KR101331480B1 - Method, apparatus and computer-readable recording medium for recognizing fingerprint - Google Patents

Abstract

According to the embodiment of the present invention, a fingerprint method comprising; a step of collecting multiple short fingerprint images which are sequentially obtained by a fingerprint sensor; a step of performing a navigation action according to fingerprint image moving amounts calculated through the collected multiple short fingerprint images; a step of determining that a moving direction of the fingerprint image is a predetermined specific direction; and a step of performing fingerprint recognition by integrating the collected multiple short fingerprint images if the moving direction of the fingerprint image is the predetermined specific direction is provided. [Reference numerals] (AA) Sensor standby;(BB,DD,GG) Yes;(CC,EE,FF) No;(S410) Collection of a segmented fingerprint image;(S420) Calculation of movement mounts of a fingerprint image;(S430) Navigation performace with calculated movement amounts;(S440) Is the movement direction from top to bottom?;(S450) Deletion of a stored fingerprint image;(S460) Store of a segmented fingerprint image for fingerprint verification;(S470) Is there additional data?;(S480) Active image for fingerprint verification?;(S490) Fingerprint comparison and processing

Description

METHOD, APPARATUS AND COMPUTER-READABLE RECORDING MEDIUM FOR RECOGNIZING FINGERPRINT}

The present invention relates to a method, an apparatus and a computer readable recording medium for fingerprint recognition, and more particularly, to a method, an apparatus and a computer readable recording medium for integrating a navigation operation and fingerprint recognition through fingerprint image movement. It is about.

Recently, various mobile communication terminals have provided various additional functions that utilize personal information such as mobile banking as well as communication functions such as a telephone or a text message transmission service. Accordingly, the need for a locking device of the mobile communication terminal is more important.

Existing locks applied to mobile terminals are mostly using passwords. For example, a locking device may be applied to a telephone function, an additional function, or an international telephone function, and in order to use the function, the password may be used only by inputting the corresponding password.

However, this method is inconvenient in that it becomes useless when the password is exposed, the password must be changed periodically to secure stability, and the user must remember the password from the user's point of view.

Therefore, in recent years, a terminal equipped with a locking device through fingerprint recognition has been developed in earnest in order to supplement such a method and improve the locking effect.

In order to mount such a fingerprint recognition device on a small-sized mobile communication terminal, the size of the sensor must be minimized. If necessary, the fingerprint recognition device may recognize a fingerprint 'Sliding type' fingerprint sensor is being developed.

Meanwhile, as the fingerprint recognition sensor is mounted on the mobile communication terminal, efforts have been made to combine it with other functions.

The present invention aims to improve user convenience by integrating a navigation function and a fingerprint recognition function for direction control without changing the mode of operation of the fingerprint sensor.

According to an embodiment of the present invention for achieving the above object, a step of collecting a plurality of fragment fingerprint images sequentially obtained by the fingerprint sensor; Performing a navigation operation according to a fingerprint image movement amount calculated from the collected plurality of fragment fingerprint images; Determining whether the moving direction of the fingerprint image is a predetermined specific direction; And if the fingerprint image movement direction is the specific direction, matching the collected plurality of fragment fingerprint images to perform fingerprint recognition.

The fingerprint image movement amount may be calculated based on the feature point change amount in the plurality of fragment fingerprint images sequentially obtained.

The specific direction is preferably perpendicular to the longitudinal direction of the fingerprint sensor.

The fingerprint recognition method may further include performing a specific operation authenticated or matched with a true user based on the fingerprint image obtained as a result of the matching.

The performing of the fingerprint recognition may include storing the plurality of fragment fingerprint images while the fingerprint image movement direction continues in the specific direction.

The performing of the fingerprint recognition may further include performing the fingerprint recognition when the number of the stored plurality of fragment fingerprint images or the amount of movement of the fingerprint image calculated through the collected plurality of fragment fingerprint images is greater than or equal to a threshold value. .

On the other hand, according to another embodiment of the present invention for achieving the above object, a fingerprint sensor for sequentially obtaining a plurality of fragment fingerprint images from the user's finger; A navigation performing unit configured to perform a navigation operation according to a fingerprint image movement amount calculated through the plurality of fragment fingerprint images; And a fingerprint recognizing unit configured to perform fingerprint recognition by matching the collected plurality of fragment fingerprint images when the moving direction of the fingerprint image is a preset specific direction.

The navigation performing unit may calculate the fingerprint image movement amount based on the feature point change amount in the plurality of fragment fingerprint images sequentially obtained.

The specific direction is preferably perpendicular to the longitudinal direction of the fingerprint sensor.

The fingerprint image obtained as a result of the matching may be compared with a pre-registered fingerprint image and used to authenticate or match a genuine user.

The fingerprint recognition device may further include a storage unit in which the plurality of fragment fingerprint images are stored while the fingerprint image movement direction continues in the specific direction.

The fingerprint recognition unit may perform the fingerprint recognition when the number of the stored plurality of fragment fingerprint images or the amount of movement of the fingerprint image calculated through the collected plurality of fragment fingerprint images is greater than or equal to a threshold value.

The fingerprint sensor may be a bar-shaped or straight fingerprint sensor.

On the other hand, another embodiment of the present invention provides another method in which the fingerprint function is also activated under certain conditions while the navigation function is activated, and a computer readable recording medium for recording a computer program for executing such a method.

According to the present invention, two operations may be integrated and simultaneously performed without switching between the navigation function and the fingerprint recognition function of the fingerprint sensor.

In addition, according to the present invention, other operations using the fingerprint recognition function may be simultaneously performed without manually changing to the fingerprint recognition mode while driving a specific application using the navigation function of the fingerprint sensor.

1 is a view showing the overall configuration of a fingerprint recognition device according to an embodiment of the present invention.
2 shows an example of a fragmentary fingerprint image obtained by a fingerprint sensor according to an embodiment of the present invention.
3 is a block diagram illustrating an internal configuration of a fingerprint recognition device according to an embodiment of the present invention.
4 is a flowchart illustrating an operation of a fingerprint recognition device according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION The following detailed description of the invention refers to the accompanying drawings that show, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

[Preferred Embodiment of the Present Invention]

Fingerprint reader operation

1 is a view showing the structure of a fingerprint recognition device according to an embodiment of the present invention.

Referring to FIG. 1, the fingerprint recognition device 100 may include a fingerprint sensor 110 at least in part. In the drawing, the fingerprint sensor 110 is illustrated as being formed at one side edge of the fingerprint recognition device 100, but it is not outside the scope of the present invention even if formed at any position.

The fingerprint recognition apparatus 100 according to an exemplary embodiment may be a digital device that performs a desired operation by performing predetermined data processing. The fingerprint recognition apparatus 100 may include an input unit and a display unit 101, and may provide a user with a state about an operation performed by a user's predetermined operation command through the input unit through the display unit 101. In FIG. 1, although the display unit 101 of the fingerprint recognition device 100 is implemented as a touch screen and serves as an input unit at the same time, the input unit is implemented as a keyboard or a keypad, for example, and is displayed on the display unit 101. It may be provided separately from).

Fingerprint recognition apparatus 100 according to an embodiment is a digital tablet having a computing power by mounting a microprocessor with a memory means such as a tablet PC, smartphone, personal computer, workstation, PDA, web pad, mobile phone, navigation, etc. It is to be understood as a generic term for the device.

The fingerprint sensor 110 according to one embodiment may be implemented as a slide type. The slide type fingerprint sensor 110 reads a fingerprint image of a finger moving in a sliding manner and reads the fingerprint image in a piecewise manner and then implements the fingerprint image by integrating the fingerprint image into a single image do.

FIG. 2 shows an example of a piece of fingerprint image obtained by the slide type fingerprint sensor 110 shown in FIG. For example, when the user moves his / her thumb against the fingerprint sensor 110 in a sliding manner, partial partial images P1 to P4 are successively obtained.

That is, the fingerprint images of the user are acquired sequentially in a fragmentary but continuous form. The short fingerprint images read from the fingerprint sensor 110 are matched to one fingerprint image.

According to one embodiment, the registered fingerprint image can be used as a means for verifying the legitimacy of the user compared with the previously registered fingerprint image. That is, the registered fingerprint image of the user may be stored in a database (not shown) of the fingerprint recognition device 100, and the fingerprint image acquired through the fingerprint sensor 110 is compared with the fingerprint image stored in the database. User authentication can be performed.

According to another embodiment, the registered fingerprint image may be compared with one or more previously registered fingerprint images to function as a command for performing a specific operation. For example, specific operations may be matched and stored for the fingerprint of each finger of the user, and if the matched fingerprint image obtained by the fingerprint sensor 110 coincides with the fingerprint image of the specific finger, Can be performed. This will be referred to as a 'quick launch' function in this specification. For example, if a true user's thumb fingerprint is recognized, the first application is activated, and if the true user's fingerprint of the index finger is recognized, the user can preset the second application to be driven. Thereafter, if the user moves the thumb to the fingerprint sensor 110 in a sliding manner, and if the matched fingerprint image acquired by the fingerprint sensor 110 matches the fingerprint image of the pre-registered thumb, the matching operation is performed. That is, the driving operation of the first application is made.

Meanwhile, according to another exemplary embodiment, a movement of a finger may be detected based on the fragmentary fingerprint images acquired by the fingerprint sensor 110 to perform a navigation operation. Specifically, as shown in FIG. 2, in the fragment fingerprint images sequentially obtained by the fingerprint sensor 110, it is determined in which direction the feature information is moved, and based on this, the direction of finger movement is determined. Detection and thus a navigation operation can be performed. For example, if the feature point in the first fragment fingerprint image is detected to have moved upward in the second fragment fingerprint image obtained thereafter, the finger has moved upward in relation to the fingerprint sensor 110, and thus this movement is performed. By detecting a direction, an operation (eg, movement of a cursor, scrolling of a screen, etc.) in the fingerprint recognition device 100 may be performed.

Typically, the above operations using the fingerprint image acquired by the fingerprint sensor 110 may be performed by selecting a mode for performing the corresponding operation. That is, since all of the above-described operations are performed by the user sliding the finger on the fingerprint sensor 110, it is necessary to select a mode for the desired operation. For example, if the user selects the user authentication mode, the fingerprint image acquired and matched by the fingerprint sensor 110 is used for true user authentication, and if the user selects the navigation mode, it is acquired by the fingerprint sensor 110. The navigation operation is performed by calculating the amount of movement of the fragmented fingerprint image.

However, in the present invention, the fingerprint image acquired through the fingerprint sensor 110 may be used for an operation desired by the user without selecting and switching the mode.

Internal configuration of the fingerprint reader

3 is a diagram illustrating an internal configuration of a fingerprint recognition device according to an embodiment of the present invention.

Referring to FIG. 3, the fingerprint recognition apparatus 100 according to an embodiment may include a fingerprint sensor 110, a fingerprint image processing unit 120, a navigation performing unit 130, a fingerprint recognition unit 140, and a storage unit 150. It may be configured to include.

According to an embodiment of the present invention, the fingerprint sensor 110, the fingerprint image processing unit 120, the navigation performing unit 130, the fingerprint recognition unit 140, and the storage unit 150 may each be a program module or hardware. . Such program modules or hardware may be included in the fingerprint recognition device 100 or another device capable of data communication with the fingerprint recognition device 100 in the form of an operating system, an application module, and other program modules, and are physically stored on various known storage devices. Can be. Such program modules or hardware, on the other hand, encompass but are not limited to routines, subroutines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types in accordance with the invention.

The fingerprint sensor 110 according to one embodiment may be implemented as a slide type fingerprint sensor as described with reference to FIGS. When the user slides the finger on the recognition window of the fingerprint sensor 110 at a predetermined speed, the fingerprint is scanned and a piece of fingerprint image can be obtained. Such a slide type fingerprint sensor is also referred to as a " bar-type " or "straight type" fingerprint sensor in contrast to the shape of the recognition window.

The fingerprint image processor 120 according to an exemplary embodiment converts the fragment fingerprint images obtained through the fingerprint sensor 110 into digital signals and collects them.

The navigation performing unit 130 according to an embodiment calculates the movement amount based on the fragment fingerprint images acquired through the fingerprint sensor 110 and converted by the fingerprint image processing unit 120 and performs the navigation operation accordingly. When a user slides a finger on the fingerprint sensor 110, a plurality of fragment fingerprint images are obtained, and the images may be arranged in order of time. Based on the fragment fingerprint images sequentially obtained, it may be determined in which direction the specific feature point has moved over time, and the degree of movement may be the amount of movement of the fingerprint image. Since the fingerprint sensor 110 is a straight fingerprint sensor, when the longitudinal direction is defined as the X-axis (see FIG. 1), if the feature point is moved in the positive direction of the X-axis, the finger is also positive on the X-axis. Since the movement in the direction, the navigation operation accordingly can be performed. For example, the cursor displayed on the display unit of the fingerprint recognition device 100 may move in the positive direction of the X axis, and the screen displayed on the display unit may scroll to move from right to left. In addition, in addition to the conventional operation, the same operations as in the case of pressing the " → " key representing the X-axis direction can be performed.

According to an exemplary embodiment, the fingerprint recognition unit 140 may determine whether the moving direction of the image is a predetermined direction based on the change of the fragment fingerprint images acquired by the fingerprint sensor 110 and converted by the fingerprint image processing unit 120. Determine whether or not. This is to inversely determine whether the user wants to recognize the fingerprint. In general, when the user wants to recognize the fingerprint, the user slides a finger in a specific direction with respect to the fingerprint sensor 110. It is possible to determine whether to start the recognition operation.

Assuming that the longitudinal direction of the straight fingerprint sensor 110 is a horizontal direction, a user typically slides a finger from the top to the bottom for fingerprint recognition. Therefore, the specific direction may be from top to bottom (negative direction of the Y axis), but is not limited thereto. Hereinafter, for convenience of description, it will be described on the assumption that the specific direction is a negative direction of the Y axis perpendicular to the longitudinal direction of the fingerprint sensor 110.

The moving direction of the fingerprint image may be derived through the moving direction of the feature points in the sequentially obtained fragment fingerprint images.

If it is determined that the moving direction of the fingerprint image is from top to bottom, the fingerprint recognition unit 140 stores the collected fragment fingerprint image in the storage unit 150 for fingerprint recognition. If the movement direction of the fingerprint image is in a direction other than the top-down direction, it can be discarded without storing.

Since a user who wants to perform fingerprint recognition typically slides a finger from the top to the bottom of the recognition window of the fingerprint sensor 110, the user indirectly infers whether or not a fingerprint recognition operation is desired through the user's finger movement. Here, although the movement of the fingerprint image is illustrated as performing fingerprint recognition when the negative direction of the Y axis perpendicular to the longitudinal direction of the fingerprint sensor 110 is performed, the fingerprint recognition is performed when the positive direction of the Y axis is implemented. It is not beyond the scope of. Further, even if the movement direction of the fingerprint image does not exactly coincide with the Y-axis direction, if it is determined that the movement in a linear direction within a certain range, for example, a predetermined angle range with respect to the Y-axis, the fingerprint recognition operation can be started. have.

According to an embodiment of the present invention, when the moving direction of the fragment fingerprint image is from top to bottom, the fingerprint recognition unit 140 is collected until the finger is dropped from the fingerprint sensor 110 and stored in the storage unit 150. Fingerprint recognition may be performed by matching all fingerprint images.

In addition, according to another exemplary embodiment of the present invention, the fingerprint recognition unit 140 may store the stored fragment fingerprint only when the number of the plurality of fragment fingerprint images stored while the moving direction of the fragment fingerprint image continues from the top direction is greater than or equal to a threshold. Fingerprint recognition may be performed by matching all images.

On the other hand, according to another embodiment of the present invention, the fingerprint recognition unit 140, the amount of fingerprint image movement calculated through a plurality of fragment fingerprint images stored while the direction of movement of the fragment fingerprint image continues from top to bottom, that is, Only when the sliding distance of the finger is greater than or equal to the threshold, fingerprint recognition may be performed by matching all the stored fragment fingerprint images.

That is, the fingerprint recognition unit 140 may determine the number of pieces of the plurality of fragment fingerprint images stored or the amount of movement of the fingerprint images calculated through the collected plurality of fragment fingerprint images while the movement direction of the fragment fingerprint image continues from the top to the bottom. Only in this case, the fingerprint recognition mode may be activated to perform fingerprint recognition.

According to an embodiment, the moving speed of a finger may be determined based on a time interval between obtaining the fragment fingerprint image and the amount of movement of the feature point, and through this, the fragment fingerprint images may be matched to obtain one completed fingerprint image. The process of matching the fragment fingerprint images may be performed by a conventional method, and a detailed description thereof will be omitted.

The fingerprint recognition unit 140 may perform an operation related to fingerprint recognition by comparing the completed fingerprint image with a pre-registered fingerprint image. For example, it may be determined whether or not the user is a true user through fingerprint recognition, and when matching with a specific fingerprint image among pre-registered fingerprint images, an operation (for example, driving a specific application) that matches the fingerprint image is performed. Can be done.

In the present invention, since the navigation function is always activated when the finger slides on the fingerprint sensor 110, and the fingerprint recognition is selectively performed according to the moving direction, the user selects and switches the navigation mode or the fingerprint recognition mode from the viewpoint of the user. There is no need to do this.

Motion algorithm

FIG. 4 is a diagram for explaining a process for performing a navigation operation and a fingerprint recognition operation by a fingerprint recognition device according to an embodiment of the present invention.

Referring to FIG. 4, when a finger touches the fingerprint sensor 110 while the fingerprint sensor 110 is waiting for sensing, the fragmented fingerprint image is continuously collected (S410). As described above, the conversion and processing on the data obtained by the fingerprint sensor 110 may be performed by the fingerprint image processing unit 120.

Thereafter, the movement amount of the fingerprint image is calculated based on the collected fragment fingerprint images (S420), and the navigation operation is performed based on the calculated movement amount (S430). As described above, the navigation operation in the same direction as the movement direction of the fingerprint image may be performed, and operations such as moving the mouse pointer, moving the cursor, and scrolling the screen may be performed.

At this time, when the moving direction of the fingerprint image is the top-down direction, that is, the direction perpendicular to the longitudinal direction of the fingerprint sensor 110 as the Y-axis, it is determined whether the Y-axis is the negative direction (S440). This is a criterion for determining whether the fingerprint recognition operation needs to be performed. Although the fingerprint recognition operation is started when the movement direction of the fingerprint image is the negative direction of the Y axis, the fingerprint recognition operation may be started when the movement direction of the fingerprint image is the positive direction of the Y axis. Moreover, even if it is not exactly in the Y-axis direction, if it exists in some extent, it can be judged as a movement of a substantial Y-axis direction.

If the movement direction of the fingerprint image is not the y-axis direction, the collected fingerprint image is deleted as it is (S450). It is sufficient if the navigation operation is performed at the same time as collecting the fingerprint image, and it is determined that it is not necessary to perform the fingerprint recognition based on the collected fingerprint image.

On the other hand, if it is determined that the movement direction of the fingerprint image is the direction of the Y-axis, the fragment fingerprint images collected for fingerprint recognition are stored in the storage unit 150 (S460).

Thereafter, while checking whether there is additional data, that is, the collected fragment fingerprint image (S470), the collected fragment fingerprint image is continuously stored until the finger is dropped from the fingerprint sensor 110. Steps S410 to S430 are repeatedly performed until the finger is removed from the fingerprint sensor 110. In other words, the navigation operation remains activated. While repeating this process, if the moving direction of the fingerprint image changes, the process of storing the fragment fingerprint image for fingerprint recognition may be stopped and the stored image may be deleted (S450).

If the moving direction of the fragment fingerprint image is continuously maintained in the negative direction of the Y axis, and if the finger is separated from the fingerprint sensor 110 and it is determined that there is no additional data in step S470, the fragment fingerprint image stored up to this point is used for fingerprint recognition. In operation S480, it is determined whether the image is valid. For example, it may be determined whether a fragment fingerprint image of at least the minimum amount (eg, 50pcs.) Required for fingerprint recognition is stored.

If there is a valid image for fingerprint recognition, the fragment fingerprint images are matched, compared with a pre-registered fingerprint image, and a corresponding operation is performed (S490). Authentication of a true user or execution of a specific operation matched with the corresponding fingerprint image may be performed.

The process of registering the fragment fingerprint images, that is, the operation of activating the fingerprint recognition mode, is based on the number of fragment fingerprint images stored while the movement direction of the fingerprint image is maintained in the negative direction of the Y axis or the fingerprint images calculated by the fragment fingerprint images. As described above, it may be performed only when the moving amount of is equal to or greater than the threshold.

The embodiments of the present invention described above can be implemented in the form of program instructions that can be executed through various computer components and recorded on a computer-readable recording medium. The computer-readable recording medium may include program commands, data files, data structures, and the like, alone or in combination. Program instructions recorded on the computer-readable recording medium may be those specially designed and configured for the present invention, or may be known and available to those skilled in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CD-ROMs, DVDs, and magneto-optical media such as floptical disks. media), and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device may be configured to operate as one or more software modules for performing the processing according to the present invention, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Therefore, the spirit of the present invention should not be construed as being limited to the above-described embodiments, and all of the equivalents or equivalents of the claims, as well as the following claims, I will say.

100: fingerprint recognition device
110: fingerprint sensor
120: fingerprint image processing unit
130: navigation unit
140: fingerprint recognition unit
150:

Claims (14)

Collecting a plurality of fragment fingerprint images sequentially acquired by the fingerprint sensor;
Performing a navigation operation according to a fingerprint image movement amount calculated from the collected plurality of fragment fingerprint images;
Determining whether a movement direction of the fingerprint image related to a movement direction of a finger with respect to the fingerprint sensor is a predetermined specific direction; And
And matching the collected plurality of pieces of fingerprint images when the fingerprint image movement direction is the specific direction, and performing fingerprint recognition. The method of claim 1,
The fingerprint image movement amount is calculated through a feature point change amount in the plurality of fragment fingerprint images sequentially obtained. The method of claim 1,
And the specific direction is a direction perpendicular to the longitudinal direction of the fingerprint sensor. The method of claim 1,
And performing a specific operation that is authenticated or matched with a true user based on the fingerprint image obtained as a result of the matching. The method of claim 1,
The fingerprint recognition step may include:
Storing the plurality of fragment fingerprint images while the fingerprint image movement direction continues in the specific direction. The method of claim 5,
The fingerprint recognition step may include:
And performing the fingerprint recognition when the number of stored plurality of fragment fingerprint images or the amount of movement of a fingerprint image calculated through the collected plurality of fragment fingerprint images is greater than or equal to a threshold value. A fingerprint sensor sequentially obtaining a plurality of fragment fingerprint images from a moving user's finger;
A navigation performing unit configured to perform a navigation operation according to a fingerprint image movement amount calculated through the plurality of fragment fingerprint images; And
When the movement direction of the fingerprint image related to the movement direction of the finger with respect to the fingerprint sensor is a predetermined direction, the fingerprint recognition unit for matching the plurality of pieces of the collected fingerprint images to perform fingerprint recognition, fingerprint recognition Device. The method of claim 7, wherein
The navigation performing unit is further configured to calculate the movement amount of the fingerprint image based on the change amount of the feature points in the plurality of fragmented fingerprint images obtained sequentially. The method of claim 7, wherein
And the specific direction is a direction perpendicular to the longitudinal direction of the fingerprint sensor. The method of claim 7, wherein
The fingerprint image obtained as a result of the matching is compared with a pre-registered fingerprint image is used to authenticate or match a specific user for a true user, fingerprint recognition device. The method of claim 7, wherein
And a storage unit in which the plurality of fragment fingerprint images are stored while the fingerprint image movement direction continues in the specific direction. 12. The method of claim 11,
The fingerprint recognition unit, when the number of the stored plurality of fragment fingerprint images or the amount of movement of the fingerprint image calculated through the collected plurality of fragment fingerprint images is greater than a threshold, the fingerprint recognition device. The method of claim 7, wherein
The fingerprint sensor is a bar or straight fingerprint sensor. A computer-readable recording medium for recording a computer program for executing the method according to any one of claims 1 to 6.

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