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. 2020 Jun 24;11:821. doi: 10.3389/fpls.2020.00821

FIGURE 3.

FIGURE 3

The average spectra of samples. (A) the original terahertz absorption spectra; (B) the extracted and preprocessed terahertz absorption spectra; (C) the original near-infrared hyperspectral spectra; (D) the extracted and preprocessed near-infrared hyperspectral spectra.