dahlia/wand — pull request #45 by pflorczyk (2012-08-24 14:26:46+00:00)
Title: Added Image.units property

By the way. There is something wrong with wandtests/assets/marked.png. It returns "Units: PixelsPerInch" even if I check it with identify from IM. AFAIK png can only use undefined or pixelspercentimeter.