 Software tools for computing approximations of Minkowski Functionals on binary 2D or 3D images are now available based on mathematical methods due to CERA, LENG and OSIR. The measure of surface area is used to describe spatial heterogeneity of a synthetic structure and of an image of tomato paracarp. This article was authored by David Legland, Kin Kio, and Marie-France Wastaveau.