A comparison of retrospective shading correction techniques

We describe the problem of retrospective shading correction, which is a necessary pre-processing step in many tasks of image analysis. Eight algorithms are implemented and compared. The performance of the algorithms was analysed on three sets of differently structured synthetic shaded and shading-fr...

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Bibliographic Details
Published inProceedings 15th International Conference on Pattern Recognition. ICPR-2000 Vol. 3; pp. 564 - 567 vol.3
Main Authors Tomazevic, D., Likar, B., Pernus, F.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2000
Subjects
Absorption
Calibration
Electromagnetic interference
Filtering
Image analysis
Lighting
Low pass filters
Microscopy
Nonlinear filters
Performance analysis
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Summary:We describe the problem of retrospective shading correction, which is a necessary pre-processing step in many tasks of image analysis. Eight algorithms are implemented and compared. The performance of the algorithms was analysed on three sets of differently structured synthetic shaded and shading-free images. The results show that the entropy minimisation (EMI) method outperforms the other methods in terms of the reduction of true intensity variations and preservation of intensity characteristics of the shading-free images. The strength of EMI is especially apparent when applied to images containing large-scale objects.
ISBN:0769507506
9780769507507
ISSN:1051-4651
2831-7475
DOI:10.1109/ICPR.2000.903608