Image Processing Digital Techniques
Mostrando 1-12 de 86 artigos, teses e dissertações.
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1. Detection of foliar diseases using image processing techniques
ABSTRACT This paper presents the development of a methodology to detect the percentage of affected area of Phytophthora infestans disease in tomato plants, using digital image processing techniques to extract the regions of interest with color analysis, where the YIQ and TSL models for the detection of the disease. The method consists of solving one of the m
Rev. Ceres. Publicado em: 2020-04
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2. Metodología ad hoc para la observación de superficies de desgaste y fractura
ABSTRACT In the present work, a methodology of microscopic analysis and measurement of wear surfaces is presented, based on images made using digital processing techniques such as stitching and stac-king. The images are obtained from an ad-hoc and low-cost microscopic observation system, consisting of sample positioning and focus-elevation modules with micro
Matéria (Rio J.). Publicado em: 19/07/2018
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3. Performance evaluation of nebulizers based on aerodynamic droplet diameter characterization using the Direct Laminar Incidence (DLI)
Abstract Introduction Optical microscope images can be useful to evaluate nebulizers considering the size of droplets produced by these devices. From this perspective, the proposed method was compared to the classic concept of Mass Median Aerodynamic Diameter (MMAD) for the ideal droplet size between 0.5-5.5 µm. Methods We tested a sample of five home neb
Res. Biomed. Eng.. Publicado em: 29/06/2017
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4. Recuperação de vídeos comprimidos por conteúdo / Content-based retrieval of compressed videos
Recent advances in the technology have enabled the increase of the availability of video data, creating large digital video collections. This has spurred great interest in systems that are able to manage those data in a efficient way. Making efficient use of video information requires the development of powerful tools to extract high-level semantics from low
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/11/2011
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5. Extensiometria óptica por Moiré geométrico digital para anãlise de tensões no plano / Optical extensometry by digital geometric Moiré for in-plane stress analysis
The study of the behavior of building structures pass through the determination of the strain and stresses to evaluate the level of local and global security against the active actions. In the last years in Brazil, the extensometers have been commonly used to measure the strain at a specific single point. The optical extensometry presents itself as an altern
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/06/2011
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6. Técnicas de equalização de canais de comunicação aplicadas a imagens. / Equalization techniques for communications channels applied to images.
O objetivo da desconvolução autodidata de imagens é reconstruir a imagem original a partir de uma imagem degradada sem usar informação da imagem real ou da função de degradação. O processo de reconstrução é crítico em aplicações em que a imagem original ou suas características estatísticas não são conhecidas. Fazendo um mapeamento da image
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/04/2011
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7. BUILDING 3D DETECTION AND EXTRACTION IN INFORMAL SETTLEMENT AREAS / DETECÇÃO E EXTRAÇÃO 3D DE EDIFICAÇÕES EM ÁREAS DE ASSENTAMENTOS INFORMAIS
Informal settlements in many Brazilian urban centers are growing up quickly. Remote Sensing techniques provide a cost-effective mean to measure such an expansion. In cities with rough topography, like the city of Rio de Janeiro, the initial expansion, predominantly horizontal, is gradually being shifted to vertical, as new floors are being built on the exist
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/04/2011
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8. Quantificação do índice de vazios do solo utilizando técnicas de processamento de imagens digitais.
RESUMO: Este trabalho apresenta uma abordagem metodológica para obter o índice de vazios de solo (e) utilizando técnicas de processamento de imagens. Como esse método permite uma obtenção automática, o procedimento pode ser considerado mais fácil, mais rápido e mais preciso que técnicas convencionais. A metodologia está baseada na classificação
Planaltina. Publicado em: 2011
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9. Compartimentação geomorfológica do Parque Nacional da Chapada dos Veadeiros baseada em técnicas de geoprocessamento.
ABSTRACT: The necessity of creating a main plan for national parks is necessary for the technique's improvement for a better understanding of the environmental factors thar interfere in the conservation of these units. In this context, image processing techniques are important tools in this characterization. In this paper, we describe the use of the terrain
Planaltina. Publicado em: 2011
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10. Objetos tecnopoéticos : transmutações de imagens do repulsivo
The artistic proposal ¿Technopoetic Objects: Transmutations of Images of the Repulsive¿ discusses poetic experimentation using digital painting, video art, computer and control interfaces. In this thesis, Technopoetics use principles such as numerical representation, modularity, automation, variability and transcoding. Technology is explored as a tool for
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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11. Segmentação das áreas isquêmicas no acidente vascular cerebral utilizando imagens de tomografia computadorizada de perfusão / Segmentation of ischemic areas in stroke using perfusion computed tomography images
The techniques of digital image processing have been widely applied to medical imaging. One of the benefits brought about by these tools is to provide measurements of parameters that are difficult to estimate and likely to bias the physician. This study aimed to develop semi-automatic software of segmentation of the ischemic areas, core and penumbra in strok
Publicado em: 2011
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12. Detecção de mudanças a partir de imagens de fração
Land cover change detection is a major goal in multitemporal remote sensing applications. It is well known that images acquired on different dates tend to be highly influenced by radiometric differences and registration problems. Using fraction images, obtained from the linear model of spectral mixing (LMSM), radiometric problems can be minimized and the int
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011