Non-Photorealistic Computer Graphics Library

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Found 24 item(s) authored in "1998".
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Master Thesis A Framework for Non-Realistic Projections
Jonathan Levene.
Massachusetts Institute of Technology, May, 1998. [BibTeX]

Proceedings A Non-Photorealistic Lighting Model For Automatic Technical Illustration
Amy A. Gooch, Bruce Gooch, Peter Shirley, Elaine Cohen.
SIGGRAPH 98, pp. 447--452, July, 1998. [BibTeX]

Proceedings A Resolution Independent Nonrealistic Imaging System for Artistic Use
Atsushi Kasao, Masayuki Nakajima.
IEEE International Conference on Multimedia Computing and Systems, pp. 358--367, 1998. [BibTeX]

Proceedings An Approach to Visualizing Transparency in Computer-Generated Line Drawings
Jörg Hamel, Stefan Schlechtweg, Thomas Strothotte.
IV'98, 1998. [BibTeX]

In Collection An interface for the interactive design of artistic screens
N. Rudaz, Roger D. Hersch, Victor Ostromoukhov.
Electronic Publishing, Artistic Imaging and Digital Typography, Springer Verlag, Lecture Notes in Computer Science 1375, pp. 1--10, 1998. [BibTeX]

Proceedings Animating Frame-To-Frame-Coherent Line Drawings for Illustrated Purposes
Maic Masuch, Lars Schumann, Stefan Schlechtweg.
Proceedings of Simulation und Visualisierung '98, SCS Europe, Peter Lorenz, Bernhard Preim, pp. 101-112, 1998. [BibTeX]

Proceedings Art in the Pipeline
S. M. F. Treavett.
Proc. 16th Eurographics UK Conference, March, 1998. [BibTeX]

Proceedings Computer-Generated Floral Ornament
Douglas E. Zongker, Michael Wong, David H. Salesin.
SIGGRAPH 98, 1998. [BibTeX]

Proceedings Edge enhancement issues in halftoning
John W. Buchanan, Lisa M. Streit, Oleg Veryovka.
Graphics Interface (GI'98), pp. 209--216, 1998. [BibTeX]

Article Importance Driven Halftoning

Author(s): Lisa M. Streit, John W. Buchanan.
Article: Computer Graphics Forum (EG'98), Vol. 17, No. 3, 1998.
[BibTeX] Find this paper on Google

Abstract:
Most halftoning techniques have been primarily concerned with achieving an accurate reproduction of local grayscale intensities while avoiding the introduction of artifacts. A secondary concern in halftoning has been the preservation of edges in the halftoned image. In this paper, we will introduce a new halftoning technique that utilizes a bandpass pyramid to achieve an accurate reproduction of important attributes in the image. Ink is distributed through the bandpass pyramid primarily according to a user defined importance function. This technique has three main characteristics. First, our technique can produce results similar to many other halftoning techniques by allowing a generic importance function to be specified. If the chosen importance function is average intensity we obtain results similar to traditional halftoning. We also show how the importance function can be changed to highlight areas with high variance. Second, in addition to changing the importance function, the drawing primitives can also be changed. By using line segments instead of single pixels as drawing primitives we illustrate how edge enhancement can be achieved. Third, this technique allows the user to easily limit the number drawing primitives used. This is useful in limited resource rendering. In addition to providing a tailorable halftoning technique our method can easily be adapted to produce two tone non-photorealistic (NPR) images. We illustrate this by showing how sketched effects can be achieved by aligning the drawing primitives according to different image attributes.

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