折り紙作品を作成する際，一般に利用される折り紙教本は，折り操作が十分に表現されていないため理解することが容易ではない．そのため，計算機を用いてユーザの折り紙の状態にあわせて折り方を説明する，インタラクティプな折り操作支援システムは有用である．折り紙の状態を認識するためには，ユーザの折り操作を知る必要がある．本稿では，折り紙の特徴を利用して，カメラ画像から折り操作を推定する手法を提案する．%In an origami work, generally the book called origami drill book has been often used. However, since folding operations are not fully expressed, it is not always easy for beginners to perform an origami work successfully on the way. We propose an interactive folding operation support system which explains the folding process clearly according to the procedural states of origami. In order to recognize the state of origami, it is necessary to know which folding operation was applied step-by-step. In this paper, we address an estimation method of the folding operation from a series of camera images using characteristic of origami.
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