タケシマ　ユリコ   竹島　由里子    所属   メディア学部 メディア学科    職種   教授
言語種別	英語
発行・発表の年月	2002/09
形態種別	学術論文
査読	査読あり
標題	Modeling Surperspective Projection for Geographical Guide-Map Generation
執筆形態	共著
掲載誌名	Computer Graphics Forum
掲載区分	国外
出版社・発行元	Wiley
巻・号・頁	21(3),pp.259-268
著者・共著者	Shigeo Takahashi, Naoya Ohta, Hiroko Nakamura, Yuriko Takeshima, Issei Fujishiro
概要	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.