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Albertina Castro
Researcher at National Institute of Astrophysics, Optics and Electronics
Publications - 29
Citations - 1015
Albertina Castro is an academic researcher from National Institute of Astrophysics, Optics and Electronics. The author has contributed to research in topics: Digital holography & Depth of field. The author has an hindex of 10, co-authored 29 publications receiving 953 citations.
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Journal ArticleDOI
Resistance of the double random phase encryption against various attacks
TL;DR: A technique to recover the exact keys with only two known plain images is described, and this technique is compared to other attacks proposed in the literature.
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Reduction of speckle in digital holography by discrete Fourier filtering.
Jonathan Maycock,Bryan M. Hennelly,John McDonald,Yann Frauel,Albertina Castro,Bahram Javidi,Thomas J. Naughton +6 more
TL;DR: A digital signal processing technique that reduces the speckle content in reconstructed digital holograms based on sequential sampling of the discrete Fourier transform of the reconstructed image field is presented.
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Asymmetric phase masks for extended depth of field
TL;DR: A family of asymmetric phase masks is presented that extends the depth of field of an optical system and several modulation transfer functions with focus errors are computed and numerical simulations of the images achieved are reported.
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Integral imaging with large depth of field using an asymmetric phase mask.
TL;DR: It is shown that obtained elemental images are sharp over a larger range than with a regular lenslet array and further increase the quality of elemental images by a digital restauration.
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Comparison of passive ranging integral imaging and active imaging digital holography for three-dimensional object recognition
TL;DR: An overview of three-dimensional (3D) object recognition techniques that use active sensing by interferometric imaging (digital holography) and passive sensing by integral imaging is presented.