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