In an implementation, an appearance of lens is displayed on a display device for a selected region of an image to magnify the selected region of the image in comparison with a portion of the image outside of the appearance of the lens. A zoomed-in view of the image is displayed on the display device...http://www.google.com.mx/patents/US8139089?utm_source=gb-gplus-sharePatent US8139089 - Navigating digital images using detail-in-context lenses
