Abstract : This communication addresses the problem of estimating the parameters of a family of marked point processes. These processes are of interest in extraction of object networks from remote sensing images. They are deﬁned from a combination of several energy terms. First, a data energy term controls the localization of the objects with respect to the data. Second, prior information is given by intern energy terms corresponding to geometrical constraints on the conﬁguration to be detected. An estimation procedure of the weight associated with these energies is studied. The application to unsupervised detection of objects is ﬁnally discussed.