Text, images, and/or graphics of electronic documents should be organized and laid out in a two-dimensional format for presentation to the viewer. The best such layout depends upon the content present, the creator's intent, the output device, and the viewer's interests. To analyze the qualitative nature...http://www.google.com.hk/patents/US7280675?utm_source=gb-gplus-share專利 US7280675 - Method for measuring and quantizing document quality
