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We propose and demonstrate a viewing-angle-enhanced integral imaging display (VAEIID) system that uses a time-multiplexed, two-directional sequential projection (TTSP) scheme and a directional elemental image generation and resizing (DEIGR) algorithm. The main idea behind the method is sharing the same image screen to display two-directional elemental image (DEI) sets with a time-multiplexed sequential projection scheme. The proposed system consists of three processes: acquisition of depth and color information of a real object using the Microsoft Kinect sensor, generation of two DEI sets considering two different angular perspectives using a DEIGR algorithm, and projection of two sets of DEIs using the TTSP scheme. Due to the two-directional projections, each elemental lens of the lens array collects two-directional illuminations from the two sets of elemental images (EIs) projected in a time-multiplexed sequential manner by using the TTSP scheme; this produces two point light sources (PLSs) at different positions on the focal plane of the lens array. The positions of the PLSs are predefined and are determined in terms of projection angle. In this case, the viewing angle comprises the combination of two diverging ray bundles emerging from the two DEI sets projected from two angular directions. As a result, the viewing angle of the proposed VAEIID system is enhanced by almost twice that of the conventional method.

Viewing-Angle-Enhanced Integral Imaging Display System Using a Time-Multiplexed Two-Directional Sequential Projection Scheme and a DEIGR Algorithm