@techreport{oai:ipsj.ixsq.nii.ac.jp:00041233,
 author = {中島雄平 and 梅田, 耕佑 and 苣木禎史 and 宇佐川毅 and Yuhei, Nakashima and Kousuke, Umeda and Yoshifumi, Chisaki and Tsuyoshi, Usagawa},
 issue = {126(2004-AVM-047)},
 month = {Dec},
 note = {顔特徴抽出は対象となる人物の認識や、口の動きの抽出などに非常に重要である。本稿では、遠隔発話訓練システムのための顔特徴抽出を目的とした、顔データベースの構築法を提案する。発話訓練のための重要な要素の一つである口唇領域の抽出は、その色情報が肌色情報と酷似しており、個人性もあるため困難である。利用者の照明環境等により、口唇を含む領域の決定は容易ではない。これらを考慮して口唇と瞳との比率の関係から口唇を含む標準的な領域を推定するため、本手法は、様々な照明環境において口唇よりもロバストに検出できる瞳を利用した。本稿では、構築したデータベースの有効性を、口唇領域の推定精度から検討した。, The extraction of the facial feature is very important for various purposes such as user`s identification,lip movement extraction,and so on.In this paper,the method of bulding the face database aiming at the extraction of the facial feature for a distance training system of Japanese utterance is introduced.Since lip color information has very close resemblance to skin-color information and differs person by person,the extraction of the lips area which is very important for a distance training system is difficult.Because the lighting condition at learner`s side of a distance learning system is very hard to control,the determination of area including lips is not easy.Based on thease considerations,the rectangular area which includes lips is estimated from the proportopnal relationship between lips and a pair of pupils.This strategy is chosen because the robustness of the detection of pupil is easy comparting with one of the lips under various lighting conditions.In this paper,in order to determine the proportional relationship between lips and a pair of pupils,the face database is constructed,and the ratio of inclusion of lips in the estimated area is evaluated on closed-set data.},
 title = {日本語発話訓練のための顔画像処理－顔データベースの構築},
 year = {2004}
}