Towards Effective Measurement and Interpolation of Bidirectional Texture Functions

0358919 - ÚTIA 2012 CZ eng V - Research Report
Filip, Jiří
Towards Effective Measurement and Interpolation of Bidirectional Texture Functions.
Praha: ÚTIA AV ČR, v.v.i, 2011. 8 s. Research Report, 2298.
R&D Projects: GA ČR GA102/08/0593; GA ČR 103/11/0335
EU Projects: European Commission(XE) 239294 - PASIMA
Grant - others:fond rozvoje sdružení CESNET(CZ) 306; fond rozvoje sdružení CESNET(CZ) 387
Institutional research plan: CEZ:AV0Z10750506
Keywords : bidirectional texture function * measurement systems * illumination
Subject RIV: BD - Theory of Information

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.
Permanent Link: http://hdl.handle.net/11104/0196827