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矩形領域に基づく定性空間推論の提案と実装

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(1)情報処理学会論文誌. プログラミング. Vol. 2. No. 3. 58 (July 2009). 発表概要. 矩形領域に基づく定性空間推論の提案と実装 雲. 川. 翔†1. 高. 橋. 和. 子†1. 本発表では,矩形を対象とした定性空間推論について述べ,その応用システムを示 す.定性空間推論は,オブジェクトの持つ特徴を抽出して記号で表現し,それをもとに 推論を行うものである.従来の定性空間推論では対象とする図は特に限定せず,抽出 する情報を限定することで,単純な表現を提供し計算量の抑制を行っているものが多 い.しかし,実際には扱うことのできる情報量が少ないため高度な推論は困難であり, 応用システムはほとんど示されていない.我々は,対象とする図を二次元平面上の図 に前面,背面を加えた準三次元空間の矩形に制限することによって逆に扱える情報量 を増やし,実世界において応用可能な定性空間推論の枠組みを提案する.この枠組み では,対象となる図を「領域」と「線」という単純な 2 つの基本要素と,それらの関 係によって記号表現する.本発表では,対象となる図の記号表現と各領域の表示に関 する制約条件が与えられたとき,領域の可視,不可視や領域間の重なりを導く推論機 構について述べる.また,我々は,この枠組みをマルチウィンドウ環境におけるウィ ンドウの表示へ応用したシステムを作成した.これはユーザにとって必要な部分を見 せ,不必要な部分をできるだけ隠すようなウィンドウの配置を定性空間推論によって 導き,自動でウィンドウ操作を行うものである.本システムでは,定性空間推論によ る推論機構は Prolog 言語で,ウィンドウの情報から記号表現への変換および推論結 果からウィンドウの配置を表示する部分を Java 言語で実装している.. high-level reasoning since the information that can be treated is little and few application systems have been provided. We propose a new framework for QSR that can treat much information and provide a practical application. In our framework, the target figure is restricted to the rectangles in the quasi-threedimensional space, that is, two-dimensional plane with foreground/background. In our framework, a target figure is represented symbolically using two simple objects of regions and lines and their relationships. We describe the transformation from a figure to the symbolic representation and reasoning mechanism which derives the visibility of a region or overlapping of regions from the symbolic representation with the constraint on display. We apply this framework to the system that automatic placement of windows in multi-window systems. It derives the placement in which some parts of regions that should be shown to users are visible and others that should be hidden are invisible. Reasoning in QSR is implemented in Prolog, and generation of QSR expression from the information of windows and displaying the windows according to the result of reasoning are implemented in Java.. (平成 21 年 1 月 26 日発表). Qualitative Spatial Reasoning System Based on Rectangles and Its Implementation Shou Kumokawa†1 and Kazuko Takahashi†1 We describe a Qualitative Spatial Reasoning based on rectangles and show its application system. Qualitative Spatial Reasoning (QSR) is a method that treats images or figures qualitatively, by extracting the information necessary for a user’s purpose. There is no restriction of target figures in most QSR systems, while the restricted information is extracted to realize simple expression and reduce computational complexity. However, in fact, it is hard to perform. 58. †1 関西学院大学 Kwansei Gakuin University. c 2009 Information Processing Society of Japan .

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