Forum:Scanned images and copyright/fair use

I want to know if fair use or similiar legal things allow to insert a scanned image from a book or magazine, wich visualizes the context of an article? I mean if there exists some sourcebook and I created an article about a specific topic in it, summarizing things, etc. and then there is also a picture to the topic, can I scan it and insert it in a wiki, or is that a copyright violation and therefore not allowed? Historicus 12:49, 4 April 2009 (UTC)