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An Image Processing Technique for Polarizing Film Defects Detection  

Sohn, Sang-Wook (Department of Electrical Engineering, Chungbuk National University)
Ryu, Geun-Taek (Department of Biomedical Engineering, Keukdong College)
Bae, Hyeon-Deok (Department of Electrical Engineering, Chungbuk National University)
Publication Information
전자공학회논문지 IE / v.45, no.2, 2008 , pp. 20-27 More about this Journal
Abstract
In this paper, we propose a new image processing technique that reliably detects the various defects of TFT-LCD polarizing films. The image of polarizing film is acquisited from reflected laser beam First, we apply the morphological image processing technique to remove the background noise. Next, we use the 2-dimensional LMS adaptive filtering and statistical characteristics to detect the white and black defects. Performance of the proposed method is evaluated on real TFT-LCD polarizing film samples.
Keywords
TFT-LCD polarizing film; defects detection; morphological image processing; 2-dimensional LMS;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 Definition of measurement index for luminance mura in FPD image quality inspection, SEMI standard:SEMI D31-1002
2 D. A. Belsley, E. Kuh, and R. E. Welsch, Regression Diagnosticx, John Wiley & Sons, 1980
3 Rafael C. Conzalez and Richard E. Woods, Digital Image Processing, Prentice Hall 2001
4 Tannas. L. E. Jr, "Evolution of flat-panel display," Proceedings of the IEEE, vol. 82, no. 4, pp. 499-509, Apr.1994   DOI   ScienceOn
5 Lars Heucke, Mirko Knaak, and H. Zhu, "A new image segmentation method based on human brightness perception and foveal adaptation," IEEE Signal Processing Letters, vol.7, no.3, pp.468-473, July 1998
6 S. I. Beak, W. S. Kim, T. M. Koo, I. Choi, and K. H. park, "Inspection of defect on LCD panel using polynomial approximation," IEEE TENCON'04, vol. A21-24, pp. 235-238, Nov. 2004
7 G. B. Lee, C. G. Lee S. Y. Kim, and K. H. Park, "Adaptive surface fitting for inspection of FPD devices using multilevel B-spline approximation," IEEE TENCON'05 pp. 144-148, Nov. 2005
8 J.H Kim, S. Ahn, J.W. Jeon, and J.E. Byun, "A high-speed high-resolution vision system for the inspection of TFT-LCD," Procedings of ISIE 2001. vol. 1, pp. 101-105, Jun. 2001
9 Hewlett-Packard Development Company, "Understanding pixel defects in TFT-LCD flat panel monitors," Hewlett-Packard, 2004
10 Lars Jeucke, Mirko Knaak, and Reinhold Orglmester,"A new image segmentation method on human brightness perception and foveal adaptation," IEEE Signal Processing Letters, vol. 7, no. 6, pp. 129-131, June 2000   DOI   ScienceOn
11 Simon Haykin, Adaptive Filter Theory, Prentice Hall 2002
12 오종환, 박길흠, "인간 시각시스템의 주파수 감도를 이용한 TFT-LCD 결함강조," 전자공학회 논문지, 44권, SP편, 5호, pp. 20-27, Sep., 2007   과학기술학회마을