Morphological Segmentation
Mostrando 1-12 de 22 artigos, teses e dissertações.
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1. A NOVEL RAISIN SEGMENTATION ALGORITHM BASED ON DEEP LEARNING AND MORPHOLOGICAL ANALYSIS
ABSTRACT We propose a segmentation algorithm for raisin extraction. The proposed approach consists of the following aspects. Deep learning is used to predict the number of raisins in each connected region, and the shape features such as the roundness, area, X-axis value for the centroid, Y-axis value for the centroid, axis length and perimeter of each region
Eng. Agríc.. Publicado em: 04/11/2019
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2. MORPHOLOGICAL CHARACTERIZATION OF COLORECTAL PITS USING AUTOFLUORESCENCE MICROSCOPY IMAGES
RESUMO CONTEXTO: O câncer colorretal é uma das patologias mais prevalentes. Seu prognóstico é ligado à detenção e ao tratamento precoces. Atualmente o diagnóstico é realizado por análise histológica de biópsias de pólipo, seguida de classificação morfológica. A classificação de padrões de Kudo é frequentemente utilizada para a diferenci
Arq. Gastroenterol.. Publicado em: 26/08/2019
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3. Robust pulmonary segmentation for chest radiography, combining enhancement, adaptive morphology and innovative active contours
Abstract Introduction Statistical data reveal that approximately 140 million radiological exams are performed annually in Brazil. These exams are designed to detect and to analyze fractures, caused by different types of trauma; as well as, to diagnose pathologies such as pulmonary diseases. For better visualization of those lesions or abnormalities, method
Res. Biomed. Eng.. Publicado em: 13/09/2018
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4. Algorithm for predicting macular dysfunction based on moment invariants classification of the foveal avascular zone in functional retinal images
Abstract Introduction A new method for segmenting and quantifying the macular area based on morphological alternating sequential filtering (ASF) is proposed. Previous studies show that persons with diabetes present alterations in the foveal avascular zone (FAZ) prior to the appearance of retinopathy. Thus, a proper characterization of FAZ using a method of
Res. Biomed. Eng.. Publicado em: 21/12/2017
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5. Image segmentation and particles classification using texture analysis method
Introduction: Ingredients of oily fish include a large amount of polyunsaturated fatty acids, which are important elements in various metabolic processes of humans, and have also been used to prevent diseases. However, in an attempt to reduce cost, recent developments are starting a replace the ingredients of fish oil with products of microalgae, that also p
Res. Biomed. Eng.. Publicado em: 09/09/2016
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6. A robust fully automatic lumen segmentation method for in vivo intracoronary optical coherence tomography
Abstract Introduction: Intravascular optical coherence tomography (IVOCT) is an in-vivo imaging modality based on the introduction of a catheter in a blood vessel for viewing its inner wall using electromagnetic radiation. One of the most developed automatic applications for this modality is the lumen area segmentation, however on the evaluation of these me
Res. Biomed. Eng.. Publicado em: 05/02/2016
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7. Segmenting mammographic microcalcifications using a semi-automatic procedure based on Otsu's method and morphological filters
INTRODUCTION: Breast cancer has the second highest world's incidence rate, according to the Brazilian National Cancer Institute (INCa). Clinical examination and mammography are the best methods for early diagnosis. Computer-aided detection (CADe) and computer-aided diagnosis (CADx) systems are developed to improve mammographic diagnosis. Basically, CADx syst
Rev. Bras. Eng. Bioméd.. Publicado em: 2013-12
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8. Segmentação de imagens SPECT/Gated-SPECT do miocárdio e geração de um mapa polar. / Segmentation of myocardial SPECT/Gated-SPECT images and polar map generation.
Tomografia computadorizada por emissão de fóton único (SPECT) é uma modalidade da medicina nuclear baseada na medida da distribuição espacial de um radionuclídeo. Esta técnica é amplamente utilizada em cardiologia para avaliar problemas de perfusão miocárdica, relacionados ao fluxo sanguíneo nas artérias coronárias. As imagens SPECT proporciona
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/05/2011
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9. Data clustering by optimum-path transform / Agrupamento de dados por florestas de caminhos otimos
This thesis proposes a novel approach for data clustering based on optimum-path forest. The samples are taken as nodes of a graph, whose arcs are defined by an adjacency relation. The nodes are weighted by their probability density values (pdf) and a connectivity function is maximized, such that each maximum of the pdf becomes root of an optimum-path tree (c
Publicado em: 2008
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10. Zona de empate : o elo entre transformadas de watershed e conexidade nebulosa / Tie-zone : the bridge between watershed transforms and fuzzy connectedness
This thesis introduces the new concept of tie-zone transform that unifies the multiple solutions of a watershed transform, by conserving only the common parts among them such that the differing parts constitute the tie zone. The tie zone applied to the watershed via image-foresting transform (TZ-IFTWT) proves to be a link between watershed transforms based o
Publicado em: 2007
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11. The weighted gradient: a color image gradient applied to morphological segmentation
This paper proposes a method for color gradient computation applied to morphological segmentation of color images. The weighted gradient (with weights estimated automatically), proposed in this paper, applied in conjunction with the watershed from markers technique, provides excelent segmentation results, according to a subjective visual criterion. The weigh
Journal of the Brazilian Computer Society. Publicado em: 2006-04
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12. Metasyntatic abilities and reading acquisition: a study with children in their first year of reading instruction / Habilidades metassintáticas e aprendizagem da leitura: estudo com crianças da 1 série do ensino fundamental
The overview of the literature shows strong evidence of the relationship between syntactic awareness and reading acquisition. This work aims at investigating specific relationships between implicit (epimorphosyntactic and episyntactic) and explicit (metamorphosyntactic and metasyntactic) syntactic abilities, and reading seen as word recognition and sentence
Publicado em: 2005