Hyperspectral Imaging for Evaluating Impact Damage to Mango According to Changes in Quality Attributes

Evaluation of impact damage to mango (<i>Mangifera indica</i> Linn) as a result of dropping from three different heights, namely, 0.5, 1.0 and 1.5 m, was conducted by hyperspectral imaging (HSI). Reflectance spectra in the 900&#8315;1700 nm region were used to develop prediction mode...

Full description

Bibliographic Details
Main Authors: Duohua Xu, Huaiwen Wang, Hongwei Ji, Xiaochuan Zhang, Yanan Wang, Zhe Zhang, Hongfei Zheng
Format: Article
Language:English
Published: MDPI AG 2018-11-01
Series:Sensors
Subjects:
Online Access:https://www.mdpi.com/1424-8220/18/11/3920
Description
Summary:Evaluation of impact damage to mango (<i>Mangifera indica</i> Linn) as a result of dropping from three different heights, namely, 0.5, 1.0 and 1.5 m, was conducted by hyperspectral imaging (HSI). Reflectance spectra in the 900&#8315;1700 nm region were used to develop prediction models for pulp firmness (PF), total soluble solids (TSS), titratable acidity (TA) and chroma (∆b*) by a partial least squares (PLS) regression algorithm. The results showed that the changes in the mangoes&#8217; quality attributes, which were also reflected in the spectra, had a strong relationship with dropping height. The best predictive performance measured by coefficient of determination (<i>R</i><sup>2</sup>) and root mean square errors of prediction (RMSEP) values were: 0.84 and 31.6 g for PF, 0.9 and 0.49 <sup>o</sup>Brix for TSS, 0.65 and 0.1% for TA, 0.94 and 0.96 for chroma, respectively. Classification of the degree of impact damage to mango achieved an accuracy of more than 77.8% according to ripening index (RPI). The results show the potential of HSI to evaluate impact damage to mango by combining with changes in quality attributes.
ISSN:1424-8220