Resumo

CEBALLOS, Alexánder; GOMEZ, Juan Bernardo  e  PRIETO, Flavio. Outer Lip contour tracking in video images. Rev. ing. univ. Medellin [online]. 2009, vol.8, n.14, pp.129-144. ISSN 1692-3324.

An accurate tracking of a person's mouth when he/she is speaking is an important challenge in several applications such as face identification or interaction with computer. Complexity of shape, texture, and color of the mouth, as well as changes in lighting and backgrounds of possible scenarios makes of it an open problem yet. This article proposed an algorithm for a tracking of the mouth external contour without using markers or any kind of make-up for highlighting lips, based on appearance and morphological restrictions defined by the MPEG-4 Standard. Algorithm is robust before the presence of beard, skin tone, and image quality.

Palavras-chave : Computer-assisted view; MPEG-4; special points of the mouth external contour; mouth tracking.

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