Attach image to taxonomy term?
You should make a view that lists the terms in your node (use contextual filters) and add the image fields you added to that term.


Create a node view that lists the node type that the categorized nodes come from.
Add the fields used to categorize the nodes.
Remove any other fields.
Add a contextual filter for the node id (Content:Nid).
Configure the contextual filter to have a default value and choose the 'id from url' option.
If you add that block to a region, it should show a list of terms associated with a node.
Now add the image field from the term, if you don't see that field you might need to add a relationship to that term field.