Non-Photorealistic Computer Graphics Library

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Found 3 item(s) authored by "Maike Walther" Find Author on Google.

In Book Hatching, Stroke Styles & Pointillism

Author(s): Kevin Buchin, Maike Walther.
In Book: Wolfgang Engel, Rendering Techniques, pp. 340--347, Wordware Publishing, Vol. ShaderX2 - Shader Tips and Tricks, September, 2003.
[BibTeX] Find this paper on Google

Abstract:
Hatching is a common technique used in Non-Photorealistic Rendering (NPR). For hatching, series of strokes are combined into textures. These compositions of strokes can convey the surface form through stroke orientation, the surface material through stroke arrangement and style, and the effect of light on the surface through stroke density. Up until now an important issue of real-time hatching techniques has been how to employ the limited programmability of the graphics hardware currently available. Pixel programmability has now reached a state where we can shift the focus to adding more flexibility to the hatching scheme and combining hatching with other techniques. We present a hatching scheme and some extensions to it, namely interactively changing the stroke style, and hatching with specular highlights. As an application, we show how we integrate hand drawings into a scene taking into account the effect of lighting. Finally, we show how to choose a color for each stroke depending on the background color, which can be used for a pointllistic style.


Proceedings Illustrating Terrains using Direction of Slope and Lighting
Kevin Buchin, Mario Costa Sousa, Jürgen Döllner, Faramarz Samavati, Maike Walther.
4th ICA Mountain Cartography Workshop, Vall de Núria, Catalunya, Spain, 30th September - 2nd. October 2004, 2004. [BibTeX]

Proceedings Real-Time Per-Pixel Rendering With Stroke Textures
Kevin Buchin, Maike Walther.
19th Spring Conference on Computer Graphics, ACM Press, 2003. [BibTeX]

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