Title: Patch-based sparse reconstruction of material BTFs
Authors: Brok, Dennis den
Steinhausen, Heinz Christian
Hullin, Matthias
Klein, Reinhard
Citation: Journal of WSCG. 2014, vol. 22, no. 2, p. 83-90.
Issue Date: 2014
Publisher: Václav Skala - UNION Agency
Document type: článek
URI: http://wscg.zcu.cz/WSCG2014/!!_2014-Journal-No-2.pdf
ISSN: 1213–6972 (hardcopy)
1213–6980 (CD-ROM)
1213–6964 (online)
Keywords: funkce obousměrných textur;řídké akvizice;rekonstrukce obrazu
Keywords in different language: bidirectional texture functions;sparse acquisition;image reconstruction
Abstract: We propose a simple and efficient method to reconstruct materials’ bidirectional texture functions (BTFs) from angularly sparse measurements. The key observation is that materials of similar types exhibit both similar surface structure and reflectance properties. We exploit this by manually clustering an existing database of fully measured material BTFs and fitting a linear model to each of the clusters. The models are computed not on per-texel data but on small spatial BTF patches we call apparent BTFs. Sparse reconstruction can then be performed by solving a linear least-squares problem without any regularization, using a per-cluster sampling strategy derived from the models. We demonstrate that our method is capable of faithfully reconstructing fully resolved BTFs from sparse measurements for a wide range of materials.
Rights: © Václav Skala - UNION Agency
Appears in Collections:Volume 22, Number 2 (2014)

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Please use this identifier to cite or link to this item: http://hdl.handle.net/11025/11904

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