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Surface Relief Analysis for Illustrative Shading
Author(s) -
Ammann Lucas,
Barla Pascal,
Guennebaud Gaël,
Granier Xavier,
Reuter Patrick
Publication year - 2012
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/j.1467-8659.2012.03144.x
Subject(s) - shading , computer science , radiance , surface (topology) , vertex (graph theory) , computer vision , point (geometry) , photometric stereo , visualization , computer graphics (images) , feature (linguistics) , polynomial , artificial intelligence , mathematics , theoretical computer science , geography , image (mathematics) , geometry , remote sensing , graph , mathematical analysis , linguistics , philosophy
In this paper, we present an analysis technique that leverages the complexity found in detailed 3D models for illustrative shading purposes. Given a smooth base surface with relief, it locates relief features (concavities, convexities and inflections) around each surface point and at multiple scales, using cubic‐polynomial fitting. This object‐space, per‐vertex information is then used to guide a variety of shading techniques including normal enhancement, feature visualization, accessibility shading and radiance scaling. Thanks to this approach, features at multiple scales are easily combined, filtered and shaded, allowing users to explore surface relief in real‐time.