On the perimeter of excursion sets of shot noise random fields

Hermine Biermé (1) , Agnès Desolneux (2)

1 LMA [Poitiers] - Laboratoire de mathématiques et applications [UMR 7348]
2 CMLA - Centre de Mathématiques et de Leurs Applications

In this paper, we use the framework of functions of bounded variation and the coarea formula to give an explicit computation for the expectation of the perimeter of excursion sets of shot noise random fields in dimension $n\geq 1$. This will then allow us to derive the asymptotic behavior of these mean perimeters as the intensity of the underlying homogeneous Poisson point process goes to infinity. In particular, we show that two cases occur: we have a Gaussian asymptotic behavior when the kernel function of the shot noise has no jump part, whereas the asymptotic is non-Gaussian when there are jumps.

Domaines: Probabilités [math.PR]

Hermine Biermé, Agnès Desolneux. On the perimeter of excursion sets of shot noise random fields. 2015. ⟨hal-00871991v2⟩