Non-Photorealistic Computer Graphics Library

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Found 13 item(s) authored by "Lee Markosian" .
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Proceedings An Interface for Sketching 3D Curves
Jonathan M. Cohen, Lee Markosian, Robert C. Zeleznik, John F. Hughes, Ronen Barzel.
Proceedings of the 1999 ACM Symposium on Interactive 3D Graphics, pp. 17--21, 1999. [BibTeX]

PhD Thesis Art-based Modeling and Rendering for Computer Graphics

Author(s): Lee Markosian.
PhD Thesis: Department of Computer Science, Brown University, 2000.
[BibTeX] Find this paper on Google

Abstract:
Over the centuries artists and illustrators have developed techniques to effectively convey visual information. In this dissertation we develop the idea that we can apply these techniques to increase the expressive power of 3D computer graphics. This leads us to seek to build a unified free-form modeling system with which a designer can amplify her skills with pencil and paper to model both the geometry and stylized look of virtual scenes. In part I we first develop algorithms for rendering finely tessellated smooth surfaces in the style of simple line drawings, and at interactive rates. We next develop a procedural texture framework that lets us divide a model into distinct regions, with each rendered according to what it represents (bricks on the walls of a castle, say, but wood planks on the drawbridge). We then use this framework to develop two new classes of rendering algorithms { one class performs simple hatched shading, the other adopts techniques of the children's book illustrator Dr. Seuss (and others) to render fur, grass and trees in a stylized manner. In part II we focus on the problem of modeling a scene's geometry through an interface that leverages an artist's 2D drawing skills. We begin with a new technique for constructing 3D curves from 2D input: The user draws a curve and its shadow as both would appear from a given viewpoint, and the system computes the corresponding 3D curve. We next describe a new algorithm for computing a free-form surface that smoothly fits over a collection of \primitives" such as generalized cylinders or other \swept" objects. Our intention is to integrate the two techniques so that an artist can quickly sketch such primitives with the help of the first technique, then oversketch them with the second technique to produce the desired free-form surface. The natural next step is to integrate the various parts into a single system for sketching both 3D shapes and the stylized rendering algorithms used to depict them.

Proceedings Art-Based Rendering of Fur, Grass, and Trees
Michael A. Kowalski, Lee Markosian, J.D. Northrup, Lubomir D. Bourdev, Ronen Barzel, Loring S. Holden, John F. Hughes.
Proceedings of Siggraph 99, 1999. [BibTeX]

Proceedings Art-based Rendering with Continuous Levels of Detail
Lee Markosian, Barbara J. Meier, Michael A. Kowalski, Loring S. Holden, J.D. Northrup, John F. Hughes.
1st International Symposium on Non-Photorealistic Animation and Rendering (NPAR'00), pp. 59--66, Annecy, France, June 05 - 07, 2000. [BibTeX]

Proceedings Artistic Silhouettes: A Hybrid Approach
J.D. Northrup, Lee Markosian.
1st International Symposium on Non-Photorealistic Animation and Rendering (NPAR'00), pp. 31--37, Annecy, France, June 05 - 07, 2000. [BibTeX]

Article Coherent stylized silhouettes
Robert D. Kalnins, Philip L. Davidson, Lee Markosian, Adam Finkelstein.
ACM Transactions on Graphics, Vol. 22, No. 3, pp. 856--861, July, 2003. [BibTeX]

Article Detail Control in Line Drawings of 3D Meshes
Kyuman Jeong, Alex Ni, Seungyong Lee, Lee Markosian.
The Visual Computer (Pacific Graphics 2005), Vol. 21, No. 8, pp. 698--706, 2005. [BibTeX]

Technical Report Multi-scale Line Drawings from 3D Meshes
Alex Ni, Kyuman Jeong, Seungyong Lee, Lee Markosian.
Department of Electrical Engineering and Computer Science, University of Michigan, No. CSE-TR-510-05, July, 2005. [BibTeX]

Proceedings Multi-scale line drawings from 3D meshes
Alex Ni, Kyuman Jeong, Seungyong Lee, Lee Markosian.
SI3D '06: Proceedings of the 2006 symposium on Interactive 3D graphics and games, pp. 133--137, New York, NY, USA, ACM Press, 2006. [BibTeX]

Proceedings Real-Time Nonphotorealistic Rendering
Lee Markosian, Michael A. Kowalski, Samuel J. Trychin, Lubomir D. Bourdev, Daniel Goldstein, John F. Hughes.
ACM Siggraph 97, Annual Conference Series 1997, pp. 415--420, August, 1997. [BibTeX]

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