Theoretical luminosity functions of the elliptical (blue, orange, and green) and spiral (red, purple, and brown) populations at redshift z = 0 (top) and z = 2 (bottom). The legend applies to both panels. The parameters used for each luminosity function are given in Table 6. These curves show the higher integrated density of spiral galaxies than of elliptical galaxies. The steep faint-end slope of the spiral population implies that the images contain many faint spiral galaxies, which is not the case for the elliptical population. There is also a redshift effect that decreases the proportion of ellipticals or spirals when looking at distant objects.