Patent ID: 6333989
Filing Date: 2001-12-25
Classification: G06K

Abstract:
A method of imaging a fingerprint comprising the steps of:(i) moving a biological surface relative to a first sensing pad and a second sensing pad, each sensing pad including an array of capacitive sensing elements;(ii) capturing repeatedly and approximately simultaneously a first image and a second image to result in capturing of:a plurality of first images corresponding to different portions of the moving biological surface presented to the first sensing pad, anda plurality of second images corresponding to different portions of the moving biological surface presented to the second sensing pad;(iii) determining motion of the biological surface relative to the first sensing pad in dependence upon the captured pluralities of first and second images; and(iv) constructing an image of the biological surface from the captured plurality of first images and in dependence upon the determined motion, to form a composite image having an area greater than the area of a single captured image from the plurality of first images, absent a step of determining a speed of the biological surface.