  Low Surface Brightness Galaxies (LSBGs) today constitute the less known
fraction of galaxies: their number density and their physical properties (e.g.
luminosity, colour, dynamics) are still largely uncertain. This is mainly due
to the difficoulty in finding them (since their presence goes often unnoticed
when astronomical images are analyzed with standard methods) and in measuring
their properties. We present here the first results of a novel application to
DPOSS plates, a project within the CRoNaRio collaboration. The aim is to build
a large catalog of LSBGs, with much better understanding of completness and
biases. First results are quite encouraging: in the same regions covered by
existing catalogues, done on the same plates, we find several new LSBGs in
addition to the known ones.
