US 8,285,009 B2 · Fingerprint input apparatus

Abstract

A fingerprint input apparatus for providing a plurality of inputs while moving a finger to acquire a fingerprint image, the fingerprint input apparatus determining an intersection of the plurality of input partial fingerprint images to calculate a relative location between the plurality of partial fingerprint images on the basis of the intersection and outputting the calculated relative location with the plurality of partial fingerprint images to an external device. The intersection of the plurality of partial fingerprint images is obtained, for example, on the basis of a density distribution of dots constituting each of the image. The relative location is at least one of the moving direction, the moving distance, and the angle of rotation. Thereby, there is no movable part and thus it eliminates a need for providing the external device with software processing for calculating the relative location of the partial fingerprint images, thereby achieving downsizing and power saving of the apparatus.

Claims12

Dependent claims

A fingerprint input apparatus for inputting a plurality of partial fingerprint images constituting a fingerprint image through a plurality of input times while moving a finger to acquire the fingerprint image, said fingerprint input apparatus comprising a microcomputer, said microcomputer comprising:

an operation section configured to determine an intersection of the plurality of input partial fingerprint images, and to calculate a relative location between the plurality of partial fingerprint images on the basis of the intersection;
and
a communication section configured to output data of the relative location calculated by said operation section and to output the plurality of partial fingerprint images to an external device;
wherein said plurality of partial fingerprint images comprises a plurality of prior partial fingerprint images and a latest partial fingerprint image;
and
said operation section assumes that any one of the plurality of prior partial fingerprint images is an object of the calculation, and one or more remaining prior partial fingerprint images and the latest partial fingerprint image are reference images, and calculates a plurality of relative locations, the plurality of relative locations comprising a relative location between the object of the calculation and each of the reference images, and weights the plurality of relative locations.

3 more elements

Dependencies are inferred from the claim text.

Fingerprint input apparatus

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Fingerprint input apparatus

Life of this patent

Abstract

Claims12