Evaluating Physical and Rendered Material Appearance

0490440 - ÚTIA 2019 RIV DE eng J - Journal Article
Filip, Jiří - Kolafová, Martina - Havlíček, Michal - Vávra, Radomír - Haindl, Michal - Rushmeier, H.
Evaluating Physical and Rendered Material Appearance.
Visual Computer. Roč. 34, 6-8 (2018), s. 805-816. ISSN 0178-2789. E-ISSN 1432-2315.
[CGI - Computer Graphics International. Bintan, 11.06.2018-14.06.2018]
R&D Projects: GA ČR GA17-18407S
Grant - others:US National Science Foundation Grant(US) IIS-1218515
Institutional support: RVO:67985556
Keywords : Material appearance Psychophysics * Rendering * BTF * Perception * Psychophysics * MAM2014
OECD category: Electrical and electronic engineering
Impact factor: 1.415, year: 2018
http://library.utia.cas.cz/separaty/2018/RO/filip-0490440.pdf

Many representations and rendering techniques have been proposed for presenting material appearance in computer graphics. One outstanding problem is evaluating their accuracy. In this paper, we propose assessing accuracy by comparing human judgements of material attributes made when viewing a computer graphics rendering to those made when viewing a physical sample of the same material. We demonstrate this approach using 16 diverse physical material samples distributed to researchers at the MAM 2014 workshop. We performed two psychophysical experiments. In the first experiment we examined how consistently subjects rate a set of twelve visual, tactile and subjective attributes of individual physical material specimens. In the second experiment, we asked subjects to assess the same attributes for identical materials rendered as BTFs under point-light and environment illuminations. By analyzing obtained data, we identified which material attributes and material types are judged consistently and to what extent the computer graphics representation conveyed the experience of viewing physical material appearance.
Permanent Link: http://hdl.handle.net/11104/0284810