Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2007.07a
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- Pages.1864-1865
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- 2007
Automatic Defect inspection of TFT-LCD Panels Using a Pre-Filter
프리필터를 이용한 TFT-LCD 패널의 자동 결함 검출
- Nam, Seung-Uk (Dept. of Electrical Engineering Dankook University) ;
- Seo, Sung-Dea (Dept. of Electrical Engineering Dankook University) ;
- Nam, Hyun-Do (Dept. of Electrical Engineering Dankook University) ;
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Ahn, Dong-Jun
(Div. of Automobile, Ajou Motor College)
- Published : 2007.07.18
Abstract
In this paper, we proposed pre-filter algorithms which using frequency domain analysis method, for the detections of defects in large-sized Thin Film Transistor-Liquid Crystal Display(TFT-LCD) panel surfaces. We performed frequency analysis with 1-D, 2-D FFT methods for extract periodic patterns of lattice structures in TFT-LCDs. To remove this patterns, band-stop filters were used for eliminating specific frequency components. In order to acquire only defected images, we used 2-D inverse FFT methods which can be reverts images that remains defects.
Keywords