JP2004336396A - Atm monitoring camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ATM monitoring camera capable of clearly photographing an operator and the operation situation of an ATM in a plurality of fields of view under condition suitable for photographing on each field of view with an extremely simple and low cost hardware configuration. <P>SOLUTION: An objective lens 1 for photographing a face and an objective lens 2 for photographing a section around hands are provided at a camera 6 of a plurality of fields of view installed with an ATM terminal, in order to photograph an operator's face and hands.A video image formed by these object optical systems is composited by the compositing prism 5 of a plurality of fields of view, and the composited video image is formed again at a CCD 7 by a relay lens 8 for compositing field of view. Since an image of image-formation is relayed for the objective lens 1 for photographing a face and the objective lens 2 for photographing a section around hands, the objective lens 1 for photographing a face and the objective lens 2 for photographing a section around hands can be constituted as an independent optical system having different optical characteristics, and photographing condition can also be adjusted independently. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an ATM surveillance camera that is installed together with an ATM and captures images around the ATM.
[0002]
[Prior art]
In recent years, automatic teller machines (hereinafter referred to as ATMs) have been installed at various installation locations such as banks, convenience stores, and stations. Since an ATM is operated in an unmanned or near environment, it is common to install a surveillance camera to monitor the ATM or its surroundings as a security measure.
[0003]
It is desired that this type of surveillance camera records the ATM and its surroundings as a plurality of images from different angles of view. For example, Patent Literature 1 below discloses a configuration in which a plurality of surveillance cameras are used to capture an image around an ATM and simultaneously display the image on the screen of the ATM itself together with the state of an ATM transaction screen or the like.
[0004]
[Patent Document 1]
JP-A-2002-063632
[Problems to be solved by the invention]
In many ATM installation environments, a surveillance camera is often arranged so as to capture an image substantially in front of an operator from above or obliquely above an ATM operation unit. However, the conventional surveillance camera arranged in this way usually does not have a view to the hand for operating the ATM or the cash outlet.
[0006]
For this reason, the conventional surveillance camera cannot reliably record what operation (or action) the ATM user has performed.
[0007]
For example, some ATM users inadvertently leave the venue while forgetting cash or personal belongings, but conventional surveillance cameras may not possess such cash or personal belongings in the event of such loss. Cannot be proved. Even in such a loss case, if the surveillance camera image shows not only the user's face or upper body but also the operation hand and cash outlet, it is easy to identify who lost it. However, for that purpose, it is necessary to take measures such as installing two surveillance cameras or attaching a wide-angle lens to one surveillance camera.
[0008]
However, increasing the number of cameras to capture the operator and the operation status increases the cost of the entire system. (In many ATM installation environments, a camera for monitoring the area around the entrance and the entire corner is required. In addition, there is a problem that in a video obtained through a wide-angle lens, the subject appears small, and further, the periphery is greatly distorted, so that it is difficult to obtain necessary information from the image.
[0009]
Also, even if a moderate wide-angle lens is used, when monitoring with a single surveillance camera, if you try to match the angle of view to your face, you will not be able to reach the field of view, and conversely, adjust the angle of view to your hand. In this case, the disadvantage that the face becomes small and it becomes difficult to recognize it is inevitable. Further, since the focus position is different between the hand and the face, only one half of the information can be obtained with one camera.
[0010]
An object of the present invention is to solve the above-mentioned problems and to enable an ATM operator and an operation state to be photographed in a plurality of visual fields with a very simple and inexpensive hardware configuration under conditions suitable for photographing each visual field. It is in.
[0011]
[Means for Solving the Problems]
According to the present invention, in order to solve the above-described problems, according to the present invention, in an ATM surveillance camera that is installed together with an ATM and captures an image around the ATM, a first objective that captures a first visual field around the ATM under a first capturing condition. An optical system, a second objective optical system for photographing a second visual field around the ATM under a second photographing condition, and a multi-field synthetic prism for composing images formed by the first and second objective optical systems. Further, a configuration is employed in which a relay optical system for re-forming an image synthesized by the multi-field-of-view synthesizing prism on the imaging means is provided.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0013]
FIG. 1 shows a multi-view camera employing the present invention installed together with an ATM.
[0014]
As shown in FIG. 1, the multi-view camera 6 is arranged above the ATM terminal 103 so as to face the operator 104 substantially. The multi-view camera 6 has an imaging optical system having a plurality of optical axes having different directions indicated by reference numerals 101 and 102. The imaging fields of view of these imaging optical systems are 106 and 105, but as described later, this imaging field does not always match the actual imaging field of view.
[0015]
1 is configured as shown in FIG. The multi-view camera 6 uses a CCD 7 as an image pickup means, and re-images an image formed on the image pickup surface by the face photographing objective lens 1 and the hand photographing objective lens 2 by the multi-view synthesizing prism 5 and the relay lens 8. It is intended to be.
[0016]
In the configuration of the present embodiment, the objective lens 1 for photographing the face and the objective lens 2 for photographing the hand can be configured as independent and different objective optical systems. That is, they may have different focal lengths (angles of view), and if they are configured with a distance ring (not shown), a field stop, and a zoom system, the shooting conditions such as the angle of view are It may be one that can be adjusted separately.
[0017]
That is, at the position where the light incident on the face photographing objective lens 1 is imaged, the face photographing field stop 3 having an asymmetrical opening with respect to the optical axis, and the light incident on the hand photographing objective lens 2. Is provided with a hand-held field stop 4 having an asymmetrical opening with respect to the optical axis arranged at the position where is formed.
[0018]
A plurality of view synthesis prisms 5 are arranged behind the face shooting field stop 3 and the hand shooting field stop 4 to synthesize the images transmitted through the face shooting field stop 3 and the hand shooting field stop 4 into one image. It is arranged so that the image synthesized by the multiple view synthesis prism 5 is re-imaged on the imaging surface of the CCD 7 by the view synthesis relay lens 8.
[0019]
In an actual optical system, the exit pupils of the objective lenses 1 and 2 and the entrance pupil of the field-of-view synthesizing relay lens 8 have a conjugate relationship near the field stops 3 and 4 as necessary. A field lens is arranged (not shown).
[0020]
In FIG. 2, the block shown as the multi-view camera 6 can use an existing CCD camera.
[0021]
In this type of CCD camera, the output image is a horizontally long rectangle with an aspect ratio of 4: 3. In the present invention, the image is divided into two parts at the center of the long side, and the operator's face and hand are each separated. In order to display an image from the field of view, the part of the multi-field camera 6 is disposed in a state rotated by 90 ° about the optical axis with respect to the normal direction as shown in the figure. As a result, the left and right sides of the original CCD camera come to the positions indicated by reference numerals 6r and 6l as shown.
[0022]
The multi-view camera 6 is a control unit 61 including a CPU and a memory for controlling the photographed image processing of the CCD 7, or a recording medium constituted by a hardware such as a video recorder and a hard disk for recording photographed image data. 62, an input / output unit 63 for outputting captured image data to a monitor of a monitoring center (not shown), an external video recorder, or the like is provided. Both of the recording medium 62 and the input / output unit 63 are not essential, and one of them may be omitted.
[0023]
Further, the control section 61 can be provided with an image processing section for performing image processing on the output image of the CCD 7 as necessary. For example, in the configuration of the present embodiment, the image at hand of the operator is a vertically inverted image as described later, but the image processing unit of the control unit 61 converts such an inverted image into an erect (non-inverted) image. , Or a color correction process, a sharpening process, or the like. By performing such image processing, the reliability and easiness of ATM operator monitoring can be improved.
[0024]
The multi-view synthesis prism 5 may have a transmission / reflection interface having an angle such that light in the optical axis direction of the face imaging system and the hand imaging system can be transmitted and reflected as shown in the figure.
[0025]
Then, in order to divide the imaging surface of the CCD 7 into two and simultaneously photograph images of the face photographing system and the hand photographing system, the face photographing field stop 3 and the hand photographing field stop 4 are configured as follows.
[0026]
That is, as shown in FIG. 6, the face field stop 3 for photographing the face and the field stop 4 for photographing the hand are provided with openings for masking half of the entire visual field and transmitting the other half. It is preferable that the face stop 3 for photographing the face and the field stop 4 for photographing at hand be changed in direction according to the purpose so as to be mounted.
[0027]
With the configuration of the optical system as described above, in the configuration of FIG. 2, the operator's face (21) formed by the face photographing objective lens 1 whose focal length has been adjusted so that the periphery of the face falls within the angle of view (21). The image (21a) is masked by the face photographing field stop 3, and only half of the image in which the face is reflected is transmitted and re-imaged on the CCD 7 (21b). At this time, the light transmitted through the face photographing field stop 3 is re-imaged by the field-of-view synthesizing relay lens 8, and eventually the video output from the multi-field camera 6 corresponding to the image 21b is as indicated by the reference numeral 31 in FIG. Become. The dark-colored part 32 in FIG. 3 corresponds to the mask area of the field photographing field stop 3, and nothing is shown here.
[0028]
On the other hand, an image (22a) of the operator's hand (22) formed by the hand-photographing objective lens 2 whose focal length has been adjusted so that the vicinity of the hand is within the angle of view is formed by the field-of-view diaphragm 4 for hand-photographing. Since the aperture allows the transmission of only half of the image, the half of the image (22a) is reflected by the reflecting surface of the multiple-view synthesizing prism 5, and further the relay lens 8 for synthesizing the visual field. Is re-imaged (22b). Therefore, the video output from the multi-view camera 6 corresponding to the image 22b is as indicated by reference numeral 41 in FIG. The dark portion 42 in FIG. 4 corresponds to the mask area of the hand-held field stop 4, and nothing is shown here. Further, since the image at hand is reflected by the multiple-view combining prism 5, the image is a vertically inverted image (the process of converting the image into an erect (non-inverted) image by the image processing unit of the control unit 61 described above). You can also display it after doing it.)
[0029]
Since the CCD 7 captures the images shown in FIGS. 3 and 4, the image captured by the multi-view camera 6 shown in FIG. 2 has an image of the operator's face portion in the left half as shown in FIG. The image of the part at hand of the operator is synthesized in half.
[0030]
As described above, the image of the face of the person operating the ATM and the image at hand can be captured on one screen. According to the present embodiment, it is not necessary to arrange a plurality of cameras or to combine these images, and it is possible to shoot a plurality of fields with only the cameras, which increases the hardware cost required for the monitoring system. Can be reduced. According to the ATM surveillance camera of the present embodiment, since images of a plurality of fields of view can be output, there is no need for a means for combining and outputting the images of the plurality of cameras, and the existing CCD camera hardware is almost diverted. It is very simple and inexpensive.
[0031]
Further, the objective optical system for photographing the face and the hand (the objective lens 1 for photographing the face and the objective lens 2 for photographing the hand) does not need to be a wide-angle lens capable of photographing both the face and the hand as in the related art. A focal length suitable for monitoring can be selected.
[0032]
Further, in the above configuration, the objective optical system for photographing the face and the hand is independent of each other, and an image formed by each is relayed to the CCD. Therefore, if necessary, the optical characteristics such as the focal length (angle of view) and the imaging magnification of the objective optical system for photographing the face and the hand (the objective lens 1 for photographing the face and the objective lens 2 for photographing the hand) are separately set. In addition, shooting conditions such as subject distance (focus adjustment) and field stop can be set separately.
[0033]
For example, in a shooting situation as shown in FIG. 1, the subject distance between the face of the operator 104 and the hand is different, but a distance ring (not shown) of the objective lens 1 for face shooting and the objective lens 2 for hand shooting, The field stop or, if these are zoom systems, their angles of view can be adjusted separately, and the face and hand of the operator 104 can be photographed clearly and in the required size. The analysis becomes extremely easy.
[0034]
Therefore, according to the ATM surveillance camera of the present embodiment, only one camera is required for photographing the ATM user in a plurality of fields of view, so that the photographing can be performed at low cost, and the information on the ATM user can be described in detail and clearly. For example, even in the case of the above-mentioned loss, the owner of the cash or belongings of the ATM user can be easily proved.
[0035]
In the ATM surveillance camera according to the above embodiment, an example in which an image of the face and hand of the ATM operator is photographed has been described. However, the image photographed by the ATM surveillance camera may be an arbitrary plurality of fields around the ATM. It goes without saying that the present invention is not limited to the face and hand of the ATM operator.
[0036]
Also, the video captured by the ATM monitoring camera may be a moving image or a still image. The captured video may be recorded on the recording medium 62 or transmitted to the monitoring center via a network or the like in the form of a predetermined video signal (or arbitrary video image data such as MPEG or JPEG).
[0037]
【The invention's effect】
As is apparent from the above description, according to the present invention, in the ATM monitoring camera that is installed together with the ATM and captures an image around the ATM, the first field of view that captures the first field of view around the ATM under the first capturing condition. An objective optical system, a second objective optical system for photographing a second visual field around the ATM under a second photographing condition, and a multi-field synthetic prism for composing images formed by the first and second objective optical systems. And a relay optical system for re-imaging the image synthesized by the multi-field synthesis prism on the image pickup means. Can be photographed in a plurality of visual fields under conditions suitable for photographing in each visual field. For example, an image focused at an angle of view suitable for each of the plural photographing visual fields and individually focused can be captured by one A Can be taken by M surveillance cameras, excellent effect can be obtained.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a state in which a multi-view camera employing the present invention is installed together with an ATM.
FIG. 2 is an explanatory diagram showing a configuration of the multi-view camera of FIG. 1;
FIG. 3 is an explanatory diagram showing an image obtained from a face photographing visual field in the multi-view camera of FIG. 1;
FIG. 4 is an explanatory diagram showing an image obtained from a near shooting field of view in the multi-view camera of FIG. 1;
FIG. 5 is an explanatory diagram showing a composite image obtained by the multi-view camera of FIG. 1;
FIG. 6 is an explanatory diagram showing a shape of a field stop of the multi-field camera of FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Objective lens for photographing a face 2 Objective lens for photographing a hand 3 Field stop for photographing a face 4 Field stop for photographing a hand 5 Multiple view synthesizing prism 6 Multiple view camera 7 CCD
8 Field of view synthesis relay lens 61 Control unit 62 Recording medium 63 Input / output unit 103 ATM terminal 104 Operator

Claims (4)

In an ATM surveillance camera that is installed with an ATM and shoots images around the ATM,
A first objective optical system that captures a first visual field around the ATM under a first capturing condition;
A second objective optical system that captures a second visual field around the ATM under a second capturing condition;
A multiple-field combining prism for combining images formed by the first and second objective optical systems;
An ATM surveillance camera, comprising: a relay optical system for re-imaging an image synthesized by the multi-field synthesis prism on an imaging unit. 2. The ATM surveillance camera according to claim 1, wherein the first and second objective optical systems have different optical characteristics. The ATM surveillance camera according to claim 1, wherein the first and second photographing conditions are independently adjustable. 2. The ATM surveillance camera according to claim 1, wherein the first objective optical system captures an image of the face of the ATM operator, and the second objective optical system captures an image of the hand of the ATM operator.

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