An application of mathematical morphology to filtering and feature extraction for pattern recognition

نویسنده

  • Marcin IWANOWSKI
چکیده

Mathematical Morphology is a very efficient tool for image processing and analysis, based on non-linear local operators. In this paper mathematical morphology is applied to pattern recognition. The appropriate practical methods of morphological image processing are described, as well as its theoretical background. An example of an application of described methods to recognition of car number plates is also presented. Mathematical morphology is applied to filter the image and to extract some topological features from each character. These features are later included in a feature vector, which is recognized by using the decision tree. The aim of the paper is to proof that mathematical morphology is a powerful technique which could be efficiently applied in the engineering practice to pattern recognition. Streszczenie. Morfologia matematyczna jest bardzo efektywnym narzędziem komputerowego przetwarzania i analizy obrazów opartym na nieliniowych operatorach lokalnych. W artykule morfologia matematyczna została stosowana do rozpoznawania wzorców. Opisane zostały odpowiednie praktyczne metody morfologicznego przetwarzania obrazów, jak również ich teoretyczne podstawy. Pokazany jest także przykład zastosowania opisanych metod do rozpoznawania tablic rejestracyjnych samochodów. Morfologia matematyczna jest stosowana do filtracji obrazu oraz do ekstrakcji z każdego znaku pewnych jego cech topologicznych. Cechy te zostają następnie umieszczone w wektorze cech, który jest następnie rozpoznawany z wykorzystaniem drzewa decyzyjnego. Celem artykułu jest wykazanie, że morfologia matematyczna jest wydajna techniką znajdującą swoje zastosowanie w praktyce inżynierskiej do rozpoznawania wzorców

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تاریخ انتشار 2003