Fig. 1. Structure of light field camera

Fig. 2. Rotation error between microlens array and sensor

Fig. 3. Tilt error between microlens array and sensor

Fig. 4. Calibration principle of structure parameters

Fig. 5. Calibration principle of tilt error

Fig. 6. Calibration device and results of structural parameters. (a) Experimental device; (b) calibration image without spacer; (c) calibration image with spacer

Fig. 7. Calibration of rotation error. (a) Calibration image; (b) linear fitting result of spot centroid

Fig. 8. Calibration of tilt error. (a) Calibration image of normal incidence; (b) calibration image with incident angle of 6°

Fig. 9. Process of light field reconstruction

Fig. 10. Light field acquisition and reconstruction. (a) Light field acquisition; (b)raw light field image; (c)reconstructed image of close view before calibration; (d)reconstructed image of distant view before calibration; (e)reconstructed image of close view after calibration; (f)reconstructed image of distant view after calibration

Table 1. Calibration results of structural parameters unit: mm