Histogram of the corrected central surface brightness of the disk component in the g band μ_0,d,cor(g) for the selected face-on, late-type galaxies (1118 in total). The entire sample is divided into three categories: the region where μ_0,d,cor(g) ≥ 22.3 mag arcsec⁻² represents LSB galaxies (159, indicated by the blue region), the region with 21.7 < μ_0,d,cor(g) < 22.3 mag arcsec⁻² denotes LSB candidates (388, represented by the black region), and the region where μ_0,d,cor(g) ≤ 21.7 mag arcsec⁻² shows HSB galaxies (571, shown in the red region).