A triggering system and process for a form reader is shown using a histogram of the optical scene. The form reader is open on three sides with a camera facing a platen on to which a form is placed. The camera converts the light rays reflected from the platen into a video stream that is sent to a processor....http://www.google.de/patents/US8059168?utm_source=gb-gplus-sharePatent US8059168 - System and method for scene change triggering
