KR100707689B1 - System and method for verifying faces by individual standard difference - Google Patents

Abstract

Disclosed are an image authentication system and method based on individual separation. The data generation unit generates numerical data by digitizing image data obtained from an authentication target that requires authentication. The first storage unit stores the identification information of the registered user and one or more reference numerical data corresponding to the identification information of the user. The separation degree calculation unit calculates a separation degree numerically representing a difference between the numerical data of the authentication subject and the reference numerical data, and detects user identification information corresponding to the reference numerical data corresponding to the smallest separation value, which is the smallest value among the calculated separation degrees. In addition, the separation calculation unit outputs the maximum separation degree, which is the largest value among the separation values calculated based on the reference numerical data corresponding to the detected user identification information and the numerical data of the authentication target, and the detected user identification information. The separation degree setting unit selects and outputs an individual separation degree corresponding to the identification information of the user input from the separation degree calculation unit among the individual separation degrees set for each individual in correspondence with the identification information of the registered user based on the identification information of the authentication subject. The authentication unit outputs an authentication permission signal when the maximum separation is smaller than the individual separation. According to the present invention, the identity rejection rate and the acceptance rate of others can be lowered by varying the standard of certification of the image data according to the individual by reflecting the characteristics of the individual from the authentication based on the uniform standard.

Description

System and method for verifying faces by individual standard difference

1 is a block diagram showing the configuration of a conventional image authentication system;

2 is a flowchart illustrating an authentication process performed in a conventional image authentication system;

Figure 3 is a block diagram showing the configuration of a preferred embodiment of the image authentication system according to the individual distance in accordance with the present invention,

4 is a block diagram showing a detailed configuration of a separation degree setting unit provided in the image authentication system according to the individual separation degree according to the present invention;

5 is a flowchart illustrating a process of authenticating using an individual separation degree in an image authentication system based on an individual separation degree according to the present invention;

FIG. 6 is a flowchart illustrating a process of setting a personal distance by a statistical method in an image authentication system based on a personal distance according to the present invention.

The present invention relates to an image authentication system and method according to individual separation degree, and more particularly, to an image authentication system and method for performing authentication by differentially assigning a standard separation degree that is set as a criterion for authentication according to individual characteristics. It is about.

The conventional image authentication system continuously photographs a plurality of specific body parts of a user registered in advance, extracts feature points from each image, and generates and registers one or a plurality of numerical data. Next, the conventional image authentication system digitizes image data of an authentication target input through a camera or the like and compares the image data with registered reference numerical data to determine whether to authenticate according to the separation degree of the two data. In this case, the conventional image authentication system determines whether to authenticate by applying the same criteria to all of the authentication target. Therefore, the conventional authentication system uniformly applies the criteria for certification without considering the characteristics of individuals, the importance of specific subjects, the similarity between individuals, etc., so that the False Reject Rate (FRR) and the False Accept Rate are others. : There is a problem that FAR) does not match the actual one.

The authentication standard in the image authentication system of the prior art becomes one numerical reference value that is uniformly applied to a power source that requires control or the like. Under such systems and methods, although the subjects and circumstances of authentication are different, the method of reflecting them may only be raised or lowered in the standard, thereby being rejected by the other person or by the user. In particular, if the optical sensor is not very precise, if the situation changes more severely than others, it is a space that needs to be treated as a secret. Therefore, such a problem may occur in situations where strict certification criteria are required, and there is a difference in importance among the target users. This is high.

As a result, according to the configuration of the conventional authentication system, lowering the standard value in order to guarantee perfect authentication success rate for everyone who requires authentication results in lowering the rejection rate. Increasing the standard raises the problem of increasing the rejection rate of users to be authenticated.

1 and 2 are each a block diagram showing the configuration of a conventional authentication system and a flowchart showing the process of performing the authentication method.

1 and 2, the conventional authentication system 100 includes a data generation unit 110, a storage unit 120, an authentication unit 130, and a control device 140.

The data generating unit 110 generates numerical data obtained by quantifying feature points of a face region, such as a distance between face components and a distribution value of pixels, based on an image input from a camera, which is an image input apparatus (S200). In addition, the data generating unit 110 optionally performs a preprocessing process, which is a preliminary process for converting the image data input through an image input device or the like into only necessary parts such as emphasizing the outline.

The storage 120 stores numerical images of images to be compared criteria of individuals requiring authentication.

The authentication unit 130 calculates a separation degree that is a difference between the numerical data provided from the data generating unit 110 and the reference numerical data serving as a comparison standard of the target person read from the storage unit 120 (S210). In addition, the authentication unit 130 compares the calculated gap and the basic gap which is the authentication standard common to the power supply (S220), and outputs whether to authenticate the authentication target to the external control device 140 (S230).

The control device 140 refers to an opening and closing device mounted on a door, a financial teller machine, a monitor, a safe, and the like, and receives a signal indicating authentication from the authentication unit 130 to control the opening and closing of the device.

As described above, according to the conventional image authentication system and authentication method, all the subjects of authentication are determined based on a uniform standard, so that personal characteristics and the like are not reflected at all in the authentication process. Therefore, in order to smoothly authenticate all the certification subjects, there is a problem that the certification acceptance criteria must be lowered unrealistically. In addition, if the authentication allowance standard is increased to increase the authentication rejection rate for unregistered users, there is a problem in that the authentication rate for the registered user is not achieved, resulting in a lower authentication rate.

The technical problem to be achieved by the present invention, by providing a standard gap to be the standard of certification for each individual to perform the certification process to increase the authentication rate, significantly lower the rate of rejection of others, and more accurately and reasonably operated authentication system and certification To provide a way.

Another technical problem to be achieved by the present invention is to provide an authentication method that is more accurate and reasonably operated by increasing the personal authentication rate and significantly lowering the rate of rejection of others by performing a certification process by differentially giving a standard gap as a standard of authentication for each individual. A computer-readable recording medium having recorded thereon a program for execution on a computer is provided.

In order to achieve the above technical problem, the image authentication system according to the individual separation degree according to the present invention comprises a data generation unit for generating numerical data by digitizing the image data obtained from the authentication target to be authenticated; A first storage unit storing stored identification information of the registered user and at least one reference value data corresponding to the identification information of the user; After calculating the separation degree numerically representing the difference between the numerical data provided from the data generation unit and the reference numerical data read out from the first storage unit, the minimum value which is the smallest value among the calculated separation degrees from the first storage unit Detecting the identification information of the user corresponding to the reference value data corresponding to the separation degree, the maximum separation degree, which is the largest value of the separation value calculated based on the reference value data corresponding to the detected user identification information and the numerical data of the authentication subject And a separation degree calculator for outputting the detected identification information of the user. Based on the detected identification information of the subject of authentication, the personal separation degree corresponding to the identification information of the user input from the separation degree calculation unit is selected and output from the individual separation degree set for each individual in correspondence with the identification information of the registered user. Spacing degree setting unit; And an authentication unit outputting an authentication permission signal when the maximum separation distance provided from the separation degree calculation unit is smaller than the individual separation degree provided from the separation degree setting unit.

In accordance with another aspect of the present invention, there is provided an image authentication method according to an individual separation degree, the numerical data storing step of storing identification information of a registered user and one or more reference numerical data corresponding to the identification information; A personal distance setting step of receiving and storing the identification information of the user and the personal distance of the user; A numerical data generation step of generating numerical data rules for acquiring and digitizing image data of an authentication subject who requires authentication; Calculating a separation degree numerically representing a difference between the input numerical data and at least one reference numerical data; The maximum value which is the largest value among the calculated distance information by the reference value data and the generated numerical data corresponding to the identification information of the registered user corresponding to the minimum separation degree that is the smallest value among the calculated separation degree and the generated numerical data Calculating a maximum separation degree calculating a separation degree; A reference interval setting step of setting the personal separation degree corresponding to the identification information of the registered user corresponding to the minimum separation degree as a reference separation distance; And an authentication step of outputting an authentication permission signal when the maximum separation degree of the authentication target is smaller than the reference separation degree.

Accordingly, by setting the individual separation degree, which is an authentication standard that is differentially granted to each subject, as a criterion for authenticating the subject, a more accurate and practical authentication can be performed to lower the rejection rate and the acceptance rate of others. Can operate more accurately and reasonably.

The authentication system according to the present invention can be applied to various fields such as access control, PC security, mobile terminal security, personal authentication for electronic banking services. In addition, the authentication system according to the present invention can use various types of image data such as fingerprint, iris, and face as data for user authentication. Hereinafter, the definitions of the terms used in the present specification.

The difference from standard imaginal date and caputred imaginal date is a numerical representation of the degree of difference between the acquired numerical data of the authentication target and the previously stored standard numerical data. The standard gap refers to the value of the certification comparison standard used to allow certification. The lower the standard gap is, the more rigorous the certification is, and the higher the margin is. Individual separation degree refers to the certification comparison standard value only for the individual given according to the characteristics of the individual, and basic separation degree refers to the uniform certification comparison standard value common to all people.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the image authentication system according to the individual distance in accordance with the present invention.

3 is a diagram showing a detailed configuration of the image authentication system according to the individual separation degree according to the present invention.

Referring to FIG. 3, the data generation unit 310 receives an image from a camera, which is an image input device, and performs numerical preprocessing on the received image. The spacing calculation unit 320 receives numerical data from the data generating unit 310, reads the reference numerical data stored in the first storage unit 350, and calculates the spacing between the numerical values. In addition, the spacing calculation unit 320 detects the identification information of the user corresponding to the reference value data corresponding to the smallest spacing, which is the smallest value among the calculated spacing, and outputs the identification information to the spacing setting unit 360. In addition, the distance calculation unit 320 outputs, to the authentication unit 330, the maximum distance, which is the largest value, among the distances calculated based on the reference numerical data corresponding to the detected user identification information and the numerical data of the authentication target.

In this case, it is possible to make more accurate authentication by allowing only the case where the maximum separation is smaller than the standard separation to determine whether to be certified based on the maximum separation, which is the maximum value, among the separation between the numerical data of the candidate and the reference numerical data of the target. Because.

The separation degree setting unit 360 outputs a personal separation degree corresponding to the identification information of the corresponding user received from the separation degree calculation unit 320.

The authentication unit 330 outputs an authentication permission signal when the maximum separation degree is smaller than the individual separation degree, and outputs an authentication rejection signal when the maximum separation degree is larger than the individual separation degree. At this time, the authentication unit 330 receives the maximum distance from the distance calculation unit 320, and receives the individual distance corresponding to the authentication target from the distance setting unit 360.

By adopting such a configuration, it is possible to lower the rejection rate of the person and lower the acceptance rate of others by changing the standard so that personal characteristics can be reflected from the existing uniform standard authentication.

4 is a block diagram showing a detailed configuration of the separation degree setting unit provided in the image authentication system according to the individual separation degree according to the present invention.

Referring to FIG. 4, the distance setting unit 360 includes a data input unit 410, a second storage unit 420, an update unit 430, a system interface 440, and a controller 450.

The data input unit 420 receives a user's identification information, an individual separation corresponding to the identification information of the user, a maximum allowable separation, a minimum allowable separation, and a change interval of the separation, which are limits of the personal separation setting. These values can be arbitrarily determined based on the operation policy of the certification system, the importance of the subject, and the importance of the certification space. For example, the executives of the company can set a larger personal distance to ensure free access, and in the case of subjects dealing with secrets, lower the individual distance for strict authentication. In addition, according to the statistical results, a user with a high self-denial rate can set a higher personal separation rate, and a user with a low-denial rate of denial can set a low personal separation level of the user.

The second storage unit 420 stores the identification information of the user and the individual distance corresponding to the identification information of the user. In addition, the second storage unit 420 is stored less than the individual clearance provided from the authentication unit 330, the result allowed clearance is stored. The result allowable interval stored at each authentication is stored in the second storage unit 420 while maintaining the existing individual interval if the interval does not correspond to the predetermined interval change period input through the data input unit 410. The individual distance stored in the second storage unit 420 is updated by the result calculated by the statistical method in the update unit 430. That is, the update unit 430 calculates the frequency of the result allowable separation degree stored in the second storage unit 420 when it corresponds to a predetermined update period (for example, one week) input through the data input unit 410. Then, the individual distance stored in the second storage unit 420 is updated to the result allowable distance having the maximum frequency. It is possible to operate reasonably close to the certification based on the actual criteria by reflecting the frequency of the resultant maximum separation degree, which is the maximum separation degree limited only when the authentication is allowed, in the update of the individual separation degree. In the process of calculating the resultant maximum spacing of the maximum frequency, when there are a plurality of result maximum spacings having a frequency having the highest frequency, the updater 440 calculates the median maximum frequency by adding the frequencies of a plurality of adjacent result maximum spacings, Update any of the resulting maximum spacings, which are the basis for calculating the median maximum frequency, to the individual spacing.

On the other hand, when the maximum frequency is the same as the maximum allowable and minimum allowable distances, which are set by the operator, as a result of the maximum frequency when the individual distance is updated, the predetermined correction value (for example, 0.1) is reduced or added. Update a value to a new personal separation.

The control unit 450 stores the values received from the data input unit 410 in the second storage unit 420 and stores the personal separation degree corresponding to the identification information of the user received from the distance calculation unit 320. Read from the) and outputs to the authentication unit 320 through the system interface 440.

5 is a flowchart illustrating a process of authenticating using an individual separation degree in the image authentication system according to the individual separation degree according to the present invention.

Referring to FIG. 5, the first storage unit 350 stores two or more pieces of reference numerical data of registered users, which are comparison criteria of authentication (S510). The reference numerical data means that the image defined for the registered users whose identity has been verified is preprocessed and digitized.

The distance setting unit 360 receives the user's identification information and the individual distance associated with the user from the operator through the data input unit 420 (S520).

The data generation unit 310 generates numerical data obtained by preprocessing the image of the user acquired through a camera or an optical terminal (S530). The spacing calculation unit 320 calculates the spacing by comparing the generated numerical data with all stored reference numerical data (S540). If all of the stored subjects are 100, and each of the subjects has five pieces of reference data stored therein, the distance calculation unit 320 calculates 500 separations for the numerical data of the subject currently being authenticated. do. Next, the distance calculation unit 320 calculates the minimum distance, which is the smallest value among the calculated distances, and the largest maximum distance among the identification information of the user corresponding to the reference numerical data corresponding to the minimum distance and the distance between the users. To calculate (S550).

In the above process, since the minimum distance is calculated by reference data having the highest agreement with the numerical data of the authentication subject, it is assumed that the registered user corresponding to the reference data is the authentication target. Subsequently, a maximum separation degree, which is the largest value among the separation values calculated by the reference numerical data of the registered user having the identification information corresponding to the minimum separation degree and the numerical data of the authentication subject, is calculated, and compared with the reference separation degree for authentication. The detected user identification information is provided to the separation degree setting unit 360 for reading the individual separation degree, and the maximum separation degree is provided to the authentication unit 330 for authentication.

The separation degree setting unit 360 selects an individual separation degree corresponding to the identification information of the user input from the separation degree calculation unit 320 and outputs the individual separation degree to the authentication unit 330 (S560).

The authentication unit 330 compares the individual separation received from the separation setting unit 360 with the maximum separation received from the separation calculation unit 320 (S570). If the maximum distance is less than the individual distance, the authentication unit 330 outputs an authentication permission signal (S580). In contrast, if the maximum separation degree is greater than the individual separation degree, the authentication unit 330 outputs an authentication rejection signal (S590). An external control device, for example, an access control device, time and attendance control device, a safe box, and an opening / closing device such as a cash dispenser, performs an operation in accordance with an authorization permission or an authorization rejection signal.

In setting the default value of the separation degree, if a common reference spacing is given to some subjects, the conventional authentication based on the uniform reference spacing and the authentication by the individual spacing according to the present invention may be combined. Table 1 lists the data stored in the first storage unit used for authentication based on individual distance.

 registrant  Identification Information  Standard numerical data  naze  0001  a1, a2, a3 ...  of  0002  b1, b2, b3 ...  bottle  0003  c1, c2, c3 ...  .....  ....  ....

When the numerical data "A" of the person to be authenticated is input from the data generation unit 310, the separation degree calculation unit 320 is based on all the reference numerical data stored in the first storage unit 350, and the minimum separation degree and minimum separation degree. Calculate the maximum separation among the separation degrees of the certification subject corresponding to the separation degree.

Table 2 lists the spacing, the minimum spacing, and the maximum spacing calculated by the spacing calculator 320.

 registrant  The price  Minimum separation  Separation  naze  | A1-A | = 0.52 | a2-A | = 0.51 | a3-A | = 0.56    0.51    0.56  of  B1-A | = 0.79 ｜ b2-A ｜ = 0.87 ｜ b3-A ｜ = 0.83  bottle  ..... .....  .....

The separation degree calculation unit 320 separates the separation degree (| a1-A |, | a2-A |, | a3-A |, | b1-A |, which is a difference between the numerical data A of the authentication subject and the stored reference numerical data). | B2-A | ...) is calculated. The separation degree is preferably rounded to three digits after the decimal point to two digits after the decimal point. The spacing calculation unit 320 obtains the smallest spacing (| a2-A | = 0.51), which is the smallest value among the calculated spacings, and then detects identification information (0001) corresponding to the minimum spacing and sets the spacing degree setting unit 360. Will output Meanwhile, the distance calculation unit 320 sets 0.56, which is the largest value among the separation distances 0.52, 0.51, 0.56, corresponding to the head (identification information 0001) that is the target of the reference numerical data a2 corresponding to the minimum distance, to set the maximum separation distance. Output to the authentication unit 330. The separation degree setting unit 360 outputs the personal separation degree 0.57 corresponding to 0001, which is the identification information of the user, to the authenticator 330. The authentication unit 330 compares 0.56, which is the maximum separation value input from the separation calculation unit 320, and 0.57, which is the individual separation input received from the separation setting unit 360, so that the maximum separation degree is smaller than the individual separation degree. Output The maximum separation allowed by the authentication is stored in the second storage unit 450 as a result maximum separation degree and is used as a basic data for updating the personal separation degree corresponding to the user later.

6 is a flowchart illustrating a process of updating the individual separation degree by a statistical method in the image authentication system according to the present invention.

Referring to FIG. 6, an initial value including a maximum allowable separation degree, a minimum allowable separation degree, and a separation period change period is input through the data input unit 420 (S610). The larger the gap, the larger the difference from the reference image data, so the maximum allowable gap is the most relaxed baseline that allows for authentication in setting the individual gap, while the minimum allowable gap is the strictest baseline. Initial setting value that can be set arbitrarily.

The spacing calculation unit 320 calculates a spacing degree that is a difference between the two data based on the numerical data of the authentication subject received from the data generating unit 310 and the reference numerical data received from the first storage unit 350. Next, the spacing calculation unit 320 obtains the minimum spacing, which is the smallest value among the calculated spacing, detects the identification information of the user corresponding to the reference numerical data corresponding to the minimum spacing, and outputs the identification information to the spacing setting unit 360. The separation degree setting unit 360 outputs the individual separation degree of the subject corresponding to the identification information of the user to the authenticator 330. In addition, the distance calculation unit 320 transmits the maximum separation degree, which is the largest value, among the separation values that are the difference between all the reference value data of the user corresponding to the reference numerical data corresponding to the minimum separation degree and the numerical data of the authentication subject, to the authenticator 330. Output The authentication unit 330 performs the authentication process by comparing the maximum separation degree input from the separation degree calculation unit 320 with the individual separation input from the separation degree setting unit 360 (S620). The control unit 430 stores the resultant maximum separation degree in the second storage unit 450 at each authentication time, as the maximum separation degree input from the separation degree calculation unit 320 is smaller than the individual separation degree, so that authentication is allowed (S630). As a result, the maximum separation is rounded up to the third decimal place. The update unit 440 determines whether or not a predetermined separation degree change period (for example, one week) received from the operator (S680), otherwise maintains the existing individual separation degree (S650). The initial individual separation is preferably set to the same value as the basic separation in that individual characteristics can be reflected later.

If it corresponds to the separation interval change period, the update unit 440 calculates the result maximum separation degree having the highest frequency among the result maximum separation degrees stored in the second storage unit 450 and updates it to a new individual separation (S660). . It is possible to operate reasonably close to the certification based on the actual criteria by reflecting the frequency of the resultant maximum separation degree, which is the maximum separation degree limited only when the authentication is allowed, in the update of the individual separation degree. In the process of calculating the resultant maximum spacing of the maximum frequency, when there are a plurality of resultant maximum spacings having the highest frequency, the updater 440 calculates the median maximum frequency by adding the frequencies of a plurality of adjacent resultant maximum spacings, and the median maximum frequency. Update any one of the maximum separations resulting from the calculation to the individual separation. For example, if the resultant maximum separation is 0.55, 50 times, 0.56 is 70 times, 0.57 is 70 times, 0.58 is 60 times, and the maximum frequency is 70 times. And the number of multiples of 0.57 are 120 times when the resulting maximum separation is 0.55 and 0.56, which is 120 times, which is 0.56, which is either 0.55 or 0.56, and the frequency of 0.57 and 0.58 by the same method. The sum of 130 frequencies is calculated as the frequency of resultant maximum separation of 0.58, which is either 0.57 or 0.58, and the resultant maximum distance of 0.58, which is the maximum frequency, is updated to individual separation. If the same maximum frequency occurs after the above-described process for the resultant maximum spacing having a plurality of maximum frequency numbers, the same method is repeatedly performed. In this way, the individual distance can be updated by using the value of the maximum distance having the maximum frequency.

Another way to handle the case of multiple maximum frequencies is as follows. For example, assuming that the frequency of the maximum separation of 0.57 is 20 times, the frequency of 0.58 is 40 times, the frequency of 0.59 is 30 times, and the frequency of 0.60 is 40 times. Calculate the frequency by doubling the storage base unit from the spacing stored as, 0.52,0.53,0.54 ... That is, the frequency is determined by 0.02 units, such as 0.50, 0.52, 0.54, 0.56, 0.58, and 0.60, with the second decimal place as the significant digit, and the maximum distance in the middle is the frequency of the rounded up maximum distance. Therefore, if the frequency of 0.57 is rounded up to a frequency of 0.58, and the resulting separation of 0.58 is not changed, the distribution of 0.58 becomes 60 times as a result. The frequency of 0.59 is rounded up to 0.60, and in the case of 0.60, if there is no change, the frequency of 0.60 is 70 times. Subsequently, when the resulting maximum spacing with the maximum frequency is obtained, the maximum frequency is 70 times, and the resulting maximum spacing corresponding to the maximum frequency is 0.60, and the resulting maximum spacing of 0.60 is updated to the individual spacing of the subject. Even after performing the above process, if there is more than one resultant gap with the maximum frequency, the frequency of each of the following positive integers, that is, 0.03 units, is obtained, and the resultant distance of the intermediate value is rounded up to obtain the frequency of the authentication allowance gap by 0.03 units. In this way, the maximum number of frequencies yields the resulting maximum separation.

On the other hand, if the maximum frequency of the result of the maximum frequency at the time of updating the personal distance is present between the predetermined maximum allowable distance, which is the upper limit of the allowable personal distance setting, which is set by the operator, and the predetermined minimum allowable distance, which is the lower limit of the allowable setting of the personal distance, the personal distance is S680. Update the result to the maximum separation distance (S690). At this time, if the resultant maximum separation is equal to the resultant maximum allowable separation, the predetermined correction value (for example, 0.1) is subtracted. If the resultant maximum separation is the same as the minimum separation value, the adjusted value (for example, 0.1) is added by applying the predetermined correction value. Update to a new personal separation (S685).

Thus, by using the numerical value having the highest frequency as the data for updating the personal distance by the statistical method based on the maximum distance of the result allowed for authentication, more practical criteria can be applied as the standard of authentication in authenticating the relevant subject. Can be. Table 3 describes the data stored in the second storage unit 450.

Identification Information Individual separation 1 time maximum result 2 times maximum result separation 3 times maximum result separation ..... 0001 0.57 0.54 0.55 0.51 ..... 0002 0.54 0.50 0.52 0.49 ..... 0003 0.61 0.67 0.41 0.48 .....

The separation degree setting unit 360 outputs a personal separation degree (for example, 0.57) corresponding to the user identification information to the authentication unit 330 when the user identification information (for example, 0001) is input from the separation degree calculation unit 320. do. If the maximum separation degree (for example, 0.54) of the authentication target is smaller than the output individual separation degree (for example, 0.57), the authentication unit 330 outputs the authentication permission signal to the control device 340. In addition, the authentication unit 330 stores the maximum allowed separation distance (for example, 0.54) in the second storage unit 450. If the resultant maximum separation degree corresponds to the change period input from the data input unit 420, the resultant maximum separation degree corresponding to the maximum frequency of the stored result maximum separation degree is updated to the personal separation.

The invention can also be embodied as computer readable code on a computer readable recording medium. Computer-readable recording media include any type of recording device that stores data that can be read by a computer system. Examples of computer-readable recording media include ROM, RAM, CO-ROM, magnetic tape, and floppy. Disks, optical data storage, and the like, and also include those implemented in the form of carrier waves (eg, transmission over the Internet). The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific preferred embodiments described above, and the present invention belongs to the present invention without departing from the gist of the present invention as claimed in the claims. Various modifications can be made by those skilled in the art, and such changes are within the scope of the claims.

According to the image authentication system and method according to the individual separation degree according to the invention, by allowing the individual to set different standards of authentication standard gap of authentication by individual, lowering the overall standard in order to authenticate all the subjects that have been a problem in the conventional authentication method The rate can also effectively overcome the increasing problem. In addition, it is possible to calculate the individual separation degree in a statistical manner so that it is possible to update the standard of the actual and reasonable separation degree of the individual to continue to effectively evolve by reflecting the change situation of the subject. Furthermore, the operator's operating instructions allow the operator to set the individual distance for the person who needs the criteria according to the individual distance and the individual distance for the person, and also if the access should be more free or vice versa. By directly assigning and setting the standard separation degree, a more flexible and accurate image authentication system can be realized.

Claims (10)

A data generation unit for generating numerical data by digitizing image data obtained from an authentication target for authentication; A first storage unit storing identification information of a registered user and a plurality of reference numerical data corresponding to the identification information of the user; After calculating the separation degree numerically representing the difference between the numerical data provided from the data generation unit and the reference numerical data read out from the first storage unit, the minimum value which is the smallest value among the calculated separation degrees from the first storage unit Detecting the identification information of the user corresponding to the reference value data corresponding to the separation degree, the maximum separation degree, which is the largest value of the separation value calculated based on the reference value data corresponding to the detected user identification information and the numerical data of the authentication subject And a separation degree calculation unit configured to output identification information of the detected user. Based on the detected identification information of the subject of authentication, the personal separation degree corresponding to the identification information of the user input from the separation degree calculation unit is selected and output from the individual separation degree set for each individual in correspondence with the identification information of the registered user. Spacing degree setting unit; And And an authentication unit outputting an authentication permission signal when the maximum separation distance provided from the separation degree calculation unit is smaller than the individual separation degree provided from the separation degree setting unit. The method of claim 1, The separation degree setting unit, A user interface unit for receiving identification information of the registered user and a personal distance corresponding to the registered user information from an operator; And A second storage unit storing identification information of the registered user and the personal distance; And a control unit for reading out and outputting a personal separation degree corresponding to the user identification information provided from the separation degree calculation unit from the second storage unit. The method of claim 2, The authentication unit outputs the resultant maximum separation degree to the separation degree setting unit, which is a maximum separation degree smaller than the personal separation degree provided from the separation degree setting unit among the maximum separation degrees provided from the separation degree calculation unit, The second storage unit stores the resultant maximum separation degree provided from the authentication unit and a predetermined separation distance change period input from the operator through the user interface unit every time the authentication is performed. And the separation degree setting unit further comprises an updating unit for updating the individual separation degree to the resultant maximum separation frequency of the maximum frequency among the resultant maximum separation degrees at each interval changing period. The method of claim 3, The update unit calculates the median maximum frequency by summing the frequencies of a plurality of adjacent resultant maximum spacings when there are a plurality of resultant maximum spacings of the maximum frequency, and converts any one of the resultant maximum spacings as the basis of the intermediate maximum frequency count as the individual spacing. Image authentication system, characterized in that for updating The method of claim 3, The updating unit subtracts a predetermined correction value when the resultant maximum spacing with the highest frequency is the maximum allowable spacing, which is the upper limit of the individual spacing, and the minimum allowable result with the highest frequency is the lower limit of the personal spacing. In the case of the separation degree, a predetermined correction value is applied to set the individual separation degree,  And the maximum allowable distance and the minimum allowable distance are input from the operator through the user interface. A numerical data storage step of storing identification information of a registered user and a plurality of reference numerical data corresponding to the identification information; A personal distance setting step of receiving and storing the identification information of the user and the personal distance of the user; A numerical data generation step of generating numerical data rules for acquiring and digitizing image data of an authentication subject who requires authentication; Calculating a separation degree numerically representing a difference between the input numerical data and at least one reference numerical data; The maximum value which is the largest value among the calculated distance information by the reference value data and the generated numerical data corresponding to the identification information of the registered user corresponding to the minimum separation degree that is the smallest value among the calculated separation degree and the generated numerical data Calculating a maximum separation degree calculating a separation degree; A reference interval setting step of setting the personal separation degree corresponding to the identification information of the registered user corresponding to the minimum separation degree as a reference separation distance; And an authentication step of outputting an authentication permission signal when the maximum separation degree of the authentication target is smaller than the reference separation degree. The method of claim 6, The personal distance setting step, An update environment input step of receiving a separation rate change cycle from an operator; A result maximum distance storing step of storing a resultant maximum separation degree which is the maximum separation degree smaller than the personal separation degree corresponding to the authentication subject among the maximum distance degrees calculated for the authentication subject; And a personal separation degree updating step of updating the individual separation degree with the highest spacing frequency among the resultant maximum separation degrees stored in the storage means when the separation degree change period is reached. The method of claim 7, wherein In the step of updating the individual spacing, when there are a plurality of resultant maximum spacings of the maximum frequency, the frequency of the plurality of adjacent resultant maximum spacings is added to calculate a median maximum frequency and any one of the resultant maximum spacings which is the basis of the calculation of the median maximum frequency. Image authentication method characterized in that for updating to the individual distance. The method of claim 7, wherein The personal separation degree update step, An update allowance range input step of receiving a maximum allowable gap, which is an upper limit of the individual gap, and a minimum allowable gap, which is a lower limit of the individual gap; And a correction step of subtracting a predetermined correction value when the resultant maximum separation degree is the maximum allowable separation degree and applying a predetermined correction value when the maximum allowable separation degree is the maximum allowable separation degree. A computer-readable recording medium in which the image authentication method according to any one of claims 6 to 9 records a program for execution on a computer.

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