Fig. 1. Schematic diagram of the H-DSPI system.

Fig. 2. TCSPC is employed to record the time interval between consecutive laser pulses and photon events. (a) Time distribution of the photon events. (b) Histogram of the photon arrival times.

Fig. 3. Process of image measurement and reconstruction.

Fig. 4. Experimental setup of the H-DSPI system.

Fig. 5. Measured spectrum for the first modulation pattern.

Fig. 6. Reconstructed pseudo-color images for different spectral bands.

Fig. 7. Spectral images for different sampling ratios. The sampling ratios are (a) 100%, (b) 50%, and (c) 25%, respectively.

Fig. 8. Intensity distribution for the first modulation pattern and reconstruction of the objects at different depths. (a) Photon count versus TOF/distance for the first modulation pattern; (b) reconstructed image at distance d₁; and (c) reconstructed image at distance d₂.

Fig. 9. Depth and x–y projection images for different sampling ratios. (a)–(c) x–y projection images restored for sampling ratios of 100%, 50%, and 25%; (d)–(f) depth images restored for sampling ratios of 100%, 50%, and 25%.

Fig. 10. Hyperspectral-depth images for sampling ratios of (a) 100%, (b) 50%, and (c) 25%.