JP2007004612A - Face authentication device and face authenticating method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently acquire a proper face image not by emitting excessive radiant illumination to an authentication object person but by emitting illumination suitable to the authentication object person when imaging a face image of the authentication object person. <P>SOLUTION: An illumination unit 14 emits illuminating light obtained by reducing light of wavelength that makes the authentication object person feel radiance, a camera 11 images input face image data of the authentication object person in each basic color component of the authentication object person under the illumination, a face collation processing part 15 compares the input face image data with registered face image data 16a in each color component and performs face authentication processing on the basis of a comparison result in each color component. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention acquires a face image of a person to be authenticated while illuminating the face portion of the person to be authenticated, and performs face authentication by comparing the acquired input face image with a registered face image registered in advance. With regard to the authentication device and the face authentication method, in particular, when capturing a face image of the person to be authenticated, the person to be authenticated is not irradiated with excessively bright illumination, but is irradiated with illumination suitable for the person to be authenticated. The present invention relates to a face authentication apparatus and a face authentication method that can efficiently acquire an appropriate face image.

  2. Description of the Related Art Conventionally, there is known a face authentication device that performs authentication processing on whether or not an authentication target person is a registrant by comparing a face image of the authentication target person captured by a camera with registration data. In this type of face authentication device, the authentication accuracy decreases due to illumination fluctuations such as ceiling lighting and sunlight, so that the face authentication device itself is often provided with a lighting fixture.

  For example, in Patent Document 1, a collation unit 15 that integrally includes an imaging camera 12, a numeric keypad 13, and a card reader 14 is installed at a face height wall surface near the door, and the imaging conditions are changed to the upper part of the wall surface. For this purpose, an illumination light 16 and a speaker 17 are installed.

  Further, Patent Document 2 discloses a first illumination unit 102 that emits light at a constant illuminance from the upper right or upper left of the camera 101 that captures the face image of the person to be authenticated toward the face of the person to be authenticated. A second illumination unit 103 that irradiates light with a constant illuminance toward the face of the person to be authenticated from below the camera 101 is provided.

  As described above, in Patent Documents 1 and 2, the illumination light 16, the first illumination unit 102, and the second illumination unit 103 are provided in order to exclude illumination variations such as ceiling illumination and sunlight. In addition, it is possible to avoid a situation in which an unnecessary shadow is generated on the face portion of the person to be authenticated by these lighting devices.

Japanese Patent Application Laid-Open No. 11-316836 JP 2001-338296 A

  However, as in Patent Documents 1 and 2 described above, in order to provide a dedicated illumination device for the face authentication device and exclude illumination variations such as ceiling lighting and sunlight, the face portion of the person to be authenticated is relatively Since it is necessary to irradiate light with strong illuminance, there arises a problem that the person to be authenticated feels this light dazzlingly.

  In addition, if the illumination device irradiates light that the authentication subject feels dazzling from the illumination device, the facial expression of the authentication subject changes, resulting in a problem that the authentication accuracy is degraded. In particular, whether or not lighting is felt brightly depends on the subjectivity of the subject of authentication, and the illumination to be illuminated also varies depending on the skin characteristics of the subject of authentication. The problem is whether to apply suitable illumination.

  Therefore, when taking a face image of the person to be authenticated, do not irradiate the person to be authenticated with excessively bright illumination, but irradiate with illumination suitable for the person to be authenticated. Acquiring images is an important issue.

  The present invention has been made in view of the above-described problem (problem). When capturing a face image of a person to be authenticated, the authentication person is not irradiated with excessively bright illumination, but authentication is performed. An object of the present invention is to provide a face authentication apparatus and a face authentication method capable of efficiently acquiring an appropriate face image by irradiating illumination suitable for a subject.

  In order to solve the above-described problems, the present invention acquires a face image of the authentication target person while illuminating the face portion of the authentication target person, and the acquired input face image is a registered face image registered in advance. A face authentication apparatus for performing face authentication by collating, wherein an illumination unit that irradiates illumination light with reduced wavelength light that makes the person to be authenticated feel glare, and the person to be authenticated under illumination by the illumination unit An image capturing unit that captures an input face image for each basic color component, and an input face image captured by the image capturing unit is collated with a registered face image for each color component, and face authentication is performed based on a collation result for each color component And face authentication processing means for performing processing.

  Further, the present invention is the above invention, wherein the illumination unit includes an illumination unit formed by a red LED and a green LED, and the face authentication processing unit is configured to output a red component of an input face image captured by the imaging unit. In addition to collating with the red component of the registered face image, the green component of the input face image is collated with the green component of the registered face image, and face authentication processing is performed based on these collation results.

  Further, the present invention is the above invention, wherein the illumination unit includes an illumination unit formed by a red LED, a green LED, and an infrared LED, and the face authentication processing unit is an input face image captured by the imaging unit. The red component of the registered face image is matched with the red component of the registered face image, the green component of the input face image is checked with the green component of the registered face image, the infrared component of the input face image is checked with the infrared component of the registered face image, A face authentication process is performed based on these collation results.

  Further, the present invention acquires the face image of the authentication target person while illuminating the face part of the authentication target person, and compares the acquired input face image with a registered face image registered in advance to perform face authentication. A face authentication apparatus for performing an illumination unit for illuminating illumination light suitable for personal characteristics of the person to be authenticated, and an input for each basic color component of the person to be authenticated under illumination by the illumination unit An imaging unit that captures a face image, and a face authentication processing unit that collates the input face image captured by the imaging unit with a registered face image for each color component, and performs face authentication processing based on a matching result for each color component It is characterized by comprising.

  Further, in the present invention, the illumination unit is configured such that the illumination unit has an illumination unit formed of a red LED, a green LED, and a blue LED, and an illuminance of each LED forming the illumination unit so as to be adapted to the authentication target person. LED control means for controlling.

  Further, the present invention is the above invention, wherein each of the illumination units includes an illumination unit formed of a red LED, a green LED, a blue LED, and an infrared LED, and the illumination unit adapted to the person to be authenticated. LED control means for controlling the illuminance of the LED is provided.

  Further, the present invention acquires the face image of the authentication target person while illuminating the face part of the authentication target person, and compares the acquired input face image with a registered face image registered in advance to perform face authentication. A face authentication method for performing an illumination light irradiation step of irradiating illumination light with a reduced wavelength of light that makes the person to be authenticated feel glare, and the authentication target under illumination irradiated by the illumination light irradiation step An imaging step of capturing an input face image for each basic color component of the person, and matching the input face image captured by the imaging step with a registered face image for each color component, and based on a matching result for each color component And a face authentication processing step for performing authentication processing.

  Further, the present invention acquires the face image of the authentication target person while illuminating the face part of the authentication target person, and compares the acquired input face image with a registered face image registered in advance to perform face authentication. A face authentication method for performing an illumination light irradiation process for irradiating an illumination light suitable for personal characteristics of the authentication target person, and the authentication target person under illumination irradiated by the illumination light irradiation process An imaging process for capturing an input face image for each basic color component, and matching the input face image captured by the imaging process with a registered face image for each color component, and performing face authentication based on a matching result for each color component And a face authentication processing step for performing the processing.

  According to the present invention, illumination light with reduced wavelength light that makes the person to be authenticated feel glare is irradiated, and an input face image for each basic color component of the person to be authenticated is imaged under this illumination, and the captured input Since the face image is collated with the registered face image for each color component and the face authentication process is performed based on the collation result for each color component, the person to be authenticated is captured when the face image of the person to be authenticated is captured. However, it is possible to efficiently acquire an appropriate face image by irradiating the illumination suitable for the person to be authenticated, instead of irradiating excessively dazzling illumination.

  According to the present invention, the illumination unit includes an illumination unit formed of a red LED and a green LED. The red component of the captured input face image is collated with the red component of the registered face image, and the input face image The green component of the image is compared with the green component of the registered face image, and the face authentication process is performed based on the result of the comparison. This makes the person to be authenticated feel dazzled and greatly affects the authentication accuracy. Face authentication can be performed while excluding blue light that is not present.

  Further, according to the present invention, the illumination unit includes an illumination unit formed by a red LED, a green LED, and an infrared LED, the red component of the captured input face image is collated with the red component of the registered face image, Configuration that matches the green component of the input face image with the green component of the registered face image, matches the infrared component of the input face image with the infrared component of the registered face image, and performs face authentication processing based on these comparison results Accordingly, it is possible to perform face authentication while excluding the blue light that makes the person to be authenticated feel dazzled and does not significantly affect the authentication accuracy, and compensates for the insufficient light amount with infrared light. At this time, it is possible to cope with impersonation using a photograph by using infrared light and visible light in combination.

  Further, according to the present invention, illumination light that irradiates illumination light suitable for the personal characteristics of the person to be authenticated is irradiated, and an input face image is captured for each basic color component of the person to be authenticated under this illumination, and is captured. The input face image is collated with the registered face image for each color component, and the face authentication process is performed based on the collation result for each color component. Images can be acquired efficiently.

  Further, according to the present invention, the illumination unit includes an illumination unit formed of a red LED, a green LED, and a blue LED, and is configured to control the illuminance of each LED that forms the illumination unit so as to suit the person to be authenticated. Therefore, it is possible to efficiently irradiate illumination light suitable for a person to be authenticated while using an existing illumination unit based on the three primary colors of RGB that are basic light.

  Further, according to the present invention, the illumination unit includes an illumination unit formed of a red LED, a green LED, a blue LED, and an infrared LED, and the illuminance of each LED that forms the illumination unit so as to suit the person to be authenticated is set. Since it is configured to control, it is possible to efficiently irradiate illumination light suitable for the person to be authenticated while using an illumination unit in which infrared light is added to the RGB primary colors that are basic light. At this time, it is possible to cope with impersonation using a photograph by using infrared light and visible light in combination.

  Exemplary embodiments of a face authentication apparatus according to the present invention will be described below in detail with reference to the accompanying drawings. Here, a case where an illumination unit including an LED is used will be described.

  First, the external configuration of the face authentication apparatus 10 according to the first embodiment will be described. FIG. 1 is a diagram illustrating an external configuration of the face authentication apparatus 10 according to the first embodiment. As shown in the figure, a camera 11, a display unit 12, an IC card reader 13, and an illumination unit 14 are disposed on the front face of the face authentication apparatus 10.

  The camera 11 is a color imaging device formed by a CCD (Charge Coupled Devices) or the like. When the face image of the person to be authenticated is picked up by the camera 11, the face image data of the R plane (red plane), the G plane (Green plane) face image data, B plane (blue plane) face image data, and IR plane (infrared plane) face image data are acquired. Note that B-plane face image data is not used for authentication processing. The display unit 12 is a display device such as a liquid crystal panel that displays operation guidance and authentication results.

  The IC card reader 13 is a card reader for reading data from an IC card held by the person to be authenticated. When the person to be authenticated holds the IC card over the IC card reader 13, data is read from the IC card. Here, in the first embodiment, since the registered face image data is stored in the IC card, the registered face image data read from the IC card by the IC card reader 13 is compared with the input face image data to be compared. Will be.

  The illumination unit 14 is a unit that characterizes the present invention that irradiates illumination light with a wavelength that makes the person to be authenticated feel glare. Specifically, the illumination unit 14 is formed of a red LED, a green LED, and an infrared LED. The RGIR illumination unit 14e is provided. The lighting unit 14 controls the lighting unit to emit light when the human sensor detects the approach of a person, and controls the lighting unit to be turned off when the authentication process is completed.

  In this way, the reason why blue of the three primary colors is excluded is that a human feels light of a short wavelength (about 440 nm to about 380 nm) such as blue or purple even with the same amount of light. That is, only light having a relatively long wavelength (about 780 nm to about 500 nm) such as red and green is used. Note that. The blue light excluded in the present invention is originally low in sensitivity and has a relatively small influence on the verification rate.

  On the other hand, the reason why infrared light is used is to supplement the amount of light that excludes blue with infrared light that is invisible to human eyes. In addition, when performing face authentication by the face authentication device 10, an unauthorized third party may place a monochrome or color photo in front of the camera 11 to impersonate another person, but both infrared light and visible light are used together. By doing so, it is possible to prevent spoofing using such a photograph. Detailed description thereof will be described later.

  Next, the internal configuration of the face authentication device 10 shown in FIG. 1 will be described. FIG. 2 is a functional block diagram showing an internal configuration of the face authentication apparatus 10 shown in FIG. As shown in the figure, the face authentication device 10 includes a camera 11, a display unit 12, an IC card reader 13, an illumination unit 14, a face collation processing unit 15, and a storage unit 16. Since the camera 11, the display unit 12, and the IC card reader 13 have already been described, detailed descriptions thereof are omitted here.

  The illumination unit 14 includes a human sensor 14a that detects that the person to be authenticated is located at the imaging position, an R illumination control unit 14b that controls the illuminance and the like of the red LED, and a G illumination control that controls the illuminance and the like of the green LED. Part 14c, IR illumination control part 14d which controls the illumination intensity etc. of infrared LED, and RGIR illumination part 14e formed by red LED, green LED, and infrared LED. FIG. 3 is a diagram showing an example of the RGIR illumination unit 14e. As shown in the figure, the RGIR illumination unit 14e has a configuration in which a red LED, a green LED, and an infrared LED (IRLED) are arranged.

  In the lighting unit 14, if the human sensor 14a detects that the person to be authenticated is located at the imaging position, the human sensor 14a is used for the R lighting control unit 14b, the G lighting control unit 14c, and the IR lighting control unit 14d. The R illumination control unit 14b, the G illumination control unit 14c, and the IR illumination control unit 14d that have received the drive instruction control the lighting of the respective LEDs forming the RGIR illumination unit 14e. In addition, arrangement | positioning and the number of each LED shown in FIG. 3 are examples, and can be changed suitably.

  The face matching processing unit 15 is a processing unit that performs matching processing on input face image data and registered face image data for each basic color component, and performs face authentication processing based on a matching result for each color component. Specifically, the input face image data and the registered face image data are collated for each of the R plane, the G plane, and the IR plane, and it is determined whether or not both are the same person based on each collation result. It should be noted that various conventional techniques such as those using feature quantities can be used for such authentication processing.

  The storage unit 16 is a storage device such as a RAM or a flash memory that temporarily stores the registered face image data 16a. In the first embodiment, the registered face image data 16a for the R plane, G plane, and IR plane is stored in advance in the IC card held by the person to be authenticated, and the IC card reader 14 performs this when performing face authentication. The registered face image data 16a is read from the IC card, temporarily stored in the storage unit 16, and the registered face image data 16a stored in the storage unit 16 is read by the face authentication processing unit 15.

  Next, the processing procedure of the face authentication apparatus 10 shown in FIG. 1 will be described. FIG. 4 is a flowchart showing a processing procedure of the face authentication apparatus 10 shown in FIG. As shown in the figure, the face authentication device 10 turns on the RGIR illumination unit 14e when the human sensor 14a detects that the person to be authenticated is located at a predetermined position (Yes in step S101). (Step S102).

  Thereafter, the IC card reader 13 reads the registered face image data 16a from the IC card (step S103), and temporarily stores the read registered face image data 16a in the storage unit 16 (step S104).

  Then, the face image of the person to be authenticated is captured by the camera 11 under illumination by the illumination unit 14 (step S105). When an image is captured by the camera 11, input face image data of the R plane, the G plane, and the IR plane can be acquired. The face image may be captured prior to storing the registered face image data 16a in steps S103 to S104.

  Thereafter, R face image matching processing for matching the input face image data for the R plane and the registered face image data 16a for the R plane, and G face image matching for matching the input face image data for the G plane and the registered face image data 16a for the G plane. Processing, IR face image matching processing for matching the input face image data of the IR plane and the registered face image data 16a of the IR plane is performed (steps S106 to S108), and comprehensive determination processing is performed based on these matching results (step S109). ).

  Then, the comprehensively determined authentication result is displayed on the display unit 12 (step S110), the illumination is turned off (step S111), and the series of authentication processes is terminated. Although the case where the authentication processing result is displayed is shown here, the door opening / closing control or the like is actually performed according to the authentication processing result.

  As described above, in the first embodiment, the illumination unit 14 irradiates illumination light having a wavelength that makes the person to be authenticated feel dazzling, and the camera 11 performs the basic color of the person to be authenticated under this illumination. Input face image data for each component is imaged, and the face matching processing unit 15 matches the input face image data with the registered face image data 16a for each color component, and performs face authentication processing based on the matching result for each color component. When the face image of the person to be authenticated is captured, an appropriate face image is obtained by irradiating the authentication target person with illumination suitable for the person to be authenticated instead of irradiating the person to be authenticated with excessively bright illumination. Data can be acquired efficiently.

  In the first embodiment, the registered face image data 16a is stored in the IC card. However, the present invention is not limited to this, and the registered face image data 16a corresponds to the card ID of the IC card. In addition, it can be configured to be stored in the face authentication device 10 and to specify the registered face image data 16a corresponding to the card ID when the card ID is received.

  Moreover, although the case where the RGIR illumination unit 14e is provided in the illumination unit 14 is shown in the present embodiment, the present invention is not limited to this, and is formed by red LEDs and green LEDs excluding infrared LEDs. An RG illumination unit can be provided. In such a case, the spoofing prevention effect that is possible when infrared light and visible light are used in combination cannot be obtained, but it is possible to avoid a situation in which the person to be authenticated feels dazzling.

  In the first embodiment, the main purpose is not to make the person to be authenticated feel glare. However, the degree to which glare is felt depends on the subjectivity of the person. In addition, when capturing a face image, it is also desired to irradiate illumination light in consideration of the skin characteristics of the person to be authenticated. For this reason, in the present Example 2, the case where the illumination light suitable for the characteristic of a subject of authentication is irradiated is shown. Note that the external configuration of the face authentication device is the same as that shown in FIG.

  FIG. 5 is a functional block diagram illustrating the internal configuration of the face authentication apparatus 20 according to the second embodiment. As shown in the figure, the face authentication device 20 includes a camera 11, a display unit 12, an IC card reader 13, a face matching processing unit 15, a storage unit 16, and an illumination unit 21.

  Here, the camera 11 and the display unit 12 are the same as those shown in the first embodiment, and the IC card reader 13 is also substantially the same as that of the first embodiment. However, in the second embodiment, since the illumination condition data suitable for the person to be authenticated is stored in the IC card together with the registered face image data, the IC card reader 13 reads the illumination condition data from the IC card and performs illumination. It has a function of outputting to the illumination controller 21a of the unit 21.

  The face matching processing unit 15 is the same as that of the first embodiment in that it performs matching processing with input face image data for each basic color while referring to the registered face image data 16a stored in the storage unit 16, but here. The difference is that the B plane (blue plane) is also included in the processing target. Although the influence of blue on face matching is small, matching processing is also performed on this B plane. In the second embodiment, the light is emitted from the blue LED although the illuminance is likely to be set low. Therefore, the face authentication accuracy can be improved by performing the B plane face authentication process. .

  The illumination unit 21 is a unit that emits illumination light that matches the characteristics of the person to be authenticated, and specifically includes an RGBIR illumination unit 21f formed by a red LED, a green LED, a blue LED, and an infrared LED. The illumination unit 14 receives illumination condition data suitable for the authentication subject stored in the IC card, and irradiates illumination light suitable for the received illumination condition data. Such illumination condition data includes illuminances of red, green, blue, infrared, etc., and is determined when registering the registered face image data 16a in consideration of characteristics that the person to be authenticated feels dazzling and skin characteristics. And stored in the IC card together with the registered face image data 16a. Usually, since blue light is a major factor that gives glare, illumination condition data is generated by dividing the illuminance of infrared light to reduce the illuminance of blue and compensate for the lack of illuminance.

  Specifically, the illumination unit 21 controls the illumination controller 21a that controls the illumination controllers 21b to 21e for each color, the R illumination controller 21b that controls the illuminance and the like of the red LED, and the illuminance and the like of the green LED. G illumination control unit 21c, B illumination control unit 21d for controlling the illuminance and the like of the blue LED, IR illumination control unit 21e for controlling the illuminance and the like of the infrared LED, red LED, green LED, blue LED and infrared LED The RGBIR illumination unit 21f is formed. FIG. 6 is a diagram showing an example of the RGBIR illumination unit 21f. As shown in the figure, the RGBIR illumination unit 21f has a configuration in which a red LED, a green LED, a blue LED, and an infrared LED (IRLED) are arranged. It becomes. In addition, arrangement | positioning and the number of each LED shown in FIG. 6 are examples, and can be changed suitably.

  The illumination controller 21a receives illumination condition data from the IC card reader 13, and sends illumination conditions corresponding to the illumination condition data to the R illumination control unit 21b, the G illumination control unit 21c, the B illumination control unit 21d, and the IR illumination control unit 21e. It is a controller to notify.

  Next, the processing procedure of the face authentication apparatus 20 shown in FIG. 5 will be described. FIG. 7 is a flowchart showing a processing procedure of the face authentication apparatus 20 shown in FIG. As shown in the figure, in the face authentication device 20, the IC card reader 13 reads the illumination condition data and the registered face image data 16a from the IC card (step S201), and the illumination controller 21a that has received the read illumination condition data Under the control, optimum illumination control suitable for the person to be authenticated is performed (step S202).

  Further, after temporarily storing the read registered face image data 16a in the storage unit 16 (step S203), the face image of the person to be authenticated is captured by the camera 11 under illumination by the illumination unit 21 (step S204). When the camera 11 captures an image, input face image data of the R plane, G plane, B plane, and IR plane can be acquired. Note that the face image may be captured prior to storing the registered face image data 16a in step S203.

  Thereafter, R face image matching processing for matching the input face image data for the R plane and the registered face image data 16a for the R plane, and G face image matching for matching the input face image data for the G plane and the registered face image data 16a for the G plane. Processing, B face image matching processing for matching the input face image data for the B plane and the registered face image data 16a for the G plane, IR face image matching for matching the input face image data for the IR plane and the registered face image data 16a for the IR plane Processing is performed (steps S205 to S208), and comprehensive determination processing is performed based on these collation results (step S209).

  Then, the comprehensively determined authentication result is displayed on the display unit 12 (step S211), and a series of authentication processes is terminated. Note that the illumination turn-off control is performed at an appropriate timing after the face image is captured. Although the case where the authentication processing result is displayed is shown here, the door opening / closing control or the like is actually performed according to the authentication processing result.

  As described above, in the second embodiment, the illumination unit 21 emits illumination light suitable for the authentication target person, and the camera 11 captures input face image data for each basic color component of the authentication target person under the illumination. The face matching processing unit 15 matches the input face image data with the registered face image data 16a for each color component, and performs face authentication processing based on the matching result for each color component. Appropriate face image data can be efficiently acquired by irradiating illumination light suitable for the subjective feeling of skin characteristics and glare.

  In the second embodiment, the illumination condition data and the registered face image data 16a are stored in the IC card. However, the present invention is not limited to this, and the illumination condition data and the registered face image data 16a. Is stored in the face authentication device 10 in association with the card ID of the IC card, and when the card ID is received, the illumination condition data and the registered face image data 16a corresponding to the card ID are specified. You can also.

  In the present embodiment, the case where the RGBIR illumination unit 21f is provided in the illumination unit 14 is shown, but the present invention is not limited to this, and the red LED, the green LED, and the blue LED are excluded except for the infrared LED. An RGB illumination unit formed of LEDs can also be provided. In such a case, the spoofing prevention effect that is possible when infrared light and visible light are used in combination cannot be obtained, but it is possible to avoid a situation in which the person to be authenticated feels dazzling.

  By the way, in Examples 1 and 2, infrared light (IR) is used in combination with visible light (RGB). However, when both are used together, there is an effect that spoofing by an unauthorized person can be prevented. FIG. 8 is an explanatory diagram for explaining an effect when infrared light and visible light are used in combination. As shown in the figure, a color image can be acquired when a human is imaged with colored visible light, and a monochrome image is obtained when an image of a human is captured with infrared light. For this reason, when each of these color images and monochrome images is obtained, it can be determined that a person has been imaged.

  On the other hand, when an unauthorized person puts a monochrome photograph in front of the camera 11 and tries to impersonate another person, the imaging results of visible light and infrared light are both monochrome images. For this reason, when a monochrome image is obtained in both cases, it can be determined that a monochrome photograph is taken.

  Furthermore, when an unauthorized person attempts to impersonate another person by placing a color photograph in front of the camera 11, a color image is captured with visible light, but hardly appears with infrared light. This is because the toner does not absorb infrared light. For this reason, when a color image is obtained with visible light but not captured with infrared light, it can be determined that a color photograph is taken.

  The face authentication apparatus according to the present invention does not irradiate the authentication target person with excessively bright illumination when capturing a face image of the authentication target person, but irradiates illumination suitable for the authentication target person. This is useful for efficiently acquiring an appropriate face image.

It is a figure which shows the external appearance structure of the face authentication apparatus which concerns on the present Example 1. FIG. It is a functional block diagram which shows the internal structure of the face authentication apparatus shown in FIG. It is a figure which shows an example of the RGIR illumination part shown in FIG. It is a flowchart which shows the process sequence of the face authentication apparatus shown in FIG. It is a functional block diagram which shows the internal structure of the face authentication apparatus which concerns on the present Example 2. It is a figure which shows an example of the RGBIR illumination part shown in FIG. It is a flowchart which shows the process sequence of the face authentication apparatus shown in FIG. It is explanatory drawing for demonstrating the effect at the time of using infrared light and visible light together.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Face authentication apparatus 11 Camera 12 Display part 13 IC card reader 14 Illumination unit 14a Human sensor 14b R illumination control part 14c G illumination control part 14d IR illumination control part 14e RGIR illumination part 15 Face collation process part 16 Memory | storage part 16a Registration face Image data 20 Face authentication device 21 Illumination unit 21a Illumination controller 21b R illumination control unit 21c G illumination control unit 21d B illumination control unit 21e IR illumination control unit 21f RGBIR illumination unit

Claims (8)

A face authentication device that performs face authentication by acquiring a face image of a person to be authenticated while illuminating the face of the person to be authenticated and comparing the acquired input face image with a registered face image registered in advance. And
An illumination unit that emits illumination light with reduced wavelength light that makes the person to be authenticated feel glare;
Imaging means for imaging an input face image for each basic color component of the person to be authenticated under illumination by the illumination unit;
A face authentication processing unit that compares an input face image captured by the image capturing unit with a registered face image for each color component, and performs face authentication processing based on a matching result for each color component. Face recognition device.   The illumination unit includes an illumination unit formed by a red LED and a green LED, and the face authentication processing unit collates the red component of the input face image captured by the imaging unit with the red component of the registered face image. The face authentication apparatus according to claim 1, wherein the green component of the input face image is checked against the green component of the registered face image, and face authentication processing is performed based on the check result.   The illumination unit includes an illumination unit formed by a red LED, a green LED, and an infrared LED, and the face authentication processing unit converts the red component of the input face image captured by the imaging unit to the red component of the registered face image. , Match the green component of the input face image with the green component of the registered face image, match the infrared component of the input face image with the infrared component of the registered face image, and perform face authentication processing based on these matching results The face authentication apparatus according to claim 1, wherein: A face authentication device that performs face authentication by acquiring a face image of a person to be authenticated while illuminating the face of the person to be authenticated and comparing the acquired input face image with a registered face image registered in advance. And
An illumination unit that emits illumination light that illuminates illumination light suitable for the personal characteristics of the person to be authenticated;
Imaging means for imaging an input face image for each basic color component of the person to be authenticated under illumination by the illumination unit;
A face authentication processing unit that compares an input face image captured by the image capturing unit with a registered face image for each color component, and performs face authentication processing based on a matching result for each color component. Face recognition device.   The illumination unit includes an illumination unit formed of a red LED, a green LED, and a blue LED, and an LED control unit that controls the illuminance of each LED that forms the illumination unit so as to match the person to be authenticated. The face authentication apparatus according to claim 4.   The illumination unit includes an illumination unit formed by a red LED, a green LED, a blue LED, and an infrared LED, and an LED control unit that controls the illuminance of each LED forming the illumination unit so as to be adapted to the person to be authenticated. The face authentication apparatus according to claim 4, further comprising: This is a face authentication method for acquiring face images of a person to be authenticated while illuminating the face part of the person to be authenticated, and performing face authentication by comparing the acquired input face image with a registered face image registered in advance. And
Illumination light irradiation step of irradiating illumination light with reduced wavelength light that makes the person to be authenticated feel glare;
An imaging step of capturing an input face image for each basic color component of the person to be authenticated under illumination irradiated by the illumination light irradiation step;
A face authentication processing step of matching the input face image captured in the imaging step with a registered face image for each color component and performing face authentication processing based on a matching result for each color component. Face authentication method. This is a face authentication method for acquiring face images of a person to be authenticated while illuminating the face part of the person to be authenticated, and performing face authentication by comparing the acquired input face image with a registered face image registered in advance. And
An illumination light irradiation step of irradiating illumination light that irradiates illumination light suitable for the personal characteristics of the person to be authenticated;
An imaging step of capturing an input face image for each basic color component of the person to be authenticated under illumination irradiated by the illumination light irradiation step;
A face authentication processing step of matching the input face image captured in the imaging step with a registered face image for each color component and performing face authentication processing based on a matching result for each color component. Face authentication method.