Fig. 1. Hyperspectral image of the tomato

Fig. 2. Phase data acquisition system and bright field image and phase diagram of the tomato flesh cells. (a) Phase data acquisition system; (b) bright field image of the tomato flesh cells; (c) phase diagram of the tomato flesh cells

Fig. 3. Spectral curves of the tomato fruit. (a) Original spectra; (b) spectra after MSC preprocessing

Fig. 4. Screening of SPA characteristic bands

Fig. 5. CARS feature band screening. (a) The number of sampled variables; (b) RMSECV; (c) regression coefficient

Fig. 6. Regression curves of different sugar content prediction models. (a) MSC+CARS+PLS; (b) original+CARS+SVR

Fig. 7. Visualization of average sugar content of different tomatoes

Fig. 8. Phase imaging principle of monocyte model and phase shift distribution within the imaging plane. (a) Schematic diagram of phase imaging of monocyte model; (b) phase shift distribution of cells in the XOZ plane

Fig. 9. Phase peak and sample edge detection of tomato flesh cells. (a) Phase peak of a tomato flesh cell; (b) Canny operator detection for model cells; (c) Canny operator detection of tomato flesh cells

Fig. 10. Correlation between tomato sugar content and phase parameters. (a) Sugar content-phase envelope volume distribution; (b) sugar content-phase peak distribution

Fig. 11. Three-dimensional data cube of phase parameter - sugar content