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	2011/10
形態種別	学術論文
査読	査読あり
標題	Previewing Volume Decomposition Through Optimal Viewpoints
執筆形態	共著
掲載誌名	Scientific Visualization: Interactions, Features, Metaphors, Schloss
掲載区分	国外
出版社・発行元	Dagstuhl-Leibniz-Zentrum fuer Informatik
巻・号・頁	pp.356-359
著者・共著者	Shigeo Takahashi, Issei Fujishiro, Yuriko Takeshima, Chongke Bi
概要	Understanding a volume dataset through a 2D display is a complex task because it usually contains multi-layered inner structures that inevitably cause undesirable overlaps when projected onto the display. This requires us to identify feature subvolumes embedded in the given volume and then visualize them on the display so that we can clarify their relative positions. This article therefore introduces a new feature-driven approach to previewing volumes that respects both the 3D nested structures of the feature subvolumes and their 2D arrangement in the projection by minimizing their occlusions. The associated process begins with tracking the topological transitions of isosurfaces with respect to the scalar field, in order to decompose the given volume dataset into feature components called interval volumes while extracting their nested structures. The volume dataset is then projected from the optimal viewpoint that archives the best balanced visibility of the decomposed components. The position of the optimal viewpoint is updated each time when we peel off an outer component with our interface by calculating the sum of the viewpoint optimality values for the remaining components. Several previewing examples are demonstrated to illustrate that the present approach can offer an effective means of traversing volumetric inner structures both in an interactive and automatic fashion with the interface.