Vertical‐to‐radial scales ratio of the stellar disks ﹩z_{0}/ h﹩ vs. their central surface brightness ﹩\mu _{0}﹩ in the R band. The objects from our sample are denoted by squares. The open squares are for the HSB subsample, and the filled ones designate the LSB galaxies. The galaxies taken from Barteldrees & Dettmar (1994) are shown as crosses, and the 2MASS objects are denoted by triangles.