Fast generation of complex modulation video holograms using temporal redundancy compression and hybrid point-source/wave-field approaches

Antonin Gilles; Patrick Gioia; Rémi Cozot; Luce Morin

doi:10.1117/12.2187045

22 September 2015 Fast generation of complex modulation video holograms using temporal redundancy compression and hybrid point-source/wave-field approaches

Antonin Gilles, Patrick Gioia, Rémi Cozot, Luce Morin

Author Affiliations +

Proceedings Volume 9599, Applications of Digital Image Processing XXXVIII; 95990J (2015) https://doi.org/10.1117/12.2187045
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

The hybrid point-source/wave-field method is a newly proposed approach for Computer-Generated Hologram (CGH) calculation, based on the slicing of the scene into several depth layers parallel to the hologram plane. The complex wave scattered by each depth layer is then computed using either a wave-field or a point-source approach according to a threshold criterion on the number of points within the layer. Finally, the complex waves scattered by all the depth layers are summed up in order to obtain the final CGH. Although outperforming both point-source and wave-field methods without producing any visible artifact, this approach has not yet been used for animated holograms, and the possible exploitation of temporal redundancies has not been studied. In this paper, we propose a fast computation of video holograms by taking into account those redundancies. Our algorithm consists of three steps. First, intensity and depth data of the current 3D video frame are extracted and compared with those of the previous frame in order to remove temporally redundant data. Then the CGH pattern for this compressed frame is generated using the hybrid point-source/wave-field approach. The resulting CGH pattern is finally transmitted to the video output and stored in the previous frame buffer. Experimental results reveal that our proposed method is able to produce video holograms at interactive rates without producing any visible artifact.

Citation Download Citation

Antonin Gilles, Patrick Gioia, Rémi Cozot, and Luce Morin "Fast generation of complex modulation video holograms using temporal redundancy compression and hybrid point-source/wave-field approaches", Proc. SPIE 9599, Applications of Digital Image Processing XXXVIII, 95990J (22 September 2015); https://doi.org/10.1117/12.2187045

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