Abstract

Holographic stereogram (HS) printing requires extensive memory capacity and long computation time during perspective acquisition and implementation of the pixel re-arrangement algorithm. Hogels contain very weak depth information of the object. We propose a HS printing system that uses simplified digital content generation based on the inverse-directed propagation (IDP) algorithm for hogel generation. Specifically, the IDP algorithm generates an array of hogels using a simple process that acquires the full three-dimensional (3D) information of the object, including parallax, depth, color, and shading, via a computer-generated integral imaging technique. This technique requires a short computation time and is capable of accounting for occlusion and accommodation effects of the object points via the IDP algorithm. Parallel computing is utilized to produce a high-resolution hologram based on the properties of independent hogels. To demonstrate the proposed approach, optical experiments are conducted in which the natural 3D visualizations of real and virtual objects are printed on holographic material. Experimental results demonstrate the simplified computation involved in content generation using the proposed IDP-based HS printing system and the improved image quality of the holograms.

© 2021 Optical Society of America

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References

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Supplementary Material (3)

NameDescription
Visualization 1       The reconstruction of the printed HS of a virtual 3D object (“3D OIP”) from the different viewpoints is shown in Visualization 1.
Visualization 2       The reconstruction of the printed HS of a virtual 3D object (“M. Pjanic sphere”) from the different viewpoints is shown in Visualization 2.
Visualization 3       The reconstruction of the printed HS of a real 3D object (“Venus”) from the different viewpoints is shown in Visualization 3.

Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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