The current PGM reader handles the traditional 8-bit pixels just fine, but doesn't handle 16-bit images, at least from what I can tell. I bet its a pretty easy change to update the code to read the data correctly and at least auto-scale to 8 bits in the reader.
If it helps, here's a link to info on 16-bit PGM files:
(I decided to call this a new feature, since PGM file support started before 16-bit PGMs were officially part of PGM.)
If it helps, here's a link to info on 16-bit PGM files:
(I decided to call this a new feature, since PGM file support started before 16-bit PGMs were officially part of PGM.)