Fig. 1. Geometric model of light field camera

Fig. 2. The relative coordinates are converted to absolute coordinates

Fig. 3. Representation of light on the plane of the image sensor, the plane of the micro lens array, and the plane of the main lens

Fig. 4. Light path in the light field camera model

Fig. 5. Sub-aperture image representation. (a) Sub-aperture image representation of one angle of a given viewpoint; (b) Original light field image; (c) Sub-aperture image of all angles

Fig. 6. Virtual camera center position

Fig. 7. Light rays from one point to two sub-aperture images at different angles

Fig. 8. Reprojection error model. (a) Conventional camera projection error; (b) Light field camera projection error

Fig. 9. Light field camera calibration experiment system

Fig. 10. Reprojection error of 30.0 mm calibration board checkerboard. (a) No nonlinear optimization and distortion correction; (b) Nonlinear optimization distortion correction; (c) The method of Dansereau nonlinear optimization and distortion correction