Non-Photorealistic Computer Graphics Library

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Found 7 item(s) authored by "Nick Halper" .

Article A Developer's Guide to Silhouette Algorithms for Polygonal Models
Tobias Isenberg, Bert Freudenberg, Nick Halper, Stefan Schlechtweg, Thomas Strothotte.
IEEE Computer Graphics and Applications, Vol. 23, No. 4, pp. 28--37, July/August, 2003. [BibTeX]

Proceedings Creating Non-Photorealistic Images the Designer’s Way
Nick Halper, Stefan Schlechtweg, Thomas Strothotte.
2nd International Symposium on Non-Photorealistic Animation and Rendering (NPAR'02), Annecy, France, June 3-5, 2002. [BibTeX]

Proceedings OPENNPAR: A System for Developing, Programming, and Designing Non-Photorealistic Animation and Rendering
Nick Halper, Tobias Isenberg, Felix Ritter, Bert Freudenberg, Oscar E. Meruvia Pastor, Stefan Schlechtweg, Thomas Strothotte.
11th Pacific Conference on Computer Graphics and Applications (PG'03), pp. 424, Canmore, Canada, 2003. [BibTeX]

Proceedings Psychology and Non-Photorealistic Rendering: The Beginning of a Beautiful Relationship
Nick Halper, Mara Mellin, Christoph S. Herrmann, Thomas Strothotte, Volker Linneweber.
Mensch & Computer 2003: Interaktion in Bewegung, pp. 277--286, Teubner Verlag, 2003. [BibTeX]

Article Rendering and Affect
D.J. Duke, P.J. Barnard, Nick Halper, Mara Mellin.
Computer Graphics Forum, Vol. 22, No. 3, September, 2003. [BibTeX]

Article Stylizing Silhouettes at Interactive Rates: From Silhouette Edges to Silhouette Strokes

Author(s): Tobias Isenberg, Nick Halper, Thomas Strothotte.
Article: Computer Graphics Forum, 2002.
[BibTeX] Find this paper on Google

A way to create effective stylized line drawings is to draw strokes that start and stop at visible portions along the silhouette of an object to be portrayed. In computer graphics to date, algorithms to extract silhouette edges are many, although putting these edges into a form such that stylized strokes may be applied to them has not been greatly covered, so that existing methods are either time-consuming or presented vaguely. In this paper, we introduce an algorithm that takes a set of silhouette edges originating from polygonal meshes and efficiently computes the visible parts of the edges before connecting them to form long smooth silhouette strokes to which stylization algorithms may be effectively applied. Features of our algorithm that gain efficiency and accuracy over existing methods is that we directly exploit the analytic connectivity information of the mesh in combination with the available z-buffer information during rendering, and filter artifacts in connected edges during the process to improve the visual quality of strokes after stylization.

PhD Thesis Supportive Presentation for Computer Games
Nick Halper.
University of Magdeburg, 2003. [BibTeX]

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