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Illustrative Membrane Clipping

Åsmund Birkeland, Stefan Bruckner, Andrea Brambilla and Ivan Viola

JOURNAL ARTICLE: Computer Graphics Forum, vol. 31, no. 3, pp. 905–914, 2012. DOI: 10.1111/j.1467-8659.2012.03083.x

Abstract

Clipping is a fast, common technique for resolving occlusions. It only requires simple interaction, is easily understandable, and thus has been very popular for volume exploration. However, a drawback of clipping is that the technique indiscriminately cuts through features. Illustrators, for example, consider the structures in the vicinity of the cut when visualizing complex spatial data and make sure that smaller structures near the clipping plane are kept in the image and not cut into fragments. In this paper we present a new technique, which combines the simple clipping interaction with automated selective feature preservation using an elastic membrane. In order to prevent cutting objects near the clipping plane, the deformable membrane uses underlying data properties to adjust itself to salient structures. To achieve this behaviour, we translate data attributes into a potential field which acts on the membrane, thus moving the problem of deformation into the soft-body dynamics domain. This allows us to exploit existing GPU-based physics libraries which achieve interactive frame rates. For manual adjustment, the user can insert additional potential fields, as well as pinning the membrane to interesting areas. We demonstrate that our method can act as a flexible and non-invasive replacement of traditional clipping planes.

Published

Computer Graphics Forum

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BibTeX

@ARTICLE{Birkeland-2012-IMC,
  author = {{\AA}smund Birkeland and Stefan Bruckner and Andrea Brambilla and
	Ivan Viola},
  title = {Illustrative Membrane Clipping},
  journal = {Computer Graphics Forum},
  year = {2012},
  volume = {31},
  pages = {905--914},
  number = {3},
  month = jun,
  abstract = {Clipping is a fast, common technique for resolving occlusions. It
	only requires simple interaction, is easily understandable, and thus
	has been very popular for volume exploration. However, a drawback
	of clipping is that the technique indiscriminately cuts through features.
	Illustrators, for example, consider the structures in the vicinity
	of the cut when visualizing complex spatial data and make sure that
	smaller structures near the clipping plane are kept in the image
	and not cut into fragments. In this paper we present a new technique,
	which combines the simple clipping interaction with automated selective
	feature preservation using an elastic membrane. In order to prevent
	cutting objects near the clipping plane, the deformable membrane
	uses underlying data properties to adjust itself to salient structures.
	To achieve this behaviour, we translate data attributes into a potential
	field which acts on the membrane, thus moving the problem of deformation
	into the soft-body dynamics domain. This allows us to exploit existing
	GPU-based physics libraries which achieve interactive frame rates.
	For manual adjustment, the user can insert additional potential fields,
	as well as pinning the membrane to interesting areas. We demonstrate
	that our method can act as a flexible and non-invasive replacement
	of traditional clipping planes.},
  doi = {10.1111/j.1467-8659.2012.03083.x},
  event = {EuroVis 2012},
  keywords = {illustrative visualization, volume rendering, clipping},
  location = {Vienna, Austria},
  url = {http://www.cg.tuwien.ac.at/research/publications/2012/Birkeland-2012-IMC/}
}






 Last Modified: Stefan Bruckner, 2014-09-22