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

PARK JAE HEUNG; 심종채; Yoo  Chang-Yeul; Yeong-Geon Seo; 강기준; HyunJu Kim

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 : Computer Science

PARK JAE HEUNG ¹, 심종채 ², Yoo Chang-Yeul ³, Yeong-Geon Seo ⁴, 강기준 ⁵, HyunJu Kim ⁶

¹경상대학교
²경남도립남해대학
³경남도립남해대학
⁴경상대학교
⁵경상대학교
⁶경남과학기술대학교

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.
KEYWORDS

관심영역(Region-Of-Interest), Dynamic ROI coding, low DOF image, Automatic ROI extraction
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