a) Surface brightness profile (SBP) of NGC 7625 (open circles) computed from SDSS r-band data with the overlaid gray line showing a linear fit to the LSB host for R^⋆≥ 20′′. Filled circles show synthetic r-band SBPs obtained by applying to CALIFA IFS data for four t_cut values (0, 0.3, 3, and 5 Gyr). b) True-color composite image computed by applying the flux-conserving unsharp masking technique by Papaderos et al. (1998) to the SDSS g, r, and i images. The contours delineate the morphology of the emission-line free stellar continuum between 6390 Å and 6490 Å, as obtained from CALIFA IFS data.