WO2017156752A1

WO2017156752A1 - Fingerprint registration method, fingerprint identification system, and electronic equipment

Info

Publication number: WO2017156752A1
Application number: PCT/CN2016/076655
Authority: WO
Inventors: 李其昌
Original assignee: 深圳信炜科技有限公司
Priority date: 2016-03-17
Filing date: 2016-03-17
Publication date: 2017-09-21
Also published as: CN105814586B; CN105814586A

Abstract

A fingerprint registration method of a fingerprint identification system, a fingerprint identification system and electronic equipment. The fingerprint identification system comprises a pressing type fingerprint sensor, the pressing type fingerprint sensor comprising a plurality of sensing electrodes which are used for sensing the fingerprint of a user. The fingerprint registration method comprises: step a, reminding a user to place a finger on the pressing type fingerprint sensor; step b, after the finger of the user is placed on the pressing type fingerprint sensor, reminding the user to slide their finger; step c,: when the finger of the user slides over the plurality of sensing electrodes, collecting a plurality of fingerprint images obtained by means of the pressing-type fingerprint sensor; and step d, acquiring the plurality of fingerprint images which are collected by the pressing-type fingerprint sensor, to perform fingerprint template registration according to the plurality of acquired fingerprint images or the characteristic values of the plurality of fingerprint images.

Description

Fingerprint registration method, fingerprint identification system, and electronic device

[0001] Technical Field

[0002] The present invention relates to the field of fingerprint sensing technologies, and in particular, to a fingerprint registration method, a fingerprint identification system, and an electronic device.

BACKGROUND

[0004] With the development of security technology, fingerprint recognition has gradually gained the attention of everyone, and its application fields are becoming wider and wider.

At present, the fingerprint recognition system of an electronic device requires the user to first perform fingerprint registration to form a fingerprint template. After the fingerprint registration is successful, when the user uses the fingerprint to unlock, the fingerprint recognition system scans the fingerprint currently input by the user and compares it with the previously registered fingerprint template. When the comparison is successful, the fingerprint is successfully unlocked, otherwise the fingerprint is unlocked. failure.

[0005] At present, the fingerprint recognition system of an electronic device generally adopts a push type fingerprint sensor. For example, a mobile terminal such as an iPhone 5s, an iPhone 6 or an iPhone 6s of the US Apple Corporation adopts a push type fingerprint sensor, and after performing fingerprint registration, the fingerprint identification is performed. The system only acquires one fingerprint image for the user's touch operation on the push type fingerprint sensor, and the user needs to touch the operation ten or even twenty times.

The fingerprint identification system can obtain enough fingerprint images to be stitched into the fingerprint template needed for subsequent fingerprint verification. Such a registration process requires a user to perform fingerprint registration for a large number of days. Therefore, the electronic device having the fingerprint recognition system is not sufficiently user-friendly.

SUMMARY OF THE INVENTION

In order to solve the above technical problem, the present invention provides a short fingerprint registration method, a fingerprint identification system, and an electronic device.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] A fingerprint registration method for a fingerprint identification system, the fingerprint recognition system including a push type fingerprint sensor

The push-type fingerprint sensor includes a plurality of sensing electrodes, and the plurality of sensing electrodes are used to sense a fingerprint of a user. The fingerprint registration method includes:

[0010] Step a: prompting the user to place a finger on the pressed fingerprint sensor;

[0011] Step b: prompting the user to slide the finger after the user's finger is placed on the push type fingerprint sensor [0012] Step c: when the user's finger slides over the plurality of sensing electrodes, the plurality of fingerprint images acquired by the push-type fingerprint sensor;

[0013] Step d: acquiring a plurality of fingerprint images acquired by the pressed fingerprint sensor, and performing fingerprint template registration according to the acquired feature values of the plurality of fingerprint images or the fingerprint images.

[0014] Optionally, the fingerprint registration method further includes: between step a and step b:

[0015] Step e: determining whether the finger is stably placed on the push type fingerprint sensor, when it is determined that the finger is stably placed on the push type fingerprint sensor, step b is performed, otherwise, step f is performed;

[0016] Step f: Prompt the user not to move the finger or cover the push fingerprint sensor.

[0017] Optionally, the fingerprint registration method further includes: between step a and step b:

[0018] Step e: determining whether the finger is stably placed on the pressing fingerprint sensor and the area of the finger covering the pressing fingerprint sensor is not less than a predetermined percentage of the area of the pressing fingerprint sensor, and determining that the finger is stably placed on the pressing On the fingerprint sensor, and the area of the finger covering the pressed fingerprint sensor is not less than a predetermined percentage of the area of the fingerprint sensor, step b is performed; when it is determined that the finger is not stably placed on the pressed fingerprint sensor, step f is performed; When it is determined that the finger is stably placed on the push type fingerprint sensor, and the area of the finger covering the pressed type fingerprint sensor is smaller than a predetermined percentage of the area of the fingerprint sensor, step g is performed;

[0019] Step f: prompting the user not to move the finger or cover the push type fingerprint sensor;

[0020] Step g: prompting the user to cover the area of the push-type fingerprint sensor to at least reach the predetermined percentage or completely cover the push-type fingerprint sensor.

[0021] Optionally, after the user's finger is placed on the push-type fingerprint sensor, the fingerprint is collected by the push-type fingerprint sensor, and the data is determined according to whether the data between the adjacent fingerprint images collected by the push-type fingerprint sensor is the same. Whether the finger is stably placed on the push type fingerprint sensor.

[0022] Optionally, the fingerprint registration method further includes after step d:

[0023] Step h: screening the obtained plurality of fingerprint images; and

[0024] Step I: storing the feature values of the filtered fingerprint image or the fingerprint image into the registration template.

[0025] Optionally, the fingerprint registration method further includes a step J: determining whether the information amount of the fingerprint image obtained by the step h is sufficient, if the registration is successful, the registration is successful, otherwise the registration is continued or re-injected. Booklet

[0026] wherein the information amount includes whether the number of the fingerprint images after the screening is greater than a predetermined number of sheets or/and whether the area of the fingerprint image obtained after the spliced fingerprint image is spliced is greater than a predetermined area.

[0027] Optionally, the method for screening the obtained multiple fingerprint images in step h is:

[0028] calculating, according to the acquired multiple fingerprint images, a distance that the user's finger slides on the pressing fingerprint sensor, and performing screening of the fingerprint image according to the sliding distance; or

[0029] screening the fingerprint image according to the time the finger slides on the push fingerprint sensor; or

[0030] screening the fingerprint image according to the distance the finger slides on the push fingerprint sensor and the sliding time; or

[0031] screening the fingerprint image according to the overlapping area of the acquired adjacent fingerprint images.

[0032] Optionally, step c includes:

[0033] determining whether the finger is placed on the push type fingerprint sensor, if it is determined that the finger is placed on the push type fingerprint sensor, the fingerprint image is collected, and if it is determined that the finger is away from the push type fingerprint sensor, the fingerprint image collection is stopped.

[0034] Optionally, step c further includes:

[0035] It is judged whether the finger placed at the same position of the push type fingerprint sensor exceeds a predetermined time, and if the predetermined time is exceeded, the user is prompted to slide the finger.

[0036] Optionally, step c further includes:

[0037] Calculating the sliding speed of the finger, prompting the user whether the finger is sliding too fast or too slow according to the calculated speed.

[0038] Optionally, the predetermined percentage is any value in the range of 40% to 100%.

[0039] Optionally, in step c, the sensing electrodes on the push fingerprint sensor perform fingerprint sensing on the finger that slides thereon.

[0040] Optionally, the filtered fingerprint image includes a plurality of images, and the adjacent fingerprint images of the plurality of fingerprint images are partially overlapped, or the plurality of fingerprint images are filtered. Whether there is overlap between adjacent fingerprint images, or there is overlap between partially adjacent fingerprint images in the plurality of fingerprint images after screening, and there is no overlap between some adjacent fingerprint images.

[0041] A fingerprint identification system includes a push type fingerprint sensor and a fingerprint processing device; the push type fingerprint sensor includes a plurality of sensing electrodes and an acquisition module, and the plurality of sensing electrodes are used to sense a user's finger Fingerprinting device includes a prompting module and an obtaining module; when the fingerprinting system works in a fingerprint registration mode:

[0042] the prompting module is configured to prompt the user to place a finger on the pressed fingerprint sensor, and prompt the user to slide the finger after the user's finger is placed on the pressed fingerprint sensor;

[0043] the acquisition module is configured to acquire a plurality of fingerprint images obtained by sliding a user's finger over the plurality of sensing electrodes;

[0044] The acquiring module is configured to acquire a plurality of fingerprint images collected by the pressed fingerprint sensor, and perform fingerprint template registration according to the obtained feature values of the plurality of fingerprint images or the fingerprint images.

[0045] Optionally, the push-type fingerprint sensor further includes a determining module, wherein the determining module is configured to determine whether the finger is stably placed on the pressed fingerprint sensor, and when determining that the finger is stably placed on the sensing electrode吋, the prompting module prompts the user to slide the finger. Otherwise, the prompting module prompts the user not to move the finger or cover the pressed fingerprint sensor.

[0046] Optionally, the push-type fingerprint sensor further includes a determining module, wherein the determining module is configured to determine whether a finger is stably placed on the pressed fingerprint sensor and whether an area of the finger covering the pressed fingerprint sensor is not less than a pressing a predetermined percentage of the area of the fingerprint sensor, when it is determined that the finger is stably placed on the push type fingerprint sensor and the area of the finger covering the push type fingerprint sensor is not less than a predetermined percentage of the area of the fingerprint sensor, the prompting module prompts the user to slide the finger; When it is judged that the finger is not stably placed on the pressing type fingerprint sensor, the prompting module prompts the user not to move the finger or cover the pressing type fingerprint sensor; when it is judged that the finger is stably placed on the pressing type fingerprint sensor, the finger covers the pressing type The area of the fingerprint sensor is less than a predetermined percentage of the area of the fingerprint sensor, and the prompting module prompts the user to cover the area of the push type fingerprint sensor to at least the predetermined percentage or completely cover the pressed fingerprint sensor.

[0047] Optionally, after the user's finger is placed on the push-type fingerprint sensor, the fingerprint is collected by the collecting module, and the determining module determines whether the finger is based on whether the data between the adjacent fingerprint images collected by the collecting module is the same. Stable on the press-type fingerprint sensor.

[0048] Optionally, the fingerprint processing device further includes a screening module and a storage module, when the fingerprint recognition system works in the fingerprint registration mode:

[0049] the screening module is configured to filter the obtained multiple fingerprint images; and [0050] The storage module is configured to store the feature value of the filtered fingerprint image or the fingerprint image into the registration template.

[0051] Optionally, the fingerprint processing apparatus further includes a determining module, configured to determine whether the information amount of the fingerprint image obtained by the screening module is sufficient, and if yes, prompting the registration to succeed, otherwise prompting to continue to register or re-register;

[0052] wherein the information amount includes whether the number of the fingerprint images after the screening is greater than a predetermined number of sheets or / and whether the area of the fingerprint image obtained after the spliced fingerprint image is spliced is greater than a predetermined area.

[0053] Optionally, the screening module is based on:

[0054] screening the fingerprint image by the distance the finger slides on the pressing fingerprint sensor; or

[0055] the finger is slid on the pressing fingerprint sensor to perform screening of the fingerprint image; or

[0056] screening the finger image on the sliding distance of the finger on the pressing fingerprint sensor and the sliding time; or

[0057] The area where the obtained adjacent fingerprint images overlap is obtained to perform screening of the fingerprint image.

[0058] Optionally, when the fingerprint identification system works in the fingerprint registration mode, the acquiring module of the pressing fingerprint sensor further determines whether the finger is placed on the pressing fingerprint sensor in the process of acquiring the fingerprint image. If it is judged that the finger is placed on the push type fingerprint sensor, the fingerprint image is collected, and if it is determined that the finger is away from the push type fingerprint sensor, the fingerprint image collection is stopped.

[0059] Optionally, when the fingerprint identification system works in the fingerprint registration mode, the acquiring module of the pressing fingerprint sensor further determines that the finger is placed in the same shape of the pressing fingerprint sensor in the process of acquiring the fingerprint image. Whether the time of the position exceeds the predetermined time, if the predetermined time is exceeded, the prompting module prompts the user to slide the finger.

[0060] Optionally, the fingerprint processing device further calculates a module, configured to calculate a sliding speed of the finger. When the fingerprint recognition system works in the fingerprint registration mode, the prompting module prompts the user whether the finger has swept according to the speed calculated by the computing module. Fast or too slow.

[0061] Optionally, the predetermined percentage is any value in the range of 40% to 100%.

[0062] Optionally, when the fingerprint recognition system operates in the fingerprint registration mode, the sensing electrodes on the push fingerprint sensor perform fingerprint sensing on the fingers that are slid over them.

[0063] Optionally, the fingerprint image after the filtering by the screening module includes multiple, and the adjacent fingerprint images of the plurality of fingerprint images after the screening partially overlap, or the plurality of filtered images Fingerprint image phase Whether there is overlap between adjacent fingerprint images, or there is overlap between partially adjacent fingerprint images in the plurality of fingerprint images after screening, and there is no overlap between some adjacent fingerprint images.

An electronic device comprising the fingerprint recognition system of any of the above.

[0065] The fingerprint registration method, the fingerprint identification system, and the electronic device of the present application acquire multiple fingerprint images when the user slides over the plurality of sensing electrodes of the push fingerprint sensor, that is, the sliding method is adopted on the push fingerprint sensor. Obtaining multiple fingerprint images instead of one fingerprint image as in the prior art, therefore, the user spends less time in the process of fingerprint registration.

[0066] While the invention has been described with respect to the various embodiments of the embodiments of the invention The technicians are obvious. It will be appreciated that the invention may be modified in various obvious forms, and all modifications may be made without departing from the spirit and scope of the invention. The drawings and detailed description are to be regarded as illustrative rather

BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Features and advantages of the present invention will become more apparent from the detailed description of exemplary embodiments thereof

1 is a schematic structural view of an embodiment of an electronic device according to the present invention.

2 is a schematic structural diagram of a fingerprint identification system according to the present invention.

3 is a flowchart of a fingerprint registration method for a fingerprint recognition system in a fingerprint registration mode according to the present invention. [0072] FIG. 4 is a flowchart of a fingerprint verification method for a fingerprint recognition system in a fingerprint verification mode according to the present invention. DETAILED DESCRIPTION

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be embodied in a variety of forms, and should not be construed as being limited to the embodiments set forth herein. To those skilled in the art.

Furthermore, the described features, structures may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a description of embodiments of the invention. Understand. However, those skilled in the art will appreciate that the technical solution of the present invention may be practiced without one or more of the specific details or other structures, components, and the like. In other instances, well-known structures or operations are not shown or described in detail to avoid obscuring the invention.

Further, in the description of the present invention, it is to be understood that "multiple sheets" include two or more, unless the invention specifically dictates otherwise. In addition, the words "first" and "second" appearing in the names of the components are not intended to limit the order in which the components appear, but to facilitate the naming of the components and to clearly distinguish the components, so that the description is more concise.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of an embodiment of an electronic device according to the present invention. The electronic device 1 is, for example, a portable electronic product or a home-based electronic product. Among them, portable electronic products are various mobile terminals, such as mobile phones, tablets, notebook computers, and wearable products; home-based electronic products such as smart door locks, televisions, refrigerators, desktop computers And other types of electronic products. In the embodiment, the electronic device 1 is described by taking a mobile phone as an example. However, as described above, the electronic device 1 is not limited to a mobile phone, and is another suitable electronic device, or even a mobile phone. The position of the fingerprint recognition system 100 is not limited to the position shown in FIG. 2, and may be other suitable positions, for example, not limited to the front side of the electronic device 1, and may also be set in the non-display area. The inside or back of the electronic device 1, the side, the display area, and the like.

[0078] The electronic device 1 includes the fingerprint recognition system 100. The fingerprint identification system 100 is configured to perform fingerprint sensing, and the electronic device 1 controls whether to perform a corresponding function according to the fingerprint information sensed by the fingerprint identification system 100. The corresponding functions include, for example, unwinding, paying, launching an application (e.g., WeChat, etc.), logging in to a folder, and the like.

[0079] The fingerprint identification system 100 mainly includes three working modes, namely, a fingerprint registration mode, a fingerprint verification mode, and a fingerprint deregistration mode, and the three working modes may also be simply referred to as a registration mode, an authentication mode, and a logout mode. The fingerprint registration mode is used to add a fingerprint of the new user, and store the collected feature value of the fingerprint image or the fingerprint image of the new user into the registration template or the fingerprint database. The fingerprint authentication mode verifies whether the user fingerprint is a previously registered fingerprint by matching the feature value of the fingerprint image or the fingerprint image of the user with the feature value of the fingerprint image or the fingerprint image stored in the fingerprint database. The fingerprint logout mode is used to delete the feature values of the registered fingerprint image or fingerprint image from the fingerprint database. Please refer to FIG. 2. FIG. 2 is a schematic structural diagram of a fingerprint identification system according to the present invention. The fingerprint recognition system 100 includes a push fingerprint sensor 10 and a fingerprint processing device 20. The push type fingerprint sensor 10 is connected to the fingerprint processing device 20.

[0081] The push type fingerprint sensor 10 includes a plurality of sensing electrodes 111 and an acquisition module 13. The plurality of sensing electrodes 111 are arranged in an array to form the sensing electrode array 11. However, the plurality of sensing electrodes 11 may also be arranged in a non-array manner. The plurality of sensing electrodes 111 are configured to receive a fingerprint input of a user and sense a fingerprint of the user. The push type fingerprint sensor 10 is, for example, a capacitive fingerprint sensor, an optical fingerprint sensor, an ultrasonic fingerprint sensor, or the like. Taking a capacitive fingerprint sensor as an example, the plurality of sensing electrodes 111 are used to form capacitances respectively with the ridges and valleys of the fingerprint of the user's finger, and the capacitance formed by the ridges, valleys, and the sensing electrodes 111 is different. The fingerprint sensor correspondingly scans to obtain a fingerprint image. The working principle of the fingerprint sensor with the sensing electrode array, such as the optical fingerprint sensor and the ultrasonic fingerprint sensor, will not be described here.

[0082] In the fingerprint registration mode, the acquisition module 13 is configured to acquire a plurality of fingerprint images obtained by the user's finger sliding over the plurality of sensing electrodes 11 1 . Specifically, the acquisition module 13 provides a scan signal to the sensing electrode 111, drives the sensing electrode 111 to perform fingerprint sensing, and obtains fingerprint image information according to the sensing signal output by the sensing electrode 111. The area in which the sensing electrode array 11 is located is a scanning area. In other words, the sensing electrode 111 on the push type fingerprint sensor 10 performs fingerprint sensing on the finger that has slid over it. Therefore, the fingerprint recognition system 100 of the present application can collect the finger when it is slid over the pressed fingerprint sensor 10, compared to selecting only the partial scan area on the push fingerprint sensor 10 to collect the fingerprint image in the fingerprint registration mode. The number of fingerprint images is more, which makes it more efficient and saves fingerprint registration.

[0083] In the verification mode, the acquisition module 13 of the push fingerprint sensor 10 is used to pair the sensing electrode array

The finger fingerprint touched or pressed on 11 is scanned so that the fingerprint processing device 20 acquires the fingerprint image for verification. In the verification mode, the push-type fingerprint sensor 10 acquires a fingerprint image for each touch or press of the user's finger. Wherein, the touch includes, for example, a sliding operation.

[0084] The fingerprint processing device 20 includes an acquisition module 21 and a prompting module 27. In the fingerprint registration mode, the prompting module 27 is configured to prompt the user to place a finger on the push-type fingerprint sensor 10, and prompt the user to slide the finger after the user's finger is placed on the push-type fingerprint sensor 10. The acquisition module 2 1 for acquiring a plurality of fingerprint images collected by the pressed fingerprint sensor 10 to perform fingerprint template registration according to the obtained feature values of the plurality of fingerprint images or fingerprint images.

The fingerprint recognition system 100 of the present application can obtain more than one fingerprint at a time by adopting a sliding fingerprint collection method on the push type fingerprint sensor 10, compared with the manner in which the fingerprint fingerprint sensor collects one fingerprint image at a time. A fingerprint image is printed so that fingerprint registration can be completed by one or several swipes, thereby reducing registration time.

Referring to FIG. 2 again, in still another embodiment, the push fingerprint sensor 10 further includes a determination module 15. The determining module 15 is configured to determine whether the finger is stably placed on the pressed fingerprint sensor 10, and when it is determined that the finger is stably placed on the sensing electrode 111, the prompting module 27 prompts the user to slide the finger; otherwise, prompting Module 27 prompts the user not to move the finger or cover the push-type fingerprint sensor 10.

[0087] However, in other embodiments, the determining module 15 determines whether the finger is placed on the push-type fingerprint sensor 10, and further determines whether the area of the finger covering the push-type fingerprint sensor 10 is not Less than a predetermined percentage of the area of the push-type fingerprint sensor 10, when it is determined that the finger is stably placed on the push-type fingerprint sensor 10 and the area of the finger covering the push-type fingerprint sensor 10 is not less than a predetermined percentage of the area of the fingerprint sensor 10, the prompting module 27 prompts the user to slide the finger; when it is judged that the finger is not stably placed on the push type fingerprint sensor 10, the prompting module 27 prompts the user not to move the finger or cover the pressed fingerprint sensor 10; when it is judged that the finger is stably placed on the pressing On the fingerprint sensor 10, the area of the finger-covered push-type fingerprint sensor 10 is smaller than a predetermined percentage of the area of the push-type fingerprint sensor 10, and the prompting module 27 prompts the user to cover the area of the push-type fingerprint sensor 10 to at least the predetermined percentage. Or full coverage Pressure fingerprint sensor 10.

[0088] The percentage is, for example, a value in the range of 40% to 100%, specifically, for example, 50%, and of course, other suitable percentages such as 40%, or 60% may be set according to requirements.

[0089] Specifically, after the user's finger is placed on the push-type fingerprint sensor 10, the fingerprint is collected by the acquisition module 13, and the data of the adjacent fingerprint image collected by the determination module 15 according to the acquisition module 13 is the same. It is determined whether the finger is stably placed on the push type fingerprint sensor 10. However, the present application is not limited thereto, and the judging module 15 may further determine whether the finger is stably placed on the push type fingerprint sensor 10 according to other manners, for example, the speed of movement of the finger, and the like. [0090] In the above embodiment, the determination module 15 is provided in the push type fingerprint sensor 10. However, in other embodiments, the determination module 15 may also be set. In the fingerprint processing device 20.

Referring to FIG. 2 again, in still another embodiment, the fingerprint processing apparatus 20 may further include a screening module 23 and a storage module 25. In the fingerprint registration mode, the screening module 23 is configured to filter the obtained multiple fingerprint images. The storage module 25 is configured to store the feature values of the filtered fingerprint image or the fingerprint image into a registration template or a fingerprint database.

In another embodiment, the fingerprint processing apparatus 20 may further include a determining module 24, configured to determine whether the information amount of the fingerprint image obtained by the screening module 23 is sufficient, and if yes, the fingerprint registration is successful, otherwise Prompt to continue registering or re-registering. The information amount includes whether the number of the fingerprint images after the screening is greater than a predetermined number of sheets or / and whether the area of the fingerprint image obtained after the spliced fingerprint image is spliced is greater than a predetermined area.

[0093] Since the fingerprint processing device 20 filters the acquired multiple fingerprint images and stores the feature values of the filtered fingerprint image or the fingerprint image to the registration template or the fingerprint database, the registration step is also relatively simple, thereby further shortening Fingerprint registration.

[0094] The fingerprint image after the screening module 23 is filtered, for example, includes a plurality of sheets. However, the fingerprint image after screening by the screening module 23 may also be one.

[0095] For example, there is a partial overlap between adjacent fingerprint images among the plurality of fingerprint images after the screening. However, there is no overlap between adjacent fingerprint images. There may also be overlap between partial fingerprint images between adjacent fingerprint images, and there is no overlap between some fingerprint images.

[0096] The screening module 23 is based on:

[0097] screening of the fingerprint image according to the distance the finger slides on the push-type fingerprint sensor 10; or [0098] screening of the fingerprint image by the finger sliding on the push-type fingerprint sensor 10; or

[0099] screening of the fingerprint image by the distance the finger slides on the push-type fingerprint sensor 10 and the sliding time; or

[0100] The area where the obtained adjacent fingerprint images overlap is obtained to perform screening of the fingerprint image.

[0101] wherein the fingerprint image is screened according to the distance the finger slides on the push-type fingerprint sensor 10, for example, one fingerprint image may be filtered out every predetermined interval. [0102] The fingerprint image is screened according to the time during which the finger slides on the push type fingerprint sensor 10. For example, one fingerprint image may be filtered out every predetermined inter-turn interval.

[0103] The fingerprint image is screened according to the distance that the finger slides on the push-type fingerprint sensor 10 and the sliding time. Since the distance between the finger sliding on the push-type fingerprint sensor 10 and the sliding time is known, the finger can be determined. The speed of sliding on the push type fingerprint sensor 10, therefore, the screening fingerprint image can be selected, for example, based on the speed of the user's sliding.

[0104] screening the fingerprint image according to the overlapping area of the obtained adjacent fingerprint images, for example, the first fingerprint image overlaps with the second fingerprint image, and the second fingerprint image overlaps with the third fingerprint image. When the area of the first fingerprint image and the second fingerprint image overlaps the area where the first fingerprint image overlaps with the third fingerprint image, and the overlapping areas exceed the predetermined value, the second fingerprint image is discarded. . Here, as an example, the present invention does not particularly limit the area in which the fingerprint images overlap and the number of discarded sheets, and may be set correspondingly depending on, for example, the product brand.

[0105] It should be noted that, in this embodiment, the screening module 23 first stores the fingerprint image obtained by the screening into the storage module 25, and then determines whether the information amount of the filtered fingerprint image is sufficient, if sufficient, The fingerprint image in the storage module 25, otherwise, for example, the stored fingerprint image can be erased.

[0106] However, in other embodiments, the screening module 23 may first determine whether the amount of information of the filtered fingerprint image is sufficient. If sufficient, the fingerprint image is stored in the storage module. Otherwise, the screening is discarded. Fingerprint image. In addition, the screening module 23 may also store the filtered fingerprint image while determining whether the amount of information of the filtered fingerprint image is sufficient.

[0107] In still another embodiment, when the fingerprint recognition system 100 operates in the fingerprint registration mode, the acquisition module 13 determines, in the process of acquiring the fingerprint image, the determination module 13 of the push fingerprint sensor 10 further determines whether the finger is It is placed on the push type fingerprint sensor 10. If it is judged that the finger is placed on the push type fingerprint sensor 10, fingerprint image acquisition is performed, and if it is judged that the finger is away from the push type fingerprint sensor 10, the fingerprint image collection is stopped.

[0108] In still another embodiment, when the fingerprint recognition system 100 is operating in the fingerprint registration mode, the acquisition module 13 in the process of acquiring the fingerprint image, the determination module 15 of the push fingerprint sensor 10 further determines the finger placement. Whether the time between the same position of the push type fingerprint sensor 10 exceeds a predetermined time interval, and if the predetermined time interval is exceeded, the prompting module 27 prompts the user to slide the finger. [0109] In still another embodiment, the fingerprint processing apparatus may further calculate a module 28 for calculating a sliding speed of the finger. When the fingerprint recognition system 100 operates in the fingerprint registration mode, the prompting module 27 calculates according to the calculating module 28. Speed to alert the user if the finger is sliding too fast or too slow. The distance of the sliding is calculated, for example, by the calculation module 28 according to the multiple fingerprint images acquired by the acquisition module 21 .

[0110] In the verification mode, the acquisition module 21 is further configured to acquire a fingerprint image scanned by the push fingerprint sensor 10 when the user's finger touches or presses the push-type fingerprint sensor 10 . In this case, the acquisition module 21 acquires, for example, a fingerprint image for each touch operation by the user.

[0111] The fingerprint processing device 20 is further configured to compare whether the feature value of the fingerprint image or the fingerprint image obtained in the verification mode and the feature value of the fingerprint image or the fingerprint image in the registration template stored by the storage module 25 are compared. The predetermined condition is met, and if it is satisfied, the authentication is confirmed to pass, otherwise, the identity verification fails.

[0112] The fingerprint identification system 100 of the present application collects a fingerprint image by sliding, so that the user can complete the fingerprint registration by sliding the fingerprint fingerprint sensor 10 once or several times, thereby shortening the fingerprint registration time. In addition, since the present application filters the acquired fingerprint image after registering the fingerprint template, and stores the feature value of the filtered fingerprint image or the fingerprint image into the registration template, thereby further shortening the fingerprint registration time, the fingerprint identification system 100 is caused. More humane.

Please refer to FIG. 3. FIG. 3 is a flowchart of a method for registering a fingerprint of a fingerprint identification system in a registration mode according to the present invention. The fingerprint recognition system is, for example, the fingerprint recognition system 100 shown in FIG. The fingerprint registration method includes:

[0114] Step a: prompting the user to place a finger on the push type fingerprint sensor 10;

[0115] Step b: prompting the user to slide the finger after the user's finger is placed on the push type fingerprint sensor 10;

[0116] Step c: when the user's finger slides over the plurality of sensing electrodes 111, the plurality of fingerprint images acquired by the push-type fingerprint sensor 10;

[0117] Step d: Acquire a plurality of fingerprint images collected by the pressed fingerprint sensor 10 to perform fingerprint template registration according to the obtained feature values of the plurality of fingerprint images or the fingerprint images.

[0118] Compared with the manner in which the push fingerprint sensor in the fingerprint registration method of the prior art collects one fingerprint image each time, the fingerprint registration method of the present application adopts sliding acquisition on the push fingerprint sensor 10 The fingerprint method can obtain multiple fingerprint images at a time, so that fingerprint registration can be completed by one or several slides, thereby reducing the registration time.

[0119] In still another embodiment, the fingerprint registration method further includes: between steps a and b: [0120] Step e: determining whether the finger is stably placed on the push fingerprint sensor 10, when determining After the finger is stably placed on the push type fingerprint sensor 10, step b is performed, otherwise, step f is performed;

[0121] Step f: Prompt the user not to move the finger or cover the push type fingerprint sensor 10.

[0122] Alternatively, the fingerprint registration method further includes: between step a and step b:

[0123] Step e: determining whether the finger is stably placed on the push-type fingerprint sensor 10 and the area of the finger covering the push-type fingerprint sensor 10 is not less than a predetermined percentage of the area of the push-type fingerprint sensor 10, when it is determined that the finger is stable After being placed on the push type fingerprint sensor 10 and the area of the finger covering the push type fingerprint sensor 10 is not less than a predetermined percentage 面积 of the area of the fingerprint sensor 10, step b is performed; when it is determined that the finger is not stably placed on the push type fingerprint sensor 10吋, step f is performed; when it is determined that the finger is stably placed on the push-type fingerprint sensor 10, the area of the finger-covered push-type fingerprint sensor 10 is less than a predetermined percentage of the area of the push-type fingerprint sensor 10, step g is performed;

[0124] Step f: prompting the user not to move the finger or cover the push-type fingerprint sensor 10;

[0125] Step g: prompting the user to cover the area of the push-type fingerprint sensor 10 to at least the predetermined percentage or completely cover the push-type fingerprint sensor.

Wherein the predetermined percentage is any value in the range of 40% to 100%. For example, the predetermined percentage is 40%, 50%, 60%, 100%, and the like.

[0127] Specifically, after the user's finger is placed on the push-type fingerprint sensor 10, the fingerprint is collected by the push-type fingerprint sensor 10, and the data between the adjacent fingerprint images collected by the push-type fingerprint sensor 10 is the same. It is determined whether the finger is stably placed on the push type fingerprint sensor 10. However, determining whether the finger is stably placed on the push type fingerprint sensor 10 is not limited to the manner described herein, and may be other implementations such as the moving speed of the finger and the like.

[0128] In still another embodiment, the fingerprint registration method further includes after step d:

[0129] Step h: screening the obtained plurality of fingerprint images; and

[0130] Step I: storing the feature values of the filtered fingerprint image or the fingerprint image into a registration template or a fingerprint database. [0131] In still another embodiment, the fingerprint registration method further includes the step J: determining whether the information amount of the fingerprint image obtained by the step h is sufficient, if the registration is successful, the registration is successful, otherwise the registration is continued or re-registered. . The information amount includes whether the number of the fingerprint images after the screening is greater than a predetermined number of sheets or/and whether the area of the fingerprint image after the spliced fingerprint image is spliced is greater than a predetermined area.

[0132] Because the fingerprint registration method filters the acquired multiple fingerprint images, and stores the feature values of the filtered fingerprint image or the fingerprint image to the registration template or the fingerprint database, the registration step is also relatively simple, thereby further shortening the fingerprint. Registered in the daytime.

[0133] The fingerprint image filtered by the step h includes a plurality of fingerprints, and the adjacent fingerprint images of the plurality of fingerprint images after the screening partially overlap, or the plurality of fingerprint images after the screening Whether there is overlap between adjacent fingerprint images, or there is overlap between partially adjacent fingerprint images in the plurality of fingerprint images after screening, and there is no overlap between some adjacent fingerprint images.

[0134] The method for screening the obtained multiple fingerprint images in step h is:

[0135] calculating, according to the obtained plurality of fingerprint images, a distance that the user's finger slides on the push-type fingerprint sensor 10, and performing screening of the fingerprint image according to the sliding distance; or

[0136] screening of the fingerprint image according to the time during which the finger slides on the push-type fingerprint sensor 10; or [0137] screening of the fingerprint image according to the distance the finger slides on the push-type fingerprint sensor 10 and the sliding time ; or

[0138] Screening of the fingerprint image is performed according to the overlapping area of the acquired adjacent fingerprint images.

[0139] wherein the fingerprint image is screened according to the distance the finger slides on the push fingerprint sensor 10, for example, a fingerprint image may be filtered out every predetermined interval.

[0140] The fingerprint image is screened according to the time during which the finger slides on the push type fingerprint sensor 10. For example, one fingerprint image can be filtered out every predetermined inter-turn interval.

[0141] The fingerprint image is screened according to the distance the finger slides on the push type fingerprint sensor 10 and the sliding time. Since the distance between the finger sliding on the push type fingerprint sensor 10 and the sliding time is known, the finger can be determined. The speed of sliding on the push type fingerprint sensor 10, therefore, the screening fingerprint image can be selected, for example, based on the speed of the user's sliding.

[0142] performing screening of the fingerprint image according to the overlapping area of the obtained adjacent fingerprint images, for example, the first fingerprint image overlaps with the second fingerprint image, and the second fingerprint image overlaps with the third fingerprint image. When the area of the first fingerprint image and the second fingerprint image overlap is larger than the area where the first fingerprint image overlaps with the third fingerprint image, and the overlapping areas exceed the predetermined value, the second fingerprint is discarded. image. Here, as an example, the area in which the fingerprint image overlaps and the number of discarded sheets are not particularly limited, and may be set correspondingly depending on, for example, the product brand.

[0143] It should be noted that, in this embodiment, step 1 first stores the fingerprint image filtered in step h into the fingerprint registration template, and then determines whether the information amount of the filtered fingerprint image is sufficient, if sufficient, The stored fingerprint image is retained, otherwise, for example, the stored fingerprint image can be erased.

[0144] However, in other embodiments, step J may first determine whether the amount of information of the filtered fingerprint image is sufficient. If sufficient, step I is performed; otherwise, the filtered fingerprint image is discarded. Further, in step J, it is judged whether or not the amount of information of the filtered fingerprint image is sufficient, and step I can also store the filtered fingerprint image.

[0145] In still another embodiment, step c further includes:

[0146] It is judged whether the finger is placed on the push type fingerprint sensor 10. If it is judged that the finger is placed on the push type fingerprint sensor 10, fingerprint image acquisition is performed, and if it is judged that the finger is away from the push type fingerprint sensor 10, the fingerprint image collection is stopped.

[0147] In still another embodiment, step c further includes:

[0148] It is judged whether or not the finger placed at the same position of the push type fingerprint sensor 10 exceeds a predetermined time, and if the predetermined time is exceeded, the user is prompted to slide the finger.

[0149] In still another embodiment, step c further includes:

[0150] Calculate the sliding speed of the finger, and prompt the user whether the finger slides too fast or too slow according to the calculated speed.

[0151] In still another embodiment, in step c, the sensing electrode 111 on the push-type fingerprint sensor 10 performs fingerprint sensing on the finger that has slid over it.

It should be noted that the content suggested by the prompting module 27 or the content of the user in the fingerprint registration method may be adjusted according to requirements, and the content of the prompt described in the present application is not limited, as long as the idea is the same.

, all fall within the scope of protection of this application.

[0153] Since the fingerprint registration method acquires a fingerprint image by the sliding fingerprint sensor 10 by sliding, the registration time can be reduced. In addition, the fingerprint registration method filters the acquired fingerprint image, and stores the feature value of the filtered fingerprint image or the fingerprint image into the registration template, thereby The fingerprint registration system 100 is made more humanized by shortening the fingerprint registration time in one step.

[0154] Please refer to FIG. 4. FIG. 4 is a flowchart of a fingerprint verification method for the fingerprint identification system in the fingerprint verification mode. The fingerprint recognition system is, for example, the fingerprint recognition system 100 shown in FIG. The fingerprint verification method includes:

[0155] Step S201: When the user's finger touches or presses the push type fingerprint sensor 10吋, the fingerprint image scanned by the push type fingerprint sensor 10 is acquired;

[0156] Step S202: When the feature value of the fingerprint image or the fingerprint image obtained in the verification mode satisfies the predetermined condition 对应 corresponding to the feature value of the fingerprint image or the fingerprint image in the registration template, the identity verification is confirmed, otherwise the identity is confirmed. verification failed.

[0157] In the verification mode, the fingerprint verification method acquires one fingerprint image for each touch or press of the finger on the push type fingerprint sensor 10.

[0158] It should be noted that, in other embodiments, the sequence of the fingerprint registration method and the fingerprint verification method may be adjusted correspondingly, and some steps may be omitted or other steps may be added.

Although the present invention has been described with reference to the embodiments, it is to be understood that these embodiments are illustrative, and the scope of the invention is not limited thereto. Many changes, modifications, additions, and improvements are possible. More generally, embodiments of the present disclosure are described in the context of particular embodiments. The functions may be separated or combined in different ways in the various embodiments of the present disclosure, or may be described using different terms. These and other variations, modifications, additions, and improvements may be made within the scope of the present invention as defined by the following claims.

technical problem

Problem solution

Advantageous effects of the invention

Claims

Claim

[Claim 1] A fingerprint registration method of a fingerprint identification system, the fingerprint recognition system includes a push type fingerprint sensor, the push type fingerprint sensor includes a plurality of sensing electrodes, and the plurality of sensing electrodes are used for sensing The fingerprint of the user, the fingerprint registration method includes:

Step a: prompting the user to place a finger on the pressed fingerprint sensor;

Step b _: prompting the user to slide the finger after the user's finger is placed on the push type fingerprint sensor;

Step c: when the user's finger slides over the plurality of sensing electrodes, the plurality of fingerprint images acquired by the push-type fingerprint sensor;

Step d: acquiring multiple fingerprint images collected by the pressed fingerprint sensor, and performing fingerprint template registration according to the acquired feature values of multiple fingerprint images or fingerprint images.

[Claim 2] The fingerprint registration method according to claim 1, wherein: the fingerprint registration method further includes: between step a and step b:

Step e: determining whether the finger is stably placed on the push type fingerprint sensor, and when it is determined that the finger is stably placed on the push type fingerprint sensor, step b is performed, otherwise, step f is performed;

Step f: Prompt the user not to move his finger or cover the push-type fingerprint sensor.

[Claim 3] The fingerprint registration method according to claim 1, wherein: the fingerprint registration method further includes: between step a and step b:

Step e: determining whether the finger is stably placed on the pressing fingerprint sensor and the area of the finger covering the pressing fingerprint sensor is not less than a predetermined percentage of the area of the pressing fingerprint sensor, and determining that the finger is stably placed on the pressing fingerprint sensor If the area of the finger covering the pressed fingerprint sensor is not less than a predetermined percentage of the area of the fingerprint sensor, step b is performed; when it is determined that the finger is not stably placed on the pressed fingerprint sensor, step f is performed; The finger is stably placed on the push type fingerprint sensor, but the area of the finger covering the push type fingerprint sensor is less than a predetermined percentage of the area of the push type fingerprint sensor, then step g is performed; Step f: prompting the user not to move the finger or cover the push type fingerprint sensor;

Step g: Prompt the user to cover the area of the push-type fingerprint sensor to at least the predetermined percentage or completely cover the push-type fingerprint sensor.

[Claim 4] The fingerprint registration method according to claim 2 or 3, wherein: after the user's finger is placed on the push type fingerprint sensor, the fingerprint is collected by the push type fingerprint sensor, and is collected according to the push type fingerprint sensor. Whether the data between the adjacent fingerprint images is the same to determine whether the finger is stably placed on the push fingerprint sensor.

[Claim 5] The fingerprint registration method according to claim 1, wherein: the fingerprint registration method further comprises after step d:

Step h _: screening the obtained plurality of fingerprint images; and

Step I: Store the feature values of the filtered fingerprint image or fingerprint image into the registration template.

[Claim 6] The fingerprint registration method according to claim 5, wherein the fingerprint registration method further comprises the step of: judging whether the information amount of the fingerprint image obtained by the step h is sufficient, if sufficient, prompting If the registration is successful, the information is prompted to continue to register or re-register; wherein, the information amount includes whether the number of the fingerprint images after the screening is greater than a predetermined number of sheets or/and whether the area of the fingerprint image after the spliced fingerprint image is larger than the predetermined area.

[Claim 7] The fingerprint registration method according to claim 5, wherein: the method for screening the obtained plurality of fingerprint images in step h is:

Calculating, according to the obtained plurality of fingerprint images, a distance that the user's finger slides on the pressing fingerprint sensor, and filtering the fingerprint image according to the sliding distance; or according to the daytime sliding of the finger on the pressing fingerprint sensor To screen the fingerprint image; or

Screening of fingerprint images based on the distance the finger slides on the press-type fingerprint sensor and the sliding time; or

The fingerprint image is filtered according to the overlapping area of the obtained adjacent fingerprint images.

[Claim 8] The fingerprint registration method according to claim 1, wherein: step c comprises: determining whether the finger is placed on the push type fingerprint sensor, and if the finger is determined to be placed in the push type On the fingerprint sensor, fingerprint image acquisition is performed, and if it is determined that the finger is away from the pressing fingerprint sensor, the fingerprint image acquisition is stopped.

The fingerprint registration method according to claim 8, wherein: step c further comprises: determining whether a finger is placed at a same position of the pressed fingerprint sensor for more than a predetermined time interval, and if the predetermined time interval is exceeded, prompting the user Slide your finger.

The fingerprint registration method according to any one of claims 1 to 8-9, wherein the step c further comprises:

Calculate the sliding speed of the finger, and prompt the user whether the finger is sliding too fast or too slow according to the calculated speed.

The fingerprint registration method according to claim 3, wherein: said predetermined percentage is any value in the range of 40% to 100%.

The fingerprint registration method according to claim 1, wherein in step c, the sensing electrode on the push type fingerprint sensor performs a fingerprint feeling on the finger that is slid over the same according to claim 5 The fingerprint registration method is characterized in that: the filtered fingerprint image includes a plurality of, and the adjacent fingerprint images of the plurality of fingerprint images after the screening partially overlap, or the plurality of fingerprint images after the screening Whether there is overlap between adjacent fingerprint images, or there is overlap between partially adjacent fingerprint images in the plurality of fingerprint images after screening, and there is no overlap between some adjacent fingerprint images.

A fingerprint identification system includes a push type fingerprint sensor and a fingerprint processing device; the push type fingerprint sensor includes a plurality of sensing electrodes and an acquisition module, and the plurality of sensing electrodes are used to sense a finger fingerprint of the user; The fingerprint processing device includes a prompt module and an acquisition module; when the fingerprint recognition system works in the fingerprint registration mode:

The prompting module is configured to prompt the user to place a finger on the pressed fingerprint sensor, and after the user's finger is placed on the pressed fingerprint sensor, prompt the user to slide the finger. The collecting module is used when the user's finger is used The plurality of sensing electrodes are slid over the sputum and collected Multiple fingerprint images;

The acquiring module is configured to acquire a plurality of fingerprint images collected by the pressed fingerprint sensor, to perform fingerprint template registration according to the obtained feature values of the plurality of fingerprint images or the fingerprint images.

[Claim 15] The fingerprint recognition system according to claim 14, wherein: the push type fingerprint sensor further comprises a determination module, wherein the determination module is configured to determine whether the finger is stably placed on the push type fingerprint sensor When it is judged that the finger is stably placed on the sensing electrode, the prompting module prompts the user to slide the finger. Otherwise, the prompting module prompts the user not to move the finger or cover the pressed fingerprint sensor.

[Claim 16] The fingerprint recognition system according to claim 14, wherein: the push type fingerprint sensor further comprises a determination module, wherein the determination module is configured to determine whether the finger is stably placed on the push type fingerprint sensor And the area of the finger covering the pressing type fingerprint sensor is not less than a predetermined percentage of the area of the pressing type fingerprint sensor, and it is judged that the finger is stably placed on the pressing type fingerprint sensor and the area of the finger covering the pressing type fingerprint sensor is not less than the area of the fingerprint sensor. The predetermined percentage 吋, the prompting module prompts the user to slide the finger; when it is judged that the finger is not stably placed on the pressing fingerprint sensor, the prompting module prompts the user not to move the finger or cover the pressed fingerprint sensor; Placed on the push-type fingerprint sensor, but the area of the finger covering the push-type fingerprint sensor is smaller than a predetermined percentage of the area of the push-type fingerprint sensor, and the prompting module prompts the user to cover the area of the push-type fingerprint sensor to at least Given percentage or completely cover the pressing fingerprint sensor.

[Claim 17] The fingerprint identification system according to claim 15 or 16, wherein: after the user's finger is placed on the push-type fingerprint sensor, the fingerprint is collected by the acquisition module, and the module is determined according to the collection module. Whether the data between adjacent fingerprint images is the same to determine whether the finger is stably placed on the push type fingerprint sensor.

[Claim 18] The fingerprint identification system according to claim 14, wherein: the fingerprint processing device further comprises a screening module and a storage module, when the fingerprint recognition system operates in a fingerprint registration mode: The screening module is configured to filter the obtained multiple fingerprint images; and the storage module is configured to store the feature values of the filtered fingerprint image or the fingerprint image into the registration template.

The fingerprint identification system according to claim 18, wherein: the fingerprint processing device further comprises: a determining module, configured to determine whether the information amount of the fingerprint image obtained by the screening module is sufficient, if sufficient Prompt that the fingerprint registration is successful, otherwise it prompts to continue registration or re-registration;

The information amount includes whether the number of the fingerprint images after the screening is greater than a predetermined number of sheets or / and whether the area of the fingerprint image obtained after the spliced fingerprint image is spliced is greater than a predetermined area.

[Claim 20] The fingerprint identification system according to claim 18, wherein: the screening module is based on:

The fingerprint image is filtered by the distance the finger slides on the pressing fingerprint sensor; or the fingerprint image is filtered by the finger sliding on the pressing fingerprint sensor; or the distance and sliding of the finger on the pressing fingerprint sensor Screening of fingerprint images during the day; or

The area where the obtained adjacent fingerprint images overlap is obtained to perform screening of the fingerprint image.

[Claim 21] The fingerprint recognition system according to claim 14, wherein: when the fingerprint recognition system operates in the fingerprint registration mode, the collection module acquires the fingerprint image, and the pressed fingerprint sensor The judging module further determines whether the finger is placed on the push type fingerprint sensor. If it is determined that the finger is placed on the push type fingerprint sensor, the fingerprint image is collected, and if it is determined that the finger is away from the push type fingerprint sensor, the fingerprint image collection is stopped.

[Claim 22] The fingerprint identification system according to claim 21, wherein: when the fingerprint recognition system operates in a fingerprint registration mode, the capture module acquires a fingerprint image, and the pressed fingerprint sensor The judging module further determines whether the time at which the finger is placed at the same position of the push type fingerprint sensor exceeds a predetermined time. If the predetermined time interval is exceeded, the prompting module prompts the user to slide the finger.

[Claim 23] The fingerprint recognition system according to any one of claims 14, 21-22, characterized in The fingerprint processing device further calculates a module for calculating a sliding speed of the finger. When the fingerprint recognition system works in the fingerprint registration mode, the prompting module prompts the user whether the finger slides too fast or too slow according to the speed calculated by the computing module.

[Claim 24] The fingerprint recognition system according to claim 16, wherein: the predetermined percentage is any value in the range of 40% to 100%.

[Claim 25] The fingerprint recognition system according to claim 14, wherein: when the fingerprint recognition system operates in the fingerprint registration mode, the sensing electrode on the push type fingerprint sensor is for the finger that has slid over it Fingerprint sensing is performed.

[Claim 26] The fingerprint identification system according to claim 18, wherein: the fingerprint image after the screening module is filtered includes a plurality of fingerprint images between the adjacent fingerprint images There is a partial overlap, or whether there is overlap between adjacent fingerprint images in the plurality of fingerprint images after the screening, or there is overlap between some adjacent fingerprint images in the plurality of fingerprint images after the screening. There is no overlap between partially adjacent fingerprint images.

[Claim 27] An electronic device comprising the fingerprint recognition system according to any one of claims 14-26