KR20050024485A - Hybrid Shooting Device for Iris Zoom Camera and the Method - Google Patents

Abstract

PURPOSE: A picturing device of a hybrid-typed iris zoom camera and a method thereof without a limitation of height and distance are provided to obtain an iris image stably and conveniently by moving the zoom camera to a position of an eyelevel after analyzing the eyelevel and the current distance, and vertically moving the zoom camera with drive of a tilt part, and controlling a zoom lens and a focal lens. CONSTITUTION: A carrier(50) is attached to the zoom camera(70) picturing a face image and the iris image to a supporting frame(55) in a state that the zoom camera is vertically tilted, is equipped with the tilt part comprising gears(61,62) and a tilt motor(60) for vertically rotating the zoom camera, and is vertically inserted/moved along a vertical guide shaft(40). A vertical carrier comprises a linear motor carrier(12), linear motor fixers(10,11), a linear scale(21), and a linear encoder(20). A controller(1) detects the eyelevel and the current distance of an object by analyzing the face image inputted from the zoom camera, controls the linear motor carrier by referring to position information of the linear scale, and detects/obtains the iris image by controlling the tilt part and the zoom/focal lens with reference for the current distance.

Description

Hybrid shooting device for iris zoom camera and the method

The present invention relates to an iris zoom camera photographing apparatus, and more particularly, to an iris zoom camera photographing apparatus for obtaining a stable iris image of a user.

In general, the purpose of acquiring the iris image may be used in an authentication system for identification, and such a camera system is used as a means of controlling access to specific places or access to specific information.

In addition, in the medical examination using the iris, the iris image is acquired by analyzing the high-quality iris image by using the iris camera and diagnosing the health condition of the subject.

In general, such an iris camera can be classified into a manual and an automatic system. In the case of a manual system, a photographer needs to bring his or her iris close to the camera. It is a system that provides a photographing position of the photographer and automatically finds and photographs the iris of the subject by panning or tilting up and down and up and down.

In the case of the present invention, a semi-automatic system corresponds to the left and right, that is, the X position is to be adjusted by the subject, and the upper and lower, Y position is to be automatically adjusted to the camera photographing device. The camera movement function to automatically adjust the existing Y position is a function of tilt.

Conventional tilting methods have been used to change the angle of incidence of the camera. This conventional tilting method has the advantage of miniaturizing the camera and fixing it at a specific position. However, if the height of the photographer is different from each other, the tall photographer and the short photographer are each side of the camera. There was a downside to looking down or looking up. In addition, the iris image is very difficult to obtain a stable and consistent image under the influence of optical interference and eyebrows when the subject looks down or looks up without looking at the front.

The present invention proposes a hybrid-type iris zoom camera photographing apparatus that can be obtained to solve the problems as pointed out above to obtain a more convenient and stable iris image.

In order to achieve the object of the present invention, by analyzing the face image of the subject incident to the zoom camera to calculate the eye height and current shooting distance of the subject, so that the analyzed eye height and the height of the incident axis of the zoom camera to match The zoom camera is moved vertically by the vertical movement of the linear motor mover. If the detected eye height is outside the vertical movement range of the linear motor mover, the zoom motor is moved to the linear motor mover so as to be as close as possible to the analyzed eye level. Then, the zoom camera was moved vertically, and the zoom camera was driven up and down by driving the tilting unit installed in the zoom camera so that the incident axis of the zoom camera was suitable for the incident image of the detected eye level. .

 Subsequently, the iris is detected and photographed by real-time adjustment of the zoom camera zoom and focus with reference to the analyzed photographing distance. In this way, the zoom camera's vertical movement means and tilt can be used to increase the vertical shooting range of the device compared to the height of the device, while limiting the height or the shooting distance within a certain range while the subject faces the front horizontally. In order to solve the above problems by making it possible to obtain an iris image stably and conveniently, it was a technical problem.

Hereinafter, with reference to the drawings present a specific embodiment of the present invention.

In the present invention, the iris image taken on the horizon of the camera with respect to the subject's iris is generated by focusing on the generally stable, and the subject looks at the horizontal front and instead, the zoom camera is positioned to be horizontal with respect to the eye level of the subject. When vertically moved up and down, the photographer can easily access the device, and unlike the conventional tilt-based Y-axis movement, the iris image can be incident on the horizontal line, making it more stable and stable. The iris image can be obtained conveniently. In addition, when the subject's eye height is outside the vertical movement range of the zoom camera, the zoom camera is further configured to be rotated up and down by tilting the tilt motor according to a conventional method, thereby providing a wider vertical shooting range compared to the height of the device. .

1 is a front structural diagram of a hybrid iris zoom camera photographing apparatus according to the present invention, showing a structure of the hybrid iris zoom camera photographing apparatus according to the present invention seen from the front.

Figure 2 is a side perspective view of the hybrid iris zoom camera photographing apparatus according to the present invention, showing a structure seen from the side of the hybrid iris zoom camera photographing apparatus according to the present invention.

Figure 3 is a side perspective view illustrating a tilt operation of the hybrid iris zoom camera photographing apparatus according to the present invention showing how the vertical movement and the tilt operation is implemented.

4 is a conceptual diagram illustrating a tilt operation of the hybrid iris zoom camera photographing apparatus according to the present invention, which shows how the vertical photographing range is widened by vertical transfer and tilt.

1 and 2, the hybrid iris zoom camera photographing apparatus according to the present invention,

A main body frame 2 having an open rectangular front portion;

A pair of vertical guide shafts 40 having end portions fixedly mounted to upper and lower portions of the main body frame 2 at a predetermined distance from each other;

A zoom camera 70 for capturing a subject's face image and an iris image is attached to the support frame 55 so as to tilt up and down, and the gears 61 and 62 and the tilt to rotate the zoom camera up and down. A carrier (50) attached to the tilting unit formed of a motor (60), having a hollow bush at its side, and inserted into the vertical guide shaft (40) to enable vertical transfer;

A linear motor mover 12 fixed to move the carrier 50 vertically, and a linear motor mounted vertically on the upper rear surface of the main body frame 2 and linearly moving the linear motor mover 12 by a controller 1. A motor stator 10, 11, a linear scale 21 provided on the rear surface of the main body frame 2 on the side of the linear motor stator 10, 11, and a linear motor mover 12 side, which is provided on the linear scale. (21) vertical movement means composed of a linear encoder header 20 for transmitting the position information to the control unit;

Analyzing the face image of the front side incident from the zoom camera to detect the eye height and the current photographing distance of the subject, the linear scale 20 so that the incident axis height of the zoom camera coincides with the detected eye height position of the subject The linear motor mover 12 is vertically controlled with reference to the positional information of 21, and when the detected eye level is outside the vertical movement range of the linear motor mover 12, the incident axis of the zoom camera is A controller (1) for driving the zoom camera tilt unit to be suitable for the entrance of the eye level, and to detect and acquire the iris image by adjusting the zoom lens and the focus lens of the zoom camera with reference to the detected current photographing distance. Included.

The linear motor including the linear motor stator 10 and 11 and the linear motor mover 12 is an AC three-phase synchronous motor, and the linear motor stator 10 and 11 has a permanent magnet 11 having a plate 10. The linear motor mover 12 is composed of a core and a coil, and is moved by the suction force of the electromagnet of the mover and the permanent magnet of the stator by the application of alternating three-phase electricity of the control unit 1. This is done and the speed is controlled by frequency modulation.

At this time, the controller detects the position information through the linear scale 21 and the encoder 20 mounted on the main body frame for accurate position control of the linear motor mover, and performs feedback control for accurate position movement.

On the other hand, in the present embodiment, an AC three-phase synchronous linear motor having a relatively simple structure and strong driving force is used as the linear motor. However, in addition to the AC three-phase synchronous motor, there is no need for an AC induction linear motor or a linear scale. You can also use a linear pulsed motor with a mode of Open Loop.

In addition, the vertical movement means is supported by a gear pulley in the upper and lower parts of the main body frame, a timing belt screwing the carrier on one side, and a fixed type mounted on the upper rear surface of the main body frame to a rotating motor for driving the gear pulley Can be configured.

In addition, the vertical movement means is supported by the upper and lower parts of the main frame and the ball screw rod for moving the carrier vertically vertically by the rotation of the screw, and fixed to the lower portion of the main frame and axially coupled to the ball screw rod It can be configured as a rotary motor.

The carrier 50 is fixed on the linear motor mover 12, and the zoom camera mounted on the carrier is composed of a zoom lens group, a focus lens group 71, and a solid state image pickup device 72, and the control unit 1 ) And transmits the face image and the iris image of the subject to the controller. The zoom lens group and the focus lens group 71 are generally composed of lenses corresponding to about 30x zoom to enlarge the iris to be incident on the solid state image pickup device 72. In addition, the zoom camera is mounted to the carrier together with the gears 61 and 62 and the tilt motor 60 to enable tilt operation up and down.

Here, the linear motor mover 12 serves to vertically move so that the incident axis height of the zoom camera 70 coincides with the eye height of the subject.

The tilt part serves to widen the height of the subject by adding a tilt implementation when the subject is outside the vertical movement range of the linear motor mover 12.

The vertical guide shaft 40 is a pair, and is inserted such that the linear motor mover 12 is vertically movable, and a constant distance from the linear motor drivers 10 and 11 when the linear motor mover 12 moves vertically. In order to maintain this, the linear motors are respectively configured on the left and right sides of the center.

On the other hand, the linear motor mover 12 and the linear scales 20, 21 mounted on the side surfaces of the linear motor stators 10 and 11 serve to transmit the vertical position of the linear motor mover 12 to the controller. .

Hereinafter, the operation of the hybrid iris zoom camera photographing apparatus according to the above-described configuration will be described with reference to FIGS. 1 to 4.

First, after the user approaches the front of the camera device, the user continuously adjusts the zoom camera by the control unit when the user aligns the left and right sides of the iris with the camera center vertical line along the X axis. The zoom camera transmits the face image of the front subject to the controller. In this case, the zoom magnification is determined so that the zoom camera is suitable for taking a face image.

Here, the controller analyzes the eye level of the subject and the current photographing distance which is the distance from the zoom camera to the subject's face in the transmitted face image. At this time, the control unit obtains a plurality of face images in order to more accurately analyze the eye height and the current shooting distance of the subject, while obtaining a plurality of face images while changing the vertical position of the zoom camera. As another method of accurate analysis of the current shooting distance, it is possible to acquire a plurality of face images by analyzing only the zoom magnification at the same height position, and analyze the more accurate current shooting distance.

Subsequently, when the eye level and the current photographing distance of the subject are analyzed, the control unit adjusts the linear motors 10 and 11 such that the zoom camera incident axis mounted on the linear motor mover 12 matches the eye height position of the analyzed subject. , 50, to move the linear motor mover 12 vertically.

In this case, when the analyzed eye height is outside the vertical moving range of the zoom camera, the zoom camera is vertically moved by vertical moving means so that the analyzed eye height and its incident axis are as close as possible. The zoom camera tilt part is driven so that the incident axis of the zoom camera is suitable for the incident image of the detected eye level to be incident, thereby rotating the zoom camera vertically.

Subsequently, after the incident axis of the zoom camera 70 is parallel to the eye height of the subject, the controller adjusts the magnification of the zoom lens to be suitable for capturing the iris image with reference to the detected current photographing distance. Adjust the focus lens to obtain a clear image. Here, the focus detection method may use a predetermined focus position value according to the current shooting distance or directly analyze the contrast value of the iris image.

Subsequently, when the zoom lens and the focus lens of the zoom camera are in a suitable state for capturing an iris enlarged image, the control unit simultaneously captures the iris image through the solid state image pickup device 72 of the zoom camera.

Here, when the overall main operation is performed, the height of the incident axis of the zoom camera reaches the eye height of the subject by the vertical movement of the linear motor mover 12, but if the vertical movement of the zoom camera does not reach the eye height of the subject The zoom camera is rotated up and down by driving the zoom camera tilt part so that an image of an eye level is incident (see FIG. 4). When the zoom lens is zoomed in at the corresponding magnification to continuously enlarge the iris, and at the same time, the focus lens is adjusted so that the image falls into a range of generally clear depths, the iris image is acquired through the solid-state image pickup device 72 of the zoom camera. Done.

On the other hand, the height position of the zoom camera in the standby state is located at its center position of the effective moving distance of the zoom camera among the device heights. This is to quickly reach the subject's eye level in the next shooting.

When the above operation is completed, one end of the iris photographing operation of the hybrid iris zoom camera photographing apparatus is completed.

As described above, the embodiments of the present invention may be variously modified, and other embodiments with different components are also included in the spirit of the present invention.

As described above, according to the present invention, in photographing the iris of the subject, the subject faces the front face and analyzes the eye height and the current photographing distance of the subject by image analysis of the controller, and then the position of the eye height. When the zoom camera is moved by driving the linear motor, if the eye level of the subject is out of the range of the linear motor mover, the tilt camera mounted with the zoom camera is moved to move the zoom camera up and down. By adjusting the zoom lens and the focus lens to capture the iris image, by using the vertical movement means and the tilt of the zoom camera, the vertical shooting range of the device is wider than the height of the device, Iris is stable and convenient without being restricted by height or shooting distance within a certain range There is an effect that it is possible to obtain the award.

1 is a front structure diagram of a hybrid type iris zoom camera photographing apparatus according to the present invention.

Figure 2 is a side perspective view of the hybrid iris zoom camera photographing apparatus according to the present invention.

Figure 3 is a side perspective view illustrating a tilt operation of the hybrid iris zoom camera photographing apparatus according to the present invention.

4 is a conceptual diagram illustrating a tilt operation of the hybrid iris zoom camera photographing apparatus according to the present invention.

5 is a flowchart illustrating a hybrid type iris zoom camera photographing method according to the present invention;

* Description of Signs of Main Parts of Drawings *

1: control unit

2: main frame

10: Linear motor stator

11: magnetic

12: Linear motor mover

20, 21: encoder header, linear scale

30: Cable Bear

40: vertical guide shaft

50: carrier

55: tilt support frame

60: tilt motor

61,62: Gear

70: zoom camera

71: camera lens

72: solid state imaging device

110: iris incidence

101: subject

L: Vertical Shooting Range

L1: carrier vertical movement range

L2: Upper and Lower Tilt Range

Claims (4)

An iris zoom camera photographing apparatus for obtaining an iris image, A main body frame 2 having an open rectangular front portion; A pair of vertical guide shafts 40 having end portions fixedly mounted to upper and lower portions of the main body frame 2 at a predetermined distance from each other; A zoom camera 70 for capturing a subject's face image and an iris image is attached to the support frame 55 so as to tilt up and down, and the gears 61 and 62 and the tilt to rotate the zoom camera up and down. A carrier (50) attached to the tilting unit formed of a motor (60), having a hollow bush at its side, and inserted into the vertical guide shaft (40) to enable vertical transfer; A linear motor mover 12 fixed to move the carrier 50 vertically, and a linear motor mounted vertically on the upper rear surface of the main body frame 2 and linearly moving the linear motor mover 12 by a controller 1. A motor stator 10, 11, a linear scale 21 provided on the rear surface of the main body frame 2 on the side of the linear motor stator 10, 11, and a linear motor mover 12 side, which is provided on the linear scale. (21) vertical movement means composed of a linear encoder header 20 for transmitting the position information to the control unit; Analyzing the face image of the front side incident from the zoom camera to detect the eye height and the current photographing distance of the subject, the linear scale 20 so that the incident axis height of the zoom camera coincides with the detected eye height position of the subject The linear motor mover 12 is vertically controlled with reference to the positional information of 21, and when the detected eye level is outside the vertical movement range of the linear motor mover 12, the incident axis of the zoom camera is A controller (1) for driving the zoom camera tilt unit to be suitable for the entrance of the eye level, and to detect and acquire the iris image by adjusting the zoom lens and the focus lens of the zoom camera with reference to the detected current photographing distance. Hybrid type iris zoom camera shooting device, characterized in that consisting of. The method of claim 1, The vertical movement means, And a timing belt which is supported by upper and lower parts of the main body frame, the timing belt screwing the carrier to one side, and a rotation type motor fixedly mounted to the upper rear surface of the main body frame to drive the gear pulley. Hybrid iris zoom camera shooting device. The method of claim 1, The vertical movement means, And a ball screw rod which is supported on the upper and lower parts of the main body frame and moves the carrier vertically and vertically by the rotation of the screw method, and a rotating motor fixed to the lower part of the main body frame and axially coupled to the ball screw rod. Hybrid type iris zoom camera photographing device, characterized in that. Analyzing eye level of the subject in the face image (B); Calculating (C) whether the analyzed eye level is within a vertically movable range of a zoom camera; When the eye height of the analyzed subject is within the vertically movable range of the zoom camera, the zoom camera is moved vertically by vertical moving means so that the eye height of the analyzed subject corresponds to the incident axis thereof, and the analyzed subject If the eye height of the camera is outside the vertically movable range of the zoom camera, the zoom camera is vertically moved by the vertical moving means so that the analyzed eye height and the incident axis thereof are as close as possible, and then the incident axis of the zoom camera is Driving the zoom camera tilt part to drive the zoom camera up and down so that the detected image of the eye level of the photographed subject is incident (D, E, F); Analyze a face image of the front side incident from the zoom camera to detect the current photographing distance of the subject, and adjust the zoom lens and the focus lens of the zoom camera with reference to the detected current photographing distance to determine the iris image. Hybrid type iris zoom camera shooting method comprising the step of performing the detection and acquisition (H).