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Proceedings Paper

Comparative analysis of super-resolution algorithms for digital holography
Author(s): Antonio Baldi
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Paper Abstract

Digital holography is an interferometric technique directly derived from its analog counterpart. In fact the only difference with classical holography lies in the recording medium, which in the case of the digital technique, is the charged-couple device (CCD) camera sensor. Though this solution does offer several advantages, such as simpler experimental procedure, ability to numerically modify the recorded data and new analysis algorithms, it does have some drawbacks. In fact, the numerical reconstruction relies on the theoretically determined wave front shape and the small number of lines of the camera sensor restricts the viewing angle to 2-4 degrees. However, by acquiring several, slightly shifted, low resolution holograms and combining them using super-resolution techniques, it is possible to construct a higher resolution digital hologram which allows a broader viewing angle. Several approaches to super-resolution imaging have been proposed, with different requirements in terms of memory, execution speed, sensitivity to displacement and acquisition errors, One important aspect of their application to digital holography is the identification of the best "working parameters". In this paper some reconstruction algorithms are compared in order to identify the most suitable super-resolution technique and its limitations.

Paper Details

Date Published: 15 September 2006
PDF: 6 pages
Proc. SPIE 6341, Speckle06: Speckles, From Grains to Flowers, 634114 (15 September 2006); doi: 10.1117/12.695354
Show Author Affiliations
Antonio Baldi, Univ. degli Studi di Cagliari (Italy)

Published in SPIE Proceedings Vol. 6341:
Speckle06: Speckles, From Grains to Flowers
Pierre Slangen; Christine Cerruti, Editor(s)

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