Patent 7715045 was granted and assigned to Pitney Bowes on May, 2010 by the United States Patent and Trademark Office.
A method includes scanning a page of a paper document to generate a first digital page image. The method further includes obtaining a second digital page image which corresponds to a second page. The method also includes comparing the first digital page image pixel-by-pixel with the second digital page image to generate a score that indicates a degree to which the first digital page image differs from the second digital page image.