JP4369187B2 - Personal identification device - Google Patents

Description

  The present invention relates to a personal identification device that identifies a user using two biological elements, a face and a fingerprint.

The configuration of the personal identification device using the face identification device for identifying the shape of the face includes a camera that captures a face image and a control unit that performs image processing and personal identification. The control unit performs personal identification according to the following procedure. Do.
(1) A human face is identified and cut out from an image captured by a camera.
(2) An image suitable for identification is selected from a plurality of face images.
(3) Adjust the size of the face image.
(4) The personal data is obtained by collating with the face data stored in advance.
However, since it is difficult to identify individuals by using only a face image, Patent Document 1 proposes an invention that uses biological information other than a face at the same time.

JP 2002-230553 A

  The difficulty in identifying a face is that the face of the other party (user) to be identified always changes. Even if it is the same human image, the image when blinking, the image when looking sideways, the image when facing away from the basic (for example, the facial expression required for ID photos, etc.) There are images, etc., which hinders personal identification. The collation time of the face identification device is about 2 seconds to be practically used. In order to obtain an optimal face image from a constantly changing face image, it is necessary to capture several face images in 2 seconds. That is, it is necessary to perform the image cutting process (1) and the selection process (2) at an extremely high speed. Therefore, a face recognition device that can withstand practical use cannot be provided unless an ultra-high-speed image processing device is used, and currently commercially available face recognition devices are very expensive.

  The shadow of the face is also a problem. This is because the location where a shadow is generated varies depending on the angle of light hitting the face. When performing face identification, it is desirable to illuminate the face with a light source so as to eliminate shadows. However, if the light source is always turned on, environmental problems such as energy saving and lamp life will occur.

  Further, misidentification of the face identification device will be described. There are very similar faces in the world, such as twins. A face identification device cannot identify very similar faces. Therefore, in applications that require a high level of discrimination performance, the face discrimination device alone is insufficient in performance.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a personal identification device that eliminates the drawbacks of the face identification device using a face and a fingerprint.

A personal identification device according to the present invention includes a control unit that captures a user's face information by a camera and compares it with registered data to determine the identity, and a fingerprint that captures a user's fingerprint and matches the registered data to determine the identity. A collation unit, and a vertically long mirror that is installed in a position where the user can confirm his / her face when the user faces the camera at a position where an appropriate face image can be captured , and The operation information collated with the fingerprint by the fingerprint collation unit is used to generate timing for capturing user face information.

According to this invention, the fingerprint collation unit uses the operation information collated by the fingerprint collation unit that detects that the finger is placed on the finger placement unit of the fingerprint collation unit as the timing to capture the face image with the camera. When a finger is placed on the finger placement part, a face image can be captured. When placing a finger on the finger placement unit, the user is away from the camera by the length of his arm, and a face image having a stable size can be obtained at all times. Further, when placing a finger on the finger placement unit, the user rarely closes his eyes or looks away, and often looks at the finger placement unit. Therefore, a face image suitable for identification of the face image can be obtained. As a result, the face image clipping process and the face image selection process can be greatly reduced, so that the control unit can be configured at a low cost, and at the same time, an individual using both the face identification result and the fingerprint matching result. Since identification is performed, identification performance can be improved.

Embodiment 1 FIG.
Embodiment 1 FIG.
Hereinafter, the personal identification device according to Embodiment 1 of the present invention will be described with reference to the external view of the device in FIG. 1, the table in FIG. 2, and the flowchart in FIG. In FIG. 1, a personal identification device 1 according to the present invention includes a camera 2 that captures a face image, a finger placement unit 4 of a fingerprint collation unit, a lighting device 5 that illuminates the brightness of a user's face to a certain level, and his / her face. Is a box 3 in which a vertically long mirror 6 is housed. A camera 2 is disposed on the front surface of the box 3, and an illumination device 5 is disposed in the vicinity of the camera 2. Further, a finger rest portion 4 is provided below the camera 2 within 10 cm, and a finger is placed on the finger rest portion 4 to capture fingerprint data.

  A vertically long convex mirror 6 that is curved in the vertical direction is attached to the side of the camera 2 and the finger holder 4 along the front surface of the box 3. By making the mirror 6 into a convex shape, even if the vertical dimension of the mirror 6 is reduced, it is possible to cope with a short user to a tall user. In addition, the mirror 6 is installed at a position where the user's face is reflected when the user stands at the optimal shooting position in front of the camera 2.

  Although not shown, the personal identification device 1 includes a face identification unit including a camera 2 and a control unit that processes and collates images of the camera 2, and a fingerprint that collates fingerprints obtained by the finger placement unit 4. The collation part and the control part which controls and processes the illumination 5 are provided.

Next, the operation will be described. When the user stands so that his / her face is reflected in the mirror 6 toward the camera 2 of the personal identification device 1, the user is required to place his / her finger on the finger placement unit 4. Hereinafter, operations of face identification, fingerprint collation, and illumination control will be described with reference to the flowchart of FIG. In step S1, it waits for a finger to be placed on the finger placement unit 4. If no finger is placed, return to start. When the finger is placed, in S2, the fingerprint collation unit collates the fingerprint based on the registered data, identifies the individual, and obtains a personal number. In S3, the height information of the face corresponding to the personal number is obtained using the table of FIG. 2, and the face data registered corresponding to the personal number is obtained in S4. Operation information collated by the fingerprint collation unit is detected, and using this as a trigger, the camera 2 is operated to capture a face image in S6. At this time, in S5, the illumination 5 is turned on to illuminate the user's face. In S7, the face height information obtained in S3 is used to cut out the face portion.

  In S8, the quality of the cut face image is determined. If the face image is good, the process proceeds to S9 and the illumination 5 is turned off. In S10, the face image is determined using the face data obtained in S4. In S11, an overall discrimination result is obtained from the fingerprint collation result and the face image discrimination result. In S12, the comprehensive discrimination result is output, and the process returns to the start.

In the above operation, the first feature of the invention, the finger on the finger rest portion 4 instructions are built, the operation fingerprint verification unit performs the fingerprint verification by detecting that the finger is placed, which is the fingerprint matching The information is used as timing when the face image is captured by the camera 2. For this reason, a face image can be captured when a finger is placed on the finger placement unit 4 of the fingerprint collation unit. When placing a finger on the finger placement unit 4, the user is separated from the camera 2 by the length of the arm, and a face image having a stable size can be obtained at all times. Has the effect of reducing Further, when placing a finger on the finger placement unit 4, the user rarely closes his eyes or looks away, and often looks at the finger placement unit 4. Therefore, a face image suitable for face image identification can be obtained, and a face orientation and eye orientation correction effect can be expected. In addition, since it is not necessary to always capture video and continue to determine the presence or absence of a user, power consumption can be reduced.

  A second feature of the present invention is that the illumination device 5 is controlled to be turned on only when the fingerprint collation unit operates and a face image is captured. For this reason, the lighting time of the lamp for illumination can be significantly reduced, and there is an effect of energy saving and extending the life of the lamp. In addition, there is also an effect of notifying the user that the face image is captured.

  The third feature of the present invention is that the camera 2 is installed within 10 cm of the finger rest 4. 10 cm is an allowable value considering the field of view of the camera and the size of the human face. According to this, the user's face staring at the finger placement unit 4 can be photographed from the front, and a stable face image can be obtained.

  The fourth feature of the present invention is that a mirror 6 adjusted to reflect his / her face when the user stands in front of the camera is installed. If the user places his / her finger on the finger rest 4 in a state where his / her face is reflected in the mirror 6, a face image with little lateral displacement can be obtained, and the cut-out time of the face image can be shortened. it can.

  The fifth feature of the present invention is that the mirror 6 has a vertically long shape that is convex in the vertical direction. Thereby, it can be used regardless of the height of the user.

  A sixth feature of the present invention is that the height information of the user's face is used for face extraction. As a result, the face cut-out process can be performed in a short time. That is, there is a correction effect in the height direction.

  As described above, according to the present invention, the face image cut-out process and the face image selection process can be greatly reduced, so that the face identification unit can be configured at low cost. Further, since the personal identification is performed using both the face identification result and the fingerprint collation result, the identification performance can be improved.

  The present invention can be applied to entrance / exit management, access management to personal computers, and the like.

It is a figure which shows the external appearance of the personal identification device which concerns on Embodiment 1 of this invention, (a) is a top view, (b) is a front view, (c) is a side view. FIG. 3 is a diagram showing a table used in the first embodiment. 3 is a flowchart for explaining the operation of the first embodiment.

Explanation of symbols

1 personal identification device, 2 camera,
3 boxes, 4 finger rests,
5 lighting devices, 6 mirrors.

Claims (2)

A control unit that captures the user's face information by camera and compares it with registered data to determine the identity, a fingerprint verification unit that captures the user's fingerprint and matches the registered data to determine the identity, and an appropriate face image When the user faces the camera at a position where the image can be taken, a vertically long mirror that is installed in a position where the user can check his / her face and which is curved in the vertical direction, the operation information collated by the fingerprint collation unit Is used for generating timing for capturing user face information. As the registration data, the position information in the height direction of the face is stored for each user, the position information in the height direction of the user's face is obtained from the personal information obtained as a result of fingerprint matching, and the face information The personal identification device according to claim 1, wherein the personal identification device is used for identification.

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