  We study scattering of waves by black holes. Solving a massless scalar field
with a point source in the Schwarzschild spacetime, waves scattered by the
black hole is obtained numerically. We then reconstruct images of the black
hole from scattered wave data for specified scattering angles. For the forward
and the backward directions, obtained wave optical images of black holes show
rings that correspond to the black hole glories associated with existence of
the unstable circular photon orbit in the Schwarzschild spacetime.
