Speed up of Fresnel transforms for Digital holography using pre-computation
Pandey, Nitesh and Hennelly, Bryan M. and Kelly, Damien P. and Naughton, Thomas J. (2009) Speed up of Fresnel transforms for Digital holography using pre-computation. SPIE Proceedings, 7442 .
We show how the common Fresnel reconstruction of digital holograms can be speeded up on ordinary computers by precomputing the two chirp factors for a given detector array size and then calling these values from memory during the reconstruction. The speedup in time is shown for various hologram sizes. We also run the same algorithm on a Nvidia GPU using Matlab.
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