Methods and systems for holographic data recovery

Image analysis – Image transformation or preprocessing – Changing the image coordinates

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C382S210000, C382S211000, C359S013000, C359S022000, C359S032000

Reexamination Certificate

active

07738736

ABSTRACT:
A method for holographic storage data recovery in a holographic storage system is presented. One exemplary method includes detecting a stored image at a detector such that the image is oversampled. A relationship is determined between a location of the detected image and a location of the source image. Pixel information associated with the source image may be obtained from the detected image based on a fractional delay filter. In one example, the image may be oversampled by magnifying the detected image at the detector and/or having a detector with pixel sizes and spacing less than the image pixel size. Further, coefficients of the fractional delay filter may be determined, at least in part, on magnification and shift information of the image based on known registration marks.

REFERENCES:
patent: 4866647 (1989-09-01), Farrow
patent: 5251313 (1993-10-01), Spenik et al.
patent: 5694488 (1997-12-01), Hartmann
patent: 5719691 (1998-02-01), Curtis et al.
patent: 5920536 (1999-07-01), Campbell et al.
patent: 5940537 (1999-08-01), Regen et al.
patent: 5982513 (1999-11-01), Zhou et al.
patent: 6031643 (2000-02-01), Burr
patent: 6175543 (2001-01-01), Burr et al.
patent: 6191875 (2001-02-01), Curtis et al.
patent: 6205107 (2001-03-01), Burr
patent: 6414296 (2002-07-01), Edwards
patent: 6526538 (2003-02-01), Hewitt
patent: 6697316 (2004-02-01), Burr
patent: 2002/0172131 (2002-11-01), Burr
Valimaki et al., “Fractional Delay Digital Filters”, IEEE International Symposium, May 3-6, 1993, 355-358.
Valimaki and Laakso; “Principles of Fractional Delay Filters”; IEEE ICASSP'00, Jun. 5-9, 2000, pp. 3870-3873. vol. 6.
C. Tseng; “Eigenfilter approach for the design of variable fractional delay FIR and all-pass filters”; Vision, Image and Signal Processing, IEE proceedings, vol. 149, Issue 5, Oct. 2002 pp. 297-303.
Author Unknown (Dec. 2003).Data Interchange on 120 mm and 80mm Optical Disk Using +RW Format—Capacity: 4, 7 and 1,46 Gbytes per Side, Recording Speed up to 4Xprovided by ECMA International Standardizing Information and Communication System, Standard ECMA-337, 2ndEdition (Includes Table of Contents).
Burr, G. W. (Apr. 1, 2002). “Holographic Data Storage with Arbitrarily Misaligned Data Pages,”Optics Letters27(7):542-544.
Burr, G. W. et al. (Apr. 15, 2001). “Compensation for Pixel Misregistration in Volume Holographic Data Storage,”Optics Letters26(8):542-544.
Criminisi, A. et al. (May 6, 2003). “Academic: Perspective Transform Estimation,” located at <http://xenia.media.mit.edu>, last visited on May 6, 2003, 6 pages.
Johansson, H. et al. (Aug. 28-31, 2001). “On Adjustable Fractional Delay FIR Filters and Their Design,”ECCTD'01—European Conference on Circuit Theory and Design,4 pages.
Roth, R. M. et al. (1999). “Efficient Coding for a Two-Dimensional Runlength-Limited Constraint,”Proceedings of the SPIE—Int. Soc. Opt. Eng. USA3802:8-17, Nov. 1999.
U.S. Appl. No. 10/305,769, filed Nov. 27, 2002, Curtis et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Methods and systems for holographic data recovery does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods and systems for holographic data recovery, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and systems for holographic data recovery will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4175750

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.