Image oversampling for page-oriented optical data storage.
نویسندگان
چکیده
Page-oriented data storage systems incorporate optical detector arrays [such as complementary metal-oxide semiconductor (CMOS) arrays] in order to read data images. For laboratory demonstrations the detector array is typically pixel matched to the data image [Opt. Lett. 22, 1509 (1997)]. This approach requires exceedingly high-performance optics and mechanics for the simultaneous alignment of each data-bearing pixel image to a detector element to be achieved. Systems intended for commercialization are designed with detector arrays that spatially sample the image at or above the Nyquist rate in order to read poorly aligned and distorted images [S. Redfield, Holographic Data Storage (Springer-Verlag, 2000), pp. 347-349]. However, for data page sizes exceeding a megapixel this approach becomes prohibitive in terms of detector bandwidth, size, power, cost, and processing requirements. We have instead developed a sub-Nyquist oversampling methodology that can recover arbitrarily aligned and distorted megapixel data page images with pixel-matched fidelity by using fewer than double the number of detector pixels. Features required for practicable implementation are described, including fiducials for alignment determination.
منابع مشابه
Adaptive code modulation for 2D optical memories - Optical Memory and Optical Data Storage Topical Meeting, 2002. International Symposium on
Volumetric and page oriented optical storage systenwhave a great potential for high data density and high speed through page oriented data access [l]. However, in order to be practical, they have to maintain data integrity using error correction and modulation codes. The coding comes at a cost of spatial overhead of codeword size over the source data size, and processing time overhead for encod...
متن کاملAdaptive code modulation for 2D optical memories
Volumetric and page oriented optical storage systems have a great potential for high data density and high speed through page oriented data access [1]. However, in order to be practical, they have to maintain data integrity using error correction and modulation codes. The coding comes at a cost of spatial overhead of codeword size over the source data size, and processing time overhead for enco...
متن کاملTwo-dimensional binary halftoned optical intensity channels [optical wireless communications]
The capacity of two-dimensional (2D) optical intensity channels in which transmit images are constrained to be binary-level has been considered. Examples of such links exist in holographic storage, page-oriented memories, optical interconnects, 2D barcodes as well as multiple-input/multiple-output wireless optical links. Data are transmitted by sending a series of time-varying binary-level opti...
متن کاملEffects of cross talk on fidelity in page-oriented volume holographic optical data storage.
متن کامل
Two-Dimensional Binary Halftoned Optical Intensity Channels
This paper considers the capacity of two-dimensional optical intensity channels in which transmit images are constrained to be binary-level. Examples of such links exist in holographic storage, page-oriented memories, optical interconnects, two-dimensional barcodes, as well as MIMO wireless optical links. Data are transmitted by sending a series of time-varying binary-level optical intensity im...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Applied optics
دوره 45 11 شماره
صفحات -
تاریخ انتشار 2006