Fig. 14.

PhlatCam has depth dependent PSF that magnifies as the scene gets closer. The magnification falls with inverse depth relation. By looking at the correlation of PSFs, we can broadly categorize scene depth into 3 regimes. At close distances, the correlation falls quickly, enabling us to reconstruct 3D images. At the medium distances, the correlation falls gradually over a wider depth range. In this distance range, we can perform computational refocusing. At much larger depth, the dependence of PSF with depth saturates and all far scene points can be said to be beyond the hyperfocal distance of PhlatCam, thereby allowing only reconstruction of 2D images.