ASIA unversity:Item 310904400/11492
English  |  正體中文  |  简体中文  |  Items with full text/Total items : 94286/110023 (86%)
Visitors : 21693052      Online Users : 890
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
    •  Adv. Search
    Home ‧ Login ‧ Upload ‧ Help ‧ About ‧ Administer Goto mobile version


    Please use this identifier to cite or link to this item: http://asiair.asia.edu.tw/ir/handle/310904400/11492


    Title: A Fast Calibrationless Method for Non-Linear Distortion Correction in Barcode Decoding:An Implementation of Industrial Aztec(ISO/IEC24778) 2D Barcode Decoder
    Authors: I-CHUNG KUO
    Contributors: Department of Biomedical informatics?
    Keywords: Non-Linear Distortion Correction;Radial Distortion;Calibrationless Correction Method;Trajectory Fitting;2D Barcode Decoding;Aztec
    Date: 2011
    Issue Date: 2011-09-26 02:39:42 (UTC+0)
    Publisher: Asia University
    Abstract: In this study, we follow international standard ISO/IEC 24778 to design and implement, under an industrial vision development platform, a high-performance Aztec 2D barcode decoder with a new calibrationless correction method for non-linear distortion.
    The proposed correction method horizontally and vertically fits the edges of a non-linear distorted barcode images to two sets of trajectory equations, respectively. References of the trajectory behaviors are those four distorted barcode boundary lines, which were straight before distortion. These best-fit trajectory equations can thereafter be used to reverse the distortion.
    To simplify the derivation of the sets of the trajectory equations, a reasonable and practical assumption is given: curvature of horizontal or vertical sets of trajectories are changing linearly from top to bottom and from left to right boundaries of the given barcode image. By this assumption, these trajectory equations can be obtained by simple mathematics.
    In this method, conventional computation-intensive equation solving, e.g. multivariate nonlinear optimizations, is avoided. Thus, an industrial class of barcode reader system with computation-efficient, calibrationless, and real-time non-linear correction can be achieved.
    Appears in Collections:[Department of Biomedical informatics  ] Theses & dissertations

    Files in This Item:

    File SizeFormat
    0KbUnknown654View/Open


    All items in ASIAIR are protected by copyright, with all rights reserved.

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback