| Title |
Frequency Domain Pre-Processing for Automatic Defect Inspection of TFT-LCD Panels |
| Authors |
김현도(Nam, Hyun-Do) ; 남승욱(Nam, Seung-Uk) |
| Keywords |
Automatic Defect Inspection ; Flat Panel Display ; Vision ; Frequency Domain Filters |
| 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. |