芸術科学会論文誌 投稿用カバーシート

■ 論文種類（以下のうちから一つ選択）
  ・原著論文 フルペーパー    

■ 論文分野（1)〜3)のうちから一つ選択）
  2) 科学系分野

■ カテゴリ（1個以上選択）
  a-1) CG技術(モデリング)

■ 該当特集（以下のうちから一つ選択）
  ・特集名「2010 NICOGRAPH International・春季大会・芸術科学会展発表論文特集」

■ 論文題名(和文、英文)
Abstract Shape Extraction For Watercolor Tree Rendering Using Anisotropic Density Functions

■ 著者名(和文、英文)
Michio Shiraishi (正会員)
Yu Kamimura (非会員)
Mikio Shinya (非会員)

■ 著者所属(和文、英文)
Toho University Graduate School of Science

■ 著者e-mail
shira@is.sci.toho-u.ac.jp

■ 連絡担当者の氏名、住所、所属、電話、Fax、e-mail
白石路雄
274-8510 千葉県船橋市三山2-2-1
東邦大学理学部情報科学科
047-472-8028
shira@is.sci.toho-u.ac.jp

■ 論文概要(和文400字程度、英文100ワード程度)
Trees are important in synthesizing outdoor scenes. One of the features of trees is their complicated shape composed of many leaves, branches and trunks. In many non-photorealistic rendering methods, abstract shapes are required to convey the information of shape to the viewer.

Luft and Deussen proposed a method that extracts abstract shapes from tree polygon models, which adopted isotropic density functions for leaves.  The leaves are generally flat, however, so that their method tends to extract the abstract shape with dilation. This paper proposes an abstract shape extraction method that utilizes anisotropic density functions to capture anisotropic structures of leaves.

The proposed method was implemented and the several types of tree models were tested. This paper also introduces metrics to evaluate dilation and erosion of extracted shapes. The result shows that the dilation and erosion can be controlled by choosing the parameters, so that users can extract abstract shapes in several styles according to their preference.

■ キーワード(和文5個程度、英文5個程度)
Non photorealistic Rendering, Abstract Shape, Tree Rendering, Metaball