27 September 2016 Compressed digital holography: from micro towards macro
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Abstract
signal processing methods from software-driven computer engineering and applied mathematics. The compressed sensing theory in particular established a practical framework for reconstructing the scene content using few linear combinations of complex measurements and a sparse prior for regularizing the solution. Compressed sensing found direct applications in digital holography for microscopy. Indeed, the wave propagation phenomenon in free space mixes in a natural way the spatial distribution of point sources from the 3-dimensional scene. As the 3-dimensional scene is mapped to a 2-dimensional hologram, the hologram samples form a compressed representation of the scene as well. This overview paper discusses contributions in the field of compressed digital holography at the micro scale. Then, an outreach on future extensions towards the real-size macro scale is discussed. Thanks to advances in sensor technologies, increasing computing power and the recent improvements in sparse digital signal processing, holographic modalities are on the verge of practical high-quality visualization at a macroscopic scale where much higher resolution holograms must be acquired and processed on the computer.
Conference Presentation
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Colas Schretter, Stijn Bettens, David Blinder, Béatrice Pesquet-Popescu, Marco Cagnazzo, Frédéric Dufaux, Peter Schelkens, "Compressed digital holography: from micro towards macro", Proc. SPIE 9971, Applications of Digital Image Processing XXXIX, 99710V (27 September 2016); doi: 10.1117/12.2238761; https://doi.org/10.1117/12.2238761
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