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Proceedings Paper

An algorithm for the estimation of the in-focus distance for speckle holograms
Author(s): P. Memmolo; C. Distante; M. Paturzo; A. Finizio; P. Ferraro; B. Javidi
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Paper Abstract

Searching and recovering the correct reconstruction distance in digital holography can be a cumbersome and subjective procedure. Here we show an algorithm for the automatically estimating the in-focus image and recovering the correct reconstruction distance for speckle holograms. We have tested the approach in determining the reconstruction distances of stretched digital holograms. Stretching a hologram with a variable elongation parameter gives us the possibility to change the in-focus distance of the reconstructed image. In this way, the proposed algorithm can be verified at different distances by dispensing the recording of different holograms. Experimental results are shown with the aim to demonstrate the usefulness of the proposed method and a comparative analysis has been performed with respect to other existing algorithms developed for digital holography.

Paper Details

Date Published: 26 May 2011
PDF: 7 pages
Proc. SPIE 8082, Optical Measurement Systems for Industrial Inspection VII, 808209 (26 May 2011); doi: 10.1117/12.889534
Show Author Affiliations
P. Memmolo, Istituto Nazionale di Ottica, CNR (Italy)
Univ. degli Studi di Napoli Federico II (Italy)
C. Distante, Istituto Nazionale di Ottica, CNR (Italy)
M. Paturzo, Istituto Nazionale di Ottica, CNR (Italy)
A. Finizio, Istituto Nazionale di Ottica, CNR (Italy)
P. Ferraro, Istituto Nazionale di Ottica, CNR (Italy)
B. Javidi, Univ. of Connecticut (United States)


Published in SPIE Proceedings Vol. 8082:
Optical Measurement Systems for Industrial Inspection VII
Peter H. Lehmann; Wolfgang Osten; Kay Gastinger, Editor(s)

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