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Título: KERNEL METHODS IN AGE ESTIMATION
Autor(es): DANIEL COELHO DE CASTRO
Colaborador(es): MARLEY MARIA BERNARDES REBUZZI VELLASCO - Orientador
RAUL QUEIROZ FEITOSA - Orientador
Catalogação: 06/JUL/2015 Língua(s): PORTUGUESE - BRAZIL
Tipo: TEXT Subtipo: SENIOR PROJECT
Notas: [pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio.
[en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio.
Referência(s): [pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/TFCs/consultas/conteudo.php?strSecao=resultado&nrSeq=24866@1
[en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/TFCs/consultas/conteudo.php?strSecao=resultado&nrSeq=24866@2
DOI: https://doi.org/10.17771/PUCRio.acad.24866
Resumo:
As many computer vision problems, age estimation from facial images involves a large number of features. In order to allow the successful application of a regression model and to mitigate the influence of irrelevant or redundant features, it is often beneficial to execute an intermediate dimensionality reduction step. It should be able to exploit the structure of the data so as to simplify the regression task. We have studied principal component analysis (PCA), linear discriminant analysis (LDA) and subspace learning via pairwise age ranking (PAR) for dimensionality reduction, applied to the age estimation problem. We have comparatively analysed PCA s and LDA s kernel-based nonlinear variants, KPCA and KDA, as well as one for PAR, KPAR, which was developed in this work. Results suggest significant improvements on age estimation accuracy when the nonlinear methods are used, in comparison with the corresponding linear methods.
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