Original title: A Portable Setup for Fast Material Appearance Acquisition
Authors: Filip, Jiří ; Vávra, Radomír ; Krupička, Mikuláš
Document type: Research reports
Year: 2014
Language: eng
Series: Research Report, volume: 2342
Abstract: 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.
Keywords: ABRDF; BTF; material appearance; measurement setup; visual psychophysics
Project no.: 239294, GA14-02652S (CEP), GAP103/11/0335 (CEP)
Funding provider: EC FP7, European Reintegration Grant, GA ČR, GA ČR

Institution: Institute of Information Theory and Automation AS ČR (web)
Document availability information: Fulltext is available at external website.
External URL: http://library.utia.cas.cz/separaty/2014/RO/filip-0430591.pdf
Original record: http://hdl.handle.net/11104/0236063

Permalink: http://www.nusl.cz/ntk/nusl-175199


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