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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Detecção de faces e rastreamento da pose da cabeça

Schramm, Rodrigo 20 March 2009 (has links)
Submitted by Mariana Dornelles Vargas (marianadv) on 2015-04-27T19:08:59Z No. of bitstreams: 1 deteccao_faces.pdf: 3878917 bytes, checksum: 2fbf8222ef54d5fc0b1df0bf3b3a5292 (MD5) / Made available in DSpace on 2015-04-27T19:08:59Z (GMT). No. of bitstreams: 1 deteccao_faces.pdf: 3878917 bytes, checksum: 2fbf8222ef54d5fc0b1df0bf3b3a5292 (MD5) Previous issue date: 2009-03-20 / HP - Hewlett-Packard Brasil Ltda / As câmeras de vídeo já fazem parte dos novos modelos de interação entre o homem e a máquina. Através destas, a face e a pose da cabeça podem ser detectadas promovendo novos recursos para o usuário. Entre o conjunto de aplicações que têm se beneficiado deste tipo de recurso estão a vídeo-conferência, os jogos educacionais e de entretenimento, o controle de atenção de motoristas e a medida de foco de atenção. Nesse contexto insere-se essa proposta de mestrado, a qual propõe um novo modelo para detectar e rastrear a pose da cabeça a partir de uma seqüência de vídeo obtida com uma câmera monocular. Para alcançar esse objetivo, duas etapas principais foram desenvolvidas: a detecção da face e o rastreamento da pose. Nessa etapa, a face é detectada em pose frontal utilizando-se um detector com haar-like features. Na segunda etapa do algoritmo, após a detecção da face em pose frontal, atributos específicos da mesma são rastreados para estimar a variação da pose de cabeça. / Video cameras are already part of the new man-machine interaction models. Through these, the face and pose of the head can be found, providing new resources for users. Among the applications that have benefited from this type of resource are video conference, educational and entertainment games, and measurement of attention focus. In this context, this Master's thesis proposes a new model to detect and track the pose of the head in a video sequence captured by a monocular camera. To achieve this goal, two main stages were developed: face detection and head pose tracking. The first stage is the starting point for tracking the pose. In this stage, the face is detected in frontal pose using a detector with Haar-like features. In the second step of the algorithm, after detecting the face in frontal pose, specific attributes of the read are tracked to estimate the change in the pose of the head.

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