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Modeling Surperspective Projection of Landscapes for Geographical Guide‐Map Generation
Author(s) -
Takahashi Shigeo,
Ohta Naoya,
Nakamura Hiroko,
Takeshima Yuriko,
Fujishiro Issei
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.t01-1-00585
Subject(s) - projection (relational algebra) , landmark , computer science , map projection , computer vision , perspective (graphical) , viewpoints , artificial intelligence , feature (linguistics) , computer graphics (images) , elevation (ballistics) , geometry , mathematics , algorithm , art , linguistics , philosophy , visual arts
It is still challenging to generate hand‐drawn pictures because they differ from ordinary photographs in that they are often drawn as seen from multiple viewpoints. This paper presents a new approach for modeling such surperspective projection based on shape deformation techniques. Specifically, surperspective landscape images for guide‐maps are generated from 3D geographical elevation data. Our method first partitions a target geographical surface into feature areas to provide designers with landmarks suitable for editing. The system takes as input 2D visual effects, which are converted to 3D geometric constraints for geographical surface deformation. Using ordinary perspective projection, the deformed shape is then transformed into a target guide‐map image where each landmark enjoys its own vista points. An algorithm for calculating such 2D visual effects semi‐automatically from the geographical shape features is also considered.