• JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
 
  Bookmark and Share
 
 
Master's Dissertation
DOI
10.11606/D.3.2012.tde-19072013-171405
Document
Author
Full name
Tupã Negreiros
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2012
Supervisor
Committee
Okamoto Junior, Jun (President)
Barretto, Marcos Ribeiro Pereira
Morimoto, Carlos Hitoshi
Title in Portuguese
Rastreamento labial: aplicação em leitura labial.
Keywords in Portuguese
Interface homem-computador
Leitura labial
Rastreamento labial
Abstract in Portuguese
Novas interfaces homem-computador têm sido pesquisadas a fim de se tornarem mais naturais e flexíveis. O rastreamento labial, foco deste trabalho, é parte deste contexto, podendo ser utilizado na detecção de emoções, bem como no auxílio ao reconhecimento de voz. Pode assim tornar-se um módulo inicial para a leitura labial, na criação de interfaces voltadas a deficientes auditivos. Os algoritmos disponíveis na literatura foram analisados e comparados, mostrando os prós e contras de cada método. Finalmente foi escolhido desenvolver uma técnica baseada em Active Appearance Model (AAM). O AAM gera um modelo a partir de um conjunto de imagens de treinamento, que pode ser utilizado no rastreamento labial de novas imagens. A técnica proposta baseia-se no uso de algoritmos genéticos para o ajuste do modelo, diferente, portanto, da técnica proposta originalmente pelo AAM. A convergência da técnica proposta foi extensivamente analisada, com a variação de parâmetros, buscando a análise de erro residual da função custo e sua relação com o tempo de convergência e erro de posição.
Title in English
Lip tracking: an application in lip reading.
Keywords in English
Lip reading
Lip tracking
Man machine interface
Abstract in English
New human-computer interfaces have been researched to make them more natural and flexible. The lip tracking, emphasis of this work, is part of this setting it can be used for detecting emotions and to aid the speech recognition. It may well become an initial module for lip-reading, in the creation of interfaces directed to hearing impaired people. Algorithms available on literature are analyzed and compared, explaining the upsides and downsides of each method. Finally was chose to develop a technique based on Active Appearance Model (AAM). The AAM generates a model from a set of training images, which can be used in tracking of new lip images. The proposed technique is based on the use of genetic algorithms for fitting the model, different therefore of the technique originally proposed by AAM. The convergence of the proposed technique has been extensively analyzed with the variation of parameters, searching the error analysis of the cost function residual error and its relation to the execution time and position error.
 
WARNING - Viewing this document is conditioned on your acceptance of the following terms of use:
This document is only for private use for research and teaching activities. Reproduction for commercial use is forbidden. This rights cover the whole data about this document as well as its contents. Any uses or copies of this document in whole or in part must include the author's name.
Publishing Date
2013-07-29
 
WARNING: Learn what derived works are clicking here.
All rights of the thesis/dissertation are from the authors
Centro de Informática de São Carlos
Digital Library of Theses and Dissertations of USP. Copyright © 2001-2020. All rights reserved.