JPH10268372A - Photographing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a personal identification device for making possible for a person to be identified to easily set his iris on the focus of a CCD camera. SOLUTION: The device is provided with a proximity sensor 4 for calculating a distance between the CCD camera 3 and the person to be identified, a beep generating part for transmitting a frequency corresponding to the calculated distance to a speaker 5, and the speaker 5 for outputting the beep in accordance with the frequency transmitted from the beep generating part, and also, the device is provided with a control part for controlling so that the beep may be outputted while reducing the frequency as the person to be identified comes from afar closer to the focal length of the CCD camera 3, and that the beep with the lowest frequency may be outputted when the person reaches the focal length, and that the beep may be outputted while increasing the frequency when the person to be identified comes closer to the CCD camera beyond the focal length.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a photographing apparatus.

[0002]

2. Description of the Related Art Conventionally, a technique using an iris has been attracting attention for personal identification. An "iris recognition system" disclosed in Japanese Patent Publication No. 5-84166 is disclosed as an example of such an identification technique.

[0003] The iris will be briefly described here. The pattern of the surface layer of the human eyeball, particularly the iris, is formed by a pattern such as a radial black streak or an outer contour around the pupil. The -n is completed in childhood and differs between the right eye and the left eye for each individual and even for the same person. Therefore, when this iris is used, personal identification ability is particularly excellent.

[0004] Since the iris is visible on the surface of the eyeball, it is possible to illuminate the iris, make it brighter, and capture the iris from a distance using a camera. It has the feature that it is unnecessary and hassle-free.

As a means for capturing the iris from a distance using a camera, a "human body" is identified from an image captured by the camera, and a "face" is extracted from the identified "human body".
Subsequently, the position of the "eye" is specified. Then, the iris of the "eye" is captured, only the iris pattern is captured, and the iris data of the person registered in advance is checked to confirm the identity.

Devices having the above functions include personal identification devices such as entrance / exit management devices installed at entrances and the like of confidential rooms. The personal identification device determines whether or not the iris data of the person registered in advance matches the iris pattern of the person to be identified, and sends the determination result to the host device. is there. Hereinafter, a process until the personal identification device acquires the iris data of the identified person will be described.

First, a person to be identified looks into a window of a reading unit provided in front of the apparatus. Then, the eye of the identified person is illuminated by the light, and the iris is acquired by the CCD camera. At this time, the person to be identified can see his / her eyes acquired by the CCD camera through the half mirror provided inside the apparatus and shown on the display inside the apparatus.

When the iris is focused on the focal point of the CCD camera, the time when the eye image reflected on the display is sharpest is determined. It moves so that it looks sharp. In addition to moving the face back and forth, the identified person can operate the operation unit to change the angle of the CCD camera. Then, when the iris is correctly focused on the focus of the CCD camera, the identified person presses the start switch.
Then, the iris obtained by the CCD camera is sent to the processing unit as iris data.

[0009]

In the above-mentioned conventional apparatus, there is no automatic focusing function, and the discriminator himself looks at the display so that his / her eyes can be clearly seen on the internal display. You had to move back and forth or change the angle of the camera. Therefore, there is a problem that it takes time to get used to. Also,
Since the discriminated person with low eyesight cannot see his or her own eye on the display, it cannot judge whether or not the iris is in focus on the CCD camera, and it takes time to perform the collation. There was a problem.

The above problem can be solved by equipping the apparatus with an automatic focusing function like a commercially available video camera. However, there is a problem that the mechanism becomes large and the cost increases. there were.

[0011]

According to the present invention, there is provided a photographing apparatus in which a camera captures an image of an identified person when the identified person comes to a focused position. The distance between the camera and the identified person is calculated, the guidance sound is changed according to the change in the distance, and the identified person is guided to a focused position by the change in the guidance sound.

The apparatus calculates the distance between the camera and the portion to be imaged, and changes the guidance sound in accordance with the change in the distance. on the other hand,
The identified person is guided to the guidance sound and moves to a position where he or she is focused on the camera.

[0013]

Embodiments of the present invention will be described with reference to the drawings. Elements common to the drawings are denoted by the same reference numerals. FIG. 1 is an explanatory view showing the structure of the personal identification device according to the embodiment, FIG. 2 is a block diagram showing a control system of the personal identification device according to the embodiment, and FIG. 3 is the output of the proximity sensor and the frequency of the beep sound. 6 is a graph showing the relationship of.

First, the structure of a personal identification device having a function of acquiring and comparing an iris of a person to be identified will be described. In FIG. 1, an optical unit 2 is provided in a personal identification device 1 indicated by a dashed line, and the optical unit 2
A direction adjusting cylinder 6, a CCD camera 3 for acquiring an iris of the identified person, and a proximity sensor 4 for detecting a distance between the eyes of the identified person
And a speaker 5 for outputting a beep sound. The personal identification device 1 further includes a CCD camera 3
A start switch 13 which is depressed when the iris and the iris are in focus, and a control unit 12 shown in FIG.

The direction adjusting cylinder 6 has an LED 7 connected to the control unit 12 and a light adjusting filter 8 built therein. Light from the LED 7 is converged by the light adjusting filter 8. The diameter and length of the direction adjusting cylinder 6 are such that the light of the LED 7 can be seen even if the eyesight of the identified person is somewhat low.

The CCD camera 3 has, as shown in FIG.
A CCD sensor 9 for capturing an image and a lens group 10 having a zoom function are built in. The CCD camera 3
The image processing unit 11 is connected to the image processing unit 11 shown in FIG. 2, receives an image taken by the CCD camera 3, extracts iris features from the image, and controls the iris data as iris data. 12 is transmitted.

The proximity sensor 4 includes a transmitting unit 4a and a receiving unit 4b.
It is composed of The transmitting unit 4a outputs an ultrasonic wave,
The receiver 4b receives the reflected sound from the identified person. Then, the proximity sensor 4 outputs a value corresponding to the distance between the CCD camera 3 and the identified person to the control unit 12 based on the intensity of the reflected sound or the time difference between the transmitted sound and the reflected sound. In addition, the proximity sensor 4 may be a distance sensor type other than an ultrasonic wave.

The speaker 5 is connected to a beep sound generator 14. The beep sound generator 14 raises or lowers the frequency in response to an instruction from the controller 12, and sends the beep sound to the speaker 5. Transmit frequency. Then, the speaker 5 outputs a beep sound corresponding to the designated frequency.

The start switch 13 is also connected to the control unit 12.
When the button is pressed, a signal indicating that the button is pressed is transmitted to the control unit 12.

In this embodiment, as shown in FIG. 3, as the person to be identified approaches the focal length A of the CCD camera 3 from a distance, the control unit 12 sends a beep sound generating unit. 14 is instructed to lower the frequency and output a beep sound. And CCD camera 3
When the identified person reaches the focal length A, that is, when the object distance becomes equal to the focal length, the control unit 12 outputs a beep sound of the lowest frequency to the beep sound generation unit 14. Is instructed. On the other hand, when the person to be identified further approaches the CCD camera 3 beyond the focal length A of the CCD camera 3, the control section 12 increases the frequency to the beep sound generation section 14 to output a beep sound. Is instructed. Therefore, if the identified person moves to a position where the beep sound output from the speaker 5 can be heard at the lowest level, the identified person's eyes can reach the focal length A of the CCD camera 3.

Next, the operation of the iris acquiring operation of the identified person in the above configuration will be described with reference to FIGS. 1, 2 and 3. FIG.

The iris acquisition includes a registration operation and a recognition / collation operation. In this embodiment, since both operations are the same, the iris acquisition operation will be described as the collation operation.

When an instruction to start an iris acquisition operation is received from the host device (not shown) to the personal identification device 1, the control unit 12
Turns on the LED 7. The light of the LED 7 is converged by the light adjusting filter 8. The identified person adjusts the face direction to the CCD camera 3 so that the LED 7 of the direction adjusting cylinder 6 can be seen.

Next, the control unit 12 instructs the proximity sensor 4 to start operation. Then, the transmitting unit 4a of the proximity sensor 4 outputs an ultrasonic wave, and the reflected sound from the identified person is received by the receiving unit 4b. Then, the proximity sensor 4 detects the CCD based on the intensity of the reflected sound or the time difference between the transmitted sound and the reflected sound.
A value corresponding to the distance between the camera 3 and the person to be identified is calculated and output to the control unit 12.

The control unit 12 issues an instruction corresponding to the distance to the beep sound generation unit 14 in accordance with the calculation result of the distance from the proximity sensor 4. In response to this instruction, the beep sound generator 14
Transmits the frequency corresponding to the instruction to the speaker 5, and
The car 5 outputs a beep sound.

The identified person starts to move to the position where the lowest beep sound occurs in accordance with the beep sound that changes with his / her movement. At this time, for example, assuming that the identified person gradually approaches the focal length A from a distance, the control unit 12 instructs the beep sound generation unit 14 to lower the frequency. Then, the beep sound generator 14 transmits the frequency based on the instruction to the speaker 5, and outputs a beep sound from the speaker 5.

The control unit 12 detects, via the proximity sensor 4, that the identified person continues to approach the focal length and reaches the focal length A. Then, the control unit 1
2 instructs the beep sound generator 14 to make the frequency the lowest. On the other hand, the control unit 12 informs that the identified person has exceeded the focal length A and has come closer to the CCD camera 3.
Is detected, the beep sound generator 14 is instructed to increase the frequency. Then, the discriminating person recognizes that the beep sound has increased, and moves his / her face to a position where the beep sound output from the speaker 5 is lowest, thereby making his / her own eyes. Adjust the position.

Then, the subject stops moving at the position where the beep sound is heard at the lowest level, and presses the start switch 13. When detecting that the start switch 13 has been pressed, the control unit 12 instructs the CCD camera 3 to capture an image. Then, the CCD camera 3 takes an image of the eye whose focus position is accurately adjusted by the CCD sensor 9 and the lens group 10, and transmits an image of the taken eye to the image processing unit 11. The image processing unit 11 performs iris feature extraction from the input image and transmits the iris data to the control unit 12 as iris data.
Then, the control unit 12 performs a collation operation based on the registered iris, and sends a determination result to the host device.

In this embodiment, the frequency of the beep sound is changed in accordance with the forward and backward movements of the identified person, and the lowest frequency is reached when the identified person reaches the focal length. Since the beep sound is output, the person to be identified can adjust the iris to the focus of the CCD camera 3 only by moving to the position where the beep sound can be heard lowest. As a result, it is possible to easily adjust the iris to the focus of the CCD camera 3 even if the eyesight of the person to be identified is reduced. Also, since there is no need to provide an automatic focusing function, a low-cost CCD camera 3 may be used, and further, since there is no need to install a display, the cost of the apparatus can be reduced.

[0030]

Since the present invention is configured as described above, it has the following effects.

The distance between the camera and the subject is calculated, the guiding sound is changed in accordance with the change in the distance, and the subject is guided to a focused position by the change in the guiding sound. If the person changes the position according to the guidance sound, the person can move to a position where the camera is in focus. As a result, the identified person can easily focus himself on the camera.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a structure of a personal identification device according to an embodiment.

FIG. 2 is a block diagram illustrating a control system of the personal identification device according to the embodiment;

FIG. 3 is a graph showing the relationship between the output of the proximity sensor and the frequency of the beep sound according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Personal identification device 3 CCD camera 4 Proximity sensor 5 Speaker 12 Control part 14 Beep sound generation part

Claims (3)

[Claims] When an identified person comes to an in-focus position, a camera calculates a distance between the camera and the identified person in a photographing device for photographing the identified person, and guides the distance in accordance with the change in the distance. An imaging device that changes a sound and guides the identified person to a focused position by the change of the guidance sound. 2. When an identified person comes to a focused position, a camera calculates a distance between the camera and the identified person in a photographing apparatus for photographing the identified person, and according to a change in the distance, calculates a distance between the camera and the identified person. An imaging device that changes the frequency of the beep sound and guides the identified person to a focused position by the change of the beep sound; 3. The beeper is output at a lower frequency as the identified person approaches the in-focus position from a distance, and the beep sound is output at the lowest frequency at the in-focus position. 3. The photographing apparatus according to claim 2, wherein the beep sound is output at a higher frequency as the discriminated person further approaches the camera beyond the in-focus position.