Reviews: Region-specific Diffeomorphic Metric Mapping

The paper is well written, although *very* dense both in terms of mathematical expectation and development, as well as in terms of space. It is *not* an easy read (I suppose unless you are super fluent in LDDMM background). I think the authors could improve this to help this paper reach a broader audience, or perhaps they are not interested in this, I'm not sure. As it stands, it is a *bit* hard to evaluate due to the super condensed and dense nature of it. I believe this is a technical clean contribution with a clear advancement.