Title page for etd-0220112-111808


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URN etd-0220112-111808
Author Chun-Ting Hu
Author's Email Address to24163@yahoo.com.tw
Statistics This thesis had been viewed 5573 times. Download 627 times.
Department Marine Environment and Engineering
Year 2011
Semester 1
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title The Study of Aerial Images Enhancement by Bi-dimensional Empirical mode Decomposition
Date of Defense 2012-01-13
Page Count 108
Keyword
  • aerial image
  • enhancement
  • BEMD
  • contrast adjustment
  • color transform
  • Abstract Aerial images had been used in various fields. If the shooting it in conditions of bad weather, that quality was damage. So requires use of image processing methods for improvement. With the growth and progress of technology, image enhancement method is quickly flourishing. That needs of different options for the appropriate treatment.
    In this study, image enhancement by the nature of Bi-dimensional empirical mode decomposition (BEMD). Empirical mode decomposition in nonlinear signal processing has excellent results. It can break out some of the base signal and trend. In the BEMD of the signal information
    for the edge of the image, the trend term for the light distribution.
    Decomposition can be retained the edge features of the image, and
    contrast of light and shadow maps make adjustments to improve the
    uneven lighting situations. In order to retain the color information, so
    the decomposition of the image before the image for color conversion,
    will be divided into three degrees of brightness and color images, and
    then the brightness of the image for the decomposition of the action.
    The use of subjective and objective image evaluation indicators, to
    determine the two-dimensional empirical mode decomposition 
    method with other image enhancement difference. The results show that
    the conventional image enhancement has a problem that bright side of the whole image, resulting in reduced edge feature information. However,
    BEMD to effectively improve the image problem of uneven brightness
    and thoroughly to keep edge features.
    Advisory Committee
  • none - chair
  • none - co-chair
  • none - co-chair
  • Liang-Hwei Lee - advisor
  • shiahn-Wern Shyue - advisor
  • Files
  • etd-0220112-111808.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2012-02-20

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