further accelerate the computation by sampling the voxels. By using our method, we can render a hair model consisting of tens of thousands of hair strands at interactive frame rates.
ER -
English
