  This work investigates observational properties, namely the shadow and photon
ring structure, of emission profiles originated near compact objects. In
particular, we consider a distorted and deformed compact object characterized
by quadrupoles and surrounded by an optically thin and geometrically thin
accretion disk with different emission profiles modeled by the Johnson's
Standard-Unbound (SU) distribution in the reference frame of the emitter. Under
these assumptions, we produce the observed intensity profiles and shadow images
for a face-on observer. Our results indicate that, due to the fact that
modifications of the quadrupole parameters affect the radius of the innermost
stable circular orbit (ISCO) and the photon sphere (PS), the observed shadow
images and their properties are significantly influenced by the quadrupole
parameters and emission profiles. Furthermore, we analyze the impact of the
presence of a dark matter halo in the observational imprints considered and
verify that both the increase in the matter contained in the halo or decrease
in the length-scale of the halo lead to an increase in the size of the observed
shadow. Our results indicate potential degeneracies between the observational
features of distorded and deformed compact objects with those of spherically
symmetric blackholes, which could be assessed by a comparison with the current
and future generation of optical experiments in gravitational physics.
