WO2017156752A1 - Procédé d'enregistrement d'empreinte digitale, système d'identification d'empreinte digitale et équipement électronique associé - Google Patents

Procédé d'enregistrement d'empreinte digitale, système d'identification d'empreinte digitale et équipement électronique associé Download PDF

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Publication number
WO2017156752A1
WO2017156752A1 PCT/CN2016/076655 CN2016076655W WO2017156752A1 WO 2017156752 A1 WO2017156752 A1 WO 2017156752A1 CN 2016076655 W CN2016076655 W CN 2016076655W WO 2017156752 A1 WO2017156752 A1 WO 2017156752A1
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WIPO (PCT)
Prior art keywords
fingerprint
finger
fingerprint sensor
sensor
images
Prior art date
Application number
PCT/CN2016/076655
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English (en)
Chinese (zh)
Inventor
李其昌
Original Assignee
深圳信炜科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳信炜科技有限公司 filed Critical 深圳信炜科技有限公司
Priority to CN201680000094.XA priority Critical patent/CN105814586B/zh
Priority to PCT/CN2016/076655 priority patent/WO2017156752A1/fr
Publication of WO2017156752A1 publication Critical patent/WO2017156752A1/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor

Definitions

  • Fingerprint registration method fingerprint identification system, and electronic device
  • 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.
  • 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.
  • the fingerprint recognition system of an electronic device generally adopts a push type fingerprint sensor.
  • 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.
  • the present invention provides a short fingerprint registration method, a fingerprint identification system, and an electronic device.
  • a fingerprint registration method for a fingerprint identification 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:
  • 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 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.
  • 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, 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 the finger or cover the push fingerprint sensor.
  • 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 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;
  • Step f prompting the user not to move the finger or cover the push type fingerprint sensor
  • 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.
  • 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.
  • the fingerprint registration method further includes after step d:
  • Step h screening the obtained plurality of fingerprint images.
  • Step I storing the feature values of the filtered fingerprint image or the fingerprint image into the registration template.
  • 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.
  • 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.
  • step h the method for screening the obtained multiple fingerprint images in step h is:
  • step c includes:
  • 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.
  • step c further includes:
  • step c further includes:
  • the predetermined percentage is any value in the range of 40% to 100%.
  • step c the sensing electrodes on the push fingerprint sensor perform fingerprint sensing on the finger that slides thereon.
  • 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.
  • 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:
  • 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;
  • 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;
  • 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.
  • 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 ⁇ , 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.
  • 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
  • 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.
  • the fingerprint processing device further includes a screening module and a storage module, when the fingerprint recognition system works in the fingerprint registration mode:
  • 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.
  • 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;
  • 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.
  • the screening module is based on:
  • the finger is slid on the pressing fingerprint sensor to perform screening of the fingerprint image
  • 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.
  • 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.
  • the fingerprint processing device further calculates a module, configured to calculate a sliding speed of the finger.
  • the prompting module prompts the user whether the finger has swept according to the speed calculated by the computing module. Fast or too slow.
  • the predetermined percentage is any value in the range of 40% to 100%.
  • the sensing electrodes on the push fingerprint sensor perform fingerprint sensing on the fingers that are slid over them.
  • 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.
  • 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.
  • FIG. 1 is a schematic structural view of an embodiment of an electronic device according to the present invention.
  • FIG. 2 is a schematic structural diagram of a fingerprint identification system according to the present invention.
  • FIG. 3 is a flowchart of a fingerprint registration method for a fingerprint recognition system in a fingerprint registration mode according to the present invention.
  • 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.
  • 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.
  • 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.
  • the electronic device 1 is described by taking a mobile phone as an example.
  • 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 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.
  • 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
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the push-type fingerprint sensor 10 acquires a fingerprint image for each touch or press of the user's finger.
  • the touch includes, for example, a sliding operation.
  • the fingerprint processing device 20 includes an acquisition module 21 and a prompting module 27.
  • 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.
  • 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.
  • 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
  • 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.
  • 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.
  • 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.
  • 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.
  • the fingerprint processing apparatus 20 may further include a screening module 23 and a storage module 25.
  • 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.
  • 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.
  • 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.
  • 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.
  • the screening module 23 is based on:
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the fingerprint processing apparatus may further calculate a module 28 for calculating a sliding speed of the finger.
  • 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 .
  • 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 .
  • the acquisition module 21 acquires, for example, a fingerprint image for each touch operation by the user.
  • 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.
  • 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.
  • 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.
  • 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:
  • Step a prompting the user to place a finger on the push type fingerprint sensor 10;
  • Step b prompting the user to slide the finger after the user's finger is placed on the push type fingerprint sensor 10;
  • 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;
  • 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.
  • 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.
  • 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;
  • Step f Prompt the user not to move the finger or cover the push type fingerprint sensor 10.
  • 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 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
  • step b is performed; when it is determined that the finger is not stably placed on the push type fingerprint sensor 10 ⁇ , 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;
  • Step f prompting the user not to move the finger or cover the push-type fingerprint sensor 10;
  • 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.
  • the predetermined percentage is any value in the range of 40% to 100%.
  • the predetermined percentage is 40%, 50%, 60%, 100%, and the like.
  • 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.
  • the fingerprint registration method further includes after step d:
  • Step h screening the obtained plurality of fingerprint images.
  • Step I storing the feature values of the filtered fingerprint image or the fingerprint image into a registration template or a fingerprint database.
  • 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.
  • 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.
  • 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.
  • step h The method for screening the obtained multiple fingerprint images in step h is:
  • Screening of the fingerprint image is performed according to the overlapping area of the acquired adjacent fingerprint images.
  • a 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.
  • 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.
  • 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.
  • the second fingerprint image overlaps with the third fingerprint image.
  • 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.
  • 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.
  • 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.
  • 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.
  • step c further includes:
  • step c further includes:
  • step c further includes:
  • step c the sensing electrode 111 on the push-type fingerprint sensor 10 performs fingerprint sensing on the finger that has slid over it.
  • 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.
  • the fingerprint registration method acquires a fingerprint image by the sliding fingerprint sensor 10 by sliding, the registration time can be reduced.
  • 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.
  • 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:
  • Step S201 When the user's finger touches or presses the push type fingerprint sensor 10 ⁇ , the fingerprint image scanned by the push type fingerprint sensor 10 is acquired;
  • Step S202 When the feature value of the fingerprint image or the fingerprint image obtained in the verification mode satisfies the predetermined condition ⁇ 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.
  • the fingerprint verification method acquires one fingerprint image for each touch or press of the finger on the push type fingerprint sensor 10.
  • 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.

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  • Collating Specific Patterns (AREA)

Abstract

L'invention concerne un procédé d'enregistrement d'empreinte digitale d'un système d'identification d'empreinte digitale, un système d'identification d'empreinte digitale, ainsi qu'un équipement électronique. Le système d'identification d'empreinte digitale comprend un capteur d'empreinte digitale de type à pression, ledit capteur comprenant une pluralité d'électrodes de détection destinées à détecter l'empreinte digitale d'un utilisateur. Le procédé d'enregistrement d'empreinte digitale comprend : une étape A consistant à rappeler à un utilisateur de placer un doigt sur le capteur d'empreinte digitale de type à pression ; une étape B consistant à rappeler à l'utilisateur, une fois qu'il a placé son doigt sur le capteur d'empreinte digitale de type à pression, de faire glisser son doigt ; une étape C consistant, tandis que le doigt de l'utilisateur glisse sur la pluralité d'électrodes de détection, à collecter une pluralité d'images d'empreinte digitale obtenues au moyen du capteur d'empreinte digitale de type à pression ; et une étape D consistant à acquérir la pluralité d'images d'empreinte digitale collectées par le capteur d'empreinte digitale de type à pression, afin d'effectuer un enregistrement de modèle d'empreinte digitale en fonction de la pluralité d'images d'empreinte digitale acquises ou des valeurs caractéristiques de la pluralité d'images d'empreinte digitale.
PCT/CN2016/076655 2016-03-17 2016-03-17 Procédé d'enregistrement d'empreinte digitale, système d'identification d'empreinte digitale et équipement électronique associé WO2017156752A1 (fr)

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