The near infrared spectrogram of human hair wigs and animal hair wigs was measured with a Fourier near infrared spectrometer. In addition, a qualitative model for the identification of human hair wigs and animal hair wigs with their near infrared spectrogram has been established. The effectiveness of spectral preprocessing with chemometric techniques including standard normal variable, second derivative and Norris smoothing has been analyzed through principal component analysis. The results showed that the accuracy of the discriminant model could reach 100%, indicating that the near infrared spectroscopy method is highly applicable and effective for the identification of human hair wigs and animal hair wigs.
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