The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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VLSI Implementation of Adaptive Shading Correction System Supporting Multi-Resolution for Mobile Camera

  • Ha, Joo-Young (Department of Electronic Engineering, Dong-A Univ.) ;
  • Lee, Sung-Mok (Department of Electronic Engineering, Dong-A Univ.) ;
  • Jang, Won-Woo (Department of Electronic Engineering, Dong-A Univ.) ;
  • Yang, Hoon-Gee (Department of Radio Science and Engineering, Kwangwoon Univ.) ;
  • Kang, Bong-Soon (Department of Electronic Engineering, Dong-A Univ.)
  • Published : 2006.12.30
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Abstract

In this paper, we say the adaptive shading correction system supporting multi-resolution for mobile camera. The shading effect is caused by non-uniform illumination, non-uniform camera sensitivity, or even dirt and dust on glass (lens) surfaces. In general this shading effect is undesirable [1-3]. Eliminating it is frequently necessary for subsequent processing and especially when quantitative microscopy is the fine goal. The proposed system is available on thirty nine kinds of image resolutions scanned by interlaced and progressive type. Moreover, the system is using forty kinds of continuous quadratic equations instead of using the piece-wise linear curve which is composed of multiple line segments. Finally, the system could correct the shading effect without discontinuity in any image resolution. The proposed system is implemented in VLSI with cell library based on Hynix $0.25{\mu}m$ CMOS technology.

Keywords

References

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