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Projeto de bancos de filtros wavelet quase-ortogonais simétricos e de suporte compacto baseado no processo de ortogonalização wavelet
(Universidade Estadual Paulista (Unesp), 2021-02-09)
A análise wavelet baseada em um banco de filtros de dois canais tem sido usada com frequência em várias aplicações. O algoritmo utilizado para tal propósito é a transformada wavelet rápida, que permite obter os coeficientes ...
Wavelet-based fingerprint image retrieval
(Scopus, 2009)
This paper presents a novel approach for personal identification based on a wavelet-based fingerprint retrieval system which encompasses three image retrieval tasks, namely, feature extraction, similarity measurement, and ...
Classification of masses in mammographic image using wavelet domain features and polynomial classifier
(2013-06-21)
Breast cancer is the most common cancer among women. In CAD systems, several studies have investigated the use of wavelet transform as a multiresolution analysis tool for texture analysis and could be interpreted as inputs ...
Classification of masses in mammographic image using wavelet domain features and polynomial classifier
(2013-06-21)
Breast cancer is the most common cancer among women. In CAD systems, several studies have investigated the use of wavelet transform as a multiresolution analysis tool for texture analysis and could be interpreted as inputs ...
Identificação de estertores em sons respiratórios utilizando transformada wavelet e análise de discriminante linear
(Universidade Tecnológica Federal do ParanáCuritibaPrograma de Pós-Graduação em Engenharia Elétrica e Informática Industrial, 2015-07-23)
Crackles are adventitious and discontinuous breath sounds that occur in lung diseases. Time domain parameters classify the crackles as fine, medium, and coarse, and may have positive or negative polarity. This work ...
Combining pixel domain and compressed domain index for sketch based image retrieval
(Springer, 2017)
Sketch-based image retrieval (SBIR) lets one express a precise visual query with simple and widespread means. In the SBIR approaches, the challenge consists in representing the image dataset features in a structure that ...
Classification of events in distribution networks using autonomous neural models
(Curitiba, 2009-11)
This paper presents a method for automatic classification of faults and events related to quality of service in electricity distribution networks. The method consists in preprocessing event oscillographies using the wavelet ...
New signal processing approach for structural health monitoring in noisy environments based on impedance measurements
(2019-04-01)
The electro-mechanical impedance (EMI) technique is one of the most promising structural health monitoring (SHM) approaches for material damage detection, which is based on impedance measurements of low-cost piezoelectric ...