In the following sections we present a series of examples of ISOCONT using mainly an optical image of M51 recovered as a FITS file from the digitized sky survey (m51_dss.fits) and a CIA raster data structure of the ISOCAM observations [4] of M51 ( iso_struct_raster). In a couple of case we also use a FITS file of the ISOCAM data (m51_iso.fits) which was created using the CIA command raster2fits.