Patent ID: 7689012

Claim:
A finger sensing device comprising: a finger sensing area to receive a user's finger moved in a sliding motion; a sensor controller cooperating with said finger sensing area for collecting image data therefrom; an image processor; and a communications path for sending image data from said sensor controller to said image processor; at least one of said sensor controller and said image processor for performing the following steps (i) selecting a reference image data subset based upon reference image data, (ii) selecting a new image data subset, and (iii) comparing the new image data subset to the reference image data subset to develop a matching score, and, if the matching score is above a matching threshold, then not having new image data corresponding to the new image data subset sent over said data communications path, and, if the matching score is below the matching threshold, then having the new image data corresponding to the new image data subset sent over said data communications path.