Open AccessIncreasing the storage density of a page-based holographic data storage system by image upscaling using the PSF of the Nyquist aperture
Author(s) -
Sang Hyuck Lee,
Sung Yong Lim,
Na-Kyeong Kim,
No Cheol Park,
Hyunseok Yang,
Kyoung Su Park,
Young Pil Park
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.012053
Subject(s) - point spread function , nyquist frequency , nyquist–shannon sampling theorem , image quality , optics , computer science , holographic data storage , aperture (computer memory) , spatial frequency , optical transfer function , computer data storage , image restoration , optical storage , bit error rate , holography , filter (signal processing) , nyquist rate , image processing , image (mathematics) , sampling (signal processing) , algorithm , computer vision , physics , acoustics , computer hardware , decoding methods
We introduce an image upscaling method that reduces bit errors caused by Nyquist apertures. Nyquist apertures used for higher storage densities generate optical aberrations and degrade the quality of the image that is recorded on the medium. Here, to correct the bit errors caused by the Nyquist aperture, an image upscaling method is used to restore the degraded image in the enhanced spatial frequency domain using its point spread function (PSF) as a restoration filter. The proposed method reduces the bit error rate (BER) significantly and hence allows higher storage densities.