On the next stage, region relighting is performed on the candidate relighting
pairs according to the process described in section 2. After that, we label the set
of relit regions as lit. Hence, new pairs of lit-shadow regions are created so we
can start a new cycle of identifying candidate relighting pairs using the classier
and then relighting regions based on the positive classications. Figures 5(b)
and 5(c) depict the shadow removal results after the rst and second iterations
of our method, respectively. As we can observe, there are three isolated shadow
regions (no lit neighbors) that are successfully relit in the second round.
As a nal step, we address the so far ignored boundary pixels. To remove the
shadow in the outer perimeter ps of a relit shadow region b Rs, we propose a two
step operation: