Copyright is the exclusive legal right, given to an originator or an assignee to print, publish, perform, film, or record literary, artistic, or musical material, and to authorize others to do the same. Now look at the following example.
John Taylor deconstructs iconic movie posters at Film the Blanks (many of them also available for sale in poster form). They original posters are stripped to their bare essentials, but are still recognizable. Is this copyright infringement? Fair use maybe?
Fair use or not: these great posters can come in handy on long winter evenings were you and your friends can see who recognizes the most motion pictures. Oh yes, and they look great in your office too!