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A Revised Dynamic ROI Coding Method Based On The Automatic ROI Extraction For Low Depth-of-Field JPEG2000 Images

  • Journal of The Korea Society of Computer and Information
  • Abbr : JKSCI
  • 2009, 14(10), pp.63-71
  • Publisher : The Korean Society Of Computer And Information
  • Research Area : Engineering > Computer Science

PARK JAE HEUNG 1 심종채 2 Yoo Chang-Yeul 2 Seo Yeong Geon 1 강기준 1 HyunJu Kim 3

1경상대학교
2경남도립남해대학
3경남과학기술대학교

Accredited

ABSTRACT

In this study, we propose a revised dynamic ROI (Region-of-Interest) coding method in which the focused ROI is automatically extracted without help from users during the recovery process of low DOF (Depth-of-Field) JPEG2000 image. The proposed method creates edge mask information using high frequency sub-band data on a specific level in DWT (Discrete Wavelet Transform), and then identifies the edge code block for a high-speed ROI extraction. The algorithm scans the edge mask data in four directions by the unit of code block and identifies the edge code block simply and fastly using a edge threshold. As the results of experimentation applying for Implicit method, the proposed method showed the superiority in the side of speed and quality comparing to the existing methods.

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