Patent ID: 7403644

Claim:
An input device for processing and assembling a scan of a biometric image of a fingertip, said input device comprising: a housing; a scan head mounted to the housing; a platen moveably mounted to the housing for movement relative to the housing and the scan head by the fingertip between a first position and a second position, wherein the scan head captures scan lines depending on the time of capture as the platen is moved from the first position to the second position; an encoder target associated with the platen, said encoder target comprising a non-repeating set of patterns, wherein the scan head is configured to capture a scan line of the biometric image of the fingertip and a pattern of the encoder target in a single scan line capture; a biasing device configured to bias the platen into its first position; and an end of scan switch configured to be actuated when the platen is in the second position, wherein the actuation of the end of scan switch is configured to provide tactile feedback to the fingertip wherein the input device processes and assembles the scan of the biometric image from a plurality of scan lines captured by the scan head by ordering each of the captured scan lines as a function of the encoder target pattern included in each captured scan line, and wherein the input device does not include a particular captured scan line in the processed and assembled scan if the particular captured scan line has an encoder target pattern matching an encoder target pattern of a captured scan line previously included in the processed and assembled scan.