KR100869998B1 - Remote Iris Image Acquisition System - Google Patents

Abstract

The present invention relates to a far-field iris image acquisition system, comprising: a wide-angle camera for photographing an optical ray, a narrow-angle camera for photographing an infrared image, and a narrow-angle camera, which are mounted on a single PT (pan-tilt) device in a near-parallel parallel structure or a coincidence structure. A near-infrared illuminator is used to obtain an iris image of a remote user.

The present invention controls the panning and tilting of the wide-angle camera, the narrow-angle camera and the near-infrared illumination device at one time by using one PT device, so that the near-infrared illumination is narrow-angle camera so that the optical axis of the narrow-angle camera is always approximately parallel or coincident with the optical axis of the wide-angle camera. Since only the angle of view of the light is controlled, it is possible to obtain a high quality bright iris image even without separate lighting control. A low-light camera (eg, a VGA-level low light camera) that achieves a smaller scale and improves eye safety for lighting, and can acquire an iris image with less light than a conventional megapixel narrow angle camera. Alternatively, a near-infrared camera can be used as the narrow angle camera.

Description

Iris image acquisition system at a long distance}

The present invention relates to an iris image acquisition technology, and more particularly, a wide-angle camera for visual ray imaging, a narrow-angle camera for infrared imaging, and the narrow-angle camera mounted on one PT (Pan-Tilt) device in an optical axis near parallel structure or an optical axis matching structure. The present invention provides a distant iris image acquisition system for acquiring an iris image of a distant user, that is, an iris recognition subject using a near-infrared illumination device for a camera.

Among the iris image acquisition techniques commonly applied to conventional iris recognition systems, the portal system developed by Sarnoff Corporation under the product name "Iris On the Move" has two single-focus megapixels with no movement. A high-resolution camera is used, and the remote user is a system that passes through the gate that the camera is photographing, and has the advantage of showing a high processing speed (20 subjects / min), but it restricts the position and posture of the user passing through the gate. In particular, since the area photographed by the camera is the entire gate, a large number of infrared lights are attached to the entire gate to illuminate the entire photographing area, thereby increasing the overall system cost.

At Mitsubishi Corporation, on the other hand, Pan-Tilt (PT) units, two wide-field-of-view (WFOV) cameras and mega-pixel narrow-field-of-view (NFOV) cameras We have developed an iris image acquisition device using a distance prediction technique using the feature of face detection and extracted face feature points from a remote user in a relatively wide range of motion, but due to PT (Pan-Tilt) function While there is an advantage of having an operating range, a large-scale near-infrared light that exhibits high power characteristics is necessary to sufficiently light a shooting area of the megapixel narrow angle camera, and thus, it is difficult to control large-scale lights to produce high power. There is this.

The present invention is to solve the conventional problems as described above, an object of the present invention is to shoot a wide-angle camera and an infrared image to take a visible light image in a parallel structure parallel to the optical axis in one PT (Pan-Tilt) device A user who is far away using a near-infrared illuminator equipped with a narrow angle camera and mounted on the upper and lower sides or left and right sides of the narrow angle camera body to interlock with the narrow angle camera to illuminate the shooting area of the narrow angle camera only when the narrow angle camera is operated. In other words, it provides a distant iris image acquisition system for acquiring an iris image of an iris recognition subject.

Another object of the present invention is a pan-tilt (PT) device is equipped with a wide-angle camera for taking a visible light image and a narrow-angle camera for taking an infrared image in the optical axis coincidence structure, the narrow angle camera to work with the narrow angle camera Long-distance iris image, which is mounted on the top, bottom, left and right of the camera body and acquires the iris image of the remotely located user, that is, the iris recognition subject, by using a near-infrared lighting device that illuminates the shooting area of the narrow angle camera only when the narrow angle camera operates. It is to provide an acquisition system.

In order to achieve the object of the present invention as described above, the first embodiment of the far iris image acquisition system according to the present invention comprises a wide-angle camera for photographing the user sensed image; A narrow angle camera having a zoom lens and an auto focus function for capturing a user's iris image; A near-infrared illumination device mounted on the narrow angle camera body to illuminate a photographing area of the narrow angle camera only when the narrow angle camera is operated; A pan-tilt (PT) device for panning or tilting the wide-angle camera and the narrow-angle camera, which are mounted in a parallel structure near the optical axis; And panning or tilting the PT device such that the eye is positioned at the center of the captured image of the wide-angle camera according to a result of detecting the eye position after the face is identified from the user-sensing image captured by the wide-angle camera. After operating the lighting device and tilting the narrow angle camera until the eye is detected in the captured image of the narrow angle camera, detecting the eye and panning or tilting the narrow angle camera, the user's eyes are positioned at the center of the captured image of the narrow angle camera. And a main processor configured to change the zoom lens of the narrow angle camera to a zoom magnification necessary for acquiring an iris image having a size suitable for iris recognition, and to obtain an iris image by auto focusing.

In order to achieve the object of the present invention as described above, a second embodiment of the iris image acquisition system according to the present invention includes a wide-angle camera for photographing a user sensed image; A narrow angle camera having a zoom lens and an auto focus function for capturing a user's iris image; A near-infrared illumination device mounted on the narrow-angle camera body to illuminate a photographing area of the narrow-angle camera only when the narrow-angle camera is operated; A pan-tilt (PT) device for panning or tilting the wide-angle camera and the narrow-angle camera mounted in an optical axis matching structure; Mirrors which are arranged in front of the wide-angle camera and the narrow-angle camera and composed of a single or a plurality of mirrors for transmitting or reflecting visible light or transmitting or reflecting infrared rays to match the optical axes of the wide-angle camera and the narrow-angle camera. absence; And panning or tilting the PT device such that the eye is located at the center of the captured image of the wide-angle camera according to a result of detecting the eye position after the face is identified from the user-sensing image captured by the wide-angle camera. Panning or tilting the narrow angle camera while operating a near-infrared lighting device, and when the user's eyes are positioned at the center of the captured image of the narrow angle camera, the zoom lens of the narrow angle camera is changed to a zoom ratio necessary for obtaining an iris image having a size suitable for iris recognition. And a main processor for acquiring an iris image by adjusting auto focus.

As described above, the present invention is a narrow angle camera for infrared iris imaging by controlling the panning and tilting of the wide-angle camera and the narrow angle camera and the narrow-angle camera and the near-infrared illumination device for the narrow-angle camera with one PT device at one time. The optical axis of is always parallel or coincident with the optical axis of the wide-angle camera so that the near-infrared illumination controls only the angle of view of the narrow-angle camera so that a high quality bright iris image can be obtained without additional lighting control. Since only the angle of view of the angle of view of the narrow angle camera is required, the lighting device can be implemented in a smaller size at a relatively low price compared to the prior art, while improving eye safety for lighting. Less light than pixel-level narrow angle cameras In addition, there is an advantage that can be used as a narrow angle camera, such as a low-light camera (eg, VGA low-light camera) or a near-infrared camera that can obtain an iris image.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

[First Embodiment]

Referring to FIGS. 1 and 2, the wide-angle camera 10 is a camera for capturing a visible light image. The wide-angle camera 10 captures a user's sensed image, and uses a camera having a lens having an angle of view of 30 ° or more to a general color camera. desirable.

The narrow angle camera 20 is a camera for photographing an infrared image through visible light blocking and an infrared ray transmission filter. The narrow angle camera 20 is equipped with a zoom lens and an auto focus function to capture a user iris image.

The narrow angle camera 20 is preferably attached to the upper or lower end of the wide angle camera 10 in parallel with the optical axis in the distance X apart.

The narrow angle camera 20 has an infrared wavelength compared to a low light camera (eg, a VGA low light camera) or a general surveillance camera that amplifies a small amount of electrical signal generated by a CCD sensor when a small amount of light is received to obtain a brighter image than a general camera. It is preferable to use a near-infrared camera having high reactivity.

The narrow angle camera 20 preferably uses a camera having a zoom lens having an angle of view of 1 ° to 5 ° to a low light camera that can obtain a brighter image than other cameras even in low light. For reference, the narrow angle camera ( 20) If you use a low-light camera with a higher resolution than a VGA-level low-light camera, you can use a short focus lens instead of a zoom lens.

The near-infrared illumination device 30 is mounted on the narrow angle camera 20 to interlock with the narrow angle camera 20 to illuminate the photographing area of the narrow angle camera 20 only when the narrow angle camera 20 is operated.

The near-infrared illumination device 30 preferably has an irradiation angle as much as illuminating the area photographed by the narrow angle camera 20. For example, as described above, the near-infrared illumination device 30 has an irradiation angle of 5 ° with respect to the narrow angle camera having a maximum angle of view of 5 °. It uses the near-infrared lighting apparatus which has.

As the near-infrared illumination device 30, as shown in (a) to (d) of FIG. 2, the narrow angle camera 20 is mounted to any one of the upper, lower, left, and right of the narrow angle camera 20 body. A single illumination device that illuminates the shooting area of the narrow angle camera 20 can be used only when it is operating, in which case the reflected light can be made above or below the iris that is not used for iris recognition.

As shown in (e) and (f) of FIG. 2, the near-infrared illumination device 30 is mounted on the upper and lower sides or left and right sides of the narrow angle camera 20 so that the narrow angle camera 20 only operates when the narrow angle camera 20 operates. A plurality of lighting devices may be used to illuminate the photographing area of the camera, and in this case, the illumination reflection light formed on the user's glasses may be avoided by alternating lighting devices located above, below, left, and right of the body of the narrow angle camera 20.

The pan-tilt (PT) device 40 pans or tilts the wide-angle camera 10 and the narrow-angle camera 20 mounted in a parallel structure near the optical axis.

The wide-angle camera 10 mounted on the PT device 40, the narrow-angle camera 20, and the near-infrared illumination device 30 mounted on the narrow-angle camera 20 all face the same direction.

The main processor 50 is configured such that the eye is located at the center of the captured image of the wide-angle camera 10 according to a result of detecting the eye position after the face is identified from the user-sensed image captured by the wide-angle camera 10. After panning or tilting the PT device 40, the near-infrared illumination device 30 is operated and the narrow angle camera 20 is tilted until the eye is detected in the captured image of the narrow angle camera 20 to detect the eye. After panning or tilting the narrow angle camera 20, the user's eyes are positioned at the center of the captured image of the narrow angle camera 20, the zoom lens of the narrow angle camera 20 is used to acquire an iris image having a size suitable for iris recognition. An iris image is obtained by varying the required magnification and auto focusing.

The main processor 50 is the narrow angle camera 20 by using the distance (Z _distance ) information between the wide-angle camera 10 and the user obtained by the Z distance measuring device mainly used in a conventional iris image acquisition system. The initial value for the accuracy of the process of varying the auto focusing of the zoom lens to the zoom magnification required for iris image acquisition of a size suitable for iris recognition can be calculated. In addition, Z distance a distance between the wide-angle camera 10 and the user obtained by the measuring device (Z _Distance), or restrict the user's location and the distance between the wide-angle camera 10 and the user obtained (Z _Distance), wide-angle camera Proximity parallel distance (X _distance ) between 10 and narrow angle camera 20, focal length of _{lens of} wide-angle camera 10 ( _{focal length of lens} f), and pixel size (x) in the captured image of wide-angle camera 10 _The center of the wide-angle camera 10 is panned and tilted so that the center of the captured image of the wide-angle camera 10 comes to eye using Equation 1 showing a proportional relationship with respect _{to the pixel size} in the image. If the eye is positioned above the eye, that is, above the x pixel obtained by Equation 1, the eye may be automatically included in the angle of view of the narrow angle camera 20. In addition, the initial value for the accuracy of the process of varying the auto-focus adjustment of the zoom lens of the narrow angle camera 20 to the zoom magnification necessary for obtaining an iris image of a size suitable for iris recognition can be calculated.

Z _distance : X _distance = f _{Focal length of the lens} : x _{Pixel size in the image} (x _{Pixel size in the image} = X _distance × f _{Focal length} / Z _{distance in the lens} )

The main processor 50 controls the operation of the wide-angle camera 10, narrow angle camera 20, near-infrared illumination device 30, PT device (40).

The main processor 50 finds a face of the user through a face detection method (eg, AdaBoost, light reflection tracking, PCA, ICA, etc.) in the user sensed image captured by the wide-angle camera 10. Can be verified. When the face is detected and confirmed, the eye position method (eg, AdaBoost, light reflection tracking technique, histogram, etc.) may find or confirm the eye position or the eye.

The main processor 50 may transfer the obtained iris image to a separate iris recognition system to perform iris recognition, or may perform iris recognition using an iris image obtained by directly performing an iris recognition algorithm.

The far iris image acquisition system according to the first embodiment of the present invention configured as described above operates as follows.

First, as shown in FIG. 3, assuming that the narrow angle camera 20 is mounted at the lower end of the wide angle camera 10 by a distance X to the PT device 40 in an optical axis near parallel structure. Assuming that 50 has an iris recognition function.

Referring to FIG. 4, the main processor 50 detects a moving object, for example, a user by generating a difference image from an existing background image from a user sensing image captured by the wide angle camera 10 (S10). A face is detected from the corresponding user detection image by using a face detection method (S20).

If the face is detected, the eye position is detected through the eye detection method described above (S30).

Thereafter, the PT device 40 is panned or tilted such that the eye is positioned at the center of the captured image of the wide-angle camera 10 according to a result of detecting the eye position (S40). In the case of FIG. 3, the wide-angle camera ( Panning and tilting the center of the photographed image of 10) to the determined eye position, and accordingly, the center of the photographed image of the narrow angle camera 20 is located at the lower portion by a distance X than the eye.

Accordingly, the main processor 50 detects the eye while tilting the PT device 40 so that the eye is positioned at the center of the photographed image of the narrow angle camera 20 while operating the near-infrared illuminator 30 (S50). S60).

At this time, when the eye is not detected and the narrow angle camera 20 reaches the limit tilt angle, the main processor 50 determines that the position of the eye is found incorrectly, and returns to the step S30.

If the main processor 50 operates the near-infrared illumination device 30 from the start of driving the narrow angle camera 20 and detects the eye through tilting, the main processor 50 adjusts the focus of the narrow angle camera 20. After performing (S70), successively find and verify the eye position in the image taken by the narrow angle camera 20 (S80), and the eye at the center of the captured image of the narrow angle camera 20 at the verified eye position Then, the narrow angle camera 20 is finely panned or tilted again so that the eye position is adjusted (S90), and finally, the user's eyes are checked to be in the angle of view of the narrow angle camera 20 (S100). When the eye is detected by the narrow angle camera 20, an eye detection method (eg, a circular hough transform, a circular boundary tracking method, etc.) capable of finding a circular boundary is used.

In this case, if the eye is not detected, the main processor 50 returns to the process S80 to find the eye position again, and returns to the process S30 when the eye is not confirmed for a predetermined number of repetitions (N) (S110). .

On the other hand, when the eye is detected, the main processor 50 verifies the size of the iris area necessary for iris recognition in the image photographed by the narrow angle camera 20 and uses the zoom ratio necessary for acquiring an iris image having a size suitable for iris recognition. The zoom lens of the narrow angle camera 20 is varied and auto focus is adjusted to finally obtain an iris image (S120, S130, and S140).

When the final iris image is acquired as described above, the main processor 50 performs iris recognition using the iris image obtained by directly performing an iris recognition algorithm (S150), and on the other hand, separates the obtained iris image. It can be delivered to the iris recognition system to perform iris recognition.

Second Embodiment

Referring to FIG. 5, the wide-angle camera 10 is a camera for capturing a visible light image. The wide-angle camera 10 captures a user's sensed image and preferably uses a camera having a lens having an angle of view of 30 ° or more to a general color camera.

The narrow angle camera 20 is a camera for photographing an infrared image through visible light blocking and an infrared ray transmission filter. The narrow angle camera 20 is equipped with a zoom lens and an auto focus function to capture a user iris image.

The narrow angle camera 20 has an infrared wavelength compared to a low light camera (eg, a VGA low light camera) or a general surveillance camera that amplifies a small amount of electrical signal generated by a CCD sensor when a small amount of light is received to obtain a brighter image than a general camera. It is preferable to use a near-infrared camera having high reactivity.

The narrow angle camera 20 preferably uses a camera having a zoom lens having an angle of view of 1 ° to 5 ° to a low light camera that can obtain a brighter image than other cameras even in low light. For reference, the narrow angle camera ( 20) If you use a low-light camera with a higher resolution than a VGA-level low-light camera, you can use a short focus lens instead of a zoom lens.

The near-infrared illumination device 30 is mounted on the body of the narrow angle camera 20 to interlock with the narrow angle camera 20 to illuminate the photographing area of the narrow angle camera 20 only when the narrow angle camera 20 is operated. Examines near-infrared rays around the user's face.

The near-infrared illumination device 30 preferably has an irradiation angle as much as illuminating the area photographed by the narrow angle camera 20. For example, as described above, the near-infrared illumination device 30 has an irradiation angle of 5 ° with respect to the narrow angle camera having a maximum angle of view of 5 °. It uses the near-infrared lighting apparatus which has.

As the near-infrared illumination device 30, as shown in (a) to (d) of FIG. 2, the narrow angle camera 20 is mounted to any one of the upper, lower, left, and right of the narrow angle camera 20 body. A single illumination device that illuminates the shooting area of the narrow angle camera 20 can be used only when it is operating, in which case the reflected light can be made above or below the iris that is not used for iris recognition.

As shown in (e) and (f) of FIG. 2, the near-infrared illumination device 30 is mounted on the upper and lower sides or left and right sides of the narrow angle camera 20 so that the narrow angle camera 20 only operates when the narrow angle camera 20 operates. A plurality of lighting devices may be used to illuminate the photographing area, and in this case, the light reflection light formed on the user's glasses or contact lenses may be avoided by alternating the lighting devices located above, below, left, and right of the body of the narrow angle camera 20.

The pan-tilt (PT) device 40 pans or tilts the wide-angle camera 10 and the narrow-angle camera 20 mounted in the optical axis coincidence structure.

The PT device 40 uses the camera bracket 40a to fix the wide-angle camera 10 and the narrow-angle camera 20 to be parallel or perpendicular to each other to form an optical axis coincidence structure.

The wide-angle camera 10 mounted on the PT device 40, the narrow-angle camera 20, and the near-infrared illumination device 30 mounted on the narrow-angle camera 20 all face the same direction.

The mirror member is composed of a single or a plurality of mirrors for transmitting or reflecting visible light or transmitting or reflecting infrared rays while being disposed in front of the wide angle camera 10 and the narrow angle camera 20. 10 and the optical axis of the narrow angle camera 20 to match.

Referring to FIG. 6A, the mirror member is 45 ° in front of the wide angle camera 10 and the narrow angle camera 20 fixed to the camera bracket 40a to be perpendicular to each other, as shown in FIG. 5. It may be configured as a single cold mirror that reflects the visible light of the wide-angle camera 10 in a state arranged at an inclined angle and transmits the infrared rays of the narrow angle camera 20.

Referring to (b) of FIG. 6, the mirror member is visible light of the wide-angle camera 10 in a state in which the mirror member is disposed side by side at an angle of inclination of 45 ° in front of the wide-angle camera 10 and the narrow angle camera 20. May be configured as a pair of cold mirrors for reflecting and transmitting infrared rays of the narrow angle camera 20. In this case, although not shown, the wide angle camera 10 and the narrow angle camera 20 are in parallel with each other. It is fixed to the camera bracket 40a.

Referring to FIG. 6C, the mirror member is 45 ° in front of the wide-angle camera 10 and the narrow-angle camera 20 fixed to the camera bracket 40a to be perpendicular to each other, as shown in FIG. 5. It may be configured as a single hot mirror that transmits the visible light of the wide-angle camera 10 in a state arranged at an inclined angle and reflects the infrared rays of the narrow angle camera 20.

Referring to FIG. 6D, the mirror member is visible in the visible light of the wide-angle camera 10 in a state in which the mirror member is disposed side by side at an angle of inclination of 45 ° in front of the wide-angle camera 10 and the narrow angle camera 20. A pair of hot mirrors for transmitting the hot mirrors and hot mirrors for reflecting the infrared rays of the narrow angle camera 20, or hot mirrors for transmitting visible light of the wide angle camera 10 and the narrow angle cameras ( 20 may be configured as a pair of general mirrors reflecting infrared rays. In this case, although not shown, the wide angle camera 10 and the narrow angle camera 20 are fixed to the camera bracket 40a in parallel with each other.

The main processor 50 ′ is configured to position the eye at the center of the captured image of the wide-angle camera 10 according to a result of detecting the eye position after the face is identified from the user-sensed image captured by the wide-angle camera 10. After panning or tilting the PT device 40, the panning or tilting of the narrow angle camera 20 while operating the near-infrared illuminator 30 causes the user's eyes to be positioned at the center of the captured image of the narrow angle camera 20. The zoom lens of the narrow angle camera 20 is changed to a zoom magnification necessary for obtaining an iris image having a size suitable for iris recognition, and auto-focus adjustment is performed to obtain an iris image.

The main processor 50 'is an iris image of a size suitable for iris recognition of a zoom lens of the narrow angle camera 20 using distance information acquired by a Z-distance measuring device mainly used in a conventional iris image acquisition system. An initial value for the accuracy of the variable and autofocusing process can be estimated at the zoom factor required for acquisition.

The main processor 50 ′ controls the operation of the wide-angle camera 10, the narrow angle camera 20, the near-infrared illumination device 30, the PT device 40, and the mirror member.

The main processor 50 ′ may detect a face of the user through a face detection method (eg, AdaBoost, illumination reflection tracking technique, PCA, ICA, etc.) in the user sensing image captured by the wide-angle camera 10. You can find or check it. When the face is detected and confirmed, the eye position method (eg, AdaBoost, light reflection tracking technique, histogram, etc.) may find or confirm the eye position or the eye.

The main processor 50 ′ may transfer the obtained iris image to a separate iris recognition system to perform iris recognition, or may perform iris recognition using an iris image obtained by directly performing an iris recognition algorithm.

The far iris image acquisition system according to the second embodiment of the present invention configured as described above operates as follows.

First, it is assumed that the main processor 50 'has an iris recognition function.

Referring to FIG. 7, the main processor 50 ′ generates a difference image from an existing background image from a user sensing image captured by the wide angle camera 10, and detects a moving object, for example, a user (S10 ′). In operation S20 ′, the face is detected from the corresponding user detection image by using the face detection method.

If the face is detected, the eye position is detected through the eye detection method (S30 ').

Thereafter, the PT device 40 is panned or tilted such that the eye is positioned at the center of the captured image of the wide-angle camera 10 according to a result of detecting the eye position (S40 ′). 20) looks at the eye area.

Subsequently, the main processor 50 ′ performs focus adjustment of the narrow angle camera 20 while operating the near-infrared illumination device 30 (S50 ′), and then the eye in the image captured by the narrow angle camera 20 in succession. Find and verify the position again (S60 ′), and adjust the eye position by finely panning or tilting the narrow angle camera 20 again so that the eye is exactly at the center of the captured image of the narrow angle camera 20 at the verified eye position. Then (S70 '), finally check whether the user's eyes are in the angle of view range of the narrow angle camera (20) (S80'). When the eye is detected by the narrow angle camera 20, an eye detection method (eg, a circular hough transform, a circular boundary tracking method, etc.) capable of finding a circular boundary is used.

At this time, if the eye is not detected, the main processor 50 'returns to the process S60' and finds the eye position again, and returns to the process S30 'when the eye is not confirmed for a predetermined number of repetitions (N). (S90 ').

On the other hand, when the eye is detected, the main processor 50 'verifies the size of the iris area necessary for iris recognition in the image photographed by the narrow angle camera 20, and the zoom magnification required for acquiring an iris image having a size suitable for iris recognition. By varying the zoom lens of the narrow angle camera 20 and performing auto focus control, an iris image is finally obtained (S100 ′, S 110 ′, and S 120 ′).

When the final iris image is obtained as described above, the main processor 50 ′ performs iris recognition using the iris image obtained by directly performing an iris recognition algorithm (S130 ′), and separately extracts the iris image obtained on the other hand. It can be delivered to the iris recognition system of the iris recognition.

The far iris image acquisition system according to the present invention described above is not limited to the above-described embodiments, and those skilled in the art without departing from the gist of the present invention as claimed in the following claims. Ramen has the technical spirit to the extent that anyone can make various changes.

1 is a first embodiment showing a far iris image acquisition system according to the present invention;

Figure 2 is an embodiment showing a state in which the near-infrared illumination device is mounted on the narrow angle camera according to the present invention.

Figure 3 is an embodiment showing an optical axis near parallel structure of the wide-angle camera and the narrow-angle camera according to the present invention.

4 is a flowchart illustrating an operation of a far iris image acquisition system according to a first embodiment of the present invention.

Figure 5 is a second embodiment showing a far iris image acquisition system according to the present invention.

6 is an embodiment showing an optical axis matching structure of a wide-angle camera and a narrow-angle camera according to the present invention.

7 is a flowchart illustrating an operation process of a far iris image acquisition system according to a second embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: wide angle camera 20: narrow angle camera

30: near infrared illuminator 40: PT device

40a: camera bracket 50,50 ': main processor

Claims (9)

A wide-angle camera 10 for capturing a user sensed image; A low-angle camera or a near-infrared camera, the narrow angle camera having a zoom lens and an auto focus function to capture a user's iris image; A near-infrared illumination device (30) mounted to the body of the narrow angle camera (20) to illuminate the photographing area of the narrow angle camera (20) only when the narrow angle camera (20) operates; A pan-tilt (PT) device (40) for panning or tilting the wide-angle camera (10) and the narrow-angle camera (20) mounted in an optical parallel proximity structure; And The PT device 40 is positioned such that the eye is located at the center of the captured image of the wide-angle camera 10 according to a result of detecting the eye position after the face is identified from the user-sensing image captured by the wide-angle camera 10. After panning or tilting, the near-infrared illuminator 30 is operated and the narrow angle camera 20 is detected by tilting the narrow angle camera 20 until the eye is detected in the captured image of the narrow angle camera 20. If the user's eyes are positioned at the center of the captured image of the narrow angle camera 20 by panning or tilting the 20, the zoom lens of the narrow angle camera 20 is changed to a zoom ratio necessary for obtaining an iris image having a size suitable for iris recognition. A main processor 50 for auto focusing to obtain an iris image; Far iris image acquisition system, characterized in that consisting of. A wide-angle camera 10 for capturing a user sensed image; A low-angle camera or a near-infrared camera, the narrow angle camera having a zoom lens and an auto focus function to capture a user's iris image; A near-infrared illumination device (30) mounted to the body of the narrow angle camera (20) to illuminate the photographing area of the narrow angle camera (20) only when the narrow angle camera (20) operates; A pan-tilt (PT) device 40 for panning or tilting the wide-angle camera 10 and the narrow-angle camera 20 mounted in an optical axis matching structure; The wide-angle camera 10 is composed of a single or a plurality of mirrors for transmitting or reflecting visible light or transmitting or reflecting infrared rays in a state disposed in front of the wide-angle camera 10 and the narrow angle camera 20. A mirror member to match the optical axis of the narrow angle camera 20; And The PT device 40 is positioned such that the eye is located at the center of the captured image of the wide-angle camera 10 according to a result of detecting the eye position after the face is identified from the user-sensing image captured by the wide-angle camera 10. After panning or tilting, the narrow angle camera 20 is panned or tilted while the near-infrared illuminator 30 is operated so that the user's eyes are positioned at the center of the captured image of the narrow angle camera 20. A main processor 50 ′ for acquiring an iris image by varying a zoom lens to a zoom magnification necessary for acquiring an iris image having a size suitable for iris recognition and performing auto focus adjustment; Far iris image acquisition system, characterized in that consisting of. delete The narrow angle camera according to claim 1 or 2, wherein the near-infrared illumination device (30) is mounted at any one of the upper, lower, left, and right sides of the narrow angle camera (20) to operate the narrow angle camera (20). Far iris image acquisition system, characterized in that the single illumination device for illuminating the shooting area of (20). According to claim 1 or claim 2, wherein the near-infrared illumination device 30 is mounted on the upper and lower sides or left and right of the body of the narrow angle camera 20, and only when the narrow angle camera 20 is operated to capture the photographing area of the narrow angle camera 20. Far iris image acquisition system, characterized in that the illuminating a plurality of lighting devices. The narrow angle camera of claim 2, wherein the mirror member reflects the visible light of the wide angle camera 10 while being disposed at an angle of inclination of 45 ° in front of the wide angle camera 10 and the narrow angle camera 20. Far iris image acquisition system, characterized in that consisting of a single cold mirror that transmits infrared light (20). The method of claim 2, wherein the mirror member reflects the visible light of the wide-angle camera 10 in a state where the mirror member is disposed side by side at an angle of inclination of 45 ° in front of the wide-angle camera 10 and the narrow angle camera 20, Long range iris image acquisition system, characterized in that consisting of a pair of cold mirror (cold mirror) for transmitting infrared light. According to claim 2, wherein the mirror member is in front of the wide-angle camera 10 and the narrow angle camera 20 in a state inclined at 45 ° inclined to transmit visible light of the wide-angle camera 10 and the narrow angle camera Far infrared iris image acquisition system, characterized in that consisting of a single hot mirror reflecting. 3. The hot member of claim 2, wherein the mirror member is configured to transmit visible light of the wide-angle camera 10 while being disposed side by side at an angle of inclination of 45 ° to the front of the wide-angle camera 10 and the narrow angle camera 20. A pair of hot mirrors reflecting infrared rays of the narrow angle camera 20, or a hot mirror transmitting visible light of the wide angle camera 10 and the narrow angle camera 20 A distant iris image acquisition system, characterized in that it consists of a pair of general mirrors that reflect infrared light.

Images