Real-time image-space outlining for non-photorealistic rendering

Authors:
Jason L. Mitchell;Chris Brennan;Drew Card
Affiliations:
ATI Research;ATI Research;ATI Research
Venue:
ACM SIGGRAPH 2002 conference abstracts and applications
Year:
2002

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Abstract

In Non-Photorealistic Rendering (NPR), outlines at object silhouettes, shadow edges and texture boundaries are important visual cues which have previously been difficult to generate in real-time. We present an image-space technique which uses pixel shading hardware to generate these three classes of outlines in real time. In all three cases, we render alternate representations of the desired scene into texture maps which are subsequently processed by pixel shaders to find discontinuities corresponding to outlines in the scene. The outlines are then composited with the shaded scene.