The disclosure relates to a computer implemented method and component defining a plurality of data structures, each data structure having a plurality of data elements. For example, the method may be initiated when an input identifying an item is received from a user. The individual images may be pre-stabilized by using the results of stabilizing a prior image in order to reduce the amount of processing necessary to stabilize a current image. The cancellation pin is biased by a return spring in the direction of the cancellation cam and in the direction of the sliding contact of the sliding-contact surface with the fixed member. The feature extraction unit extracts fingerprint feature data by applying the standard fingerprint width feature extraction process to a standard width fingerprint image and the narrow fingerprint width feature extraction process to a narrow width fingerprint image.