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Proceedings Paper

Computer-generated holograms considering multiple reflection, transmission, and shadow on object surfaces
Author(s): Kazuya Ezura; Yuji Sakamoto; Yoshinao Aoki
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Paper Abstract

We present a computational method for image reconstruction with a high degree of reality from a computergenerated hologram (CGH). As also seen in the field of computer-graphics, rendering methods are indispensable techniques for displaying realistic 3D images from CGH. The proposed rendering algorithm takes into account multiple reflection, transmission and shadow of lights among objects. Objects are expressed using the patch model in this method. In the object-light calculation stage, reflection, transmission and shadow of incident light are calculated on each patch. Propagations of these three lights to every other patch and a hologram are then calculated. The incident light of a patch is the summation of these lights propagated from other patches and illumination light, which lights up all the objects. Object-light on a hologram is sought from the summation of all of the lights from each patch. In addition, we fabricate full-parallax CGHfs of 3D object models using this method, and the reconstructed 3D holographic images are shown for demonstration purposes.

Paper Details

Date Published: 29 June 2004
PDF: 8 pages
Proc. SPIE 5290, Practical Holography XVIII: Materials and Applications, (29 June 2004); doi: 10.1117/12.526443
Show Author Affiliations
Kazuya Ezura, Hokkaido Univ. (Japan)
Yuji Sakamoto, Hokkaido Univ. (Japan)
Yoshinao Aoki, Hokkaido Univ. (Japan)

Published in SPIE Proceedings Vol. 5290:
Practical Holography XVIII: Materials and Applications
Tung H. Jeong; Hans I. Bjelkhagen, Editor(s)

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