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공과대학
전자전기공학전공
Journal papers
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Retrospective correction of nonuniform illumination on bi-level images
Title
Retrospective correction of nonuniform illumination on bi-level images
Authors
Lee H.
;
Kim J.
Ewha Authors
김정태
SCOPUS Author ID
김정태
Issue Date
2009
Journal Title
Optics Express
ISSN
1094-4087
Citation
Optics Express vol. 17, no. 26, pp. 23880 - 23893
Indexed
SCI; SCIE; SCOPUS
Document Type
Article
Abstract
We propose a novel method for correcting the effect of nonuniform illumination on a bi-level image. The proposed method is based on a penalized nonlinear least squares objective function that measures the binariness of an image and the roughness of illumination. Compared with conventional methods, it has the advantages of 1) not suffering from a trivial minimizer, 2) not requiring tuning of design parameters, and 3) effective optimization. In addition, it yields a unique solution since the minimization of the objective function is well-posed. In simulations and experiments, the method showed better accuracy and speed than the conventional entropy-based method. ©2009 Optical Society of America.
DOI
10.1364/OE.17.023880
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