JP2000134611A - Trespasser monitoring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To acquire information required for the personal specification of facial features or the like without being recognized by a trespasser by sensing the presence/absence of the trespasser from a thermal image provided by an infrared camera, radiating near infrared rays from an infrared radiator, catching the trespasser through a near infrared camera and recording the image. SOLUTION: When the trespasser 9 enters a monitor object zone, an infrared camera 1 outputs the thermal image containing an infrared image generated by the body temperature of the trespasser 9. Since the infrared image of the trespasser is moved with the passage of time, at a trespasser detecting means, the trespasser 9 is detected by calculating the background image of the previously acquired monitor object zone or the difference or correlation between frames and at the time point when the trespasser 9 is detected, a detecting signal is outputted. When the detecting signal is inputted, a near infrared radiator 5 irradiates near infrared camera view 11 with near infrared rays. At the same time, a near infrared camera 6 picks up the near infrared monitor image in the near infrared camera view 16 and records it through an image recording means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intruder monitoring apparatus for detecting a suspicious person entering a restricted area at night or in the dark.

[0002]

2. Description of the Related Art A conventional intruder monitoring apparatus of this type can monitor the presence or absence of an intruder and the number of intruders by monitoring only a thermal image. Cannot be identified because the characteristics of the person cannot be detected. In addition, with an intruder monitoring device that uses a visible camera and a lighting device in combination to capture the intruder's human phase, the intruder can see the area being monitored from the illumination range, so that the intruder can enter from an unilluminated location such as a shadow. Could not be dealt with.

[0003]

SUMMARY OF THE INVENTION Information for identifying an intruder cannot be obtained only from a thermal image. In addition, in an intruder monitoring device that uses a visible camera and a lighting device in combination to capture the intruder's human phase, the area monitored from the illumination range can be recognized by the intruder, so that the effect of suppressing the intruder's action was poor. .

[0004] The present invention has been made to solve such a problem, and proposes an intruder monitoring device which enables identification of an intruder without being recognized by an intruder in the monitored area. .

[0005]

The intruder monitoring apparatus according to the first invention detects the presence or absence of an intruder from a thermal image obtained by an infrared camera, irradiates near-infrared rays with a near-infrared irradiator, and detects the intruder. It is configured to capture the image with a near infrared camera and record the image.

The intruder monitoring apparatus according to the second invention irradiates near-infrared rays with a near-infrared ray irradiator in the direction of the intruder detected by the thermal image, and records an image of the intruder captured by a near-infrared camera. It is configured as follows.

The intruder monitoring apparatus according to the third invention irradiates near-infrared rays with a near-infrared ray irradiator in the direction of the intruder detected by a thermal image, and also has a narrow-field near-infrared camera directed in the direction of the intruder. It is configured to record the image of the intruder captured in.

The intruder monitoring apparatus according to the fourth invention is such that the visual axis of the infrared camera, the irradiation direction of the near-infrared irradiator and the visual axis of the near-infrared camera are aligned in the direction of the intruder, and the near-infrared irradiator is used. It is configured to illuminate and record an image of the intruder captured by a near-infrared camera.

Further, the intruder monitoring device according to the fifth invention aligns the irradiation direction of the near-infrared ray irradiator with the visual axis of the near-infrared camera in the direction of the intruder, and furthermore, at the separation distance of the intruder, the human-sized near-infrared. Each optical system is controlled so as to obtain an infrared irradiation area and a near-infrared camera field of view, and is configured to illuminate with a near-infrared irradiator and record an image of an intruder captured by a near-infrared camera.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a system diagram showing Embodiment 1 of the present invention, where 1 is an infrared camera,
2 is a thermal image, 3 is an intruder detecting means for detecting a high-temperature portion moving from the heat distribution of the thermal image 2 as an intruder and outputting a detection signal, 4 is a detection signal, 5 is a wavelength 0 in the field of view of the infrared camera 1. A near-infrared irradiator illuminating with near-infrared light of about 0.7 to 1.5 microns, a near-infrared camera 6 having a visual field equal to or greater than that of the infrared camera 1, a near-infrared monitoring image 7, and an image recording means 8 . FIG. 2 is a configuration diagram showing Embodiment 1 of the present invention, where 1 is an infrared camera,
5 is a near-infrared irradiator, 6 is a near-infrared camera, 9 is an intruder, 10 is a fixture for a monitoring device, 11 is an infrared camera view range, 15 is a near-infrared irradiation range, and 16 is an infrared camera view range.

Next, the operation will be described with reference to FIGS. The infrared camera field of view 11 includes the monitoring target area, and the infrared camera 1 and the near infrared irradiator 5 and the near infrared camera 6 have the infrared camera field of view 11, the near infrared irradiation area 15, and the near infrared camera field of view 16 respectively. 1 and the near-infrared camera 6 are arranged at the same focal length or in such a manner that the infrared camera field of view 11 is included in another area, and is integrally fixed to a ceiling, a wall, or the like by the monitor fixture 10. When the intruder 9 enters the monitoring target area, the infrared camera 1 outputs a thermal image 2 including an infrared image generated by the body temperature of the intruder 9. Since the infrared image of the intruder 9 moves with time in the intruder detecting means 3, the intruder 9 is detected by calculating a background image of the monitored area or a difference or correlation between frames acquired in advance, and the intruder 9 is detected. When the person 9 is detected, the detection signal 4 is output.
When the detection signal 4 is input, the near-infrared irradiator 5 irradiates near-infrared rays to the field of view 11 of the infrared camera. At the same time, the near-infrared camera 6 captures the near-infrared monitoring image 7 in the near-infrared camera field of view 16 and records it by the image recording means 8. Since the near-infrared monitoring image 7 has a wavelength close to visible light, the intruder 9
The information necessary to identify an individual, such as a human face, can be obtained in an image close to a visible image without being known to the public. Further, the intruder detecting means 3 determines the degree of approach of the intruder 9 from the size of the high-temperature portion of the thermal image 2, that is, the expected angle of the intruder 9, and detects the detection signal in a state where the intruder 9 approaches a short distance. By outputting 4, a near-infrared monitoring image 7 including a larger image of the intruder 9 is obtained, which is useful for identifying a person. In addition, another position sensor can be used in combination to determine the distance to the intruder 9.

Embodiment 2 FIG. FIG. 3 is a system diagram showing Embodiment 2 of the present invention, wherein 1 is an infrared camera, 2 is a thermal image, and 3 is a high-temperature portion moving from the heat distribution of the thermal image 2 detected as an intruder, and heat of the intruder is detected. Intruder detection means for outputting a detection position signal including position information on the image 2; 14 is a detection position signal; 5 is a near-infrared irradiator having an irradiation angle narrower than the field of view of the infrared camera 1; Reference numeral 5 denotes an irradiation direction control means for controlling the irradiation direction within the field of view of the infrared camera 1, reference numeral 6 denotes a near-infrared camera having a visual field equal to or greater than that of the infrared camera 1, reference numeral 7 denotes a near-infrared monitoring image, and reference numeral 8 denotes image recording means. FIG. 4 is a configuration diagram showing Embodiment 2 of the present invention, wherein 1 is an infrared camera, 5 is a near-infrared irradiator,
Reference numeral 6 denotes a near-infrared camera, 12 denotes an irradiation direction control means, 20 denotes a visual axis of the infrared camera, 21 denotes a near-infrared irradiation direction, and 22 denotes a visual axis of the near-infrared camera. FIG. 5 shows an example of an intruder monitoring situation according to the second embodiment of the present invention.
Reference numeral 9 denotes an intruder infrared image, 11 denotes an infrared camera view range, and 15 denotes a near-infrared irradiation range.

Next, the operation will be described with reference to FIGS. 3, 4 and 5. FIG. The infrared camera field of view 11 includes the monitoring target area, and the infrared camera 1 and the near infrared camera 6 have the same field of view at the focusing distance of the infrared camera 1 and the near infrared camera 6, or the infrared camera field of view matches the field of view of the near infrared camera. The infrared camera viewing axis 20 and the near infrared camera viewing axis 22 are arranged in parallel to be included. The near-infrared irradiator 5 is connected to the irradiation direction control means 12. When the intruder 9 enters the monitoring target area, the infrared camera 1 outputs a thermal image 2 including an infrared image generated by the body temperature of the intruder 9. The intruder detection means 3 detects the intruder 9 because the intruder infrared image 19 moves with time, and when the intruder 9 is detected, the position of the intruder infrared image 19 within the infrared camera view range 11 is determined. The detected detection position signal 14 is output. The irradiation direction control means 12 adjusts the direction of the near-infrared irradiator 5 based on the detection position signal 14 so that the irradiation direction of the near-infrared irradiator 5 coincides with the detected position direction. Since the near-infrared irradiator 5 having the limited irradiation angle has the highest illuminance in the irradiation direction, it can illuminate the intruder 9 with the highest luminance. In this state, the near-infrared irradiator 5 emits near-infrared light, and at the same time, the near-infrared camera 6 captures a near-infrared monitoring image 7 in the near-infrared camera field of view 16 and records it by the image recording means 8. Since the near-infrared monitoring image 7 uses a wavelength close to visible light, information necessary for identification of an individual such as a human phase can be acquired as an image close to a visible image without being known to the intruder 9. Furthermore, the near-infrared irradiation range 15
Is near-infrared surveillance image 7 because it is illuminated around intruder 9
Extraction and identification of the location of the intruder become easy regardless of the position of the intruder 9 above. The near-infrared irradiator 5 becomes a light source having higher directivity by using a laser diode as a light source, and can cope with an intruder 9 at a long distance. Note that a plurality of intruders can be dealt with by irradiating the near-infrared irradiation direction by the irradiation direction control means 12 sequentially.

Embodiment 3 FIG. 6 is a system diagram showing a third embodiment of the present invention, wherein 1 is an infrared camera, 2 is a thermal image, and 3 is a high-temperature portion moving from the heat distribution of the thermal image 2 detected as an intruder, and heat of the intruder is detected. Intruder detection means for outputting a detection position signal including position information on the image 2, 14 is a detection position signal, 5 is a near-infrared irradiator having an irradiation angle narrower than the field of view of the infrared camera 1, and 6 is a visual axis direction. A near-infrared camera that matches the irradiation direction of the near-infrared irradiator 5 and has a field of view equivalent to the irradiation angle, 13 is a near-infrared imaging direction control unit that controls the visual axis direction of the near-infrared camera 6, and 7 is a near-infrared monitoring image , 8 are image recording means. FIG. 7 shows an example of an intruder monitoring situation according to the third embodiment of the present invention. In the figure, 19 indicates an intruder infrared image, 11 indicates an infrared camera view range, and 15 indicates a near infrared irradiation range. , 16 indicate a near-infrared camera visual field range.

Next, the operation will be described with reference to FIGS. The near-infrared camera 6 and the near-infrared irradiator 5 are arranged such that the near-infrared camera viewing axis direction and the near-infrared irradiation direction are parallel to each other, and are coupled to the near-infrared imaging direction control means 13 so as to be controlled in direction. If there is an intruder in the monitored area, the infrared camera 1 outputs a thermal image 2 including an infrared image emitted by the intruder's body temperature. The intruder detecting means 3 detects the intruder 9 because the intruder infrared image 19 moves with time, and obtains the position of the intruder infrared image 19 within the infrared camera view range 11 at the time of detecting the intruder. The detection position signal 14 is output. Near-infrared imaging direction control means 1
3 controls the detection position signal 14 so that the visual axis direction of the near-infrared camera is directed to the detection position direction. In this state, the near-infrared irradiator 5 emits near-infrared light, and at the same time, the near-infrared camera 6 outputs a near-infrared monitoring image 7 in the near-infrared camera field of view 16 and records it by the image recording means 8. Since the near-infrared monitoring image 7 uses a wavelength close to visible light, information necessary for identifying an individual such as a human phase can be acquired as an image close to a visible image without being known by an intruder. Also, a plurality of intruders are dealt with by changing the visual axis direction of the near-infrared camera by the near-infrared imaging direction control means 13 and sequentially irradiating them. Since the intruder is illuminated in the form of a spot, it is easy to separate the image of the intruder from the background, and a near-infrared surveillance image 7 including a larger image of the intruder is obtained.

Embodiment 4 FIG. 8 is a system diagram showing Embodiment 4 of the present invention, wherein 1 is an infrared camera, 2 is a thermal image, and 3 is a high-temperature portion moving from the heat distribution of the thermal image 2 detected as an intruder, and the heat of the intruder is detected. Intruder detection means for outputting a detection position signal including position information on the image 2, 14 is a detection position signal, 5 is a near-infrared irradiator whose illumination direction is matched with the visual axis direction of the infrared camera 1, and 6 is an infrared ray A near-infrared camera 17 in which the visual axis direction of the camera 1 is aligned with the visual axis, 17 denotes the infrared camera 1, the near-infrared irradiator 5, and the near-infrared camera 6 integrated with each other. Imaging direction control means for controlling, 7 is a near infrared monitoring image,
Reference numeral 8 denotes an image recording unit. FIG. 7 is a block diagram showing a fourth embodiment of the present invention, wherein 1 is an infrared camera, 5 is a near-infrared irradiator, 6 is a near-infrared camera, 9 is an intruder, 1
7 is an imaging direction control means, 20 is a visual axis of an infrared camera, 21
Denotes a near-infrared irradiation direction, and 22 denotes a visual axis of a near-infrared camera.

Next, the operation will be described with reference to FIGS. The infrared camera 1, the near-infrared irradiator 5 and the near-infrared camera 6 are arranged so that the respective infrared camera viewing axis 20, near-infrared irradiation direction 21, and near-infrared camera viewing axis 22 are parallel to each other. It is fixed to a ceiling, a wall, or the like via 17. When the intruder 9 enters the field of view of the infrared camera 1, the infrared camera 1 outputs a thermal image 2 including an infrared image generated by the body temperature of the intruder 9. The intruder detecting means 3 detects the intruder 9 because the intruder infrared image 19 moves with time, and obtains the position of the intruder infrared image 19 within the range of the infrared camera visual field when the intruder 9 is detected. The detection position signal 14 is output. The imaging direction control means 17 controls the infrared camera viewing axis 20, near infrared irradiation direction 21, and near infrared camera viewing axis 22 in the detection position direction in accordance with the detection position signal 14. Near infrared irradiator 5
Irradiates near-infrared light, and at the same time, the near-infrared camera 6 outputs a near-infrared monitoring image 7 in the near-infrared camera field of view 16 and records it by the image recording means 8. Since the near-infrared monitoring image 7 uses a wavelength close to visible light, information necessary for identification of an individual such as a human phase can be acquired as an image close to a visible image without being known to the intruder 9. The intruder detecting means 3 determines the degree of approach of the intruder 9 from the size of the high-temperature portion of the thermal image 2, that is, the expected angle of the intruder 9, and determines whether the intruder 9 is close to the near infrared. By recording the surveillance image 7, a larger near-infrared surveillance image 7 of the intruder 9 is obtained, which is useful for identifying a person. Further, since the visual axis of the entire apparatus is controlled, it is possible to monitor a wider area without an intruder deviating from the visual field.

Embodiment 5 FIG. 10 is a system diagram showing Embodiment 5 of the present invention, wherein 1 is an infrared camera, 2 is a thermal image, and 3 is a high-temperature portion moving from the heat distribution of the thermal image 2 as an intruder, and the heat of the intruder is detected. Intruder detecting means for outputting a detected position signal including position information on the image 2, 14 is a detected position signal, 23 is a distance measuring means for obtaining a distance to the intruder, 26 is a separation distance, 6 is a near-infrared camera, 25 Is a near-infrared camera control means for controlling the field of view according to the separation distance 26, 5 is a near-infrared irradiator whose irradiation direction is matched with the irradiation direction of the near-infrared camera 6, and 24 is an irradiation angle of the near-infrared irradiator 5. An irradiation angle control means for controlling the near-infrared camera 6 in accordance with the separation distance 26 so as to be equivalent to a visual field range, a near-infrared imaging direction control means 13 for controlling a visual axis direction of the near-infrared camera 6, and a near-infrared monitoring Image 8 It is a means.

Next, the operation will be described with reference to FIG. The near-infrared camera 6 and the near-infrared irradiator 5 are arranged so that the near-infrared camera viewing axis direction and the near-infrared irradiation direction are parallel to each other, and are coupled to the near-infrared imaging direction control means 13 so as to be controlled in direction. . Infrared camera 1 is an intruder 9
A thermal image 2 including an infrared image generated by the body temperature is output. The intruder detecting means 3 detects the intruder since the intruder infrared image moves with time, and at the time of detecting the intruder, finds the position of the intruder infrared image 19 in the infrared camera visual field range 11 and detects the detected position. The signal 14 is output. The near-infrared imaging direction control means 13 controls the near-infrared camera visual axis in the detection position direction in accordance with the detection position signal 14. From the separation distance 26 obtained by the distance measurement means 23,
The near-infrared camera control means 25 controls the focal length of the lens of the near-infrared camera 6 so that the field of view at the separation distance becomes the size of a human. Similarly, the magnification of the optical system of the near-infrared irradiator 5 is controlled from the separation distance 26 by the irradiation angle control means 24 so that the near-infrared irradiation range at the separation distance has the size of a human. In this state, near-infrared rays are emitted from the near-infrared ray irradiator 5, and at the same time, the near-infrared monitoring image 7 in the near-infrared camera field of view 16 is output from the near-infrared camera 6 and recorded by the image recording means 8. Since the near-infrared monitoring image 7 uses a wavelength close to visible light, information necessary for identifying an individual such as a human phase can be acquired as an image close to a visible image without being known by an intruder. In addition, a plurality of intruders are dealt with by sequentially scanning the near-infrared camera visual axis direction by the near-infrared imaging direction control means 13. Furthermore, since a monitoring image of a constant quality can be obtained regardless of the distance to the intruder, monitoring can be performed for a wide area. The distance measuring means 23 is realized by a light wave distance measuring device whose axis is aligned with the visual axis direction of the near-infrared camera, or a relative position measurement by a plurality of infrared cameras 1 installed at a certain distance.

[0020]

According to the first aspect of the invention, the presence or absence of an intruder is detected from a thermal image obtained by an infrared camera, near-infrared rays are emitted by a near-infrared irradiator, and the intruder is captured by a near-infrared camera. Since the system is configured to record an image, there is an effect that information necessary for identifying an individual such as a human phase can be obtained without being recognized by an intruder.

According to the second invention, near-infrared rays are emitted from the near-infrared irradiator having high directivity in the direction of the intruder detected by the thermal image, and an image of the intruder captured by the near-infrared camera is recorded. Because it is structured, it is not recognized by intruders,
In addition, it is possible to obtain information necessary for identifying an individual such as a human phase regardless of the position of the intruder, and it is also possible to easily extract the intruder and specify the location of the intruder on the acquired image.

According to the third aspect of the invention, the near-infrared ray irradiator irradiates near-infrared rays in the direction of the intruder detected by the thermal image, and the narrow-field near-infrared camera directed in the same direction as the intruder captures the intruder. Is configured to record the image of the intruder, so that the image of the intruder can be acquired without being noticed by the intruder, the separation from the background becomes easy, and the person can be easily identified from the acquired image including the larger image of the intruder. Has the effect of becoming

According to the fourth aspect, the irradiation direction of the near-infrared ray irradiator is aligned with the visual axis of the near-infrared camera in the direction of the intruder. It controls each optical system so that a near-infrared camera field of view can be obtained, illuminates with a near-infrared irradiator, and records the image of the intruder captured by the near-infrared camera, so it is not recognized by the intruder In addition, an image including a larger image of the intruder can be acquired, the person can be easily specified, and the intruder can be monitored over a wide area without being out of the field of view.

According to the fifth invention, the irradiation direction of the near-infrared ray irradiator and the visual axis of the near-infrared camera are aligned in the direction of the intruder. And control each optical system to obtain a near-infrared camera field of view, illuminate with a near-infrared irradiator, and record the image of the intruder captured by the near-infrared camera, so that it is not recognized by the intruder In addition, an effective image for identifying a person can be obtained, and a monitoring image of a fixed size can be obtained regardless of the distance to the intruder. Therefore, there is an effect that monitoring and identification of an intruder can be performed in a wide area.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a first embodiment.

FIG. 2 is a configuration diagram showing the first embodiment.

FIG. 3 is a system diagram showing a second embodiment.

FIG. 4 is a configuration diagram showing a second embodiment.

FIG. 5 is a diagram illustrating an example of an intruder monitoring situation according to the second embodiment;

FIG. 6 is a system diagram showing a third embodiment.

FIG. 7 is a diagram illustrating an example of an intruder monitoring situation according to the third embodiment;

FIG. 8 is a system diagram showing a fourth embodiment.

FIG. 9 is a configuration diagram showing a fourth embodiment.

FIG. 10 is a system diagram showing a fifth embodiment.

[Explanation of symbols]

1 infrared camera, 2 thermal images, 3 intruder detection means,
4 detection signal, 5 near-infrared irradiator, 6 near-infrared camera, 7 near-infrared monitoring image, 8 image recording means, 9 intruder, 10 monitoring device fixture, 11 infrared camera field of view, 12 irradiation direction control means, 13 near Infrared imaging direction control means, 14 detection position signal, 15 near infrared irradiation range, 16 near infrared camera field of view, 17 imaging direction control means, 19 intruder infrared image, 20 infrared camera visual axis, 21 near infrared irradiation direction, 22 near Infrared camera visual axis, 23 distance measuring means, 24 irradiation angle control means, 25
Near infrared camera control means, 26 Separation distance.

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 5C054 AA01 AA05 CA05 CA10 CC05 CF03 CF06 CG03 CG06 CG07 CH01 CH06 EA01 EA05 EA07 FC12 FC13 GA01 GB02 GD05 GD06 HA18 5C084 AA02 AA07 BB31 CC19 DD14 DD65 DD71 GG39GG51

Claims (5)

[Claims] An infrared camera for outputting a thermal image of a monitoring target area to the outside, an intruder detecting means for detecting an intruder from the thermal image, and a detection signal of the intruder detecting means, the infrared signal being provided in a field of view of the infrared camera. An intruder comprising: a near-infrared irradiating unit that irradiates near-infrared light; a near-infrared camera that outputs a near-infrared monitoring image in the monitoring target area; and an image recording unit that records the near-infrared monitoring image. Monitoring device. 2. An intruder detecting means for detecting a direction of an intruder from the thermal image, and an irradiation direction control means for matching an irradiation direction of the near-infrared irradiator to the intruder direction detected by the intruder detecting means. 2. The device according to claim 1, wherein
Intruder monitoring device as described. 3. An infrared camera for outputting a thermal image of a monitoring target area to the outside, an intruder detecting means for detecting a direction of an intruder from the thermal image, and irradiating near infrared rays by a detection signal of the intruder detecting means. A near-infrared irradiator, a near-infrared camera having a narrower field of view than the infrared camera and outputting a near-infrared monitoring image, and an irradiation direction of the near-infrared irradiator in a direction of the intruder detected by the intruder detecting means. An intruder monitoring apparatus comprising: a near-infrared imaging direction control unit that matches a visual axis direction of the near-infrared camera; and an image recording unit that records the near-infrared monitoring image. 4. An infrared camera for outputting a thermal image of a monitoring target area to the outside, an intruder detecting means for detecting a direction of an intruder from the thermal image, and irradiating near-infrared rays by a detection signal of the intruder detecting means. A near-infrared irradiator, a near-infrared camera that has a narrower field of view than the infrared camera and outputs a near-infrared monitoring image, and a visual axis direction of the infrared camera in a direction of the intruder detected by the intruder detecting means. An intruder monitoring device comprising: an imaging direction control unit that matches an irradiation direction of the near-infrared irradiator and a visual axis direction of the near-infrared camera; and an image recording unit that records the near-infrared monitoring image. . 5. A distance measuring means for measuring a separation distance of an intruder, and an irradiation angle control means for adjusting an irradiation angle of the near-infrared irradiator so that a coverage area of the near-infrared light at the separation distance becomes human-sized. 4. The intruder monitoring apparatus according to claim 3, further comprising: a near-infrared camera control unit that adjusts a viewing angle so that a field of view of the near-infrared camera at the separation distance becomes human-sized.