US 2020/0005018 A1Published application

Fingerprint sensing device and fingerprint sensing method

AssigneeGingy Technology Inc.

InventorsYi-Chung Lo, Shih-Ju Ho, Chih-I Cheng

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Abstract

A fingerprint sensing device includes a fingerprint sensor and a processor. The fingerprint sensor is configured to acquire a plurality of fingerprint reference frames. The processor is coupled to the fingerprint sensor. The processor is configured to superimpose the plurality of fingerprint reference frames. The processor analyzes the plurality of fingerprint reference frames to determine multiple first regions and multiple second regions of the plurality of fingerprint reference frames. The processor calculates multiple reference pixel values of the plurality of fingerprint reference frames according to multiple weight value functions to generate a superimposed fingerprint frame. The weight value functions corresponding to the first regions of the plurality of fingerprint reference frames are linearly changed.

Claims20

Dependent claims

A fingerprint sensing device, comprising:

a fingerprint sensor, configured to acquire a plurality of fingerprint reference frames;
and
a processor, coupled to the fingerprint sensor, configured to superimpose the fingerprint reference frames,
wherein the processor analyzes the fingerprint reference frames to determine a plurality of first regions and a plurality of second regions of the fingerprint reference frames, and the processor calculates a plurality of reference pixel values of the fingerprint reference frames according to a plurality of weight value functions to generate a superimposed fingerprint frame,
wherein the weight value functions corresponding to the first regions of the fingerprint reference frames are linearly changed,
wherein one of the weight value functions corresponding to a second region of one of the fingerprint reference frames has a maximum value, and the other weight value functions corresponding to the second regions of the other fingerprint reference frames have minimum values.

3 more elements

A fingerprint sensing method, adapted to a fingerprint sensing device, wherein the fingerprint sensing device comprises a fingerprint sensor and a processor, the fingerprint sensing method comprising:

acquiring a plurality of fingerprint reference frames by the fingerprint sensor;
analyzing the fingerprint reference frames to determine a plurality of first regions and a plurality of second regions of the fingerprint reference frames by the processor;
and
calculating a plurality of reference pixel values of the fingerprint reference frames according to a plurality of weight value functions by the processor to generate a superimposed fingerprint frame,
wherein the weight value functions corresponding to the first regions of the fingerprint reference frames are linearly changed,
wherein one of the weight value functions corresponding to a second region of one of the fingerprint reference frames has a maximum value, and the other weight value functions corresponding to the second regions of the other fingerprint reference frames have minimum values.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/275,288Filed 13 Feb 2019
Priority: TW 1071269272 Aug 2018
Published: 2 Jan 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

G06V 40/13
Fingerprints or palmprints: sensors therefor
G06V 40/1318
Sensors therefor: using electro-optical elements or layers, e.g. electroluminescent sensing
G06V 40/1347
Fingerprints or palmprints: preprocessing; Feature extraction
G06V 10/16
Image acquisition: using multiple overlapping images; Image stitching