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Joint nonuniform illumination estimation and deblurring for bar code signals

Title
Joint nonuniform illumination estimation and deblurring for bar code signals
Authors
Kim J.Lee H.
Ewha Authors
김정태
SCOPUS Author ID
김정태scopus
Issue Date
2007
Journal Title
Optics Express
ISSN
1094-4087JCR Link
Citation
vol. 15, no. 22, pp. 14817 - 14837
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We present a novel joint nonuniform illumination estimation and deblurring method for bar code signals based on a penalized nonlinear squares objective function. The objective function is based on the proper parameterization of a bar code signal and nonuniform illumination as well as a regularization on the illumination using a smoothness penalty. By the minimization of the objective function, the proposed method simultaneously estimates the bar code signal and illumination in the spatial domain. In simulations and experiments, the proposed method showed improved performance compared with two conventional bar code decoding methods without deblurring or nonuniform illumination correction. In a few iterations, the proposed method was able to decode test bar code signals that were not decodable due to blurring or nonuniform illumination. © 2007 Optical Society of America.
DOI
10.1364/OE.15.014817
Appears in Collections:
엘텍공과대학 > 전자공학과 > Journal papers
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