Wide viewing angle composite light field display technique

To address the viewing angle limitations of traditional compressive light field (LF) display techniques, a composite LF display technique that combines compressive LF and integral imaging (II) display techniques was proposed. The technique first utilizes a partitioned display structure to construct multiple sub-viewing angles and uses compressive LFs within each sub-viewing angle to get continuous disparity. Then, it uses a large-aperture II system to concatenate the various sub-viewing angles to get a composite LF display with a large viewing angle. A partitioned decomposition algorithm using perspective correlation was designed for the composite LF display, significantly reducing the number of iterations. Meanwhile, the non-negative matrix factorization (NMF) algorithm using the Nesterov accelerated gradient (NAG) solver was designed to increase the decomposition efficiency further. A rendering pipeline from 3D model data to composite LF was built using a GPU. For a composite LF with 15×27 viewpoints and a resolution of 2439 × 1355 × 2, only 2-3 iterations are needed to approach the optimal solution. The decomposition rate is 8.94 times faster than the traditional NMF algorithm. A composite LF display system with a viewing angle of horizontal 43.6° and vertical 22.6° respectively, was built, verifying the feasibility of the technology.