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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.
|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)|
|Divisions:||School of Engineering & Mathematical Sciences > Engineering|
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