Patent ID: 7567818

Claim:
A mobile device comprising: a memory, a processor, a display for showing content, wide-angle optics, and a navigation chip having a radiation sensor for detecting positions of the mobile device, the wide angle optics being disposed in front of the navigation chip and configured such that the navigation chip receives, through the wide angle optics, radiation from a large area outside of the mobile device, the mobile device being adapted to receive at least first and second images through the wide-angle lens and the navigation chip, wherein the first image indicates a first position of the mobile device at a first point in time and the second image indicates a second position of the mobile device at a second point in time, to store the first and second images as sets of luminosity values in the memory, to determine a change between the first position and the second position of the mobile device by applying a motion detection method to the first image and the second image, and to alter the content shown on the display in accordance with the determined change, wherein the motion detection method comprises superimposing the first image and the second image, calculating a best-fit offset between the first image and the second image, and calculating the change on the basis of the best-fit offset.