Fig. 1. Geometrical relation between a point object and its corresponding imaging points in the direct pickup method with a lens array.

Fig. 2. EIA captured from two alphabetical representations of “Dog” and “Cat,” and two plane objects of “Dog” and “Cat.”

Fig. 3. Depth resolution of capturing system used in the work; (a) overall depth resolution; (b)–(d) scaled graphs of the overall depth resolution.

Fig. 4. Spatial filtering used in the conventional method; (a) filtering area; (b) spatially filtered elemental images.

Fig. 5. Spatial filtering used in the proposed method; (a) filtering areas for alphabetical representations of “Dog” and plane object of “Dog;” (b) spatially filtered elemental images; (c) filtering areas for alphabetical representations of “Cat” and plane object of “Cat;” (d) spatially filtered elemental images.