  Based on drizzled F606W and F814W images, we present quantitative structural
parameters in the V-band rest-frame for all galaxies with z<1 and
I_814(AB)<24.5 mag in the Hubble Deep Fields North and South. Our structural
parameters are based on a two-component surface brightness distribution using a
Sersic bulge and an exponential disc. Detailed simulations and comparisons with
previous work are presented. The luminosity-size distribution of early-type
galaxies is consistent with the hypothesis that their structural properties
were already in place by z~1 and have evolved passively since then; early-type
galaxies were ~1.35(+-0.1) mag brighter in rest-frame V-band luminosity at
z~0.7 than now. Compared to present day late-type galaxies, those at z~0.7 with
L_V>0.2x10^{10} h^{-2} L_sun show a moderate decrease (~30(+-10)%) in size (or
interpreted differently, a decrease of ~0.77(+-0.30) mag in the central surface
brightness) at a given luminosity. Finally, we make a comparison of our results
with the infall and hierarchical models.
