Multispectral Images
Mostrando 25-36 de 46 artigos, teses e dissertações.
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25. Hydrothermal alteration of the Cerro La Mina gold prospect, Los Menucos, Patagonia Argentina : geology, remote sensing and stable isotopes / Alteração hidrotermal do prospecto aurifero Cerro La Mina, Los Menucos, Patagonia Argentina : geologia , sensoriamento remoto e isotopos estaveis
The epithermal Cerro La Mina prospect, located in the Los Menucos region, Patagonia Argentina, is currently being explored for epithermal precious-metal mineralization. Triassic hydrothermal activity produced intense alteration of rhyolites, andesites, ignimbrites, and tuffs of the Middle- to Late Triassic Los Menucos Group, in the Somún Curá massif. The u
Publicado em: 2007
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26. Classificação de imagens tomográficas de ciência dos solos utilizando redes neurais e combinação de classificadores.
Pattern Recognition is a subject being used in a multidisciplinary scope, with different approaches. One of them is its application in computerized tomography images, commonly acquired in order to do medical diagnosis, but they have been used in several other applications as well, including Soil Science. The objective of this work is to study and to discuss
Publicado em: 2006
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27. Estimativa da temperatura e do saldo de radiação à superfície terrestre em Maceió-AL utilizando imagens TM/LANDSAT 5
The considered work esteem, by means of data of multispectral images of the Landsat 5 - TM, vegetation indices, albedo, surface temperature surface and the balance of radiation of the city of Maceió relating them with the urban mesh. The city of Maceió, in last the 30 years, it had its intensified areal growth, that is, the substitution of green areas for
Publicado em: 2006
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28. Estimação da resolução espacial da câmera CCD dos satélites CBERS 1 e 2 / Spatial resolution estimation of CBERS CCD camera
The first China-Brazil Earth Resources Satellite (CBERS-1) was launched in 1999 and was substituted on 2003 by CBERS-2. CBERS- 1 and CBERS-2 have the same specifications and carry three sensors: a Wide Field Imager (WFI), a High Resolution CCD Camera (CCD) and an Infrared Multispectral Scanner (IRMSS). Due to the limitations of the sensor components (diffrac
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/03/2005
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29. Combinação de múltiplos classificadores para identificação de materiais em imagens ruidosas.
Material identification in images has been explored in multiple areas and very interesting applications are arising in this field. This work uses noisy multispectral images from a computerized tomograph scanner acquired with multiple energies for soil sciences applications and developes a recognition system to identify materials on the scanned body. Techniqu
Publicado em: 2004
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30. Characterization of vegetation physiognomies in earstern Amazonon region through airbone videography and landsat 7 ETM + images / Caracterização de fisionomias vegetais na Amazônia Oriental através de videografia aerotransportada e imagens landsat 7 ETM+
Transformation of multispectral remote sensing data is needed for compression of data volume and for the inference of biophysical properties of the land cover. Linear Spectral Mixing Models (LSMM) and Normalized Difference Vegetation Index (NDVI) are transformations that result in indicators of vegetation structure. However these methods present limitations
Publicado em: 2003
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31. 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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32. Estudo de mineralizações de tipo Cu-porfiro do sul do Peru por meio de sensoriamento remoto e aeromagnetometria
A large number of mineral deposits are known in the Andes, including Cu-porphyry deposits. Among these, Cuajone, Quellaveco and Toquepala are some of the most important in the southern portion of Peru. They are located in the domain ofthe Bolivian Orocline, within the Incapuquio shear zone, a structure that controls the mineralization, ofabout 60 Ma. Airborn
Publicado em: 2002
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33. 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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34. Integração de técnicas de geoprocessamento e levantamento participativo de informações sócio-ambientais: um subsídio para a reforma agrária / Integration of geoprocessing and social and environmental participative survey techniques: a subsidy for agrarian reform
O trabalho desenvolvido compôs-se de três etapas básicas, sendo a primeira referente aos aspectos sócio-econômicos e culturais do assentado, o resgate da sua origem, seu sonho e pretensão para com a terra; a segunda refere-se ao levantamento de dados e análise do ambiente, e a terceira e última etapa integra os dados e informações sócio- econômic
Publicado em: 2002
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35. Paralelização de um classificador contextual de imagens / Parallelimplementationofcontextualclassiferforremotesensingimages
This work presents basic concepts about digital image processing, with emphasis on classification of images from multi-spectral sensors. We have chosen two classification algorithms (MAXVER and ICM), to exemplify the application of the proposed methodologies. Before showing these methodologies, we evaluated the situation of present algorithms, in the SPRING
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/06/2000
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36. Paralelização de um classificador contextual de imagens / Parallelimplementationofcontextualclassiferforremotesensingimages
This work presents basic concepts about digital image processing, with emphasis on classification of images from multi-spectral sensors. We have chosen two classification algorithms (MAXVER and ICM), to exemplify the application of the proposed methodologies. Before showing these methodologies, we evaluated the situation of present algorithms, in the SPRING
Publicado em: 2000