  The accretion around the black hole plays a pivotal role in the theoretical
analysis of black hole shadow, and of the black hole observation in particular.
In this paper, we mainly study the shadow and observation characteristics of
noncommutative Schwarzschild black holes wrapped by three accretion models, and
then explore the influence of noncommutative parameters on the observation
appearance and spacetime geometry of black holes. When the black hole is
surrounded by an optically and geometrically thin accretion disk, it shows that
the direct emissions always dominate the total observed intensity, while the
lensing ring superimposed upon the direct emission produces a thin ring, which
improves the observation intensity of the black hole image. However, the photon
rings makes a negligible contributions to the total observed brightness due to
its exponential narrowness, although the photon ring intersects the thin plane
more than three times to pick up larger intensity. More importantly, when the
noncommutative parameters changed, the corresponding regions and observation
intensities of photon ring, lensing ring and direct emission all change
correspondingly. For optical thin spherically symmetric accretion, we consider
the static and infalling matters, respectively. We find that the observation
intensity of the two spherical accretion models increase with the increase of
noncommutative parameters. In addition, due to the Doppler effect of the
infalling movement, the shadow image of infalling accretion is darker than that
of static accretion. In a word, the different accretion models and
noncommutative parameters will lead to different shadow images and optical
appearances of noncommutative Schwarzschild black holes.
