It turns out that PDL has a set of routines for precisely this task: fitwarp2d, applywarp2d.

<Reveal this spoiler or all in this thread>

The results are not that great, but it works out of the box.

In reply to Re: Abstract image registration or feature detection [UPDATED w examples] by kikuchiyo
in thread Abstract image registration or feature detection [UPDATED w examples] by kikuchiyo

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