Method of real-time focus stacking by approximating the photographic formation integral as a discrete sum over planes in hypercube domains

摘要

Disclosed is a phase camera for real-time acquisition of the visual information of three-dimensional scenes. The phase camera is comprised of a converging lens (1), a lenslet array (2), a detecting surface (3) and parallel computing means. The lenslet array (2) is placed in a position of an image space of the converging lens (1) and forms an image on the detecting surface (3). The parallel computing means is adapted for calculating the focal stack associated with the object space measured by the camera by evaluating a photographic formation integral. This integral is evaluated by treating the photographic formation integral as a sum along lengths of planes in a 4d hypercube domain using a discretisation approximation.