  Structural decomposition of galaxies into bulge, disk, and bar components is
important to address a number of scientific problems. Measuring bulge, disk,
and bar structural parameters will set constraints on the violent and secular
processes of galaxy assembly and recurrent bar formation and dissolution
models. It can also help to quantify the fraction and properties of bulgeless
galaxies (those systems having no bulge or only a relatively insignificant
disky-pseudobulges), which defy galaxy formation paradigms requiring almost
every disk galaxy to have a classical bulge at its core. We demonstrate a proof
of concept and show early results of our ongoing three-component bulge-disk-bar
decomposition of NIR images for a sample of three complementary samples
spanning different epochs and different environments (field and cluster). In
contrast to most early studies, which only attempt two-component bulge-disk
decomposition, we fit three components using GALFIT: a bulge, a disk, and a
bar. We show that it is important to include the bar component, as this can
significantly lower the bulge-to-total luminosity ratio (B/T), in many cases by
a factor of two or more, thus effectively changing the Hubble type of a galaxy
from early to late.
