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

  • 제57권7호
  • /
  • Pages.1295-1297
  • /
  • 2008
  • /
  • 1975-8359(pISSN)
  • /
  • 2287-4364(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

TFT-LCD 패널의 자동 결함 검출을 위한 주파수영역 전처리

Frequency Domain Pre-Processing for Automatic Defect Inspection of TFT-LCD Panels

  • 김현도 (단국대학교 공과대학 전자전기공학부) ;
  • 남승욱 (단국대학교 대학원 전기공학과)
  • 발행 : 2008.07.01
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초록

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.

키워드

참고문헌

  1. Oh J.H et als, 'Line defect detection in TFT-LCD using directional filter bank and adaptive multilevel thresholding,' Key Engineering Materials, pp.270-273, 2004
  2. Du M.T., Chung Y.H., 'Automatic defect inspection of patterned TFT-LCD panels using 1-D Fourier reconstrution and Wavelet decomposition,' Int. J. of Production Res., pp.4589-4607, 2005
  3. Chi J.L. and Du M.T., 'Defect detection of patterned TFT-LCD surface using independent component analysis,' 中國工業工學會, 2004
  4. Gonzalez, R.C., Woods, R.E. and Eddins S.L., Digital Image Processing using Matlab, Prentice Hall, 2004