Multispectral Images
Mostrando 1-12 de 46 artigos, teses e dissertações.
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1. COMPARING A SINGLE-SENSOR CAMERA WITH A MULTISENSOR CAMERA FOR MONITORING COFFEE CROP USING UNMANNED AERIAL VEHICLES
ABSTRACT There exist two options for digital cameras that can capture the near-infrared (NIR) band. Conventional red–green–blue (RGB, visible bands) cameras with a single sensor provide NIR band visibility based on the removal of the internal NIR-blocking filter. Alternatively, multisensor cameras exist that have a specific sensor for each band. The modi
Eng. Agríc.. Publicado em: 2021-02
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2. EVALUATION OF THE RADIOMETRIC ACCURACY OF IMAGES OBTAINED BY A SEQUOIA MULTISPECTRAL CAMERA
ABSTRACT Geometric and radiometric corrections of images obtained by remotely piloted aircraft systems (RPAS) are required for the measurement of the spectral reflectance and calculation of vegetation indices. This study aimed to determine which radiometric calibration procedures allow obtaining suborbital images with more accurate reflectance data and spect
Eng. Agríc.. Publicado em: 2020-12
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3. Analysis of cloud condition on Sentinel-2 MSI and Landsat-8 OLI images of a public supply lake in Belém-Pará-Brazil
Resumo O processo de eutrofização leva à redução da qualidade da água e a perdas econômicas no mundo todo. Além disso, é possível aplicar técnicas de sensoriamento remoto para o monitoramento de ambientes aquáticos. Neste estudo, objetivou-se analisar o uso combinado dos dados Sentinel-2 Multispectral Instrument e Landsat-8 Operational Land Image
Rev. Ambient. Água. Publicado em: 15/07/2019
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4. DESHADOWING OF HIGH SPATIAL RESOLUTION IMAGERY APPLIED TO URBAN AREA DETECTION
Abstract Different built-up structures usually lead to large regions covered by shadows, causing partial or total loss of information present in urban environments. In order to mitigate the presence of shadows while improving the urban target discrimination in multispectral images, this paper proposes an automated methodology for both detection and recovery
Bol. Ciênc. Geod.. Publicado em: 10/07/2019
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5. Sensoriamento remoto multiespectral na identificação e mapeamento das variáveis bióticas e abióticas do cafeeiro
RESUMO O sensoriamento remoto multiespectral apresenta-se como metodologia confiável e viável para auxiliar o produtor na decisão para melhores práticas de manejo, garantindo uma produção agrícola mais eficiente e sustentável. Objetivou-se, com este trabalho, identificar e mapear o estresse em lavoura cafeeira, causado por variáveis bióticas e abi�
Rev. Ceres. Publicado em: 06/06/2019
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6. Quality Evaluation of Chromatic Interpolation Algorithms for Image Acquisition System
ABSTRACT The main goal of the Libertad 2 mission is to take images of the Earth’s surface in the visible spectrum with a multispectral sensor and send them as a Bayer array. To carry out the reconstruction in land of these images and to view them in a RGB color model, it is necessary to use a color interpolation algorithm to determine the values of the dif
J. Aerosp. Technol. Manag.. Publicado em: 2016-09
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7. Geotechnology application for data acquisition for agricultural and environmental management of the municipality of Vitória Brazil-SP
ABSTRACT The present study aimed at associating geoprocessing procedures for analysis of land use and native vegetation for municipal management, using an easy access and low cost methodology to the public administration of the municipality of Vitória Brazil/SP. Initially, the land use and the land occupation were evaluated, being delimited the municipal hy
Eng. Agríc.. Publicado em: 2016-08
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8. Chlorophyll a spatial inference using artificial neural network from multispectral images and in situ measurements
Considerando a importância do monitoramento de parâmetros da qualidade da água, o sensoriamento remoto é uma alternativa viável à detecção de variáveis limnológicas que possuem propriedades de interação com a radiação eletromagnética, chamadas componentes opticamente ativos (COA). Dentre esses, cita-se a clorofila a, que é o pigmento mais rep
An. Acad. Bras. Ciênc.. Publicado em: 17/05/2013
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9. Efeitos do uso e cobertura do solo sobre o conforto higrotérmico / Effects of the use and soil cover on the hygrothermal comfort
Given the importance of obtaining an urban design based on the microclimate and the possibility of the use of trees as a factor in mitigation of urban distress, this study evaluated the effect caused by three different spatial arrangements of urban forests and the use and occupation on soil in temperature and humidity of the environment in surroundings area.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2012
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10. Identificacao e quantificacao de impurezas e misturas em cafe torrado e moido por analise de imagens.
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Planaltina: Embrapa Cerrados. Publicado em: 2011
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11. Desenvolvimento e avaliação de um sistema de imagem multiespectral para o diagnóstico óptico de lesões neoplásicas. / Assembly and evaluation of a multispectral widefield imaging system for the detection of malignant lesions.
The increase of life expectancy associated to healthless habits results in a higher probability of tumor development. In this sense, cancer has been increasingly considered an important health public concern. The conventional methods for cancer detection are not efficient for the acquisition of a fast and precise diagnostics. In this study we present a widef
Publicado em: 2010
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12. Combinação de modelos de campos aleatórios markovianos para classificação contextual de imagens multiespectrais / Combining markov random field models for multispectral image contextual classification
This work presents a novel MAP-MRF approach for multispectral image contextual classification by combining higher-order Markov Random Field models. The statistical modeling follows the Bayesian paradigm, with the definition of a multispectral Gaussian Markov Random Field model for the observations and a Potts MRF model to represent the a priori knowledge. In
Publicado em: 2010