首页|Investigation into the biochemical properties of loquat fruits and their optical properties of hyperspectral imaging spectral correlation during the progression of postharvest fungal infection
Investigation into the biochemical properties of loquat fruits and their optical properties of hyperspectral imaging spectral correlation during the progression of postharvest fungal infection
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
Elsevier
In order to reveal the mechanism of hyperspectral imaging (HSI) for detecting of postharvest Colletotrichum siamense (C. siamense) infections of loquat fruits, this study measured the color parameters, hardness, tissue softening related substances (pectin, cellulose, enzyme activities), disease resistance compounds (total phenols, flavonoids, and lignin) with different disease degree, and analyzing their correlation with spectral reflectance. The results demonstrated that pathogen invasion altered enzyme activities, reduced hardness, and affected light absorption and reflection. Phenolic compounds caused browning, and the changes in the absorption coefficient corresponding to the spectral characteristic wavelengths of functional groups affected light absorption. Principal component analysis (PCA) identified characteristic wavelengths (520 nm, 595 nm, 620 nm, 680 nm, 701 nm in visible; 915 nm, 976 nm in near infrared) correlated with above quality parameters. HSI achieved high recognition rates for sound (96 %), incubation period (95.24 %), and obviously infected loquat fruits (98.41 %), proving its effectiveness for detecting C. siamense infections.
NETL
NSTL
Elsevier
