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Article Fluid-based hatching for tone mapping in line illustrations

Author(s): Afonso Paiva, Emilio Vital Brazil, Fabiano Petronetto, Mario Costa Sousa.
Article: The Visual Computer, Vol. 25, No. 5-7, pp. 519--527, May, 2009.
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Abstract:
This paper presents a novel meshless, physically-based framework for line art rendering of surfaces with complex geometry and arbitrary topology. We apply an inviscid ?uid ?ow simulation using Smoothed Particles Hydrodynamics to compute the global velocity and cross ?elds over the surface model. These ?elds guide the automatic placement of strokes while extracting the geometric and topological coherence of the model. Target tones are matched by tonal value maps allowing different hatching and crosshatching effects. We demonstrate the simplicity and effectiveness of our method with sample renderings obtained for a variety of models.

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