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Retrospective shading correction algorithm based on signal envelope estimation

Reyes-Aldasoro, C. C. (2009). Retrospective shading correction algorithm based on signal envelope estimation. Electronics Letters, 45(9), pp. 454-456. doi: 10.1049/el.2009.0320


An additive retrospective non-parametric algorithm for the correction of the inhomogeneous intensity background of images, commonly known as shading, is presented. The algorithm assumed that an original unbiased image was corrupted by slowly-varying shading that could be estimated from the signal envelope in a process analogous to amplitude modulation detection. Unlike other filtering algorithms, the algorithm did not require pre-processing, parameter setting, user interaction, computationally intensive optimisation algorithms nor a restriction in size of the objects of interest relative to the scale of background variations. The algorithm provided satisfactory results for artificial and microscopical images.

Publication Type: Article
Additional Information: This paper is a postprint of a paper submitted to and accepted for publication in Electronic Letters and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at IET Digital Library.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: School of Science & Technology > Engineering
School of Science & Technology > Computer Science > giCentre
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