Fig. 1. Principle diagram of depth reconstruction algorithm

Fig. 2. Calculation principle of depth reconstruction method

Fig. 3. Focus and defocus of reconstruction images

Fig. 4. (a) Underwater target imaging and processing flow based on computational integral imaging; (b) variation in value of SMD function with reconstruction depth

Fig. 5. Record system. (a) CCD scanning system; (b) scanning path

Fig. 6. Schematic of experimental scenes

Fig. 7. Recorded images. (a) EIA; (b) elemental image (first row, first column); (c) elemental image (fifth row, fifth column)

Fig. 8. Values of SMD function at depth ranges of (a) 275-290 mm, (b) 345-360 mm and (c) 390-410 mm; (d)-(f) enlarge images of dashed line part in Figs. 8(a)-(c)

Fig. 9. Reconstruction images at different depths. (a) z=282.0 mm; (b) z=345.2 mm; (c) z=408.8 mm