Detection of internal mold infection in tomato by transmittance near infrared spectroscopy

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dc.contributor.authorJannok, P.
dc.contributor.authorPetcharaporn, K.
dc.contributor.authorTeerachaichayut, S.
dc.date.accessioned2026-08-06T10:10:04Z
dc.date.available2026-08-06T10:10:04Z
dc.date.issued2014-10-20
dc.description.abstractAlternaria alternata is the black mold occurring inside tomato. This defect can be normally found by destructive method but it cannot be detected by visible inspection from outside appearance of intact tomato. Therefore, a non-destructive technique for prediction of internal mold infection in tomato is required. Near infrared (NIR) spectroscopy technique was considered in this research. Transmittance NIR spectra in the range of 665-955 nm of tomato were acquired. Partial least squares-discriminant analysis (PLS-DA) was performed to establish the calibration model. Results indicated that combination of the standard normal variate transformation (SNV) and smoothing (Savitzky-Golay) pretreatment appeared the best method to develop the model. The calibration model was crossvalidated by a training set (N=140) and used for prediction by a test set (N=60). It obtained 85.0% (corrected 88.7% in normal samples and corrected 81.2% in defected samples) and 91.7% (corrected 100% in normal samples and corrected 83.9% in defected samples) of the total accuracy for calibration and prediction, respectively. Moreover, defected samples were classified in 3 levels of infection severity. The accuracies of cross validation for groups of low, medium and high infection severity were investigated and obtained 82.2, 82.4 and 90.0%, respectively. In conclusion, the calibration model from transmittance NIRS technique can be applied for rapid and non-destructive sorting of internal mold infection in intact tomato.
dc.identifier.citationActa Horticulturae, 1053, 93-100, 2014
dc.identifier.doi10.17660/actahortic.2014.1053.7
dc.identifier.issn05677572
dc.identifier.other2-s2.0-84908620300
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/5842
dc.sourceActa Horticulturae
dc.subjectCalibration
dc.subjectMeasurement
dc.subjectNon-destructive
dc.subjectPrediction
dc.subjectPretreatment
dc.titleDetection of internal mold infection in tomato by transmittance near infrared spectroscopy
dc.typeConference Paper

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