I am interested if it is possible to distinguish the software used to make an image from its metadata. For example, using imagemagick, a command-line tool, I can see that one specific image was made using Adobe ImageReady:
In general however, software like Illustrator or Sketch do not by default include this explicit information in their metadata. So I am looking for a clever way to infer (of course never with absolute certainty) the software program used to export. For example, perhaps Sketch metadata automatically reports interlace method, but Illustrator only does so if you change the default option in export.