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Stylizing Silhouettes at Interactive Rates:
From Silhouette Edges to Silhouette Strokes
Author(s) -
Isenberg Tobias,
Halper Nick,
Strothotte Thomas
Publication year - 2002
Publication title -
computer graphics forum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 120
eISSN - 1467-8659
pISSN - 0167-7055
DOI - 10.1111/1467-8659.00584
Subject(s) - silhouette , computer science , rendering (computer graphics) , computer vision , computer graphics (images) , artificial intelligence , stylized fact , computer graphics , polygon mesh , graphics , non photorealistic rendering , line (geometry) , computer animation , animation , mathematics , geometry , computer facial animation , economics , macroeconomics
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 availablez‐bufferinformation during rendering, and filter artifacts in connected edges during the process to improve the visual quality of strokes after stylization. Categories and Subject Descriptors (according to ACM CCS): 1.3.3 [Computer Graphics]: Picture/Image Generation—Line and curve generation 1.3.7 [Computer Graphics]: Three‐Dimensional Graphics and Realism—Hidden line/surface removal