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Three-dimensional shape variation and sexual dimorphism of the face, nose, and mouth of Japanese individuals.
Imaizumi, Kazuhiko; Taniguchi, Kei; Ogawa, Yoshinori; Matsuzaki, Kazutoshi; Maekawa, Hidemasa; Nagata, Takeshi; Mochimaru, Masaaki; Kouchi, Makiko.
Afiliación
  • Imaizumi K; Second Forensic Biology Section, National Research Institute of Police Science, 6-3-1, Kashiwanoha, Kashiwa-shi, Chiba 277-0882, Japan. Electronic address: imaizumi@nrips.go.jp.
  • Taniguchi K; Second Forensic Biology Section, National Research Institute of Police Science, 6-3-1, Kashiwanoha, Kashiwa-shi, Chiba 277-0882, Japan.
  • Ogawa Y; Second Forensic Biology Section, National Research Institute of Police Science, 6-3-1, Kashiwanoha, Kashiwa-shi, Chiba 277-0882, Japan.
  • Matsuzaki K; Mizuho Information & Research Institute, Inc., 2-3, Kanda-Nishiki-cho, Chiyodak-ku, Tokyo 101-8443, Japan.
  • Maekawa H; Mizuho Information & Research Institute, Inc., 2-3, Kanda-Nishiki-cho, Chiyodak-ku, Tokyo 101-8443, Japan.
  • Nagata T; Mizuho Information & Research Institute, Inc., 2-3, Kanda-Nishiki-cho, Chiyodak-ku, Tokyo 101-8443, Japan; School of Integrative and Global Majors, Program in Human Biology, University of Tsukuba, 1-1-1, Tennodai, Tsukuba-shi, Ibaraki 305-8577, Japan.
  • Mochimaru M; Human Informatics Research Institute, National Institute of Advanced Industrial Science and Technology, 2-3-26, Aomi, Koto-ku, Tokyo 135-0064, Japan.
  • Kouchi M; Human Informatics Research Institute, National Institute of Advanced Industrial Science and Technology, 2-3-26, Aomi, Koto-ku, Tokyo 135-0064, Japan.
Forensic Sci Int ; 302: 109878, 2019 Sep.
Article en En | MEDLINE | ID: mdl-31377687
Three-dimensional (3D) shape variations of the face and facial parts in Japanese adults were examined to collect basic data to be used for facial comparison in forensics. In total, 1000 3D facial scans (500 males, 500 females) of Japanese individuals were re-meshed into anatomically homologous shape models and analyzed by principal component analysis (PCA) after Procrustes superimposition. Facial parts (the nose and the mouth) were segmented from homologous face models and analyzed by PCA, too. Among all kinds of objects (the face, the nose, and the mouth), the most predominant shape variation represented by the first principal component (PC1) was the height-width proportion. The second largest variation (PC2) in the face and the nose was depth; for the mouth, it was the relative protrusion of the upper and lower lips. We interpreted predominant shape variations represented by the first five principal components (PCs) in each object. Asymmetric shape variations were observed within these PCs for the nose and the mouth. Sexual dimorphism of the face and the facial parts was also examined by testing the significance of sex-linked differences in PC scores. A significant difference was found between males and females for many PCs. Sexual dimorphism was examined also by emphasizing the shape difference between average male and female faces. Our results revealed predominant 3D shape variations and sexual dimorphism of the face and facial parts. The results may be informative for performing facial comparison in police investigations, an increasingly used technique.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Caracteres Sexuales / Imagenología Tridimensional / Cara Tipo de estudio: Prognostic_studies Límite: Adult / Female / Humans / Male / Middle aged País/Región como asunto: Asia Idioma: En Revista: Forensic Sci Int Año: 2019 Tipo del documento: Article Pais de publicación: Irlanda
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Caracteres Sexuales / Imagenología Tridimensional / Cara Tipo de estudio: Prognostic_studies Límite: Adult / Female / Humans / Male / Middle aged País/Región como asunto: Asia Idioma: En Revista: Forensic Sci Int Año: 2019 Tipo del documento: Article Pais de publicación: Irlanda