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Registro Completo |
Biblioteca(s): |
Embrapa Territorial. |
Data corrente: |
04/10/2011 |
Data da última atualização: |
03/05/2019 |
Tipo da produção científica: |
Artigo em Anais de Congresso |
Autoria: |
SANCHES, I. D. A.; ANDRADE, R. G.; QUARTAROLI, C. F.; RODRIGUES, C. A. G. |
Afiliação: |
IEDA DEL'ARCO SANCHES, Bolsista/CNPM; RICARDO GUIMARAES ANDRADE, CNPM; CARLOS FERNANDO QUARTAROLI, CNPM; CRISTINA APARECIDA G RODRIGUES, CNPM. |
Título: |
Análise comparativa de três métodos de correção atmosférica de imagens Landsat 5 - TM para obtenção de reflectância de superfície e NDVI. |
Ano de publicação: |
2011 |
Fonte/Imprenta: |
In: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 15., 2011, Curitiba. Anais... São José dos Campos: INPE, 2011. |
Páginas: |
p. 7564-7571. |
Idioma: |
Português |
Conteúdo: |
The present study has compared three methods of atmospheric correction, two dark object subtraction (DOS) methods and one method based on the fourth component of the tasseled cap transformation (TC4), to obtain reflectance and NDVI values of Landsat 5 ? TM satellite images. For each atmospheric correction method, reflectance and NDVI values of five targets (crop/pasture, forest, straw, bare soil and water) were analyzed in three images (Landsat path-row 222-75). The study area is localized in the west of Sao Paulo State, Brazil. The images were acquired on 29/10/2009, 02/02/2010 and 26/06/2010 with solar zenith angles of 28°, 34° and 55°, correspondingly. The TC4 was the only method which eliminated the haze in the image, but it is not recommended if the objective is to obtain reflectance values. The DOS methods did not removed the image haze but performed reasonably to obtain reflectance values. For the visible bands, both DOS methods analyzed performed well. The DOS method which considered the atmospheric transmittance (DOS2), although more indicated to correct the infrared bands, it is dependent of the image solar zenith angle. The image acquired under a zenith angle of 55°, after been corrected using the DOS2 method, presented reflectance values overestimated. Without the atmospheric correction the NDVI of vegetation targets tended to be underestimated. |
Palavras-Chave: |
Ângulo zenital; Estudos multitemporais; Subtração do pixel escuro; Transformação tasseled cap. |
Thesagro: |
Sensoriamento Remoto. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/42866/1/Ricardo-SBSR.pdf
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Marc: |
LEADER 02178nam a2200217 a 4500 001 1902348 005 2019-05-03 008 2011 bl uuuu u00u1 u #d 100 1 $aSANCHES, I. D. A. 245 $aAnálise comparativa de três métodos de correção atmosférica de imagens Landsat 5 - TM para obtenção de reflectância de superfície e NDVI. 260 $aIn: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 15., 2011, Curitiba. Anais... São José dos Campos: INPE$c2011 300 $ap. 7564-7571. 520 $aThe present study has compared three methods of atmospheric correction, two dark object subtraction (DOS) methods and one method based on the fourth component of the tasseled cap transformation (TC4), to obtain reflectance and NDVI values of Landsat 5 ? TM satellite images. For each atmospheric correction method, reflectance and NDVI values of five targets (crop/pasture, forest, straw, bare soil and water) were analyzed in three images (Landsat path-row 222-75). The study area is localized in the west of Sao Paulo State, Brazil. The images were acquired on 29/10/2009, 02/02/2010 and 26/06/2010 with solar zenith angles of 28°, 34° and 55°, correspondingly. The TC4 was the only method which eliminated the haze in the image, but it is not recommended if the objective is to obtain reflectance values. The DOS methods did not removed the image haze but performed reasonably to obtain reflectance values. For the visible bands, both DOS methods analyzed performed well. The DOS method which considered the atmospheric transmittance (DOS2), although more indicated to correct the infrared bands, it is dependent of the image solar zenith angle. The image acquired under a zenith angle of 55°, after been corrected using the DOS2 method, presented reflectance values overestimated. Without the atmospheric correction the NDVI of vegetation targets tended to be underestimated. 650 $aSensoriamento Remoto 653 $aÂngulo zenital 653 $aEstudos multitemporais 653 $aSubtração do pixel escuro 653 $aTransformação tasseled cap 700 1 $aANDRADE, R. G. 700 1 $aQUARTAROLI, C. F. 700 1 $aRODRIGUES, C. A. G.
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Embrapa Territorial (CNPM) |
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Registro Completo
Biblioteca(s): |
Embrapa Agroindústria Tropical. |
Data corrente: |
03/06/2020 |
Data da última atualização: |
28/06/2020 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 3 |
Autoria: |
COSTA, J. N. da; LEAL, A. R.; NASCIMENTO, L. G. L.; RODRIGUES, D. C.; MUNIZ, C. R.; FIGUEIREDO, R. W.; MATA, P.; NORONHA, J. P.; SOUSA, P. H. M. de. |
Afiliação: |
JULIANA N. DA COSTA, Departament of Food Engineering Federal University of Cear; AMANDA R. LEAL, Departament of Food Engineering Federal University of Cear; LUIS G. L. NASCIMENTO, Departament of Food Engineering Federal University of Ceara; DELANE C. RODRIGUES, Departament of Food Engineering Federal University of Ceara; CELLI RODRIGUES MUNIZ, CNPAT; RAIMUNDO W. FIGUEIREDO, Departament of Food Engineering Federal University of Ceara; PAULINA MATA, LAQV, REQUIMTE, Departament of Chemistry, Faculty of Science and Technology, New University of Lisbon; JOÃO PAULO NORONHA, LAQV, REQUIMTE, Departament of Chemistry, Faculty of Science and Technology, New University of Lisbon; PAULO HENRIQUE M. DE SOUSA, Departament of Food Engineering Federal University of Ceara. |
Título: |
Texture, microstructure and volatile profile of structured guava using agar and gellan gum. |
Ano de publicação: |
2020 |
Fonte/Imprenta: |
International Journal of Gastronomy and Food Science, 20, art. no. 100207, 2020. |
DOI: |
https://doi.org/10.1016/j.ijgfs.2020.100207 |
Idioma: |
Inglês |
Palavras-Chave: |
(COV); (VOCs); Compostos orgânicos voláteis; Frutas estruturadas; Goma gelana; Hidrocolóides; Microscopia eletrônica de varredura; Structured fruit; Texturometria; Texturometry. |
Thesagro: |
Agar. |
Thesaurus NAL: |
Gellan gum; Hydrocolloids; Scanning electron microscopy; Volatile organic compounds. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01218naa a2200397 a 4500 001 2122970 005 2020-06-28 008 2020 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.ijgfs.2020.100207$2DOI 100 1 $aCOSTA, J. N. da 245 $aTexture, microstructure and volatile profile of structured guava using agar and gellan gum.$h[electronic resource] 260 $c2020 650 $aGellan gum 650 $aHydrocolloids 650 $aScanning electron microscopy 650 $aVolatile organic compounds 650 $aAgar 653 $a(COV) 653 $a(VOCs) 653 $aCompostos orgânicos voláteis 653 $aFrutas estruturadas 653 $aGoma gelana 653 $aHidrocolóides 653 $aMicroscopia eletrônica de varredura 653 $aStructured fruit 653 $aTexturometria 653 $aTexturometry 700 1 $aLEAL, A. R. 700 1 $aNASCIMENTO, L. G. L. 700 1 $aRODRIGUES, D. C. 700 1 $aMUNIZ, C. R. 700 1 $aFIGUEIREDO, R. W. 700 1 $aMATA, P. 700 1 $aNORONHA, J. P. 700 1 $aSOUSA, P. H. M. de 773 $tInternational Journal of Gastronomy and Food Science, 20, art. no. 100207, 2020.
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