title: Extended focused imaging for digital holograms of macroscopic three-dimensional objects.
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.
authors.affiliation: Department of Computer Science, National University of Ireland, Maynooth, County Kildare, Ireland. conormce@cs.nuim.ie
authors.forename: Conor P
authors.initials: CP
authors.lastname: McElhinney
authors.forename: Bryan M
authors.initials: BM
authors.lastname: Hennelly
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Naughton