Sorting images according to their width and height

I wrote a script to sort images according to their width and height.
I found myself in need of such a thing after my previous post on how to download 4chan images automatically.
I used this script a few times to get all the wallpapers on the /wg/ board.

After a few GB of images, nautilus starts to get a headache when opening the containing folder.
So I needed to split it up in different folders.
So here’s the script that does it.

There still seems to be a problem with character escaping when the filename contains a ” – ” in it’s title.
But I’m too tired to figure it out now.