Application of Up-Sampling and Resolution Scaling to Fresnel Reconstruction of Digital Holograms
Fresnel transform implementation methods using numerical preprocessing techniques are investigated in this paper. First, it is shown that up-sampling dramatically reduces the minimum reconstruction distance requirements and allows maximal signal recovery by eliminating aliasing artifacts which typically occur at distances much less than the Rayleigh range of the object. Second, zero-padding is employed to arbitrarily scale numerical resolution for the purpose of resolution matching multiple holograms, where each hologram is recorded using dissimilar geometric or illumination parameters. Such preprocessing yields numerical resolution scaling at any distance. Both techniques are extensively illustrated using experimental results.
Copyright © 2015, Optical Society of America
Optical Society of America
Williams, Logan; Nehmetallah, George; Aylo, Rola; and Banerjee, Partha P., "Application of Up-Sampling and Resolution Scaling to Fresnel Reconstruction of Digital Holograms" (2015). Electrical and Computer Engineering Faculty Publications. 235.