Image Enhancement for Automated TFT-LCD Inspection System Using Estimation of Intensity Flow

Woo-Seob KIM  Jong-Hwan OH  Chan-Ho HAN  Kil-Houm PARK  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E90-C   No.11   pp.2126-2130
Publication Date: 2007/11/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e90-c.11.2126
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Section on Electronic Displays)
Category: 
Keyword: 
inspection system,  TFT-LCD,  image pyramid,  intensity flow,  image enhancement,  

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Summary: 
We propose a filtering method for optimal estimation of TFT-LCD's surface region except defect's region. To estimate the non-uniform intensity variation on TFT-LCD surface region, the 4-directional Gaussian filter based on image pyramid structure is proposed. The experimental result verified the proposed method's performance