Multispectral Imagery
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. 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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2. 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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3. Hidrogeomorphologic and hidrosedimentologic analyses to compare two watersheds of Itaipu reservoir / Análises hidrogeomorfológicas para comparação de duas bacias hidrográficas contribuintes do reservatório de Itaipu
The aim of this research was to perform hidrogeomorphologic and hidrosedimentologic analyses and comparing two watersheds that drain into the reservoir Itaipu: Iguatemi-MS and Piquiri-PR. The hidrogeomorphologic analyses of the watersheds comprised evaluations of the potential sediment load yield through selected morfometric parameters. The hidrosedimentolog
Publicado em: 2009
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4. Road detection over informal settlements in a suburban area of Sao Paulo city by using high resolution satellite image and a object-based classification approach. / Detecção da malha viária na periferia urbana de São Paulo utilizando imagens de alta resolução espacial e classificação orientada a objetos.
Uncontrolled sprawl occurring in large cities of developing countries requires intensive mapping efforts to update geodatabases. The intense urbanization process experienced since the 70s in Sao Paulo city illustrates very well the reported scenario. Despite aerial data and, more recent, high spatial resolution satellite data which have been employed as basi
Publicado em: 2007
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5. Mapeamento de áreas susceptíveis a escorregamentos no município de Caraguatatuba (SP) usando técnicas de sensoriamento remoto e SIG / Landslide susceptibility mapping in Caraguatatuba (SP) municipality using remote sensing and gis techniques
The objective of the present research was the development of a quantitative approach for landslide susceptibility mapping using remote sensing and GIS techniques. In order to determine the best products for identifying landslide scars, six imagery fusion techniques (Brovey, HSV, PCA, IHS and two Wavelets) were evaluated and many geographical inference approa
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/09/2003
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6. Assinaturas espectrais de gossans associados a mineralizações de Pb-Zn-Ba na Bacia de Irece (BA) : um estudo baseado em dados de sensores TM e ASTER
The aim ofthis work was to develop strategies for detection ofgossans associated to Pb-Zn-Ba deposits in the Irece basin (BA), as well as their distinction ftom generic laterites, using remote sensing data and techniques. Samples of gossans collected in the study area were analysed by reflectance spectroscopy methods, using a high resolution FieldSpec FR spe
Publicado em: 2003
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7. Comparação entre imagens pancromaticas do satelite Ikonos-II e Landsat/ETM + na identificação de plantios de cafe (Coffea arabica)
The use of orbital remote sensing and geoprocessing techniques represents significant advance for agriculture data surveying, considering its multispectral feature and repetitiveness. Its application for crop monitoring becomes more important, mainly with the possibility of using the sensors of high spatial, spectral, temporal and radiometric resolution. Thi
Publicado em: 2002
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8. Analise de dados geologicos, geofisicos e de sensoriamento remoto para geração de modelos prospectivos para a região de Serra Leste, Carajas (PA)
The Serra Leste region, located in the northeast portion of the Carajás Mineral Province (State ofPará, Brazil), hosts several mineral deposits and mineralisations that are related to different geological settings. The Companhia Vale do Rio Doce holds the majority of the property claims in the region and motivated by its prospective potential, the company
Publicado em: 2002
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9. Uma arquitetura neural modular para classificação de imagens multiespectrais de sensoriamento remoto
This work presents an Artificial Neural Network (ANN) based architecture for the classification of Remote Sensing (RS) multispectral imagery. This architecture consists of two processing modules: an Image Feature Extraction Module using Kohonen s Self-Organizing Map (SOM) and a Classification Module using a Multi-Layer Perceptron (MLP) network. This architec
Publicado em: 1997
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10. Análise das características apresentadas em imagens multiespectrais do satélite LANDSAT no mapeamento geológico-estrutural da porção centro-oeste do escudo Sul-Riograndense / Analysis of the characteristics appearing in LANDSAT multispectral images in the geological structural mapping of the midwestern portion of the Rio Grande do Sul shield
The central-western part of Rio Grande do Sul Shield (limited by coordinates 30°00 to 31°30 South and 52°45 to 54°30 West) was geologically mapped to test the use of MSS-LANDSAT data in the study of mineralized regions. The visual interpretation of the images at the seale of 1:500,000 consisted, basically, in the identification and analysis of the differ
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/03/1982
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11. Processamento de dados multiespectrais, obtidos por plataformas orbitais da série LANDSAT, para estudos da qualidade da água na Baía de Guanabara / Processing multispectral data obtained by orbital platforms of the LANDSAT series for studies of water quality in Guanabara bay
In this paper we try to establish the grade of relationship existing among various Guanabara Bay water quality parameters and LANDSAT MSS video data. We have chosen an empirical: basis approach, but we had to select, from the available data, some parameters as follows: chlorophyll, water transparency using Secchi disk, salinity and dissolved ammonia. Only tw
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/06/1980
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12. Aplicação de sensoriamento remoto no estudo da província estanífera de Rondônia / Remote sensing application for the tin province of Rondônia.
The objective of Project Rondônia is the determination of patterns of automatic classification of intrusive granites belonging to the tin-bearing region of Rondônia and localized throughout nearly the totality of the Federal Territory of Rondônia. This project utilized LANDSAT multispectral imagery, copied on paper and on magnetic tapes (CCT-computer comp
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/05/1979