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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agricultura Digital. Para informações adicionais entre em contato com cnptia.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Agricultura Digital. |
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Data corrente: |
05/08/2008 |
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Data da última atualização: |
07/03/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MEYER, G. E.; CAMARGO NETO, J. |
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Afiliação: |
GEORGE E. MEYER, University of Nebraska; JOAO CAMARGO NETO, CNPTIA. |
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Título: |
Verification of color vegetation indices for automated crop imaging applications. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Computers and Electronics in Agriculture, v. 63, n. 2, p. 282-293, Oct. 2008. |
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DOI: |
10.1016/j.compag.2008.03.009 |
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Idioma: |
Inglês |
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Conteúdo: |
An accurate vegetation index is required to identify plant biomass versus soil and residue backgrounds for automated remote sensing and machine vision applications, plant ecological assessments, precision crop management, and weed control. An improved vegetation index, Excess Green minus Excess red (ExG - ExR) was compared to the commonly used Excess Green (ExG), and the normalized difference (NDI) indices. The latter two indices used an Otsu threshold value to convert the index near-binary a full binary image. The indices were tested with digital color image sets of single plants grown and taken in a greenhouse and field images of young soybean plants. Vegetative index accuracies using a separation quality factor algorithm were compared to hand-extracted plant region of interest. A quality factor of one represented a near perfect binary match of the computer extratect plant target compared to the hand-extracted plant region. The ExG - ExR index had the highest quality factor of 0.88 + 0.12 for all three weeks and soil-residue backgrouds for the greenhouse set. The ExG + Otsu and NDI - Otsu indices had similar but lower quality factors of 0.53 +_ 0.39 and 0.54 +_ 0.33 for the same sets, respectively. Field images of young soybeans against bare soil gave quality factors for bothExG - ExR and ExG + Otsu around 0.88 +_ 0.07. The quality factor of NDI + Otsu using the same field images was 0.25 +_ 0.08. The ExG - ExR index has a fixed, built-in zero threshold, so it does not need Otsu or any user select threshold value. The ExG - ExR index worked especially well for flesh wheat straw backgrounds, where it was generally 55% more accurate than the ExG + Otsu and NDI+ Otsu indices. Once a binary plant region of interest is identifield with a vegetation index, other advance image processing operations may be applied, such as identification of plant species for strategic weed control. MenosAn accurate vegetation index is required to identify plant biomass versus soil and residue backgrounds for automated remote sensing and machine vision applications, plant ecological assessments, precision crop management, and weed control. An improved vegetation index, Excess Green minus Excess red (ExG - ExR) was compared to the commonly used Excess Green (ExG), and the normalized difference (NDI) indices. The latter two indices used an Otsu threshold value to convert the index near-binary a full binary image. The indices were tested with digital color image sets of single plants grown and taken in a greenhouse and field images of young soybean plants. Vegetative index accuracies using a separation quality factor algorithm were compared to hand-extracted plant region of interest. A quality factor of one represented a near perfect binary match of the computer extratect plant target compared to the hand-extracted plant region. The ExG - ExR index had the highest quality factor of 0.88 + 0.12 for all three weeks and soil-residue backgrouds for the greenhouse set. The ExG + Otsu and NDI - Otsu indices had similar but lower quality factors of 0.53 +_ 0.39 and 0.54 +_ 0.33 for the same sets, respectively. Field images of young soybeans against bare soil gave quality factors for bothExG - ExR and ExG + Otsu around 0.88 +_ 0.07. The quality factor of NDI + Otsu using the same field images was 0.25 +_ 0.08. The ExG - ExR index has a fixed, built-in zero threshold, so it does not nee... Mostrar Tudo |
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Palavras-Chave: |
Color images; Índice de vegetação; Machine vision; Plant; Residue; Resíduos; Soils. |
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Thesagro: |
Planta; Solo. |
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Thesaurus Nal: |
Computer vision; Vegetation index. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02697naa a2200277 a 4500
001 1006684
005 2023-03-07
008 2008 bl uuuu u00u1 u #d
024 7 $a10.1016/j.compag.2008.03.009$2DOI
100 1 $aMEYER, G. E.
245 $aVerification of color vegetation indices for automated crop imaging applications.$h[electronic resource]
260 $c2008
520 $aAn accurate vegetation index is required to identify plant biomass versus soil and residue backgrounds for automated remote sensing and machine vision applications, plant ecological assessments, precision crop management, and weed control. An improved vegetation index, Excess Green minus Excess red (ExG - ExR) was compared to the commonly used Excess Green (ExG), and the normalized difference (NDI) indices. The latter two indices used an Otsu threshold value to convert the index near-binary a full binary image. The indices were tested with digital color image sets of single plants grown and taken in a greenhouse and field images of young soybean plants. Vegetative index accuracies using a separation quality factor algorithm were compared to hand-extracted plant region of interest. A quality factor of one represented a near perfect binary match of the computer extratect plant target compared to the hand-extracted plant region. The ExG - ExR index had the highest quality factor of 0.88 + 0.12 for all three weeks and soil-residue backgrouds for the greenhouse set. The ExG + Otsu and NDI - Otsu indices had similar but lower quality factors of 0.53 +_ 0.39 and 0.54 +_ 0.33 for the same sets, respectively. Field images of young soybeans against bare soil gave quality factors for bothExG - ExR and ExG + Otsu around 0.88 +_ 0.07. The quality factor of NDI + Otsu using the same field images was 0.25 +_ 0.08. The ExG - ExR index has a fixed, built-in zero threshold, so it does not need Otsu or any user select threshold value. The ExG - ExR index worked especially well for flesh wheat straw backgrounds, where it was generally 55% more accurate than the ExG + Otsu and NDI+ Otsu indices. Once a binary plant region of interest is identifield with a vegetation index, other advance image processing operations may be applied, such as identification of plant species for strategic weed control.
650 $aComputer vision
650 $aVegetation index
650 $aPlanta
650 $aSolo
653 $aColor images
653 $aÍndice de vegetação
653 $aMachine vision
653 $aPlant
653 $aResidue
653 $aResíduos
653 $aSoils
700 1 $aCAMARGO NETO, J.
773 $tComputers and Electronics in Agriculture$gv. 63, n. 2, p. 282-293, Oct. 2008.
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Registro original: |
Embrapa Agricultura Digital (CNPTIA) |
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| Registros recuperados : 25 | |
| 4. |  | CIOTTA, M. N.; PASA M. da S.; NAVA, G. Instalação do pomar. CIOTTA, M. N.; ARIOLI, C. J.; PINTO, F. A. M. F.; SANTOS, K. L. dos; ARAÚJO, L.; PASA, M. da S. A cultura da goiabeira-serrana. Florianópolis: Epagri, 2018. 216 p. p. 89-98| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 5. | | GIOVANAZ, M. A.; BARTZ, J.; PASA, M. da S.; CHAVES, F. C.; FACHINELO, J. C. Abscisic acid as a potential chemical thinner for peach. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 50, n. 10, p. 989-992, out. 2015. Notas científicas. Título em português: Ácido abscísico como potencial raleante químico de frutos de pessegueiro.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 8. | | BRIGHENTI, A. F.; WURZ, D. A.; PASA, M. da S.; RUFATO, L. Plant growth regulators to enhance fruit color of 'Gala' apples. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 52, n. 11, p. 1118-1122, nov. 2017. Notas Científicas. Título em português: Fitorreguladores para o aumento da coloração de maçãs 'Gala'.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 9. | | PASA, M. da S.; FELIPPETO, J.; NAVA, G.; SILVA, C. P. da. Performance of 'Fuji Suprema' apple trees treated with budbreak promoters, in São Joaquim-SC. Revista Brasileira de Fruticultura, Jaboticabal, 2018, v. 40, n. 1, 1-10, 2018.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 12. | | PASA, M. da S.; KATSURAYAMA, J. M.; BRIGHENTI, A. F.; ARAÚJO FILHO, J. V. de; BONETI, J. I. da S. Desempenho de macieiras 'Imperial Gala' e 'Mishima Fuji' em diferentes porta-enxertos. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 51, n. 1, p. 17-26, jan. 2016. Título em inglês: Performance of 'Imperial Gala' and 'Mishima Fuji' apples on different rootstocks.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 13. | | PASA, M. da S.; FACHINELLO, J. C.; SCHMITZ, J. D.; SOUZA, A. L. K. de; HERTER, F. G. Hábito de frutificação e produção de pereiras sobre diferentes porta-enxertos. Pesquisa agropecuária Brasileira, Brasília, DF, v. 46, n. 9, p. 998-1005, set. 2011 Título em inglês: Bearing habit and production of pears grafted onto different rootstocks.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 15. | | PASA, M. da S.; FELIPPETO, J.; NAVA, G.; SILVA, C. P. da; BRIGHENTI, A. F.; CIOTTA, M. N. Performance of 'Maxi Gala' apple trees as affected by budbreak promoters, in São Joaquim-SC. Revista Brasileira de Fruticultura, v. 40, n. 1, p. 1-10, 2018.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 17. | | SOUZA, A. L. K. de; SCHUCH, M. W.; PASA, M. da S.; SCHMITZ, J. D.; CARRA, B.; CAMARGO, S. S.; ANTUNES, L. E. C. Desenvolvimento inicial de mirtileiros obtidos por micropropagação e estaquia em duas situações de plantio. In: CONGRESSO BRASILEIRO DE FRUTICULTURA, 21., 2010, Natal. Frutas: saúde, inovação e responsabilidade: anais. Natal: Sociedade Brasileira de Fruticultura, 2010. 1 CD-ROM. Resumo expandido.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 18. | | PICOLOTTO, L.; MANICA-BERTO, R.; PAZIN, D.; PASA, M. da S.; SCHMITZ, J. D.; PREZOTTO, M. E.; BETEMPS, D.; BIANCHI, V. J.; FACHINELLO, J. C. Características vegetativas, fenológicas e produtivas do pessegueiro cultivar Chimarrita enxertado em diferentes porta-enxertos. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 44, n. 6, p. 583-589, jun. 2009. Título em inglês: Productivity and physicochemical composition of berries of grapevine cultivars grafted onto different rootstocks.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 19. | | SOUZA, A. L. K. de; SCHMITZ, J. D.; PASA, M. da S.; CARRA, B.; CAMARGO, S. S.; SCHUCH, M. W.; ANTUNES, L. E. C. Micropropagação x estaquia: desempenho a campo de mudas de mirtileiro. In: CONGRESSO BRASILEIRO DE FRUTICULTURA, 21., 2010, Natal. Frutas: saúde, inovação e responsabilidade: anais. Natal: Sociedade Brasileira de Fruticultura, 2010. 1 CD-ROM. Resumo expandido.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 20. | | SOUZA, Z. da S.; PASA, M. da S.; OLIVEIRA, P. R. D. de; FIORAVANÇO, J. C.; ARAÚJO, L.; PINTO, F. A. M. F. Avaliação de cultivares de pereiras europeias para a região de São Joaquim, SC. In: SIMPÓSIO DE FRUTICULTURA DA REGIÃO SUL, 1., 2017. Anais.....Chapecó, SC: FRUSUL, 28 a 29 jun. 2017.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Uva e Vinho. |
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| Registros recuperados : 25 | |
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