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Registro Completo |
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Biblioteca(s): |
Embrapa Territorial. |
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Data corrente: |
04/10/2011 |
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Data da última atualização: |
03/05/2019 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
SANCHES, I. D. A.; ANDRADE, R. G.; QUARTAROLI, C. F.; RODRIGUES, C. A. G. |
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Afiliação: |
IEDA DEL'ARCO SANCHES, Bolsista/CNPM; RICARDO GUIMARAES ANDRADE, CNPM; CARLOS FERNANDO QUARTAROLI, CNPM; CRISTINA APARECIDA G RODRIGUES, CNPM. |
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Título: |
Análise comparativa de três métodos de correção atmosférica de imagens Landsat 5 - TM para obtenção de reflectância de superfície e NDVI. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
In: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 15., 2011, Curitiba. Anais... São José dos Campos: INPE, 2011. |
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Páginas: |
p. 7564-7571. |
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Idioma: |
Português |
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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. |
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Palavras-Chave: |
Ângulo zenital; Estudos multitemporais; Subtração do pixel escuro; Transformação tasseled cap. |
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Thesagro: |
Sensoriamento Remoto. |
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Categoria do assunto: |
-- |
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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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Registro original: |
Embrapa Territorial (CNPM) |
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Biblioteca |
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Origem |
Tipo/Formato |
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Registro |
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URL |
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
19/10/2018 |
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Data da última atualização: |
19/10/2018 |
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Autoria: |
PETRUS, L. C.; CASTRO, J. R.; MANTOVANI, M. M.; GIMENES, A. M.; DUARTE, C. N.; GOLDFEDER, G. T.; SCHWARTZ, D. S.; LARSSON, M. H. M. A. |
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Afiliação: |
Lilian C. Petrus; Jacqueline R. Castro, Departamento de Clínica Médica/Faculdade de Medicina Veterinária e Zootecnia/Universidade de São Paulo - USP; Matheus M. Mantovani, Departamento de Clínica Médica/Faculdade de Medicina Veterinária e Zootecnia/Universidade de São Paulo - USP; André M. Gimenes, Departamento de Clínica Médica/Faculdade de Medicina Veterinária e Zootecnia/Universidade de São Paulo - USP; Caio N. Duarte, Departamento de Clínica Médica/Faculdade de Medicina Veterinária e Zootecnia/Universidade de São Paulo - USP; Guilherme T. Goldfeder, Departamento de Clínica Médica/Faculdade de Medicina Veterinária e Zootecnia/Universidade de São Paulo - USP; Denise S. Schwartz, Departamento de Clínica Médica/Faculdade de Medicina Veterinária e Zootecnia/Universidade de São Paulo - USP; Maria Helena M. A. Larsson, Departamento de Clínica Médica/Faculdade de Medicina Veterinária e Zootecnia/Universidade de São Paulo - USP. |
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Título: |
Left atrial size and contractile function in healthy dogs and dogs with chronic mitral valve disease. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Pesquisa Veterinária Brasileira, Brasília, DF, v. 38, n 8, p. 1678-5150, agosto 2018 |
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Idioma: |
Inglês |
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Notas: |
Título em português: Tamanho e função sistólica atrial esquerda em cães sadios e com doença valvar crônica de mitral. |
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Conteúdo: |
In humans, left atrial enlargement and reduced contractile functions are associated with adverse cardiovascular events and a poor prognosis in many dilatation of the left atrium occurs with the gradual evolution of chronic mitral valve disease and is well diseases. The left atrium is the most compromised cardiac chamber in dogs with chronic mitral valve disease (CMVD). Therefore, this study aimed to compare the main parameters of left atrial enlargement (left atrium/aorta ratio, left atrial diameter and volume indices) and contractile function (transmitral flow peak velocity A wave and time velocity integral, atrial fraction, and atrial ejection force) at different stages of valve disease, and correlate the left atrial diameter, volume, and contractile function indices with echocardiographic variables predictive of heart failure in dogs (transmitral flow peak velocity E wave, E wave/IVRT ratio, E wave/E´wave ratio, and E wave/A wave ratio). The results showed that progressive characterized by the left atrium/aorta ratio and left atrium volume index. The left atrial diameter and volume indices and left atrium/aorta ratio correlated positively with the transmitral flow peak velocity E wave and E wave/IVRT ratio, which are important indices of diastolic function. The left atrial contractile function indices increased as CMVD evolved. Except for the atrial fraction, the left atrial contractile function indices correlated with the left ventricular filling pressure indices. |
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Palavras-Chave: |
Chronic mitral valve disease; Left atrial contractile function; Left atrial size; Left ventricular filling pressure. |
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Thesaurus NAL: |
Dogs; Heart. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/184760/1/Left-atrial-size-and-contractile-function.pdf
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Marc: |
LEADER 02515naa a2200289 a 4500
001 2097792
005 2018-10-19
008 2018 bl uuuu u00u1 u #d
100 1 $aPETRUS, L. C.
245 $aLeft atrial size and contractile function in healthy dogs and dogs with chronic mitral valve disease.$h[electronic resource]
260 $c2018
500 $aTítulo em português: Tamanho e função sistólica atrial esquerda em cães sadios e com doença valvar crônica de mitral.
520 $aIn humans, left atrial enlargement and reduced contractile functions are associated with adverse cardiovascular events and a poor prognosis in many dilatation of the left atrium occurs with the gradual evolution of chronic mitral valve disease and is well diseases. The left atrium is the most compromised cardiac chamber in dogs with chronic mitral valve disease (CMVD). Therefore, this study aimed to compare the main parameters of left atrial enlargement (left atrium/aorta ratio, left atrial diameter and volume indices) and contractile function (transmitral flow peak velocity A wave and time velocity integral, atrial fraction, and atrial ejection force) at different stages of valve disease, and correlate the left atrial diameter, volume, and contractile function indices with echocardiographic variables predictive of heart failure in dogs (transmitral flow peak velocity E wave, E wave/IVRT ratio, E wave/E´wave ratio, and E wave/A wave ratio). The results showed that progressive characterized by the left atrium/aorta ratio and left atrium volume index. The left atrial diameter and volume indices and left atrium/aorta ratio correlated positively with the transmitral flow peak velocity E wave and E wave/IVRT ratio, which are important indices of diastolic function. The left atrial contractile function indices increased as CMVD evolved. Except for the atrial fraction, the left atrial contractile function indices correlated with the left ventricular filling pressure indices.
650 $aDogs
650 $aHeart
653 $aChronic mitral valve disease
653 $aLeft atrial contractile function
653 $aLeft atrial size
653 $aLeft ventricular filling pressure
700 1 $aCASTRO, J. R.
700 1 $aMANTOVANI, M. M.
700 1 $aGIMENES, A. M.
700 1 $aDUARTE, C. N.
700 1 $aGOLDFEDER, G. T.
700 1 $aSCHWARTZ, D. S.
700 1 $aLARSSON, M. H. M. A.
773 $tPesquisa Veterinária Brasileira, Brasília, DF$gv. 38, n 8, p. 1678-5150, agosto 2018
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Embrapa Unidades Centrais (AI-SEDE) |
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