McElhinney, Conor P. and Hennelly, Bryan M. and Naughton, Thomas J. (2008) Extended focused imaging for digital holograms of macroscopic three-dimensional objects. Applied Optics, 47 (19). D71-D79. ISSN 0003-6935

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Abstract

When a digital hologram is reconstructed, only points located at the reconstruction distance are in focus. We have developed a novel technique for creating an in-focus image of the macroscopic objects encoded in a digital hologram. This extended focused image is created by combining numerical reconstructions with depth information extracted by using our depth-from-focus algorithm. To our knowledge, this is the first technique that creates extended focused images of digital holograms encoding macroscopic objects. We present results for digital holograms containing low- and high-contrast macroscopic objects.

Item Type:	Article
Additional Information:	The definitive version of this article is available at http://dx.doi.org/10.1364/AO.47.000D71 © 2008 Optical Society of America. This publication has emanated from research conducted with the financial support of Science Foundation Ireland, Enterprise Ireland, the Embark Initiative of the Irish Research Council for Science, Engineering, and Technology, and the European Commission through a Marie Curie Fellowship. LEGO is a trademark of the LEGO Group of companies. LEGO did not sponsor, authorize, or endorse this research.
Keywords:	Extended focused imaging; digital holograms; macroscopic three-dimensional objects; depth-from-focus algorithm;
Academic Unit:	Faculty of Science and Engineering > Computer Science Faculty of Science and Engineering > Electronic Engineering
Item ID:	5770
Depositing User:	Dr. Bryan Hennelly
Date Deposited:	04 Feb 2015 15:58
Journal or Publication Title:	Applied Optics
Publisher:	Optical Society of America
Refereed:	Yes
Funders:	Science Foundation Ireland (SFI), Enterprise Ireland (EI), Irish Research Council for Science Engineering and Technology (IRCSET), European Commission (Marie Curie Fellowship)
URI:
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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