Author/Editor		Tomaževič, Dejan; Likar, Boštjan; Pernuš, Franjo
Title		A comparison of retrospective shading correction techniques
Type		članek
Source		International conference on pattern recognition
Publication year		2000
Volume		str. 568-71
Language		eng
Abstract		In this paper we describe the problem ojretrospective 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 reduct*on of true intensity var*ations 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.
Descriptors		IMAGE PROCESSING, COMPUTER-ASSISTED