typically handle structure propagation by defining the right filling order
[9], [15].Once the filling order is determined, most of the methods choose plausible candidates for
replacement patches based solely on the agreement with the undamaged part of a single target patch
[see Figure 7(a)], and concentrate on defining effective distance metrics between the
known portion of the target and the candidates [20]. Matching only
against a small part within the target patch increases the risk of
propagating wrong textures and wrong colors into the missing
region. Global methods, such as [17] and [25], allow multiple candidates and optimize their mutual agreement in the overlap
regions [Figure 7(b)], but even this cannot ensure agreement with
surrounding undamaged structures: the optimization that takes
care that neighboring replacement patches mutually agree cannot
“undo” the damage done by selecting wrong candidates in the first
place. Ideally, undamaged areas around the target patch should be
taken into account in the candidate selection as well, ensuring that
plausible candidates agree with true structures [see Figure 7(c)].