We here illustrate
how a small number of geometrical principles enables the creation of a wide
range of abstract images, ranging from Mondrian-like juxtaposition of simple
figures to complicated textures. Most of these principles, such as exclusion,
occlusion or transparency, are at work in natural images formation.
lalvarez[ at ]dis.ulpgc.es, gousseau[ at ]enst.fr,
morel[ at ]cmla.ens-cachan.fr