Non-Photorealistic Computer Graphics Library

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Found 6 item(s) authored by "Lisa M. Streit" Find Author on Google.

Proceedings Edge enhancement issues in halftoning

Author(s): John W. Buchanan, Lisa M. Streit, Oleg Veryovka.
Proceedings: Graphics Interface (GI'98), pp. 209--216, 1998.
[BibTeX] Find this paper on Google

The correct display of edges in half-toned images is necessary for accurate image reproduction. This problem has been addressed by pre-processing the image to enhance the edges or by altering the half-toning algorithm to account for edges. In this paper we present a post-processing edge enhancement technique that is applicable to all half-toning algorithms. We identify two types of edge pixels in the image; dark and light edge pixels. Edges in an image are highlighted by setting the dark/light edge pixels to black/white. We tested our method on a modern laser printer. Because of this our evaluation of the technique is restricted to clustered half-toning methods. We evaluated the effect of enhancing edges by conducting a user survey to determine the perceived value of the different edge enhancement methods. The results of the user survey, while not statistically significant, indicate that our post-processing technique achieves comparable results to previous edge enhancement methods. Our technique is simple to implement and can be applied to any half-toning technique and thus is a good default edge-enhancing approach.

Proceedings Fast Primitive Distribution for Illustration
Andrian Secord, Wolfgang Heidrich, Lisa M. Streit.
Thirteenth Eurographics Workshop on Rendering (2002), 2002. [BibTeX]

Article Importance Driven Halftoning
Lisa M. Streit, John W. Buchanan.
Computer Graphics Forum (EG'98), Vol. 17, No. 3, 1998. [BibTeX]

Master Thesis Importance Driven Halftoning
Lisa M. Streit.
University of Alberta, 1998. [BibTeX]

Proceedings Non-photorealistic Rendering Using an Adaptive Halftoning Technique
Lisa M. Streit, Oleg Veryovka, John W. Buchanan.
Skiggraph '99, 1999. [BibTeX]

In Collection Theory and Practice of Non-Photorealistic Graphics: Algorithms, Methods, and Production Systems
Brett Achorn, Daniel Teece, M. Sheelagh T. Carpendale, Mario Costa Sousa, David Ebert, Bruce Gooch, Victoria Interrante, Lisa M. Streit, Oleg Veryovka.
Siggraph 2003, ACM Press, 2003. [BibTeX]

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