[Matplotlib-users] Optimal resolution for imshow

[Christoph G. <cw...@fa...>]

Hello,

Is there a way to find out the optimal resolution that an array (of a given
aspect ratio) should have, so that imshow will not re-scale it on a
pixel-based backend?

Some background: I'm preparing an array that has a native resolution, so for
PDF output I use imshow with interpolation='none'.  For PNG-output, however,
the array has to be rescaled.  I would prefer to prepare the array in the
correct resolution right away.

Thanks in advance,
Christoph