Asymmetric Generalized Gaussian Mixturesfor Radiographic Image Segmentation

Auteurs :  Nafaa Nacereddine, Djemel Ziou
Année : 2016
Domaine : Electronique
Type : Article de journal
Revue : Advances in Intelligent Systems and Computing
Résumé en PDF :  (résumé en pdf)
Fulltext en PDF :  (.pdf)
Mots clés : AGGD, radiography, MLE/EM, MME/EM, image segmentation

Résumé : 

In this paper, a parametric histogram-based image segmentation methodis used where the gray level histogram is considered as a finite mixture of asymmetricgeneralized Gaussian distribution (AGGD). The choice of AGGD is motivated byits flexibility to adapt the shape of the data including the asymmetry. Here, themethod of moment estimation combined to the expectation–maximization algorithm(MME/EM) is originally used to estimate the mixture parameters. The proposedimage segmentation approach is achieved in radiographic imaging where the imageoften presents an histogram with a complex shape. The experimental results providedin terms of histogram fitting error and region uniformity measure are comparableto those of the maximum likelihood method (MLE/EM) with the advantage thatMME/EM method reveals to be more robust to the EM initialization than MLE/EM.