Nouveau modèle de texture markovien basé sur la loi K : Application à l'echographie

We propose in this article a new model of the coherent imagery texture based on Markov Random field. This model permits to take in account the spatial information of the texture while preserving a local distribution . In order to respect the luminous intensity properties, one chooses to stand locally in the setting of the product model. Thus, the construction of this model implies the construction a Markov random field with a local distribution gamma. This last model is chosen outside of the class of auto-models of Besag in order to be able to control easily its local average. In order to understand the role of the field parameters, a synthetic texture whole is presented here. This model is tested then on textures extracted of echographic pictures.