Extração de atributos em imagens de sensoriamento remoto utilizando Independent Component Analysis e combinação de métodos lineares

• Ano de defesa: 2006
• Autor(a) principal: Levada, Alexandre Luís Magalhães
• Orientador(a): Mascarenhas, Nelson Delfino d'Ávila
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de São Carlos
• Programa de Pós-Graduação: Programa de Pós-Graduação em Ciência da Computação - PPGCC
• País: BR
• Palavras-chave em Português: Reconhecimento de padrões; Sensoriamento remoto; Seleção de atributos
• Área do conhecimento CNPq: CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::GEOFISICA::SENSORIAMENTO REMOTO
• Link de acesso: https://repositorio.ufscar.br/handle/ufscar/318

Methods for feature extraction represent an important stage in statistical pattern recognition applications. In this work we present how to improve classification performance creating a feature fusion framework to combine second and higher order statistical methods, avoiding existing limitations of the individual approaches and problems as ill-conditioned behavior, which may cause unstable results during the estimation of the independent components (whitening process) and eventual noise amplifications. The resulting scheme is used to combine features obtained from a variety of methods into a unique feature vector defining two approaches: Concatenated and Hierarquical Feature Fusion. The methods are tested on both multispectral and hyperspectral remote sensing images, which are classified using the maxver (maximum likelihood) approach. Results indicate that the technique outperforms the usual methods in some cases, providing a valid useful tool for multivariate data analysis and classification.