Towards Effective Measurement and Interpolation of Bidirectional Texture Functions

0358919 - ÚTIA 2012 CZ eng V - Výzkumná zpráva
Filip, Jiří
Towards Effective Measurement and Interpolation of Bidirectional Texture Functions.
Praha: ÚTIA AV ČR, v.v.i, 2011. 8 s. Research Report, 2298.
Grant CEP: GA ČR GA102/08/0593; GA ČR 103/11/0335
GRANT EU: European Commission(XE) 239294 - PASIMA
Grant ostatní: fond rozvoje sdružení CESNET(CZ) 306; fond rozvoje sdružení CESNET(CZ) 387
Výzkumný záměr: CEZ:AV0Z10750506
Klíčová slova: bidirectional texture function * measurement systems * illumination
Kód oboru RIV: BD - Teorie informace

Bidirectional texture function (BTF) is acquired by taking thousands of material surface images for different illumination and viewing directions. This function, provided it is measured accurately, is typically exploited for visualization of material appearance in visual accuracy demanding applications. However, accurate measurement of the BTF is time and resources demanding task. While the sampling of illumination and viewing directions is in all known measurement systems done uniformly, we believe that to be more effective the sampling should be tailored specifically to reflectance properties of materials to be measured. Hence, we introduce a novel method of sparse BTF sampling. The method starts with collecting information about material visual behavior by means of small initial subset of reflectance samples measurement and analysis. This information is fed into our heuristic algorithm producing sparse material dependent sampling that is consequently used for BTF measurement and interpolation.
Trvalý link: http://hdl.handle.net/11104/0196827