Fast computer-generated hologram computation using rendered depth map image

Seyedmahdi Kazempourradi; Erdem Ulusoy; Hakan Urey

doi:10.1117/12.2252374

6 April 2017 Fast computer-generated hologram computation using rendered depth map image

Seyedmahdi Kazempourradi, Erdem Ulusoy, Hakan Urey

Proceedings Volume 10127, Practical Holography XXXI: Materials and Applications; 101270Q (2017) https://doi.org/10.1117/12.2252374
Event: SPIE OPTO, 2017, San Francisco, California, United States

Abstract

We propose a method for computing realistic computer-generated holograms (CGHs) of three-dimensional (3D) objects, where we benefit from well-established graphical processing units (GPUs) and computer graphics techniques to handle occlusion, shading and parallax effects. The graphics render provides a 2D perspective image including occlusion and shading effects. We also extract the depth map data of the scene. The intensity values and 3D positions of object points are extracted by combining the rendered intensity image and the depth map (Z-buffer) image. We divide the depth range into several planes and quantize the depth value of 3D image points to the nearest plane. In the CGH computation part, we perform proper Fresnel transformations of these planar objects and sum them up to create the hologram corresponding to the particular viewpoint. We then repeat the entire procedure for all possible viewpoints and cover the hologram area. The experimental results show that the technique is capable of performing high quality reconstructions in a fast manner.

Conference Presentation

Citation Download Citation

Seyedmahdi Kazempourradi, Erdem Ulusoy, and Hakan Urey "Fast computer-generated hologram computation using rendered depth map image", Proc. SPIE 10127, Practical Holography XXXI: Materials and Applications, 101270Q (6 April 2017); https://doi.org/10.1117/12.2252374

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