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 using our depth-from-focus algorithm. To our knowledge, this is the first technique which creates extended focused images of digital holograms encoding macroscopic objects. We present results for digital holograms containing low- and high-contrast macroscopic objects.

Keywords: 090.0090 Holography, 090.1760 Computer holography, 100.6890 Three-dimensional image processing, 100.0100 Image processing, 100.2000 Digital image processing.

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