NDLI: Gamma curve determination for each individual pixel on high-resolution flat panel display

Content Provider	IEEE Xplore Digital Library
Author	Mina Kim Won Hee Lee Se Yun Kim Hee Joon Kim Hoisik Moon Jong Beom Ra
Copyright Year	2015
Description	Author affiliation: Dept. of Electr. Eng., KAIST, Daejeon, South Korea (Mina Kim; Won Hee Lee; Jong Beom Ra) \|\| Samsung Display Co., Ltd., Asan, South Korea (Se Yun Kim; Hee Joon Kim; Hoisik Moon)
Abstract	This paper presents an automated system to determine gamma curves of each individual pixel on a high-resolution flat panel display. The system consists of a panel and its aligned area scan camera located at a fixed position. To localize a panel pixel position in an image captured from the aligned camera, a mapping function estimation scheme is proposed between the panel and the camera coordinates. The mapping function is modeled by combining both 2-D perspective transform and lens distortion and is estimated via feature-based registration. Intensity values of individual panel pixel are then measured for sampled gray-levels. To alleviate intensity interferences from neighboring pixels, we propose to use evenly spaced dot images as panel input. By using the measured intensity values of each panel pixel, gamma curves are determined to examine the characteristics of defects on the panel, if any. Experimental results show the relevance of the proposed method.
Starting Page	1795
Ending Page	1799
File Size	787624
Page Count	5
File Format	PDF
ISBN	9780992862633
ISSN	20761465
DOI	10.1109/EUSIPCO.2015.7362693
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-08-31
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	EURASIP
Subject Keyword	Image resolution Machine vision Nonlinear distortion Estimation Gamma curve determination Transforms Defect inspection Cameras High-resolution flat panel display Lenses
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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