WU Long-guo,MA Ling,ZHANG Yao,TIAN Yu,ZHU Yan-zhe,ZHANG Yi-yang.Detection of Coated Cabbage Seeds Color Based on Hyperspectral Imaging Technology[J].Journal of Instrumental Analysis,2025,44(03):454-463.
WU Long-guo,MA Ling,ZHANG Yao,TIAN Yu,ZHU Yan-zhe,ZHANG Yi-yang.Detection of Coated Cabbage Seeds Color Based on Hyperspectral Imaging Technology[J].Journal of Instrumental Analysis,2025,44(03):454-463. DOI: 10.12452/j.fxcsxb.240711212.
Detection of Coated Cabbage Seeds Color Based on Hyperspectral Imaging Technology
Hyperspectral imaging technology was used to analyze the coating color uniformity and the depth of coating color of coated cabbage seeds of 4 different varieties and coated cabbage seeds treated with coating agents at 3 different concentrations during the coating process. The average spectral reflectance of 240 seed samples was extracted. The original spectra were preprocessed and optimized through 4 preprocessing methods. Then,4 methods including the competitive adaptive reweighted sampling algorithm(CARS),successive projections algorithm(SPA),uninformative variable elimination transformation method(UVE),and genetic algorithm partial least squares algorithm(GAPLS) were used to extract the characteristic wavelengths. Partial least squares regression(PLSR),multiple linear regression(MLR) and principal component regression(PCR) were established based on the optimized characteristic wavelengths. The results showed that the coating effect on kale seeds was the most obvious,followed by that on Jiaxiang taste-type cabbage,and the coating effects on Zhonggan 15 and purple cabbage were close. The Baseline method was preferably used to preprocess the chromaticity value
L
*,the Normalize method was used to preprocess the chromaticity value
a
,and the SNV method was used to preprocess the chromaticity value
b
. The characteristic wavelengths extracted by the GAPLS method were used to establish the quantitative prediction models for
L
* and
b
,the characteristic wavelengths extracted by the UVE method were used to establish the quantitative prediction model for the chromaticity value
a
. The
L
* model established by PLSR had the best effect(
R
c=0.814,
R
p=0.640;RMSEC=1.150,RMSEP=1.852),the model for the chromaticity value
a
established by MLR had a better effect(
R
c=0.981,
R
p=0.964;RMSEC=2.563,RMSEP=3.243),and the model for the chromaticity value
b
established by PCR had the best effect(
R
c=0.917,
R
p=0.913;RMSEC=2.552,RMSEP=2.589). The research can provide technical support for the online monitoring of seed chromaticity.
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