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[BSD+04]  Illustrating Terrains using Direction of Slope and Lighting

Buchin:2004:ITD (In proceedings)
Author(s)Buchin K., Sousa M.C., Döllner J., Samavati F. and Walther M.
Title« Illustrating Terrains using Direction of Slope and Lighting »
In4[textsuperscript]th ICA Mountain Cartography Workshop in Vall de Núria, Catalunya, Spain, 30. September--2. October 2004)
Year2004
URLhttp://pages.cpsc.ucalgary.ca/~mario/projects/2004/MCW/

Abstract
Landscape illustrations and cartographic maps depict terrain surface in a qualitatively effective way. In this paper, we present a framework for line drawing techniques for automatically reproducing traditional illustrations of terrain by means of slope lines and tonal variations. Given a digital elevation model, surface measures are computed and slope lines of the terrain are hierarchically traced and stored. At run-time slope lines are rendered by stylized procedural and texture-based strokes. The stroke density of the final image is determined according to the light intensities. Using a texture based approach, the line drawing pipeline is encapsulated from the rendering of the terrain geometry. Our system operates on terrain data at interactive rates while maintaining frame-to-frame coherence.

BibTeX code
@inproceedings{Buchin:2004:ITD,
  opteditor = {},
  optpostscript = {},
  www = {http://page.mi.fu-berlin.de/~buchin/proj/line_drawings_terrain/},
  optaddress = {},
  optorganization = {},
  author = {Kevin Buchin and Sousa, Mario Costa and J{\"u}rgen D{\"o}llner and
            Faramarz F. Samavati and Maike Walther},
  optkey = {},
  optannote = {},
  optseries = {},
  url = {http://pages.cpsc.ucalgary.ca/~mario/projects/2004/MCW/},
  optpublisher = {},
  localfile = {papers/Buchin.2004.ITD.pdf},
  optisbn = {},
  optmonth = {},
  optciteseer = {},
  optdoi = {},
  optpages = {},
  optcrossref = {},
  booktitle = {4\textsuperscript{th} ICA Mountain Cartography Workshop in Vall
               de N{\'u}ria, Catalunya, Spain, 30. September--2. October 2004)},
  optvolume = {},
  optnumber = {},
  abstract = {Landscape illustrations and cartographic maps depict terrain
              surface in a qualitatively effective way. In this paper, we
              present a framework for line drawing techniques for automatically
              reproducing traditional illustrations of terrain by means of slope
              lines and tonal variations. Given a digital elevation model,
              surface measures are computed and slope lines of the terrain are
              hierarchically traced and stored. At run-time slope lines are
              rendered by stylized procedural and texture-based strokes. The
              stroke density of the final image is determined according to the
              light intensities. Using a texture based approach, the line
              drawing pipeline is encapsulated from the rendering of the terrain
              geometry. Our system operates on terrain data at interactive rates
              while maintaining frame-to-frame coherence.},
  title = {{I}llustrating {T}errains using {D}irection of {S}lope and
           {L}ighting},
  year = {2004},
}

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