  We have studied a sample of 101 bright 2MASS galaxies from the Large Galaxy
Atlas (LGA), whose morphologies span from early to late-types. We have
generated estimates for structural parameters through a two-dimensional (2D)
surface brightness photometric decomposition in the three 2MASS bands (J, H,
Ks). This work represents a detailed multi-component photometric study of
nearby galaxies. We report total magnitudes, effective radii, concentration
indices, among other parameters, in the three 2MASS bands. We found that the
integrated total magnitudes of early-type galaxies (ETGs) measured on 2MASS LGA
mosaics are ~0.35 mag dimmer, when compared with images generated from IRSA
image tiles service; nevertheless, when comparing late-type galaxies (LTGs) we
did not find any difference. Therefore, for ETGs we present the results derived
on IRSA image tiles, while for LTGs we used data from the LGA mosaics.
Additionally, by combining these structural parameters with scaling relations
and kinematic data, we separated classical bulges from pseudobulges. We found
that ~40 % of the objects in our sample are classified as pseudobulges, which
are found preferentially in LTGs. Also, our findings confirm trends reported
earlier in the distributions for some physical parameters, such as S\'ersic
index, B/T and q ratios. In general, our results are in agreement with previous
one-dimensional studies. In a companion paper, we revise some of the scaling
relations among global galaxy properties, as well as their interrelation with
Supermassive Black Holes.
