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Appl Opt. 2008 Jul 1;47(19):D71-9.

Extended focused imaging for digital holograms of macroscopic three-dimensional objects.

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  • 1Department of Computer Science, National University of Ireland, Maynooth, County Kildare, Ireland.


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.

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