Time-Varying BTFs

In proceedings of Central European Seminar on Computer Graphics for Students (CESCG 2010), May 2010
 

Abstract

There have been several approaches to model and capture time-varying materials. Modeling approaches provide good results but are sometimes hard to apply because underlying processes are not yet understood or very complex. In this paper, we present a data-driven approach to record aging effects of metal and car paint with the help of Bidirectional Texture Functions. BTFs precisely capture spatially varying reflectance properties of a given material. However, once captured, one cannot change the appearance of a material that ages. Instead, we measure at several distinct aging steps and combine this information into a time-varying BTF which allows the user to interpolate between different stages of the aging process.

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Bibtex

@INPROCEEDINGS{Students-2010-TimeVarying,
     author = {Langenbucher, Tobias and Merzbach, Sebastian and M{\"o}ller, David and Ochmann, Sebastian and Vock,
               Richard and Warnecke, Welf and Zschippig, Michael},
      title = {Time-Varying BTFs},
  booktitle = {Central European Seminar on Computer Graphics for Students (CESCG 2010)},
       year = {2010},
      month = may,
   abstract = {There have been several approaches to model and capture time-varying materials. Modeling approaches
               provide good results but are sometimes hard to apply because underlying processes are not yet
               understood or very complex. In this paper, we present a data-driven approach to record aging effects
               of metal and car paint with the help of Bidirectional Texture Functions. BTFs precisely capture
               spatially
               varying reflectance properties of a given material. However, once captured, one cannot change the
               appearance of a material that ages. Instead, we measure at several distinct aging steps and combine
               this information into a time-varying BTF which allows the user to interpolate between different
               stages of the aging process.}
}