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Refocusing criterion via sparsity measurements in digital holography

  Articoli su Riviste JCR/ISI  (anno 2014)

Autori:  Memmolo P., Paturzo M., Javidi B., Netti P.A., Ferraro P

Affiliazione Autori:  Center for Advanced Biomaterials for Health Care@CRIB, Istituto Italiano di tecnologia, Largo Barsanti e Matteucci 53, 80125 Napoli, Italy; CNR-Istituto Nazionale di Ottica, via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy; ECE Department, University of Connecticut, U-157, Storrs, Connecticut 06269, USA ECE Department, University of Connecticut, U-157, Storrs, Connecticut 06269, USA.

Riassunto:  Several automatic approaches have been proposed in the past to compute the refocus distance in digital holography (DH). However most of them are based on a maximization or minimization of a suitable amplitude image contrast measure, regarded as a function of the reconstruction distance parameter. Here we show that, by using the sparsity measure coefficient regarded as a refocusing criterion in the holographic reconstruction, it is possible to recover the focus plane and, at the same time, establish the degree of sparsity of digital holograms, when samples of the diffraction Fresnel propagation integral are used as a sparse signal representation. We employ a sparsity measurement coefficient known as Gini

Rivista/Giornale:  OPTICS LETTERS
Volume n.:  39 (16)      Pagine da: 4719  a: 4722
Ulteriori informazioni:  We are very grateful to Dr. Andrea Finizio for acquiring the holograms of the mouse\'s cell and the astronaut puppet. This work was supported by Progetto Bandiera \"La Fabbrica del Futuro\" in the framework of the funded project \"Plastic lab-on-chips for the optical manipulation of single cells\" (PLUS).
DOI: 10.1364/OL.39.004719

*Impact Factor della Rivista: (2014) 3.292   *Citazioni: 50
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  26/05/2019

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