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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
06/09/2006 |
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Data da última atualização: |
06/09/2006 |
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Autoria: |
RABELO, G. F.; BRAGA JÚNIOR, R. A.; FABBRO, I. M. D.; TRIVI, M. R.; RABAL, H. J.; ARIZAGA, R. |
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Título: |
Laser speckle techniques in quality evaluation of orange fruits. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
Revista Brasileira de Engenharia Agrícola e Ambiental, Campina Grande, v. 9, n. 4, p. 570-575, out./dez. 2005. |
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ISSN: |
1415-4366 |
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Idioma: |
Inglês |
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Conteúdo: |
This work presents a study of a new technology applied in quality tests of oranges. Evaluations were performed using a nondestructive and noninvasive method based on the interpretation of an optical phenomenon that occurs when the fruit is illuminated with coherent light, referred as biospeckle. The speckle patterns of laser light scattered in orange fruits have been measured through their quantification. For the quantification of the variation by biospeckle, the autocorrelation function and the modified occurence matrix were used. From these functions, two parameters were obtained: the statistical cummulant and the moment of inertia, calculated from the modified occurrence matrix. These values were used as quality and senescence indicators for the specimens and were compared with other parameters, as total soluble solids, total acidity, the penetration force and the storage period. It was observed that the moment of inertia and statistical commulant decrease during the storage period. Since senescence is dependent on the storage period, it was possible to observe that the measure of the dynamic speckle varies for fruits as their quality decrease, and also the values change with the position where the images are taken. |
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Palavras-Chave: |
Biological material; Biospeckle; Senescence. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01911naa a2200229 a 4500
001 1653271
005 2006-09-06
008 2005 bl uuuu u00u1 u #d
022 $a1415-4366
100 1 $aRABELO, G. F.
245 $aLaser speckle techniques in quality evaluation of orange fruits.
260 $c2005
520 $aThis work presents a study of a new technology applied in quality tests of oranges. Evaluations were performed using a nondestructive and noninvasive method based on the interpretation of an optical phenomenon that occurs when the fruit is illuminated with coherent light, referred as biospeckle. The speckle patterns of laser light scattered in orange fruits have been measured through their quantification. For the quantification of the variation by biospeckle, the autocorrelation function and the modified occurence matrix were used. From these functions, two parameters were obtained: the statistical cummulant and the moment of inertia, calculated from the modified occurrence matrix. These values were used as quality and senescence indicators for the specimens and were compared with other parameters, as total soluble solids, total acidity, the penetration force and the storage period. It was observed that the moment of inertia and statistical commulant decrease during the storage period. Since senescence is dependent on the storage period, it was possible to observe that the measure of the dynamic speckle varies for fruits as their quality decrease, and also the values change with the position where the images are taken.
653 $aBiological material
653 $aBiospeckle
653 $aSenescence
700 1 $aBRAGA JÚNIOR, R. A.
700 1 $aFABBRO, I. M. D.
700 1 $aTRIVI, M. R.
700 1 $aRABAL, H. J.
700 1 $aARIZAGA, R.
773 $tRevista Brasileira de Engenharia Agrícola e Ambiental, Campina Grande$gv. 9, n. 4, p. 570-575, out./dez. 2005.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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