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Method and device for collecting fingerprints

A technology of fingerprint collection and fingerprint image, which is applied in printing image collection, acquisition/organization of fingerprints/palmprints, record carriers used by machines, etc. It can solve the problems of increased fingerprint misrecognition rate, increased damage sensing units, and damaged sensing units. , to achieve the effect of reducing the similarity

Active Publication Date: 2018-05-08
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the capacitive fingerprint sensor, due to the process problem, there will be a certain amount of damaged sensing units among the multiple sensing units included in the fingerprint sensor when leaving the factory.
At the same time, with the use of users, affected by static electricity or other external conditions, the number of damaged sensing units will also increase
The similarity of the fingerprint image values ​​collected by these damaged sensing units at different times is very high, resulting in an increase in the false recognition rate of fingerprints as the number of damaged sensing units increases.

Method used

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  • Method and device for collecting fingerprints
  • Method and device for collecting fingerprints

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] figure 1 It is a flowchart of a fingerprint collection method in Embodiment 1 of the present invention. This embodiment is applicable to the situation where a user wants to collect a fingerprint image. This method can be executed by a fingerprint collection device, and the device can be used as a smart terminal. A part is built into the smart terminal, which may be an electronic terminal such as a smart phone or a tablet computer. Such as figure 1 As shown, the method specifically includes the following steps:

[0019] Step 110, determining a damaged sensing unit among the plurality of sensing units included in the fingerprint sensor.

[0020] Wherein, the fingerprint sensor may be a capacitive fingerprint sensor. The working principle of the capacitive fingerprint sensor is as follows: on a "flat plate" integrated with thousands of semiconductor devices, the finger is attached to it and constitutes the other side of the capacitor. The actual distance of the contact...

Embodiment 2

[0029] This embodiment provides a fingerprint collection method on the basis of the first embodiment above. In this embodiment, setting the fingerprint image value collected by the damage sensing unit as a random image value may specifically include: acquiring the location information of the damage sensing unit; The fingerprint image value collected by the damage sensing unit is set as a random image value.

[0030] figure 2 It is a flowchart of a fingerprint collection method in Embodiment 2 of the present invention, as figure 2 As shown, the method provided in this embodiment may specifically include the following steps:

[0031] Step 210, determining a damaged sensing unit among the plurality of sensing units included in the fingerprint sensor.

[0032] Preferably, the determining a damaged sensing unit among the plurality of sensing units included in the fingerprint sensor includes: determining a sensing unit that has collected the same fingerprint image value multipl...

Embodiment 3

[0045] This embodiment provides a specific example of a fingerprint collection method based on the foregoing embodiments. image 3 It is a flowchart of a fingerprint collection method in Embodiment 3 of the present invention, as image 3 As shown, the method provided in this embodiment may specifically include the following steps:

[0046] Step 310, determining the sensing unit that has collected the same fingerprint image value multiple times as the damaged sensing unit of the fingerprint sensor.

[0047] In addition, for a fingerprint sensor with a damage sensing unit detection function, the damage sensing unit of the fingerprint sensor can also be determined through the damage sensing unit detection function of the fingerprint sensor.

[0048] Step 320 , when a fingerprint collection event is detected, use the multiple sensing units to collect fingerprint images, and set the fingerprint image values ​​collected by the damaged sensing units as random image values ​​to form ...

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Abstract

The invention discloses a fingerprint collection method and device. The fingerprint collection method includes: determining a damaged sensing unit in a plurality of sensing units included in a fingerprint sensor; when a fingerprint collection event is detected, using the plurality of sensing units to collect fingerprint images, and using the damaged sensing unit collected The fingerprint image value is set as a random image value to form a fingerprint image collected by the fingerprint sensor. The technical solutions of the embodiments of the present invention reduce the similarity of the fingerprint image values ​​collected by the damage sensing unit at different times, thereby reducing the false recognition rate of fingerprints.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of intelligent terminals, and in particular, to a method and device for collecting fingerprints. Background technique [0002] Fingerprints are textures formed by uneven skin on the surface of fingers. The texture features of fingerprints are unique and stable, so they are often used as the basis for identification. A fingerprint sensor is a sensor that identifies an identity through a fingerprint. [0003] As for the capacitive fingerprint sensor, due to the technical problem, there will be a certain amount of damaged sensing units in the plurality of sensing units included in the fingerprint sensor when it leaves the factory. At the same time, with the use of the user, the number of damaged sensing units will also increase due to the influence of static electricity or other external conditions. The similarity of the fingerprint image values ​​collected by these damaged sensing units...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00
CPCG06V40/1347G06V40/1306G06F18/00G06K19/0718
Inventor 张强王立中周海涛蒋奎贺威
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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