Adaptive Measurement of Anisotropic Material Appearance

0479793 - ÚTIA 2018 RIV DE eng C - Konferenční příspěvek (zahraniční konf.)
Vávra, Radomír - Filip, Jiří
Adaptive Measurement of Anisotropic Material Appearance.
Pacific Graphics Short Papers. Goslar: The Eurographics Association, 2017 - (Barbic, J.; Lin, W.; Sorkine-Hornung, O.), s. 1-6, č. článku 1. ISBN 978-3-03868-051-2.
[The 25th Pacific Conference on Computer Graphics and Applications. Taipei (TW), 16.10.2017-19.10.2017]
Grant CEP: GA ČR GA17-18407S
Institucionální podpora: RVO:67985556
Klíčová slova: Three-Dimensional Graphics and Realism-Color, shading, shadowing, and texture * Digitization and Image Capture-Reflectance * BRDF
Obor OECD: Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)
http://library.utia.cas.cz/separaty/2017/RO/vavra-0479793.pdf

We present a practical adaptive method for acquisition of the anisotropic BRDF. It is based on a sparse adaptive measurement of the complete four-dimensional BRDF space by means of one-dimensional slices which form a sparse four-dimensional structure in the BRDF space and which can be measured by continuous movements of a light source and a sensor. Such a sampling approach is advantageous especially for gonioreflectometer-based measurement devices where the mechanical travel of a light source and a sensor creates a significant time constraint. In order to evaluate our method, we perform adaptive measurements of three materials and we simulate adaptive measurements of ten others. We achieve a four-times lower reconstruction error in comparison with the regular non-adaptive BRDF measurements given the same count of measured samples. Our method is almost twice better than a previous adaptive method, and it requires from two- to five-times less samples to achieve the same results as alternative approaches.
Trvalý link: http://hdl.handle.net/11104/0276753


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