Rapid Material Appearance Acquisition Using Consumer Hardware
Institute of Information Theory and Automation of the ASCR, Prague 182 08 , Czech Republic
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Sensors 2014, 14(10), 19785-19805; https://doi.org/10.3390/s141019785
Received: 20 August 2014 / Revised: 8 October 2014 / Accepted: 9 October 2014 / Published: 22 October 2014
(This article belongs to the Section Physical Sensors)
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. Speed of the setup has been demonstrated on measurement of human skin and measurement and modeling of a glue dessication time-varying process. As it allows for fast, inexpensive, acquisition of approximate BTFs, this method can be beneficial to visualization applications demanding less accuracy, where BTF utilization has previously been limited.
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Keywords:
measurement setup; material appearance; BTF; ABRDF; visual psychophysics
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MDPI and ACS Style
Filip, J.; Vávra, R.; Krupička, M. Rapid Material Appearance Acquisition Using Consumer Hardware. Sensors 2014, 14, 19785-19805. https://doi.org/10.3390/s141019785
AMA Style
Filip J, Vávra R, Krupička M. Rapid Material Appearance Acquisition Using Consumer Hardware. Sensors. 2014; 14(10):19785-19805. https://doi.org/10.3390/s141019785
Chicago/Turabian StyleFilip, Jiří; Vávra, Radomír; Krupička, Mikuláš. 2014. "Rapid Material Appearance Acquisition Using Consumer Hardware" Sensors 14, no. 10: 19785-19805. https://doi.org/10.3390/s141019785
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