Tilted objects EFI extracted at once by 3D output of the angular spectrum method

Year: 2013

Authors: Matrecano M., Paturzo M., Ferraro P.

Autors Affiliation: CNR—Istituto Nazionale di Ottica Applicata, Via Campi Flegrei 34, 80078 Pozzuoli(NA),Italy

Abstract: Since many optical imaging systems suffer from a limited depth of focus, three-dimensional (3D) objects, or even flat objects tilted with respect to the optical axis, are imaged with only a portion of them in focus. Typically, to overcome this problem, in-focus areas are extracted from different images taken at different depths. The in-focus regions are thus merged together to build the extended focus image (EFI). In this work, we propose a quasi-automatic method for the EFI construction of tilted objects, extracted at once by 3D output of the Angular Spectrum Method (ASM) from a single digitally recorded hologram. Results show that our method can be effectively used for the correction of the anamorphism due to the reconstruction on a tilted plane with respect to the hologram one. (C) 2013 Elsevier Ltd. All rights reserved.


Volume: 51 (12)      Pages from: 1353  to: 1359

More Information: The research leading to these results has received funding from the Italian \”Ministero dell\’Istruzione e della Ricerca\”, within the Project: \”PONO2876-TASMA Tecnologie Abilitanti per Sistemi di Monitoraggio Aeroportuale\”.
KeyWords: digital holography; 3D reconstruction; angular spectrum method; EFI; tamura index
DOI: 10.1016/j.optlaseng.2013.05.008

Citations: 2
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