  By exploring the photon motion in the region near the Bardeen black hole, the
shadow and luminosity of the black hole surrounded by different accretions are
studied in this paper. We analyzed the changes in shadow imaging and
observation luminosity when the relevant physical parameters are changed. In
the static and infalling spherical accretion, although the radius of the shadow
and the position of the photon spheres do not change in the two models, the
observation intensity of the black hole with infalling accretion is
significantly lower than that of the static accretion. In particular, in the
case of the thin disk accretion, we study the contribution of the photon rings,
lensing rings and direct emission to the total observed flux. The result shows
that the observed brightness of black holes is mainly determined by direct
emission. Furthermore, in the different forms of the emission modes, the
lensing ring will provide a small part of the observation flux, while the
photon ring can provide a negligible observation flux. After that, we compare
our results with the Schwarzschild black hole, we find that the existence or
change of the parameter $g$ will greatly affect the imaging and observation
intensity of black hole shadow. Hence, the parameter $g$ change the spacetime
structure which affects the photon sphere, the deflection angle and the
observations of black hole shadows.
