Image Analysis
Mostrando 1-12 de 2017 artigos, teses e dissertações.
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1. Strain analysis in diametral compression test through digital image correlation
Abstract In the search for alternatives to obtain more information from rock tests and to make them more accessible, this study applies the Digital Image Correlation technique (DIC 2D) in a diametral compression test called Brazilian Test, comparing the result measured by an extensometer with the result obtained by DIC. Rock tests provide information about r
REM - International Engineering Journal. Publicado em: 2022
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2. Sparse Estimation of the Precision Matrix and Plug-In Principle in Linear Discriminant Analysis for Hyperspectral Image Classification
ABSTRACT In this paper, a new method for supervised classification of hyperspectral images is proposed for the case in which the size of the training sample is small. It consists of replacing in the Mahalanobis distance the maximum likelihood estimator of the precision matrix by a sparse estimator. The method is compared with two other existing versions of L
Trends in Computational and Applied Mathematics. Publicado em: 2022
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3. EXPERIMENTO DIDÁTICO DE QUIMIOMETRIA EMPREGANDO IMAGENS DIGITAIS OBTIDAS POR CELULAR PARA DETERMINAR ADULTERAÇÃO DE AZEITE DE OLIVA COM ÓLEO DE SOJA: UM TUTORIAL, PARTE VI
The aim of this manuscript was to show the concepts involving data treatment of RGB based image analysis by univariate and multivariate approaches - the latter using Partial Least Squares (PLS) - using as a practical example application the determination of extravirgin olive oil adulteration. Digital images were collected using a device made of LEDs, batteri
Química Nova. Publicado em: 2022
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4. Agreement of adolescents’ self-perception of their body image with the analysis on the three-dimensional body image
Resumo Objetivos: verificar a concordância da autopercepção da imagem corporal de adolescentes com a análise de profissionais da saúde a partir de imagem corporal tridimensional e a concordância inter-avaliadores. Métodos: estudo transversal, com 1662 adolescentes, de 18-19 anos, da coorte de nascimento de 1997/98 de São Luís, Maranhão. A autoper
Revista Brasileira de Saúde Materno Infantil. Publicado em: 2022
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5. Intra- and inter-examiner reliability of digital images of skin donor areas in burns
SUMMARY OBJECTIVE: The main objective of this study was to evaluate intra- and inter-rater reliability in the analysis of digital images of donor areas for skin in burn patients using the CaPAS plugin in the ImageJ®. METHODS: Donor sites were reviewed by two independent reviewers in duplicate. The capture of images was standardized on the same device and
Revista da Associação Médica Brasileira. Publicado em: 2022
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6. CD45RO+TILs: cellular biomarkers for larynx squamous cell carcinoma outcome
Abstract Objective: The prognostic importance of Tumor-Infiltrating Lymphocytes (TILs) in the tumor microenvironment of various cancers is increasingly recognized. In the present study, we aimed to investigate the prognostic value of CD3+, CD4+, CD8+, and CD45RO + TILs and their relation to histopathological features in larynx squamous cell carcinoma. Meth
Brazilian Journal of Otorhinolaryngology. Publicado em: 2022
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7. Image analysis using X-ray to evaluate seed quality of Anadenanthera peregrina (L) Speg
Resumo Soluções baseadas em análise de imagens são uma tendência crescente para melhorar a qualidade das sementes florestais. Este estudo teve como objetivo associar as informações obtidas por meio do processamento de imagens radiográficas com o potencial fisiológico de sementes de Anadenanthera peregrina. Dez lotes de sementes de diferentes matrize
Ciência Florestal. Publicado em: 2022
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8. Proposal of a digital image analysis method for determining the carbonated front in concretes
Resumo A carbonatação é uma das patologias mais comuns em concretos e a correta determinação da profundidade atingida por este processo é fundamental para a previsão da vida útil de uma estrutura. O método mais comum para a medição da carbonatação é a aspersão de uma solução de fenolftaleína no concreto e posterior medição da área incolo
Ambiente Construído. Publicado em: 2022
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9. Use of a Portable Microscope Combined with a Smartphone to Determine the Authenticity of Brazilian Banknotes and National Driver’s Licenses
This study proposed using a portable microscope combined with a smartphone and application (PhotoMetrix® application) to evaluate the authenticity of Brazilian banknotes (R$50 and R$100) and national driver’s licenses (NDL) through image acquisition (Samsung S7) and chemometric treatment (principal component analysis (PCA)). Six regions of the banknote we
Journal of the Brazilian Chemical Society. Publicado em: 2022
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10. CLASSIFICATION OF Phaseolus lunatus L. USING IMAGE ANALYSIS AND MACHINE LEARNING MODELS
RESUMO - A análise de imagem associada com modelos de aprendizado de máquina pode ser uma excelente ferramenta de classificação para genótipos de fava, além de ser um sistema de baixo custo. A produção de feijão-fava é realizada por agricultores familiares, principalmente, nas regiões Nordeste e Sul do país, apresentando importância econômica e
Revista Caatinga. Publicado em: 2022
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11. Impressions of the chronic 900-MHz electromagnetic field in the prenatal period on Purkinje cells in male rat pup cerebella: is it worth mentioning?
SUMMARY OBJECTIVE: The aim of this study was to examine the changes on the Purkinje cells in the cerebella of male rat pups born to pregnant dams that were exposed to an electromagnetic field in the prenatal period. METHODS: The first stage of the study involved 12 Sprague-Dawley rats, 6 male and 6 female, weighing between 180 and 250 g. The female rats in
Revista da Associação Médica Brasileira. Publicado em: 2022
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12. Single-use flexible ureteroscopes: update and perspective in developing countries. A narrative review
ABSTRACT Flexible ureteroscopy is a well-established method for treatment of urinary stones but flexible ureteroscopes are expensive and fragile devices with a very limited lifetime. Since 2006 with the advent of digital flexible ureteroscopes a great evolution has occurred. The first single-use flexible ureteroscope was launched in 2011 and new models are c
International braz j urol. Publicado em: 2022