Desenvolvimento de algoritmos e ferramentas computacionais para suporte na caracterização microestrutural de materiais através de imagens de microscopia eletrônica
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Biblioteca Digital de Teses e Dissertações da UFPB |
Texto Completo: | https://repositorio.ufpb.br/jspui/handle/123456789/22227 |
Resumo: | The development of functional materials with specific properties is intrinsically dependent on microstructural characteristics. Especially with the increase in the production of materials that use nanotechnology, where the effects of interface, distribution and phase composition on properties are striking, the precise and fast analysis of materials on a microscopic scale becomes imperative in the development process. In this sense, the analysis of microscopic images requires methods that incorporate computational tools that minimize subjective interpretations due to the complexity of the images and, at the same time, the high number of data generated. Although there are several computer programs available for image analysis, there are subtlety of microstructural analysis that are deeply connected with the nature of the materials, so that the image analysis response can incorporate chemical information, such as phase composition. . In fact, considering the scope of the literature review of this work, no computer program automatically addresses the chemical nuances referred to a priori. The thesis defended in this work is that it is possible to obtain automatic quantitative analyzes in polycrystalline materials from scanning electron microscopy images in backscattered mode. Therefore, a computational tool capable of quantitatively determining the degree of dispersion of the constituent phases as well as their compositions was developed. Therefore, an algorithm was developed that estimates the average gray tone of a phase based on the coefficient of retransmitted electrons and incorporated a clustering method using the K-Means optimization routine. Two particle scattering indicator algorithms based on entropy and co-occurrence were also incorporated. The validation of the routine was obtained from simulated images (benchmarks) with which the recovery of the values imposed on the images and other efficiency parameters of the automatic analysis process was verified. With the validation, the program was applied to the analysis of the phase distribution in polycrystalline rocks and in phase images present in a template sample, where its chemical composition is known a priori. The implemented algorithm for the identification of the gray level of the phases proved to be efficient and robust, estimating with good precision the expected average tone for each phase of the samples. The clustering method using the ZK-Means optimization routine presented excellent segmentation, recovering the values imposed on the simulated images in the analysis process. Particle dispersion indicator algorithms generated 2D and 3D graphics, which can be used to observe their relationship with material properties. The tools proved to be promising, and it was possible to verify their effectiveness in determining the phases and their distributions. |
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Desenvolvimento de algoritmos e ferramentas computacionais para suporte na caracterização microestrutural de materiais através de imagens de microscopia eletrônicaProcessamento de imagensClusterizaçãoMicroestruturas de materiaisMicroscopia eletrônica de varreduraAnálise de texturaMeta-heurísticasImage processingClusteringMaterials microstructuresScanning electron microscopyTexture analysisMeta-heuristicsCNPQ::ENGENHARIASThe development of functional materials with specific properties is intrinsically dependent on microstructural characteristics. Especially with the increase in the production of materials that use nanotechnology, where the effects of interface, distribution and phase composition on properties are striking, the precise and fast analysis of materials on a microscopic scale becomes imperative in the development process. In this sense, the analysis of microscopic images requires methods that incorporate computational tools that minimize subjective interpretations due to the complexity of the images and, at the same time, the high number of data generated. Although there are several computer programs available for image analysis, there are subtlety of microstructural analysis that are deeply connected with the nature of the materials, so that the image analysis response can incorporate chemical information, such as phase composition. . In fact, considering the scope of the literature review of this work, no computer program automatically addresses the chemical nuances referred to a priori. The thesis defended in this work is that it is possible to obtain automatic quantitative analyzes in polycrystalline materials from scanning electron microscopy images in backscattered mode. Therefore, a computational tool capable of quantitatively determining the degree of dispersion of the constituent phases as well as their compositions was developed. Therefore, an algorithm was developed that estimates the average gray tone of a phase based on the coefficient of retransmitted electrons and incorporated a clustering method using the K-Means optimization routine. Two particle scattering indicator algorithms based on entropy and co-occurrence were also incorporated. The validation of the routine was obtained from simulated images (benchmarks) with which the recovery of the values imposed on the images and other efficiency parameters of the automatic analysis process was verified. With the validation, the program was applied to the analysis of the phase distribution in polycrystalline rocks and in phase images present in a template sample, where its chemical composition is known a priori. The implemented algorithm for the identification of the gray level of the phases proved to be efficient and robust, estimating with good precision the expected average tone for each phase of the samples. The clustering method using the ZK-Means optimization routine presented excellent segmentation, recovering the values imposed on the simulated images in the analysis process. Particle dispersion indicator algorithms generated 2D and 3D graphics, which can be used to observe their relationship with material properties. The tools proved to be promising, and it was possible to verify their effectiveness in determining the phases and their distributions.NenhumaO desenvolvimento de materiais funcionais com propriedades específicas depende intrinse camente de características microestruturais. Especialmente com o aumento na produção de materiais que utilizam nanotecnologia, onde efeitos de interface, de distribuição e de composição de fases nas propriedades são marcantes, a análise precisa e rápida de materiais em escala microscópica passa a ser imperativa no processo de desenvolvimento. Nesse sentido, a análise de imagens microscópicas necessita de métodos que incorporem ferra mentas computacionais que minimizem interpretações subjetivas devido à complexidade das imagens e, ao mesmo tempo, pelo elevado número de dados gerados. Apesar de haver vários programas computacionais disponíveis para análise de imagens, existem nuances da análise microestrutural que se conectam profundamente com a natureza dos materiais, de forma que a resposta da análise da imagem pode incorporar informações de natureza química, como por exemplo a composição da fase. De fato, considerando o alcance da revisão da literatura desse trabalho, nenhum programa computacional aborda, de forma automática, as nuances químicas referidas a priori. A tese defendida nesse trabalho é de que é possível obter análises automáticas quantitativas em materiais policristalinos a partir de imagens de microscopia eletrônica de varredura em modo retroespalhado. Portanto, desenvolveu-se uma ferramenta computacional capaz de determinar quantitativamente o grau de dispersão das fases constituintes bem como suas composições. Para tanto, foi desenvolvido um algoritmo que estima o tom de cinza médio de uma fase baseado no coefi ciente de elétrons retransmitidos e incorporado um método de clusterização, utilizando-se da rotina de otimização K-Means. Também foram incorporados dois algoritmos indicadores de dispersão de partículas, baseados em entropia e coocorrência. A validação da rotina foi obtida a partir de imagens simuladas (benchmarks) com as quais verificou-se a recuperação dos valores impostos às imagens e outros parâmetros de eficiência do processo automático da análise. Com a validação, o programa foi aplicado à análise da distribuição de fases em rochas policristalinas e em imagens de fases presentes em uma amostra gabarito, onde sua composição química é conhecida a priori. O algoritmo implementado para a identificação do nível de cinza das fases mostrou-se eficiente e robusto, estimando com boa precisão o tom médio esperado para cada fase das amostras. O método de clusterização utilizando a rotina de otimização ZK-Means apresentou ótima segmentação, recuperando os valores impostos às imagens simuladas no processo de análise. Os algoritmos indicadores de dispersão de partículas geraram gráficos 2D e 3D, os quais poderão ser utilizados para observar a relação destes com as propriedades dos materiais. As ferramentas mostraram-se promissoras, tendo sido possível verificar suas eficácias na determinação das fases e suas distribuições.Universidade Federal da ParaíbaBrasilEngenharia de MateriaisPrograma de Pós-Graduação em Ciência e Engenharia de MateriaisUFPBLima Filho, Marçal Rosas Florentinohttp://lattes.cnpq.br/2852416174296757Bonotto, Edison Luiz2022-02-25T18:27:33Z2021-09-102022-02-25T18:27:33Z2021-08-10info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesishttps://repositorio.ufpb.br/jspui/handle/123456789/22227porAttribution-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nd/3.0/br/info:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da UFPBinstname:Universidade Federal da Paraíba (UFPB)instacron:UFPB2022-04-26T16:57:06Zoai:repositorio.ufpb.br:123456789/22227Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufpb.br/PUBhttp://tede.biblioteca.ufpb.br:8080/oai/requestdiretoria@ufpb.br|| diretoria@ufpb.bropendoar:2022-04-26T16:57:06Biblioteca Digital de Teses e Dissertações da UFPB - Universidade Federal da Paraíba (UFPB)false |
dc.title.none.fl_str_mv |
Desenvolvimento de algoritmos e ferramentas computacionais para suporte na caracterização microestrutural de materiais através de imagens de microscopia eletrônica |
title |
Desenvolvimento de algoritmos e ferramentas computacionais para suporte na caracterização microestrutural de materiais através de imagens de microscopia eletrônica |
spellingShingle |
Desenvolvimento de algoritmos e ferramentas computacionais para suporte na caracterização microestrutural de materiais através de imagens de microscopia eletrônica Bonotto, Edison Luiz Processamento de imagens Clusterização Microestruturas de materiais Microscopia eletrônica de varredura Análise de textura Meta-heurísticas Image processing Clustering Materials microstructures Scanning electron microscopy Texture analysis Meta-heuristics CNPQ::ENGENHARIAS |
title_short |
Desenvolvimento de algoritmos e ferramentas computacionais para suporte na caracterização microestrutural de materiais através de imagens de microscopia eletrônica |
title_full |
Desenvolvimento de algoritmos e ferramentas computacionais para suporte na caracterização microestrutural de materiais através de imagens de microscopia eletrônica |
title_fullStr |
Desenvolvimento de algoritmos e ferramentas computacionais para suporte na caracterização microestrutural de materiais através de imagens de microscopia eletrônica |
title_full_unstemmed |
Desenvolvimento de algoritmos e ferramentas computacionais para suporte na caracterização microestrutural de materiais através de imagens de microscopia eletrônica |
title_sort |
Desenvolvimento de algoritmos e ferramentas computacionais para suporte na caracterização microestrutural de materiais através de imagens de microscopia eletrônica |
author |
Bonotto, Edison Luiz |
author_facet |
Bonotto, Edison Luiz |
author_role |
author |
dc.contributor.none.fl_str_mv |
Lima Filho, Marçal Rosas Florentino http://lattes.cnpq.br/2852416174296757 |
dc.contributor.author.fl_str_mv |
Bonotto, Edison Luiz |
dc.subject.por.fl_str_mv |
Processamento de imagens Clusterização Microestruturas de materiais Microscopia eletrônica de varredura Análise de textura Meta-heurísticas Image processing Clustering Materials microstructures Scanning electron microscopy Texture analysis Meta-heuristics CNPQ::ENGENHARIAS |
topic |
Processamento de imagens Clusterização Microestruturas de materiais Microscopia eletrônica de varredura Análise de textura Meta-heurísticas Image processing Clustering Materials microstructures Scanning electron microscopy Texture analysis Meta-heuristics CNPQ::ENGENHARIAS |
description |
The development of functional materials with specific properties is intrinsically dependent on microstructural characteristics. Especially with the increase in the production of materials that use nanotechnology, where the effects of interface, distribution and phase composition on properties are striking, the precise and fast analysis of materials on a microscopic scale becomes imperative in the development process. In this sense, the analysis of microscopic images requires methods that incorporate computational tools that minimize subjective interpretations due to the complexity of the images and, at the same time, the high number of data generated. Although there are several computer programs available for image analysis, there are subtlety of microstructural analysis that are deeply connected with the nature of the materials, so that the image analysis response can incorporate chemical information, such as phase composition. . In fact, considering the scope of the literature review of this work, no computer program automatically addresses the chemical nuances referred to a priori. The thesis defended in this work is that it is possible to obtain automatic quantitative analyzes in polycrystalline materials from scanning electron microscopy images in backscattered mode. Therefore, a computational tool capable of quantitatively determining the degree of dispersion of the constituent phases as well as their compositions was developed. Therefore, an algorithm was developed that estimates the average gray tone of a phase based on the coefficient of retransmitted electrons and incorporated a clustering method using the K-Means optimization routine. Two particle scattering indicator algorithms based on entropy and co-occurrence were also incorporated. The validation of the routine was obtained from simulated images (benchmarks) with which the recovery of the values imposed on the images and other efficiency parameters of the automatic analysis process was verified. With the validation, the program was applied to the analysis of the phase distribution in polycrystalline rocks and in phase images present in a template sample, where its chemical composition is known a priori. The implemented algorithm for the identification of the gray level of the phases proved to be efficient and robust, estimating with good precision the expected average tone for each phase of the samples. The clustering method using the ZK-Means optimization routine presented excellent segmentation, recovering the values imposed on the simulated images in the analysis process. Particle dispersion indicator algorithms generated 2D and 3D graphics, which can be used to observe their relationship with material properties. The tools proved to be promising, and it was possible to verify their effectiveness in determining the phases and their distributions. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-09-10 2021-08-10 2022-02-25T18:27:33Z 2022-02-25T18:27:33Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufpb.br/jspui/handle/123456789/22227 |
url |
https://repositorio.ufpb.br/jspui/handle/123456789/22227 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
Attribution-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nd/3.0/br/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nd/3.0/br/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal da Paraíba Brasil Engenharia de Materiais Programa de Pós-Graduação em Ciência e Engenharia de Materiais UFPB |
publisher.none.fl_str_mv |
Universidade Federal da Paraíba Brasil Engenharia de Materiais Programa de Pós-Graduação em Ciência e Engenharia de Materiais UFPB |
dc.source.none.fl_str_mv |
reponame:Biblioteca Digital de Teses e Dissertações da UFPB instname:Universidade Federal da Paraíba (UFPB) instacron:UFPB |
instname_str |
Universidade Federal da Paraíba (UFPB) |
instacron_str |
UFPB |
institution |
UFPB |
reponame_str |
Biblioteca Digital de Teses e Dissertações da UFPB |
collection |
Biblioteca Digital de Teses e Dissertações da UFPB |
repository.name.fl_str_mv |
Biblioteca Digital de Teses e Dissertações da UFPB - Universidade Federal da Paraíba (UFPB) |
repository.mail.fl_str_mv |
diretoria@ufpb.br|| diretoria@ufpb.br |
_version_ |
1801842988461064192 |