JPH09116892A - Video monitor equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain high speed fault detection processing and to simply transfer fault information. SOLUTION: A video signal from a television camera 1 is converted into a digital signal by an A/D converter section 2 and an image signal in the normal state is stored in a background image storage section 3 and that stored in the reference image storage section 4, in a small area being a division of a monitor area stored in advance in an area storage section 6 and discriminates a fault in the area, the image information in the small area is sent from a transmission reception section 7 to a transmission reception section 8 of a monitor section via a telephone line L1 and stored in a fault image storage section 10. An image decoding section 11 reads an image signal of a fault part from the fault image storage section 10 from the image signal at normal state from the background image storage section 9 stored in advance and imbeds it to a prescribed location of a fault image, decodes the fault image and uses a D/A converter section 12 to convert the image into an analog signal and it is displayed on a video monitor 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fast-response video surveillance device for performing security surveillance from a remote location using an image pickup device.

[0002]

2. Description of the Related Art In a conventional video monitoring apparatus, the video signal of the entire monitoring area is signal-processed, and if an abnormality is detected, the abnormality information is transferred to a monitor section to restore the abnormal image and detect the abnormality. I was watching. However, this method has a problem that it is always necessary to detect an abnormality in the entire monitoring area, and it takes time to detect the abnormality. There is also a problem that the band compression / expansion process at the time of transmission becomes complicated.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a technique capable of speeding up anomaly detection processing and easily transferring anomaly information.

[0004]

A background image storage section for storing reference image information, a reference image storage section for storing a monitoring image, an area storage section for storing a monitoring area, and the background image. An abnormality detection unit for detecting an abnormality from an image is provided, the monitoring area provided in the image area is further divided into a plurality of small areas, and the background image signal and the reference image signal are compared for each small area to detect an abnormality. The image information is transmitted to a monitor at a remote place through a telephone line or the like and is monitored as an abnormal portion.

An intruding object detection area smaller than the monitoring area is further provided in the monitoring area provided in the image area, and the background image and the reference image are compared in the intruding object detection area to determine an abnormality and detect the abnormality. In this case, the abnormal portion in the entire monitoring area is detected, and the abnormal information is transmitted to a monitor at a remote place through a telephone line or the like for monitoring.

The intruding object detection area is a plurality of small areas out of the small areas provided in the monitoring area, and an abnormality is determined in each of the small areas to determine an abnormality in the intruding object detection area.

In the determination of abnormality in the small area, the correlation between the background image signal and the reference image signal for each small area is obtained, and when the correlation value is less than or equal to a predetermined integrated value, it is determined to be abnormal.

To determine the abnormality, the difference between the signal levels of the background image signal and the reference image signal for each small area is calculated, and when the signal level difference is equal to or greater than a predetermined integral value, it is determined to be abnormal.

The abnormality is judged to be abnormal when the number of small areas determined to be abnormal in the intruding object detection area is a predetermined number or more.

The abnormality information transferred to a remote place through a telephone line or the like is image information of a small area determined to be abnormal and a number indicating the position on the screen of the small area numbered in advance to the small area.

In the image restoration display on the monitor, a background image in a normal state is captured in advance, and the small area image information transferred to the background image is fitted and displayed in the position indicated by the number.

The abnormality information transferred to a remote place through a telephone line or the like is only a number representing the position on the screen which is numbered in advance to the small area determined to be abnormal.

In the image restoration display on the monitor, the background image in the normal state is captured in advance, and the position indicated by the number of the small area transferred to the background image is displayed by blinking the same color such as red. .

By providing a screen position input means, the small area division information or the intruding object detection area input by the means is displayed on a monitor and transferred by a telephone line or the like to be stored in the area storage section to store the small area. Or set the intrusion area.

[0015]

A background image storage unit that stores standard image information, a reference image storage unit that stores a monitoring image, a region storage unit that stores a monitoring region, and an abnormality that detects an abnormality from the background image and the reference image. A detection unit is provided, the monitoring area provided in the image area is further divided into a plurality of small areas, and an abnormality is determined by comparing the background image signal and the reference image signal for each small area,
By transmitting the image information to a monitor at a remote place through the telephone line or the like and monitoring the image information, the abnormal area can be easily specified and transmitted to the monitor.

An intruding object detection area smaller than the monitoring area is further provided in the monitoring area provided in the image area, and an abnormality is determined by comparing the background image and the reference image in the intruding object detection area to detect an abnormality. In this case, an abnormal portion in the monitoring area is detected, and the abnormal information is transmitted to a monitor at a remote place through the telephone line or the like for monitoring, whereby rapid abnormality detection can be performed.

The intruding object detection area is a plurality of small areas out of the small areas provided in the monitoring area, and an abnormality is determined in each of the small areas to determine an abnormality in the intruding object detection area. Thus, the information on the abnormality determination in the intruding object detection area can be directly used as the information on the abnormal portion.

Abnormality determination in the small area is surely performed by obtaining the correlation between the background image signal and the reference image signal for each small area, and determining that the correlation value is equal to or less than a predetermined integral value as an abnormality. Moreover, the abnormality in each small area can be determined.

To determine the abnormality, the difference between the signal levels of the background image signal and the reference image signal for each of the small areas is obtained, and when the signal level difference is equal to or greater than a predetermined integral value, the abnormality is determined. The abnormality in each small area can be easily determined.

In the abnormality determination, a new threshold value for the abnormality determination can be set by determining the abnormality when the number of small areas determined to be abnormal in the intruding object detection area is a predetermined number or more.

The abnormality information transferred to a remote place via a telephone line or the like is composed of image information of a small area determined to be abnormal and a number indicating the position on the screen of the small area numbered beforehand to the small area. , The amount of transmitted information is reduced.

The restoration display of the image on the monitor can be easily performed by previously capturing the background image in the normal state and displaying the small area image information transferred to the background image by inserting it into the position indicated by the number. It is possible to restore and display.

The abnormal information transferred to a remote place through a telephone line or the like is further limited to the number indicating the position on the screen which is previously numbered in the small area determined to be abnormal, so that the amount of transmitted information is further reduced.

In the image restoration display on the monitor, the background image at the normal time is captured in advance, and the position indicated by the number of the small area transferred to the background image is displayed by blinking the same color. Abnormal parts are displayed prominently.

By providing screen position input means, the small area division information or the intruding object detection area input by the means is displayed on a monitor and transferred by a telephone line or the like to be stored in the area storage section to store the small area. Alternatively, by setting the intrusion area, the small area or the intruding object detection area can be arbitrarily set according to the environment of the monitoring target.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The video surveillance device according to the present invention will be described below.
This will be described in detail with reference to the drawings. FIG. 1 is a block diagram of (A) camera unit and (B) monitor unit of one embodiment of a video monitoring apparatus according to the present invention, and FIG. 2 is a schematic view of a monitor video screen of one embodiment of a video monitoring apparatus according to the present invention. is there. In the camera section, the video signal from the TV camera 1 installed at the surveillance place is converted into a digital video signal in the analog / digital conversion section 2, and the image signal at the normal time is stored in the background image storage section 3 and the image signal at the time of monitoring is stored. It is stored in the reference image storage unit 4. Area storage unit 6
In advance, the monitoring area 22 in the monitoring video screen 21 is set to 20 ×
The division information of the small areas 23, 23, ..., Which are finely divided from 20 pixels to 30 × 30 pixels, is stored. In the abnormality determination unit 5, the small areas 23, 23 in the monitoring area 22,
..Each time, the video signal of the background image storage unit 3 and the video signal of the reference image storage unit 4 are compared to determine an abnormality, and if an abnormality is detected, the image information of the small area is called by a modem or the like in the transmission / reception unit 7. The signal is transferred to the monitor section as a signal on the line L1. In the monitor unit, the transmitter / receiver 8 receives the same signal, and the image information of the small area is stored in the abnormal image storage unit 10 by the mode in the transmitter / receiver 8 or the like. The image restoration unit 11 reads out the entire image signal from the background image storage unit 9 in which the image signal in the normal state transferred in advance from the camera unit is stored, and
The image signal of the abnormal portion is read from the abnormal image storage unit 10, embedded in the background image to restore the abnormal image, and the digital / analog conversion unit 12 converts the image signal into an analog signal and displays it on the video monitor 13.

FIG. 3 is a schematic diagram of a monitor image screen of another embodiment of the image monitor apparatus according to the present invention. In this example,
In the area storage unit 6 of FIG. 1, an intruding object monitoring area 34 smaller than the monitoring area 32 in advance in the monitoring area 32 of the monitoring video screen 31.
Set and memorize. In the abnormality determination unit 5, the background image storage unit 3 and the reference image storage unit 4 within the intruding object monitoring area 34.
When the abnormality is detected by comparing the image information stored in the same area and the abnormality is detected, the abnormal portion in the entire monitoring area is further detected, and the image information of the abnormal portion is stored in the transmitting / receiving unit 7. It is transferred to the monitor unit as a signal on the telephone line L1 by modem or the like. In the monitor unit, the image information of the abnormal portion is received by the transmission / reception unit 8 and is stored in the abnormal image storage unit 10 as original image information in the mode in the transmission / reception unit 8. The image restoration unit 11 reads the entire image signal from the background image storage unit 9 in which the normal-time image signal transferred from the camera unit is stored in advance, and the abnormal portion image signal from the abnormal image storage unit 10 to read the background image. The abnormal image is restored by embedding it in the image, converted into an analog video signal by the digital / analog converter 12, and displayed on the video monitor 13.

The detection of the abnormality in the intruding object monitoring area by the abnormality determining section 5 can be performed by comparing the background image of the entire intruding object monitoring area with the reference image.
Anomalous object monitoring area 3 in some of the small areas 33, 33, ...
4 can be configured to detect an abnormality by comparing the background image with the reference image for each small area.

For the abnormality determination in the small area in the abnormality determining unit 5, the abnormality determining unit 5 calculates the correlation between the background image and the abnormal image in each small area, and the correlation is smaller than a predetermined constant value. Sometimes it can be determined to be abnormal. As another method for determining abnormality in the small area, the abnormality determination unit 5 compares the image signal levels of the background image and the abnormal image of each small area, and the signal level difference is a predetermined value. It can also be determined to be abnormal when it is larger.

As described above, in detecting an abnormality in the intruding object detection area, the abnormality determining section 5 takes a correlation between the background image signal and the reference image signal in the entire intruding object detection area, and the correlation is a predetermined constant value. Although it can be determined that the abnormality is smaller than the value, the abnormality can also be determined by taking the correlation for each small area from the small area in the intruding object detection area as described above. Furthermore, the abnormality is determined for each small area as described above, and when the number of small areas determined to be abnormal among the small areas in the intruding object monitoring area is greater than a predetermined constant number, it is determined that the entire abnormality has occurred. It can also be determined.

As image information of an abnormal small area to be transmitted to a remote place via a telephone line, a normal small area can be sequentially transmitted as empty information, but the image information of the abnormal small area and It is also possible to send a pre-numbered number to the small area. The monitor unit stores the image information of the abnormal small area at the address specified by the number in the abnormal image storage unit 10, and the image restoration unit 11 transfers the image signal of the normal time transferred from the camera unit in advance. The entire image signal is read from the background image storage unit 9 that stores the image, the image signal of the abnormal portion is read from the abnormal image storage unit 10, and the image signal is embedded at a predetermined position in the background image to restore the abnormal image to digital / digital After being converted into an analog signal by the analog converter 12, the image is displayed on the video monitor 13.

Further, the image information of the abnormal small area to be transmitted to the remote place by the telephone line may be only the number given in advance to the abnormal small area. In the monitor section,
Abnormality information is stored in the abnormal image storage unit 10 at the address specified by the number of the abnormal small area, and the image restoration unit 1
In step 1, the entire image signal is read from the background image storage unit 9 in which the normal-time image signal transferred in advance from the camera unit is stored and displayed on the video monitor 13, and the abnormal information is read from the abnormal image storage unit 10. Alternatively, it can be displayed by blinking red or the like on the relevant part of the monitor video screen of the video monitor. In this case, the abnormality is conspicuously displayed, and when the small area is small to some extent, the entire contour of the abnormal portion is also displayed.

As another embodiment of the video monitoring apparatus according to the present invention, a screen position input section 15 such as a touch panel is provided in the monitor section of FIG.
The background image stored in the background image storage unit 9 is displayed at the same time, and the position information designated by the image position input unit 15 is displayed. While watching the same display, from the image position input section, set each of the monitoring area, intruding object monitoring area, and small area,
The data is transferred to the camera section through the transmission / reception section 8, and the area setting section 16 of the camera section stores each area in the area storage section 6.

[0034]

As described above, it is possible to quickly detect an abnormality by further dividing the monitoring area into small areas and determining an abnormality in the small area. Further, by transmitting only the image signal in the abnormal small area through a telephone line or the like, it is possible to construct a video monitoring device in a remote place with a high transmission speed.

[Brief description of the drawings]

FIG. 1 (A) of an embodiment of a video surveillance apparatus according to the present invention.
It is a block diagram of a camera part and a (B) monitor part.

FIG. 2 is a schematic diagram of a monitor video screen of an embodiment of a video monitor apparatus according to the present invention.

FIG. 3 is a schematic diagram of a monitor video screen of another embodiment of the video monitor apparatus according to the present invention.

[Explanation of symbols]

 1 TV camera 2 analog / digital conversion unit 3 background image storage unit 4 reference image storage unit 5 abnormality determination unit 6 area storage unit 7 transmission / reception unit 8 transmission / reception unit 9 background image storage unit 10 abnormal image storage unit 11 image restoration unit 12 digital / Analog converter 13 Video monitor 14 Area designation unit 15 Image position input unit 16 Area setting unit 21 Monitoring video screen 22 Monitoring area 23 Small area 31 Monitoring video screen 32 Monitoring area 33 Small area 34 Intruding object monitoring area

Claims (11)

[Claims] 1. An image pickup device such as a television camera captures an image signal, and the image signal is signal-processed to detect an abnormality of a subject, and the abnormality information is transferred through a telephone line or the like to transfer the abnormality at a remote place. In a video monitoring device that receives information and displays it on a television monitor or the like to monitor the subject, a background image storage unit that stores standard image information, a reference image storage unit that stores a monitoring image, a monitoring area, and the like are provided. An area storage unit for storing and an anomaly detection unit for detecting an anomaly from the background image and the reference image are provided, and the monitoring area provided in the image area is further divided into a plurality of small areas for each small area. An image monitoring apparatus characterized by comparing a background image signal with a reference image signal to determine an abnormality, and transmitting image information of an abnormal small area to a monitor at a remote place through the telephone line or the like for monitoring. . 2. An intruding object detection area smaller than the monitoring area is further provided in the monitoring area provided in the image area, and a background image and a reference image are compared in the intruding object detection area to determine an abnormality, When an abnormality is detected in the intruding object detection area, an abnormal portion in the entire monitoring area is detected, and the abnormality information is transmitted to a monitor at a remote place through the telephone line or the like and monitored. apparatus. 3. The intruding object detection area is a plurality of small areas out of the small areas provided in the monitoring area, and an abnormality is determined in each of the small areas to determine an abnormality in the intruding object detection area. The video monitoring device according to claim 2, wherein the video monitoring device is performed. 4. The abnormality determination in the small area is performed by obtaining the correlation between the background image signal and the reference image signal for each of the small areas, and determining that the abnormality is equal to or less than a predetermined integral value. The video surveillance device according to claim 1 or 3, which is characterized. 5. The abnormality is determined by determining the difference between the signal levels of the background image signal and the reference image signal for each of the small areas, and determining that the difference is equal to or greater than a predetermined integral value. The video surveillance device according to claim 1 or 3, characterized in that. 6. The abnormality determination is performed when the number of small areas determined to be abnormal in the intruding object detection area is greater than or equal to a predetermined fixed number, and the abnormality is determined. The video surveillance device according to claim 4 or 5. 7. The abnormality information transferred to a remote place by a telephone line or the like is image information of a small area determined to be abnormal and a number indicating the position on the screen of the small area numbered in advance to the small area. The video surveillance device according to claim 1, claim 3, claim 4, claim 5, or claim 6, characterized in that. 8. The display of an image on a monitor is such that a background image in a normal state is captured in advance, and the small area image information transferred to the background image is embedded and displayed in the position indicated by the number. The video surveillance device according to claim 7. 9. The abnormality information transferred to a remote place by a telephone line or the like is only a number representing the position on the screen of the small area pre-numbered to the small area determined to be abnormal. The video surveillance device according to claim 1, claim 3, claim 4, claim 5, or claim 6. 10. The display of an image on a monitor is such that a background image in a normal state is captured in advance, and the position indicated by the number of the small area transferred to the background image is displayed by blinking the same color. The video monitoring device according to claim 9, which is characterized. 11. A screen position input means is provided, and the small area division information or the intruding object detection area input by the means is displayed on a monitor and transferred by a telephone line or the like to be stored in the area storage part. 3. A small area or an intruding object detection area is set, claim 1, claim 2,
Claim 3, Claim 4, Claim 5, Claim 6, Claim 7,
The video monitoring device according to claim 8, 9, or 10.