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[CST+03]  A Simple Normal Enhancement Technique for Interactive Non-photorealistic Renderings

Cignoni:2003:SNE (Technical report)
Author(s)Cignoni P., Scopigno R. and Tarini M.
Title« A Simple Normal Enhancement Technique for Interactive Non-photorealistic Renderings »
Number2003-TR-18
InstitutionIstituto di Scienza e Tecnologia dell’Informazione, Consiglio Nazionale delle Ricerche
Year2003
AddressPisa, Italy
URLhttp://dienst.isti.cnr.it/Dienst/UI/2.0/Describe/ercim.cnr.isti/2003-TR-18

Abstract
We present a simple technique to improve the perception of the shape of an object. Bump mapping is well-known in the computer graphics community for providing the impression of small-scale geometrical features, which are not explicitly modelled. Here, we propose a similar approach (variation of normals) for the purpose of enhancing the perception of a given geometry. Our approach is based on a simple modification of the surface normals in order to enhance the geometric features of the object during the rendering. The enhanced normals produced by this approach can be used in any rendering technique. The technique presented is particularly well suited to improve the rendering of mechanical parts where common straightforward shading techniques can often generate shading ambiguities.

BibTeX code
@techreport{Cignoni:2003:SNE,
  optpostscript = {},
  number = {2003-TR-18},
  optnote = {},
  author = {Paolo Cignoni and Roberto Scopigno and Marco Tarini},
  optkey = {},
  optannote = {},
  opttype = {},
  url = {http://dienst.isti.cnr.it/Dienst/UI/2.0/Describe/ercim.cnr.isti/2003-TR-18},
  address = {Pisa, Italy},
  localfile = {papers/Cignoni.2003.SNE.pdf},
  optmonth = {},
  optciteseer = {},
  optdoi = {},
  optwww = {},
  title = {{A} {S}imple {N}ormal {E}nhancement {T}echnique for {I}nteractive
           {N}on-photorealistic {R}enderings},
  abstract = {We present a simple technique to improve the perception of the
              shape of an object. Bump mapping is well-known in the computer
              graphics community for providing the impression of small-scale
              geometrical features, which are not explicitly modelled. Here, we
              propose a similar approach (variation of normals) for the purpose
              of enhancing the perception of a given geometry. Our approach is
              based on a simple modification of the surface normals in order to
              enhance the geometric features of the object during the rendering.
              The enhanced normals produced by this approach can be used in any
              rendering technique. The technique presented is particularly well
              suited to improve the rendering of mechanical parts where common
              straightforward shading techniques can often generate shading
              ambiguities.},
  year = {2003},
  institution = {Istituto di Scienza e Tecnologia dell’Informazione, Consiglio
                 Nazionale delle Ricerche},
}

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