The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Frequency Domain Pre-Processing for Automatic Defect Inspection of TFT-LCD Panels

TFT-LCD 패널의 자동 결함 검출을 위한 주파수영역 전처리

  • 김현도 (단국대학교 공과대학 전자전기공학부) ;
  • 남승욱 (단국대학교 대학원 전기공학과)
  • Published : 2008.07.01
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Abstract

Large-sized flat-panel displays are widely used for PC monitors and TV displays. In this paper, frequency domain pre-filter algorithms are presented for detection of defects in large-sized Thin Film Transistor-Liquid Crystal Display(TFT-LCD) panel surfaces. Frequency analysis with 1-D, 2-D FFT methods for extract the periodic patterns of lattice structures in TFT-LCD is performed. To remove this patterns, frequency domain band-stop filters were used for eliminating specific frequency components. In order to acquire only defected images, 2-D inverse FFT methods to inverse transform of frequency domain images were used.

Keywords

References

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