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Optical Engineering

Object reconstruction from in-line Fresnel holograms without explicit depth focusing
Author(s): Mehmet Tankut Özgen; Temel Engin Tuncer
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Paper Abstract

We propose two computational techniques for extracting object cross-sectional shape information from digitized in-line Fresnel holograms that do not require prior knowledge of object depths but recover relative depth information along the way. The first algorithm is applicable to hologram segments involving a single particle only. It is based on estimating Fourier transform magnitude and phase of the particle from those of the hologram segment. The second algorithm conducts a joint inverse filtering and depth search procedure so as to minimize (or maximize) a binariness (or a concentration) criterion defined over the output object function. It is applicable to multiple-particle, multiexposure holograms as well. The proposed techniques are illustrated on synthesized holograms and their practical limitations are discussed.

Paper Details

Date Published: 1 June 2004
PDF: 11 pages
Opt. Eng. 43(6) doi: 10.1117/1.1737785
Published in: Optical Engineering Volume 43, Issue 6
Show Author Affiliations
Mehmet Tankut Özgen, Anadolu Univ. (Turkey)
Temel Engin Tuncer, Middle East Technical Univ. (Turkey)


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