6 research outputs found

    Attributed Grammar-A Tool For Combining Syntactic and Statistical Approaches to Pattern Recognition

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    [[abstract]]Attributed grammars are defined from the pattern recognition point of view and shown to be useful for descriptions of syntactic structures as well as semantic attributes in primitives, subpatterns, and patterns. A pattern analysis using attributed grammars is proposed for pattern classification and description. This system extracts primitives and their attributes after preprocessing, performs syntax analysis of the resulting pattern representations, computes and extracts subpattern attributes for syntactically accepted patterns, and finally makes decisions according to the Bayes decision rule

    Two-dimensional object recognition through two-stage string matching

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    [[abstract]]A two-stage string matching method for the recognition of two-dimensional (2-D) objects is proposed in this work. The first stage is a global cyclic string matching. The second stage is a local matching with local dissimilarity measure computing. The dissimilarity measure function of the input shape and the reference shape is obtained by combining the global matching cost and the local dissimilarity measure. The proposed method has the advantage that there is no need to set any parameter in the recognition process. Experimental results indicate that the two-stage string matching approach significantly improves the recognition rates while comparing to the one-stage string matching method.[[fileno]]2020405010059[[department]]工工

    The current approaches in pattern recognition

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    Investigações sobre redes neurais artificiais para o reconhecimento de faces humanas na forma 3D

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    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Ciência da ComputaçãoReconhecimento de faces humanas é uma área de grande interesse no mundo científico. A maioria das tecnologias desenvolvidas utiliza imagens com informação 2D. Este trabalho contou com um método inédito de processamento para a obtenção da forma 3D de uma face. Por meio dele se produziu várias bases de dados, com diferentes resoluções e níveis de ruído aceitáveis. Elas foram utilizadas na construção de um sistema de reconhecimento de face baseado em redes neurais artificiais. A vantagem de se utilizar a forma 3D da face está na exclusão de problemas ocasionados pela iluminação e desalinhamento
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