To establish a model based on near-infrared(NIR)spectra for quickly detecting the freshness of frozen crayfish,NIR spectra of thawed crayfish(tail,meat,and mince)were collected,and data were pretreated by first derivative,multiple scattering correction,wavelet transform(WT),or standard normal transform.The original and pretreated spectral data were correlated to total volatile basic nitrogen(TVB-N)contents using partial least squares(PLS)or convolutional neural network(CNN),and different quantitative prediction models were established and compared.The best model was selected to investigate its...
