Figures (5)  Tables (0)

    • Figure 1. 

      Drying process analysis. (a) Hot air drying defects, high energy consumption and poor quality. (b) Drying quality under different drying strategies. (c) Drying rate curve, rate change at each stage[16]. (d) Water mass transfer process.

    • Figure 2. 

      The dielectric property detection drying process. (a) Common equipment for measuring dielectric properties. (b) Low moisture and low granularity agricultural products. (c) Principles of microwave drying.

    • Figure 3. 

      Detection of drying process by near infrared spectroscopy. (a) Relationship between near infrared spectroscopy and chemical bonds[36]. (b) Relationship between molecular bond vibration and wavelength. (c) Development of moisture monitoring model in drying process[40].

    • Figure 4. 

      Machine vision inspection of drying processes. (a) Analogy between the biological and computer vision systems[49]. (b) Drying process monitoring equipment based on computer vision[50]. (c) Image changes during potato drying[51]. (d) Visual model of the drying stage[52].

    • Figure 5. 

      Hyperspectral detection of drying process. (a) Hyperspectral monitoring equipmentr[73]. (b) Spectrum and spatial information of peanut samples obtained by the HSI technology[74]. (c) Original spectra and spectra pretreated with SNV[79]. (d) Moisture distribution of radish slices with drying time[75].