Non-Photorealistic Computer Graphics Library

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Found 7 item(s) authored by "Michael F. Cohen" .

Misc Free-form Video Tooning Deformation
Jue Wang, Ying-Qing Xu, Michael F. Cohen.
Poster on SCA2004, 2004. [BibTeX]

Proceedings Image Precision Silhouette Edges

Author(s): Ramesh Raskar, Michael F. Cohen.
Proceedings: Symposium on Interactive 3D Graphics (I3D'99), pp. 135--140, Atlanta, Georgia, United States, 1999.
[BibTeX] [DOI] Find this paper on Google

Finding and displaying silhouette edges is important in applications ranging from computer vision to nonphotorealistic rendering. To render visible silhouette edges of a polygonal object in a scene from a given viewpoint, we must first find all silhouette edges, i.e. boundaries between adjacent front facing and back-facing surfaces. This is followed by solving the partial visibility problem so that only those parts of silhouette edges, which are not occluded by interior of any front facing surface, are rendered. The scene may optionally be rendered with a lighting model. This paper describes a simple general-purpose method to combine all three operations for any scene composed of objects that can be scan-converted. Using a depth buffer, the rendering process computes the intersection of adjacent front facing and back-facing surfaces in image space at interactive rates. All operations are performed in image-precision and hence special care is taken for the limited numerical precision of the depth buffer. A solution is suggested using viewdependent modification of polygonal objects. The method does not require any preprocessing or adjacency information and hence is applicable for dynamic scenes.

Proceedings Stylized Video Cubes
Allison W. Klein, Peter-Pike J. Sloan, Adam Finkelstein, Michael F. Cohen.
ACM SIGGRAPH Symposium on Computer Animation, pp. 15--22, July, 2002. [BibTeX]

Proceedings Stylizing 2.5-D Video
Noah Snavely, C. Lawrence Zitnick, Sing Bing Kang, Michael F. Cohen.
NPAR '06: Proceedings of the 4th international symposium on Non-photorealistic animation and rendering, pp. 63--69, New York, NY, USA, June, ACM Press, 2006. [BibTeX]

Article The Cartoon Animation Filter
Jue Wang, Steven Drucker, Maneesh Agrawala, Michael F. Cohen.
ACM Transactions on Graphics (Proceedings of SIGGRAPH 2006), Vol. 23, No. 3, pp. 1169--1173, July, 2006. [BibTeX]

Proceedings Video Mosaics
Allison W. Klein, Tyler Grant, Adam Finkelstein, Michael F. Cohen.
NPAR 2002: Second International Symposium on Non Photorealistic Rendering, pp. 21--28, June, 2002. [BibTeX]

Proceedings Video Tooning
Jue Wang, Ying-Qing Xu, Heung-Yeung Shum, Michael F. Cohen.
SIGGAPH2004, 2004. [BibTeX]

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