RealPigment: Paint compositing by example

Jingwan Lu, Stephen DiVerdi, Willa A. Chen, Connelly Barnes, Adam Finkelstein

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Scopus citations

Abstract

The color of composited pigments in digital painting is generally computed one of two ways: either alpha blending in RGB, or the Kubelka-Munk equation (KM). The former fails to reproduce paint like appearances, while the latter is difficult to use. We present a data-driven pigment model that reproduces arbitrary compositing behavior by interpolating sparse samples in a high dimensional space. The input is an of a color chart, which provides the composition samples. We propose two different prediction algorithms, one doing simple interpolation using radial basis functions (RBF), and another that trains a parametric model based on the KM equation to compute novel values. We show that RBF is able to reproduce arbitrary compositing behaviors, even non-paint-like such as additive blending, while KM compositing is more robust to acquisition noise and can generalize results over a broader range of values.

Original languageEnglish (US)
Title of host publicationNPAR 2014 - Proceedings of the Workshop on Non-Photorealistic Animation and Rendering - Joint Symposium on Computational Aesthetics and Sketch-Based Interfaces and Modeling and Non-Photorealistic Animation and Rendering, Expressive 2014
EditorsStephen N. Spencer
PublisherAssociation for Computing Machinery
Pages21-30
Number of pages10
ISBN (Electronic)9781450330206
DOIs
StatePublished - Aug 8 2014
EventWorkshop on Non-Photorealistic Animation and Rendering, NPAR 2014 - 4th Joint Symposium on Computational Aesthetics and Sketch-Based Interfaces and Modeling and Non-Photorealistic Animation and Rendering, Expressive 2014 - Vancouver, Canada
Duration: Aug 8 2014Aug 10 2014

Publication series

NameNPAR Symposium on Non-Photorealistic Animation and Rendering
Volume2014-January

Other

OtherWorkshop on Non-Photorealistic Animation and Rendering, NPAR 2014 - 4th Joint Symposium on Computational Aesthetics and Sketch-Based Interfaces and Modeling and Non-Photorealistic Animation and Rendering, Expressive 2014
CountryCanada
CityVancouver
Period8/8/148/10/14

All Science Journal Classification (ASJC) codes

  • Applied Mathematics
  • Computer Graphics and Computer-Aided Design
  • Computer Science Applications
  • Modeling and Simulation

Keywords

  • Color
  • Compositing
  • Kubelka munk
  • Paint
  • Pigment

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  • Cite this

    Lu, J., DiVerdi, S., Chen, W. A., Barnes, C., & Finkelstein, A. (2014). RealPigment: Paint compositing by example. In S. N. Spencer (Ed.), NPAR 2014 - Proceedings of the Workshop on Non-Photorealistic Animation and Rendering - Joint Symposium on Computational Aesthetics and Sketch-Based Interfaces and Modeling and Non-Photorealistic Animation and Rendering, Expressive 2014 (pp. 21-30). (NPAR Symposium on Non-Photorealistic Animation and Rendering; Vol. 2014-January). Association for Computing Machinery. https://doi.org/10.1145/2630397.2630401