WO2018161312A1 - Procédé et appareil d'identification d'empreintes digitales - Google Patents

Procédé et appareil d'identification d'empreintes digitales Download PDF

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Publication number
WO2018161312A1
WO2018161312A1 PCT/CN2017/076149 CN2017076149W WO2018161312A1 WO 2018161312 A1 WO2018161312 A1 WO 2018161312A1 CN 2017076149 W CN2017076149 W CN 2017076149W WO 2018161312 A1 WO2018161312 A1 WO 2018161312A1
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WIPO (PCT)
Prior art keywords
fingerprint
tested
finger
determining
preset
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Application number
PCT/CN2017/076149
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English (en)
Chinese (zh)
Inventor
汤辉
Original Assignee
深圳市汇顶科技股份有限公司
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 深圳市汇顶科技股份有限公司 filed Critical 深圳市汇顶科技股份有限公司
Priority to PCT/CN2017/076149 priority Critical patent/WO2018161312A1/fr
Priority to CN201780000196.6A priority patent/CN107004131A/zh
Publication of WO2018161312A1 publication Critical patent/WO2018161312A1/fr

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    • 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
    • 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
    • G06V40/1347—Preprocessing; Feature extraction
    • 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
    • G06V40/1365—Matching; Classification

Definitions

  • the present invention relates to the field of biometrics, and in particular, to a method and apparatus for fingerprint recognition.
  • fingerprints As a unique feature of the human body, fingerprints have lifetime invariance, uniqueness and convenience.
  • fingerprint recognition technology has been widely used in acquisition systems, access control systems, smart phones and other equipment.
  • the fingerprint recognition is performed through the feature point matching of the fingerprint image, and the fingerprint identification function on a plurality of mobile phone models can be successfully cracked by acquiring the fingerprint image and printing the fake fingerprint with a special material, and the security of the fingerprint recognition is better. low.
  • the present application provides a method and apparatus for fingerprint recognition, which can improve the security of fingerprint recognition.
  • a first aspect provides a method for fingerprint identification, comprising: acquiring N first feature points of a fingerprint to be tested, wherein N is an integer greater than or equal to 2; and N first feature points according to the fingerprint to be tested Determining a finger direction corresponding to the fingerprint to be tested; determining a recognition result of the fingerprint to be tested according to a finger direction corresponding to the fingerprint to be tested.
  • determining the recognition result of the fingerprint to be tested according to the direction of the finger corresponding to the fingerprint to be tested includes: if the finger direction corresponding to the fingerprint to be tested matches the preset direction Determining that the fingerprint to be tested is successfully identified; and/or if the finger direction corresponding to the fingerprint to be tested does not match the preset direction, determining that the fingerprint identification to be tested fails.
  • the to-be determined may be determined.
  • the finger direction corresponding to the fingerprint is matched with the preset direction, and/or the fingerprint to be tested is determined to be successful.
  • the fingerprint to be tested may be determined.
  • the corresponding finger direction does not match the preset direction, and/or the fingerprint identification to be tested fails.
  • the directions here may be consistently up, down, left or right, but this is The embodiment is not limited to this.
  • the finger direction corresponding to the fingerprint to be tested includes: a finger pressing direction corresponding to the fingerprint to be tested and/or a finger sliding direction corresponding to the fingerprint to be tested.
  • determining the recognition result of the fingerprint to be tested according to the direction of the finger corresponding to the fingerprint to be tested including: if the angle between the finger direction corresponding to the fingerprint to be tested and the preset direction is less than or equal to the first threshold, Determining that the fingerprint to be tested is successfully identified; and/or if the angle between the finger direction corresponding to the fingerprint to be tested and the preset direction is greater than the first threshold, determining that the fingerprint identification to be tested fails.
  • the acquiring the first first feature points of the fingerprint to be tested includes: selecting a preset of the plurality of feature points of the fingerprint to be tested and the preset feature point set The feature point matching feature point is determined as the first feature point, wherein the preset feature point set includes at least two preset feature points; determining the fingerprint to be tested according to the N first feature points of the fingerprint to be tested Corresponding finger direction, comprising: connecting the N first feature points according to a connection relationship between each preset feature point in the preset direction corresponding to the preset feature point set, and obtaining a finger pressing direction corresponding to the fingerprint to be tested .
  • the method before determining the identification result of the fingerprint to be tested according to the finger direction corresponding to the fingerprint to be tested, the method further includes: acquiring at least Determining a maximum angle between the finger pressing directions corresponding to the at least two reference fingerprint patterns; determining the recognition result of the fingerprint to be tested according to the finger direction corresponding to the fingerprint to be tested, including: if the maximum The angle is smaller than the second threshold, and the recognition result of the fingerprint to be tested is determined according to the finger pressing direction corresponding to the fingerprint to be tested.
  • the acquiring the first first feature points of the fingerprint to be tested includes: acquiring at least two fingerprints to be tested corresponding to the fingerprint to be tested, wherein the at least two The fingerprint pattern to be tested is a fingerprint pattern collected during the sliding process of the finger; and at least one pair of feature points matched in the at least two fingerprint patterns to be tested are determined as the first feature point.
  • the feature points of the matched at least one pair of feature points may be randomly selected from the fingerprint pattern to be tested, or the feature points of the matched at least one pair of feature points may be the preset feature points. Matching feature points.
  • determining, according to the N first feature points of the fingerprint to be tested, a finger direction corresponding to the fingerprint to be tested including: according to the at least And determining, by the acquisition time of the two fingerprints to be tested, and at least one pair of first feature points matched in the at least two fingerprints to be tested, determining a sliding direction of the finger corresponding to the fingerprint to be tested.
  • the fingerprint sliding direction corresponding to the fingerprint to be tested is one of the following: sliding to the left, sliding to the right, sliding upward, and downward Sliding; determining the recognition result of the fingerprint to be tested according to the direction of the finger corresponding to the fingerprint to be tested, including: if the sliding direction of the finger corresponding to the fingerprint to be tested is inconsistent with the preset sliding direction, determining that the fingerprint identification to be tested fails.
  • the method before determining the identification result of the fingerprint to be tested according to the finger direction corresponding to the fingerprint to be tested, the method further includes: determining the Whether the fingerprint pattern of the fingerprint to be tested matches the preset fingerprint pattern; determining the recognition result of the fingerprint to be tested according to the direction of the finger corresponding to the fingerprint to be tested, including: if the fingerprint pattern of the fingerprint to be tested and the preset fingerprint pattern Matching, determining a recognition result of the fingerprint to be tested according to a finger direction corresponding to the fingerprint to be tested.
  • the method further includes: if the fingerprint pattern of the fingerprint to be tested does not match the preset fingerprint pattern, determining that the fingerprint identification to be tested fails .
  • the method before the determining, by the user, the identification result of the fingerprint to be tested according to the finger direction corresponding to the fingerprint to be tested, the method further includes: The interactive interface receives an instruction, where the instruction is used to indicate whether the direction recognition function is enabled; determining the recognition result of the fingerprint to be tested according to the finger direction corresponding to the fingerprint to be tested, including: if the instruction indicates the opening direction identification function, according to the The finger direction corresponding to the fingerprint is measured, and the recognition result of the fingerprint to be tested is determined.
  • the fingerprint identification method provided by the embodiment of the present invention determines the finger direction corresponding to the fingerprint to be tested according to at least two first feature points of the fingerprint to be tested, according to at least two first feature points of the fingerprint to be tested, according to The finger direction corresponding to the fingerprint to be tested determines the recognition result of the fingerprint to be tested, which can improve the security of fingerprint recognition. .
  • a device for fingerprint identification is provided for performing the method of any of the above first aspect or any of the possible implementations of the first aspect.
  • the apparatus comprises means for performing the method of any of the above-described first aspect or any of the possible implementations of the first aspect.
  • another apparatus for fingerprint identification comprising: a memory for storing instructions for executing instructions stored in the memory, and a processor for executing instructions stored in the memory When the execution causes the processor to perform the first aspect or the first A method in any possible implementation of the aspect.
  • a computer readable medium for storing a computer program comprising instructions for performing the method of the first aspect or any of the possible implementations of the first aspect.
  • FIG. 1 is a schematic flowchart of a method for fingerprint identification according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a finger pressing direction in a fingerprint recognition method according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a fingerprint pattern corresponding to the finger pressing direction shown in FIG. 2.
  • FIG. 3 is a schematic diagram of a fingerprint pattern corresponding to the finger pressing direction shown in FIG. 2.
  • FIG. 4 is a schematic diagram of an angle between finger pressing directions of a reference fingerprint pattern in a fingerprint recognition method according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of another method for fingerprint identification according to an embodiment of the present invention.
  • FIG. 6 is a schematic flowchart of another method for fingerprint identification according to an embodiment of the present invention.
  • FIG. 7 is a schematic block diagram of an apparatus for fingerprint identification according to an embodiment of the present invention.
  • FIG. 8 is a schematic block diagram of another apparatus for fingerprint identification according to an embodiment of the present invention.
  • FIG. 1 shows a method 100 for fingerprint recognition provided by an embodiment of the present invention.
  • the method 100 can be performed by a device for fingerprint recognition.
  • the plurality of feature points of the fingerprint to be tested may include the at least two first feature points, where the at least two first feature points may correspond to different positions in a fingerprint pattern of the fingerprint to be tested, or may correspond to the fingerprint to be tested.
  • S120 Determine, according to the at least two first feature points of the fingerprint to be tested, a finger direction corresponding to the fingerprint to be tested.
  • the finger direction corresponding to the fingerprint to be tested may include at least one of the following: a finger The pressing direction and the finger sliding direction, but the embodiment of the invention is not limited thereto.
  • the fingerprint identification method determines the finger direction corresponding to the fingerprint to be tested according to at least two first feature points of the fingerprint to be tested, and at least two first feature points of the fingerprint to be tested.
  • the determination result of the fingerprint to be tested is determined according to the finger direction corresponding to the fingerprint to be tested, and the security of fingerprint recognition can be improved.
  • the recognition result of the fingerprint to be tested may be determined according to a finger pressing direction corresponding to the fingerprint to be tested.
  • the fingerprint pattern of the fingerprint to be tested may be collected, and at least two first feature points in the fingerprint pattern are acquired.
  • the at least two first feature points may be feature points that satisfy a specific feature among the plurality of feature points of the fingerprint to be tested.
  • the feature points that match the preset feature points in the preset feature point set among the plurality of feature points included in the fingerprint pattern of the fingerprint to be tested may be determined as the first feature point, where the pre- It is assumed that the feature point set may include at least two preset feature points.
  • the preset feature point set may include a first preset feature point and a second preset feature point.
  • the plurality of feature points included in the fingerprint pattern of the fingerprint to be tested may be respectively associated with the Matching the first preset feature point and the second preset feature point to determine a feature point of the plurality of feature points that matches the first preset feature point and a feature point that matches the second preset feature point
  • the feature point that matches the first preset feature point and the feature point that matches the second preset feature point are determined as the first feature point, but the embodiment of the present invention is not limited thereto.
  • the direction in which the at least two first feature points are connected in sequence may be determined as the finger pressing direction corresponding to the fingerprint to be tested, wherein, optionally, the at least two first feature points are pressed.
  • the direction of the sequence connection may be specifically a direction from a certain one of the at least two first feature points to another first feature point, for example, by the first of the at least two first feature points
  • the direction from the first feature point to the last first feature point may also be a direction formed by sequentially connecting two adjacent feature points of the at least two first feature points, or may be The two adjacent feature points of the at least two first feature points are processed by smoothing and the like in the direction of the sequential connection, which is not limited by the embodiment of the present invention.
  • connection order of the at least two first feature points may be preset, or may be determined according to characteristics or corresponding positions of the at least two first feature points. If the at least two first feature points are determined according to the preset feature point set, optionally, the connection order of the at least two first feature points may also be based on a preset matching the at least two first feature points. Feature point determination, implementation of the present invention This example does not limit this. As an optional example, at least two preset feature points in the preset feature point set may be sequentially connected to form a preset pressing direction, and at this time, at least two preset features in the preset pressing direction may be followed.
  • connection order of the points is connected to the at least two first feature points that match the at least two preset feature points, and the finger pressing direction corresponding to the fingerprint to be tested is obtained.
  • the line from the first preset feature point to the second preset feature point is a preset pressing direction.
  • the finger pressing direction corresponding to the fingerprint to be tested may be the first matching with the first preset feature point.
  • a feature point to a direction of the first feature point that matches the second preset feature point but the embodiment of the present invention is not limited thereto.
  • a determination result of the fingerprint to be tested may be determined by determining whether a finger pressing direction corresponding to the fingerprint to be tested matches a preset pressing direction, where the preset pressing direction may be preset by a user.
  • the fingerprint identification device may receive a second instruction for indicating the preset pressing direction through a user interaction interface, or the fingerprint recognition device may detect a gesture of the user when the setting interface is presented, and according to The detected gesture, determining the preset pressing direction, and the like.
  • the preset direction may be that the user selects from a plurality of optional directions in advance, or the preset pressing direction may also be a finger pressing direction when the user inputs a fingerprint.
  • the preset pressing direction may be It is composed of at least two preset feature points, and the like, which is not limited by the embodiment of the present invention.
  • an angle between a finger pressing direction corresponding to the fingerprint to be tested and a preset pressing direction may be determined, and a recognition result of the fingerprint to be tested is determined according to the angle.
  • the angle between the finger pressing direction and the preset pressing direction may be greater than or equal to 0 and less than or equal to 180 degrees, and specifically may be a finger pressing direction of the fingerprint to be tested to the preset pressing direction.
  • the angle of the finger may also be an angle of the finger pressing direction of the finger to be tested, which is not limited by the embodiment of the present invention.
  • the first threshold may be a default value or may be set by a user.
  • the fingerprint identification device may receive a first instruction by using a user interaction interface, where the first instruction is used to indicate the first threshold, and correspondingly, the fingerprint identification device may determine the first threshold according to the first instruction, but
  • the embodiment of the invention is not limited thereto.
  • the fingerprint identification device may be based on the hand corresponding to the fingerprint to be tested. Refers to the sliding direction to determine the recognition result of the fingerprint to be tested.
  • the fingerprint identification device may acquire a plurality of fingerprint patterns of the fingerprint to be tested (hereinafter referred to as a fingerprint pattern to be tested), wherein the plurality of fingerprint patterns to be tested may correspond to different finger pressing positions.
  • the plurality of fingerprint patterns to be tested are collected during the sliding of the finger on the pressing module, but the embodiment of the present invention is not limited thereto.
  • the fingerprint identification device may acquire at least one pair of matching feature points of the plurality of fingerprint patterns to be tested, and determine feature points of the at least one pair of matching feature points as the first feature points, wherein each pair of matching feature points may be The matching at least two feature points of the different fingerprint patterns to be tested in the plurality of to-be-tested fingerprint patterns, for example, the pair of matching feature points may include a certain feature of the first to-be-tested fingerprint pattern in the plurality of to-be-tested fingerprint patterns And a feature point of each of the second to-be-tested fingerprint patterns of the at least one second to-be-tested fingerprint pattern that matches the feature point, but the embodiment of the present invention is not limited thereto.
  • the feature points in the at least one pair of matching feature points may be randomly selected from the fingerprint patterns to be tested, or the feature points in the at least one pair of matching feature points may be matched with the preset feature points.
  • Feature points embodiments of the present invention are not limited thereto.
  • the fingerprint identification device may determine, according to the at least two first feature points, a finger sliding direction corresponding to the fingerprint to be tested.
  • the fingerprint identification device may determine a finger sliding direction corresponding to the fingerprint to be tested according to an acquisition time of the fingerprint pattern of the at least two first feature points.
  • the at least two first feature points may include the feature point A in the first to-be-tested fingerprint pattern and the feature point a in the second to-be-tested fingerprint pattern, and the acquisition time of the first to-be-tested fingerprint pattern is earlier than the
  • the fingerprint recognition device may determine the direction from the feature point A to the feature point a as the finger sliding direction corresponding to the fingerprint to be tested, but the embodiment of the present invention is not limited thereto.
  • the fingerprint identification device may determine whether the finger sliding direction corresponding to the fingerprint to be tested matches the preset sliding direction, and if the matching, the fingerprint identification device may determine that the fingerprint to be tested is successfully identified. Optionally, if there is no match, the fingerprint identification device may determine that the fingerprint identification to be tested fails.
  • the finger sliding direction and the preset sliding direction of the fingerprint to be tested may be one of the following: sliding upward, sliding downward, sliding to the left, and sliding to the right, optionally, if the waiting
  • the fingerprint sliding direction of the fingerprint is consistent with the preset sliding direction, for example, all sliding to the right
  • the fingerprint identification device may determine that the sliding direction of the finger corresponding to the fingerprint to be tested matches the preset sliding direction, and the fingerprint to be tested is successfully identified. .
  • the fingerprint identifying device may Determining the pair of fingerprints to be tested The finger sliding direction does not match the preset sliding direction, and the fingerprint identification to be tested fails.
  • the fingerprint identification device may further determine a finger sliding direction and a preset sliding corresponding to the fingerprint to be tested.
  • the angle between the directions if the angle is less than or equal to the third threshold, the fingerprint identification device may determine that the finger sliding direction corresponding to the fingerprint to be tested matches the preset sliding direction, and the fingerprint to be tested is successfully identified; if the angle is greater than In the third threshold, the fingerprint identification device may determine that the finger sliding direction corresponding to the fingerprint to be tested does not match the preset sliding direction, and the fingerprint identification to be tested fails, but the embodiment of the present invention is not limited thereto.
  • the third threshold may be greater than or equal to or less than the first threshold, which is not limited by the embodiment of the present invention.
  • the fingerprint identification device may determine the fingerprint identification result of the fingerprint to be tested according to the fingerprint pattern of the fingerprint to be tested and the finger direction corresponding to the fingerprint to be tested. For example, if the fingerprint pattern of the fingerprint to be tested matches the input fingerprint pattern and the finger direction corresponding to the fingerprint to be tested matches the preset direction, the fingerprint identification device may determine that the fingerprint to be tested is successfully identified. If the fingerprint pattern of the fingerprint to be tested does not match the input fingerprint pattern, or the finger direction corresponding to the fingerprint to be tested does not match the preset direction, the fingerprint identification device may determine that the fingerprint identification to be tested fails, and the embodiment of the present invention is not limited thereto. this.
  • the fingerprint identification device performs a process of determining whether the fingerprint pattern of the fingerprint to be tested matches the input fingerprint pattern and determining whether the finger direction corresponding to the fingerprint to be tested matches the preset direction.
  • the fingerprint identification device may first determine whether the fingerprint pattern of the fingerprint to be tested matches the fingerprint pattern entered.
  • the fingerprint identification device may further determine whether the finger direction corresponding to the fingerprint to be tested matches a preset direction, for example, determining a fingerprint corresponding to the fingerprint to be tested. Whether the finger pressing direction matches the preset pressing direction, and/or determining whether the finger sliding direction corresponding to the fingerprint to be tested matches the preset sliding direction.
  • the fingerprint identification device may determine that the fingerprint identification of the fingerprint to be tested fails, and does not perform subsequent finger direction determination, thereby improving recognition efficiency, but Embodiments of the invention are not limited thereto.
  • the user may set whether to determine the recognition result of the fingerprint to be tested according to the finger direction corresponding to the fingerprint to be tested.
  • the fingerprint identification device may receive a third instruction by using a user interaction interface, where the third instruction may be used to indicate whether to turn on the direction recognition function. Accordingly, the fingerprint identification device may indicate the opening direction in the third instruction.
  • the fingerprint identification device may determine whether to perform fingerprint recognition according to the finger direction corresponding to the fingerprint to be tested according to the fingerprint pattern (also referred to as a reference fingerprint pattern), that is, determine whether to turn on the direction recognition function.
  • the fingerprint pattern can be used for fingerprint recognition.
  • the fingerprint recognition device may determine whether to open the pressing direction recognition function according to the fingerprint pattern entered. Specifically, when the user enters the fingerprint, the fingerprint module can be pressed according to a specific angle. For example, as shown in FIG. 2, the fingerprint identification device can determine the finger pressing direction corresponding to the fingerprint pattern, and save the fingerprint pattern and Its corresponding finger presses the direction. For example, as shown in FIG. 3, the entered fingerprint pattern can be saved in the corresponding finger pressing direction.
  • the fingerprint identification device can determine whether the user fingerprint identification corresponding to the fingerprint to be tested is successful by determining whether the finger pressing direction corresponding to the fingerprint pattern to be tested matches the pre-storage finger pressing direction. Determine the authentication result of the fingerprint to be tested.
  • the detected user fingerprint pattern not only needs to match the pre-stored input fingerprint pattern, but the finger pressing direction corresponding to the user fingerprint pattern needs to match the finger pressing direction corresponding to the input fingerprint pattern, and the user corresponding to the user fingerprint pattern
  • the fingerprint can be successfully identified and successfully authenticated, but the embodiment of the present invention is not limited thereto.
  • the fingerprint identification device may collect multiple fingerprint patterns of the same fingerprint, hereinafter referred to as a reference fingerprint pattern.
  • the fingerprint recognition device may determine a maximum angle between the finger pressing directions corresponding to the plurality of reference fingerprint patterns, and determine whether to turn on the pressing direction recognition function according to the maximum angle. For example, if the maximum angle is greater than the second threshold, the fingerprint identification device may determine that the plurality of reference fingerprint patterns do not have a specific finger pressing direction, and the user does not specify a specific finger pressing direction, and accordingly, the fingerprint identifying device may The fingerprint direction recognition function is turned off when fingerprint recognition is performed.
  • the fingerprint identification device may determine that the plurality of reference fingerprint patterns have a specific finger pressing direction, and turn on the pressing direction recognition function when performing fingerprint recognition, but the present invention
  • the second threshold may be greater than the first threshold.
  • the second threshold may be twice the first threshold, but the embodiment of the present invention is not limited thereto.
  • the fingerprint identification device may determine a maximum angle between the finger pressing directions corresponding to the plurality of reference fingerprint patterns in a plurality of manners.
  • the fingerprint identification device may determine a feature point set of each of the plurality of reference fingerprint patterns, wherein the feature points in the feature point set may satisfy a specific feature or a corresponding specific location, for example, a feature point set.
  • the feature point in the feature point may be a feature point near the center line of the reference fingerprint pattern.
  • the fingerprint identification device Setting at least one feature point of the first reference fingerprint pattern in the plurality of reference fingerprint patterns, the at least one feature point constituting the reference point set of the first reference fingerprint pattern, wherein the first reference fingerprint pattern may be the earliest The collected reference fingerprint pattern, or any reference fingerprint pattern of the plurality of reference fingerprint patterns, the at least one feature point may be a feature point of the first reference fingerprint pattern facing the fingerprint identification device, for example, three o'clock or nine A feature point in the direction of the clock, but the embodiment of the invention is not limited thereto.
  • the fingerprint identification device may determine, according to the feature point set of the first reference fingerprint pattern, a feature point set corresponding to another reference fingerprint pattern, wherein the feature point in the feature point set corresponding to each other reference fingerprint pattern and the first reference The feature points in the feature point set of the fingerprint pattern match, but the embodiment of the present invention is not limited thereto.
  • the feature points in each feature point set may be sequentially connected in the same order, thereby forming a finger pressing direction corresponding to each reference fingerprint pattern.
  • the feature point set in the first reference fingerprint pattern P1 is specifically ⁇ feature point A, feature point B ⁇
  • the feature point set in the second reference fingerprint pattern P2 is specifically ⁇ feature point a, feature point. b ⁇ , wherein the feature point A matches the feature point a, and the feature point B matches the feature point b.
  • the direction from the feature point A to the feature point B may be determined as the finger pressing direction d1 corresponding to P1, and the direction from the feature point a to the feature point b is determined as the finger pressing direction d2 corresponding to P2, and the finger pressing direction corresponding to P1 and P2
  • the angle between them is the angle ⁇ of d1 and d2, but the embodiment of the invention is not limited thereto.
  • the fingerprint identification device can perform the above process on any two reference fingerprint patterns of the plurality of reference fingerprint patterns to determine an angle of a finger pressing direction corresponding to the any two reference fingerprint patterns.
  • the fingerprint identification device may determine an angle between the first reference fingerprint pattern and the finger pressing direction corresponding to each of the other reference fingerprint patterns, but the embodiment of the present invention is not limited thereto.
  • the fingerprint identification device may determine the maximum angle among the determined plurality of angles as the maximum angle between the finger pressing directions of the plurality of reference fingerprint patterns, but the embodiment of the present invention is not limited thereto.
  • the user when the user enters the fingerprint, the user may enter the method by sliding the finger, or may perform two entry, respectively input the fingerprint pattern and the sliding direction, and accordingly, the fingerprint recognition device may save the sliding of the user input.
  • the direction and the fingerprint recognition are performed according to the saved sliding direction, but the embodiment of the present invention is not limited thereto.
  • the fingerprint identification device when performing fingerprint recognition, may collect several frames of fingerprint patterns for determining a sliding direction when the user's finger leaves the fingerprint module, and if the sliding direction matches the sliding direction of the user input, determining the fingerprint The recognition is successful, thereby improving the security and reliability of fingerprint recognition.
  • FIG. 5 shows a method 200 for fingerprint recognition provided by an embodiment of the present invention.
  • the recognition result of the fingerprint to be tested is determined according to the finger pressing direction corresponding to the fingerprint to be tested.
  • the fingerprint identification device collects a first fingerprint pattern of the fingerprint to be tested.
  • the fingerprint identification device performs preprocessing on the first fingerprint pattern to obtain a second fingerprint pattern.
  • the fingerprint identification device may preprocess the first fingerprint pattern to remove various noise interferences in the first fingerprint pattern, restore the ridge structure of the fingerprint, and obtain a clear fingerprint image, but the embodiment of the present invention Not limited to this.
  • the fingerprint identification device performs feature point extraction on the second fingerprint pattern to obtain a plurality of second feature points of the second fingerprint pattern.
  • the fingerprint identification device performs feature point matching to determine whether the plurality of second feature points match the plurality of second preset feature points.
  • the plurality of second feature points may be used to determine whether the fingerprint to be tested matches the user input fingerprint to identify the user identity.
  • the method 200 jumps to S250.
  • the fingerprint identification device may determine that the identification of the fingerprint to be tested fails.
  • the fingerprint identification device performs feature point extraction processing on the second fingerprint pattern to obtain a plurality of first feature points in the second fingerprint pattern, and determines, according to the plurality of first feature points, the corresponding fingerprint to be tested.
  • the finger presses the direction.
  • the fingerprint identification device may determine a feature point that matches the first preset feature point in the first preset feature point set as the first feature point.
  • the finger pressing direction corresponding to the fingerprint to be tested may be a direction obtained by connecting the plurality of first feature points according to a preset connection direction of the plurality of first preset feature points matching the plurality of first feature points, but Embodiments of the invention are not limited thereto.
  • the fingerprint identification device determines whether a finger pressing direction corresponding to the fingerprint to be tested matches a preset pressing direction.
  • the preset pressing direction may be composed of a plurality of first preset feature points, but the embodiment of the present invention is not limited thereto.
  • the angle between the finger pressing direction corresponding to the fingerprint to be tested and the preset pressing direction is less than or equal to the first threshold, the finger pressing direction corresponding to the fingerprint to be tested and the preset pressing direction may be determined. Matching, but embodiments of the invention are not limited thereto.
  • the finger pressing direction corresponding to the fingerprint to be tested is opposite to the preset pressing direction Matching, it can be determined that the fingerprint to be tested is successfully identified. If there is no match, it can be determined that the fingerprint identification to be tested fails.
  • the finger pressing direction matching may be performed after performing the typical second feature point matching, thereby improving the security and reliability of the fingerprint identification, and the fingerprint recognition time may be correspondingly increased by 2 to 6 milliseconds. .
  • FIG. 6 shows a method 300 for fingerprint recognition provided by an embodiment of the present invention.
  • the recognition result of the fingerprint to be tested is determined according to the sliding direction of the finger corresponding to the fingerprint to be tested.
  • S310 to S340 are similar to S210 to S240. For brevity, details are not described herein.
  • method 300 jumps to S360.
  • the fingerprint identification device may determine that the fingerprint identification to be tested fails.
  • the fingerprint identification device collects at least one frame of the third fingerprint pattern of the fingerprint to be tested.
  • S350 and S340 may be performed simultaneously or in any order.
  • the fingerprint identification device may continuously collect at least one frame of the third fingerprint pattern after acquiring the first fingerprint pattern, and then perform feature point matching on the plurality of second feature points of the second fingerprint pattern, or After determining that the plurality of second feature points of the second fingerprint pattern are successfully matched, the third fingerprint pattern of the at least one frame is continuously collected, which is not limited by the embodiment of the present invention.
  • the fingerprint identification device determines, according to at least one frame of the third fingerprint pattern, a finger sliding direction corresponding to the fingerprint to be tested.
  • the fingerprint identification device may determine a relative moving direction between the matching feature points in the at least one frame of the third fingerprint pattern, or the feature points in the at least one third fingerprint pattern are relative to the first fingerprint pattern
  • the moving direction of the feature point is matched, and the moving direction is determined as the finger sliding direction corresponding to the fingerprint to be tested, but the embodiment of the present invention is not limited thereto.
  • the fingerprint identification device determines whether a finger sliding direction corresponding to the fingerprint to be tested matches a preset sliding direction.
  • the preset sliding direction may be specified by the user, for example, the user selects from a plurality of optional sliding directions, or is entered when the user enters the fingerprint, but the embodiment of the present invention is not limited thereto.
  • the finger sliding direction corresponding to the fingerprint to be tested may be determined.
  • the preset sliding direction matches.
  • the finger sliding direction corresponding to the fingerprint to be tested is consistent with the preset sliding direction, And the angle between the finger sliding direction corresponding to the fingerprint to be tested and the preset sliding direction is less than or equal to the first threshold, and the finger sliding direction corresponding to the fingerprint to be tested is determined to match the preset sliding direction, where
  • the preset sliding direction may be a horizontal direction or a vertical direction, but the embodiment of the invention is not limited thereto.
  • the fingerprint identification may be determined to be successful. If it does not match, it can be determined that the fingerprint recognition failed.
  • finger sliding direction matching may be performed after performing typical feature point matching, thereby improving the security and reliability of fingerprint recognition.
  • the fingerprint recognition time may be increased by 2 ⁇ N milliseconds, where N is the number of the third fingerprint patterns of the at least one frame.
  • FIGS. 2 through 6 are intended to provide a better understanding of the embodiments of the present invention, and are not intended to limit the scope of the embodiments of the present invention.
  • a person skilled in the art will be able to make various modifications or changes in the form of the above-described examples, and such modifications or variations are also within the scope of the embodiments of the present invention.
  • the method for fingerprint identification provided by the embodiment of the present invention is described in detail above with reference to FIG. 1 to FIG. 6.
  • the apparatus for fingerprint identification provided by the embodiment of the present invention is described below with reference to FIG. 7 and FIG.
  • the fingerprint identification device may be a portable or mobile computing device, such as a smart phone, a tablet computer, a wrist-worn device, and other wearable or portable devices, or may be a larger electronic device.
  • a portable or mobile computing device such as a smart phone, a tablet computer, a wrist-worn device, and other wearable or portable devices
  • personal computers, ATMs in portable form or desktop form can also be various terminals for various electronic systems, databases or information systems for commercial or government purposes, including motor vehicles, boats, trains, airplanes and other motorized traffic.
  • the system, and the like, are not limited in this embodiment of the present invention.
  • FIG. 7 shows a device 400 for fingerprint recognition according to an embodiment of the present invention, including:
  • the acquiring unit 410 is configured to acquire N first feature points of the fingerprint to be tested, where N is an integer greater than or equal to 2;
  • the identifying unit 420 is configured to determine, according to the N first feature points of the fingerprint to be tested acquired by the acquiring unit 410, a finger direction corresponding to the fingerprint to be tested, and determine the to-be-test according to the finger direction corresponding to the fingerprint to be tested. The recognition result of the fingerprint.
  • the identifying unit 420 is specifically configured to:
  • the finger direction corresponding to the fingerprint to be tested matches the preset direction, it is determined that the fingerprint to be tested is successfully identified;
  • the finger direction corresponding to the fingerprint to be tested does not match the preset direction, it is determined that the fingerprint identification to be tested fails.
  • the to-be determined may be determined.
  • the finger direction corresponding to the fingerprint is matched with the preset direction, and the fingerprint to be tested is successfully identified.
  • the fingerprint to be tested may be determined.
  • the corresponding finger direction does not match the preset direction, and the fingerprint identification to be tested fails.
  • the directions may be consistent here to mean up, down, left or right, but the embodiment of the invention is not limited thereto.
  • the identifying unit 420 is specifically configured to:
  • the angle between the finger direction corresponding to the fingerprint to be tested and the preset direction is greater than the first threshold, it is determined that the fingerprint identification to be tested fails.
  • the finger direction corresponding to the fingerprint to be tested includes: a finger pressing direction corresponding to the fingerprint to be tested and/or a finger sliding direction corresponding to the fingerprint to be tested.
  • the acquiring unit 410 is specifically configured to determine, as the first feature point, a feature point that matches a preset feature point in the preset feature point set among the plurality of feature points of the fingerprint to be tested.
  • the preset feature point set includes at least two preset feature points;
  • the identifying unit 420 is configured to: connect the N first feature points according to the connection relationship between each preset feature point in the preset direction corresponding to the preset feature point set, to obtain the fingerprint corresponding to the test The finger presses the direction.
  • the obtaining unit 410 is further configured to acquire at least two reference fingerprint patterns before the identifying unit 420 determines the recognition result of the fingerprint to be tested according to the finger direction corresponding to the fingerprint to be tested;
  • the identification unit 420 is further configured to determine a maximum angle between the finger pressing directions corresponding to the at least two reference fingerprint patterns acquired by the acquiring unit 410;
  • the identifying unit 420 determines the recognition result of the fingerprint to be tested according to the finger direction corresponding to the fingerprint to be tested, and includes:
  • the identification unit 420 determines that the maximum angle is smaller than the second threshold, determining the recognition result of the fingerprint to be tested according to the finger pressing direction corresponding to the fingerprint to be tested.
  • the obtaining unit 410 is specifically configured to:
  • the identifying unit 420 is configured to: determine, according to the collection time of the at least two fingerprints to be tested and the at least one pair of first feature points matched in the at least two fingerprint patterns to be tested, The direction of the finger sliding.
  • the finger sliding direction corresponding to the fingerprint to be tested is one of the following: sliding to the left, sliding to the right, sliding upward, and sliding downward.
  • the identifying unit 420 is specifically configured to: if the finger sliding direction corresponding to the fingerprint to be tested is inconsistent with the preset sliding direction, determining that the fingerprint identification to be tested fails.
  • the identifying unit 420 is configured to: if the finger sliding direction corresponding to the fingerprint to be tested is consistent with the preset sliding direction, determine that the fingerprint to be tested is successfully identified.
  • the identifying unit 420 is further configured to: before determining the recognition result of the fingerprint to be tested according to the finger direction corresponding to the fingerprint to be tested, determining whether the fingerprint pattern of the fingerprint to be tested matches the preset fingerprint pattern;
  • the identifying unit 420 determines the recognition result of the fingerprint to be tested according to the finger direction corresponding to the fingerprint to be tested, and includes:
  • the recognition result of the fingerprint to be tested is determined according to the finger direction corresponding to the fingerprint to be tested.
  • the identifying unit 420 is further configured to: if the fingerprint pattern of the fingerprint to be tested does not match the preset fingerprint pattern, determine that the fingerprint identification to be tested fails.
  • the apparatus 400 may further include: an interaction unit, configured to receive, by the user interaction interface, the identification unit 420, before determining the recognition result of the fingerprint to be tested according to the finger direction corresponding to the fingerprint to be tested. An instruction for indicating whether to turn on the direction recognition function;
  • the identification unit 420 is specifically configured to: if the instruction received by the interaction unit indicates the opening direction identification function, determine the recognition result of the fingerprint to be tested according to the finger direction corresponding to the fingerprint to be tested.
  • the apparatus 400 herein is embodied in the form of a functional unit.
  • the device 400 may be specifically the fingerprint identification device in the foregoing embodiment, and the device 400 may be used to perform various processes and/or steps in the foregoing method embodiments, to avoid repetition. I will not repeat them here.
  • unit may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor for executing one or more software or firmware programs (eg, sharing). Processors, proprietary processors or group processors, etc.) and memory, merge logic, and/or other suitable components that support the described functionality.
  • ASIC application specific integrated circuit
  • FIG. 8 illustrates another apparatus for fingerprint identification provided by an embodiment of the present invention, including: a processor 510 and a memory 520, wherein the memory 520 is configured to store an instruction, and the processor 510 is configured to execute the storage of the memory 520.
  • An instruction wherein the execution of the instruction causes the processor 510 to: acquire N first feature points of the fingerprint to be tested, where N is an integer greater than or equal to 2; according to the N pieces of the fingerprint to be tested a feature point, determining a finger direction corresponding to the fingerprint to be tested, and determining a recognition result of the fingerprint to be tested according to a finger direction corresponding to the fingerprint to be tested.
  • the device 500 may be specifically a device for fingerprint identification in the foregoing method embodiments, and the device 500 may be used to perform various processes and/or steps in the foregoing method embodiments. Avoid repetition and we will not repeat them here.
  • the processor may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital uplink signal processors (DSPs), and application specific integrated circuits ( ASIC), off-the-shelf programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and more.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory can include read only memory and random access memory and provides instructions and data to the processor.
  • a portion of the memory may also include a non-volatile random access memory.
  • the memory can also store information of the device type.
  • the processor can be used to execute instructions stored in the memory, and when the processor executes the instructions, the processor can perform the steps corresponding to the terminal device in the above method embodiments.
  • each step of the above method may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • Software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory Memory or electrically erasable programmable memory, registers, etc. are well-established in the storage medium of the art.
  • the storage medium is located in a memory, and the processor executes instructions in the memory, in combination with hardware to perform the steps of the above method. To avoid repetition, it will not be described in detail here.
  • system and “network” are used interchangeably herein.
  • the term “and/or” in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations.
  • the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated in one unit. In the unit.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

Abstract

L'invention concerne un procédé et un appareil d'identification d'empreintes digitales, capables d'améliorer la sécurité de l'identification d'empreintes digitales. Ledit procédé consiste à : acquérir N premiers points caractéristiques d'une empreinte digitale à détecter, N étant un nombre entier supérieur ou égal à 2 ; déterminer l'orientation d'un doigt correspondant à ladite empreinte digitale à détecter en fonction desdits N premiers points caractéristiques de l'empreinte digitale à détecter ; et la détermination d'un résultat d'identification de ladite empreinte digitale à détecter en fonction de ladite orientation du doigt correspondant à l'empreinte digitale à détecter.
PCT/CN2017/076149 2017-03-09 2017-03-09 Procédé et appareil d'identification d'empreintes digitales WO2018161312A1 (fr)

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CN201780000196.6A CN107004131A (zh) 2017-03-09 2017-03-09 指纹识别的方法及装置

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