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Efficient Hair Rendering under Dynamic, Low-Frequency Environmental Light Using Spherical Harmonics

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/59625

Title: Efficient Hair Rendering under Dynamic, Low-Frequency Environmental Light Using Spherical Harmonics
Authors: Xing, Xiaoxiong Browse this author
Dobashi, Yoshinori Browse this author →KAKEN DB
Yamamoto, Tsuyoshi Browse this author →KAKEN DB
Katsura, Yosuke Browse this author
Anjyo, Ken Browse this author
Keywords: hair rendering
spherical harmonics
environmental light
voxelization
Issue Date: Feb-2015
Publisher: The Institute of Electronics, Information and Communication Engineers (IEICE)
Journal Title: IEICE transactions on information and systems
Volume: E98D
Issue: 2
Start Page: 404
End Page: 411
Publisher 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.
Rights: Copyright @2015 The Institute of Electronics, Information and Communication Engineers
Type: article
URI: http://hdl.handle.net/2115/59625
Appears in Collections:情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 土橋 宜典

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