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A Portable Setup for Fast Material Appearance Acquisition
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SYSNO ASEP 0430591 Document Type V - Research Report R&D Document Type The record was not marked in the RIV Title A Portable Setup for Fast Material Appearance Acquisition Author(s) Filip, Jiří (UTIA-B) RID, ORCID
Vávra, Radomír (UTIA-B) RID, ORCID
Krupička, Mikuláš (UTIA-B) RIDIssue data Praha: ÚTIA AV ČR, 2014 Series Research Report Series number 2342 Number of pages 7 s. Publication form Online - E Language eng - English Country CZ - Czech Republic Keywords measurement setup ; BTF ; ABRDF ; visual psychophysics ; material appearance Subject RIV BD - Theory of Information R&D Projects GA14-02652S GA ČR - Czech Science Foundation (CSF) GAP103/11/0335 GA ČR - Czech Science Foundation (CSF) Institutional support UTIA-B - RVO:67985556 Annotation A photo-realistic representation of material appearance can be achieved by means of bidirectional texture function (BTF) capturing a material's appearance for varying illumination, viewing directions, and spatial pixel coordinates. BTF captures many non-local effects in material structure such as inter-reflections, occlusions, shadowing, or scattering. The acquisition of BTF data is usually time and resource-intensive due to the high dimensionality of BTF data. This results in expensive, complex measurement setups and/or excessively long measurement times. We propose an approximate BTF acquisition setup based on a simple, affordable mechanical gantry containing a consumer camera and two LED lights. It captures a very limited subset of material surface images by shooting several video sequences. A psychophysical study comparing captured and reconstructed data with the reference BTFs of seven tested materials revealed that results of our method show a promising visual quality. Workplace Institute of Information Theory and Automation Contact Markéta Votavová, votavova@utia.cas.cz, Tel.: 266 052 201. Year of Publishing 2015
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