JP2003051075A - Device for deciding suspicious person - Google Patents

Abstract

PROBLEM TO BE SOLVED: To discriminate a suspicious person who intrudes into a facility by monitoring the facility with a simple configuration and at a low cost. SOLUTION: A suspicious person deciding device is provided with a difference means 221 for entirely or partially difference images adjacent in the vicinity of at least a prescribed interval, obtained by imaging a prescribed area, an abnormality deciding means 222 for comparing the difference with a prescribed threshold, deciding that abnormality exists on the basis of the magnitude of the difference after change occurs, considering that the change occurs in the case the difference is equal to or greater than the prescribed threshold, and deciding that no abnormality exists in the case the difference is not equal to or greater than the prescribed threshold, and a deciding means 223 for deciding that a suspicious person exists in the prescribed area in case that decision that abnormality exists occurs by the prescribed number of times within a prescribed time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspicious person determination device or the like used for security or surveillance.

[0002]

2. Description of the Related Art Conventionally, in order to check whether a resident such as an apartment or a facility, a user of a facility, or a company such as a mail delivery company, that is, a person other than a person concerned has invaded the facility, There were security guards stationed at, and the security company managed them.

FIG. 7 shows the structure of a conventional monitoring system. As shown in the figure, the monitoring room 710 includes a monitoring terminal 711, and the monitoring terminal 710 includes the corridor 721 and the first room 72 in the facility 720 to be monitored.
2. The monitor cameras 730a, 730b and 730c respectively provided in the second and second rooms 722b are connected to display the images received by the monitor cameras 730a, 730b and 730c.

As a result, the person in the monitoring room 710 is
It is possible to monitor the traffic of people in each part of the facility 720 and, if there is a suspicious person or a suspicious object, immediately give a warning, take appropriate action such as contacting the police.

[0005]

However, in order to perform monitoring using a monitor camera, a person in the monitoring room 710 must always watch the monitor during the monitoring time. Therefore, the supervisor needs to be a specialized company such as a security company who can work 24 hours a day or at night, and as a result, the operation of the surveillance system is expensive.

[0006] The present invention has been made in view of the above problems, and a suspicious person determination device or the like capable of monitoring a facility with a simple structure and low cost and discriminating a suspicious person invading the facility. The purpose is to provide.

[0007]

In order to achieve the above object, the first invention (corresponding to claim 1) uses the change of the image obtained by imaging a predetermined area, A suspicious person determination device that determines whether or not a suspicious person exists in a predetermined area.

The second invention (corresponding to claim 2)
Is a difference unit that obtains a difference between all or a part of images that are adjacent to each other at least at a predetermined interval and that is obtained by imaging a predetermined area, and the difference is compared with a predetermined threshold. If it is equal to or more than the predetermined threshold value, it is considered that a change has occurred, it is determined that there is an abnormality based on the magnitude of the difference after the occurrence of the change, and if not, an abnormality determination unit that determines that there is no abnormality, and the abnormality is present. When the determination of (1) occurs a predetermined number of times within a predetermined time, a suspicious individual determination device including a determination unit that determines that a suspicious individual is present in the predetermined area.

A third aspect of the present invention (corresponding to claim 3)
3. The suspicious individual determination device according to claim 2, wherein the abnormality determination means determines the presence of the abnormality when the magnitude of the difference after the occurrence of the change is constant for a predetermined period or longer.

A fourth invention (corresponding to claim 4)
Is the suspicious individual determination device according to the second aspect of the present invention, wherein the predetermined interval can be set from the outside.

The fifth invention (corresponding to claim 5)
Is the suspicious individual determination device according to the second aspect of the present invention, wherein the predetermined time and / or the predetermined number of times in the determination means can be set from the outside.

A sixth aspect of the present invention (corresponding to claim 6)
Is a suspicious individual determination device according to the third aspect of the present invention, wherein the position and / or size of a part of the image for which the difference is obtained by the difference means can be set from the outside.

A seventh aspect of the present invention (corresponding to claim 7)
Is the magnitude of the predetermined threshold value in the abnormality determination means,
It is the suspicious individual determination device according to the second aspect of the present invention that can be set from the outside.

An eighth aspect of the present invention (corresponding to claim 8)
Generates judgment information including the judgment result of the judgment means,
It is the suspicious individual determination device according to the second aspect of the present invention, further including a notification unit that notifies the determination information to the outside.

The ninth invention (corresponding to claim 9)
Is the suspicious individual determination device according to the eighth aspect of the present invention, wherein the notification means notifies the determination information in a predetermined time zone that can be set from the outside.

A tenth aspect of the present invention (corresponding to claim 10) is the suspicious person determination device according to the eighth aspect of the present invention, wherein the determination information includes all or part of the image corresponding to the determination result. is there.

The 11th aspect of the present invention (corresponding to claim 11) is the suspicious person determination device according to the 8th aspect of the present invention, wherein the determination information is notified to the outside through a network.

The twelfth aspect of the present invention (corresponding to claim 12) is the suspicious person determination device according to the eleventh aspect of the present invention, wherein the determination information is distributed as electronic mail on the network.

The thirteenth aspect of the present invention (corresponding to claim 13) is to determine the suspicious individual according to the second aspect of the present invention, which is provided with alarm means for generating warning information based on the determination information and transmitting the warning information. It is a device.

The 14th aspect of the present invention (corresponding to claim 14) is the suspicious individual determination device according to the 13th aspect of the present invention, wherein the warning information is transmitted to the predetermined area.

In the fifteenth aspect of the present invention (corresponding to claim 15), the alarm information is transmitted a plurality of times at a predetermined interval, and the content is different each time the alarm information is transmitted.
It is the suspicious person determination device according to the third or fourteenth aspect of the present invention.

The sixteenth aspect of the present invention (corresponding to claim 16) records all or part of the captured image, the history of the judgment operation of the abnormality judging means, and the history of the judgment operation of the judging means. The suspicious individual determination device according to the second aspect of the present invention, which includes the history recording means for

The seventeenth aspect of the present invention (corresponding to claim 17) is the suspicious person according to any one of the fourth to seventh or ninth aspects of the present invention, wherein the setting from the outside can be performed through a network. It is a determination device.

The eighteenth aspect of the present invention (corresponding to claim 18) is the image of the predetermined interval, the predetermined time and / or the predetermined number of times of the judging means, and the image of the difference taken by the difference means. Position and //
Alternatively, the suspicious individual determination device according to the second aspect of the present invention, the size and all or some of the conditions for the difference unit to obtain the difference are changed according to the time zone in which the imaging is performed.

The nineteenth aspect of the present invention (corresponding to claim 19) is that the suspicious individual determination device according to the second aspect of the present invention is adjacent to the front and rear at least at predetermined intervals obtained by imaging a predetermined area. Difference means for taking the difference of all or part of the image to be compared with the difference and a predetermined threshold value, if the difference is greater than or equal to the predetermined threshold value, it is considered that a change has occurred, and after the change has occurred, If there is an abnormality based on the magnitude of the difference, and if not, there is an abnormality determining means that determines that there is no abnormality, and if the determination that there is an abnormality occurs a predetermined number of times within a predetermined time, the predetermined area Is a program for causing a computer to function as all or a part of the determination means for determining that there is a suspicious person.

The twentieth aspect of the present invention (corresponding to claim 20) is that the suspicious person determination device according to the second aspect of the present invention is adjacent to the front and rear at least at a predetermined interval obtained by imaging a predetermined area. Difference means for taking the difference of all or part of the image to be compared with the difference and a predetermined threshold value, if the difference is greater than or equal to the predetermined threshold value, it is considered that a change has occurred, and after the change has occurred, If there is an abnormality based on the magnitude of the difference, and if not, there is an abnormality determining means that determines that there is no abnormality, and if the determination that there is an abnormality occurs a predetermined number of times within a predetermined time, the predetermined area Is a medium that carries a program for causing a computer to function as all or a part of a determination unit that determines that a suspicious person exists, and is a medium that can be processed by the computer.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram of a monitoring system constructed mainly with a suspicious person determination device according to Embodiment 1 of the present invention. In FIG. 1, the monitoring system is
The monitor camera 111 arranged at the monitoring place 110 in the facility 100 and the capture means 2 on the monitor camera 111.
The monitoring room 200 in which the suspicious person determination device 220 connected via 10 is arranged, and the external information terminal 400 which communicates with the suspicious person determination device 220 via the internet 300.

The monitor camera 111 is realized by, for example, a home video camera or a CCD small monitor camera for a personal computer, and corresponds to a predetermined area of the present invention, which is a monitoring place 1.
It is a means for imaging a predetermined imaging range within 10 and outputting it as a video signal to the suspicious person determination device.

The capture means 210 is the monitor camera 1.
It is a means for capturing the image captured by 11 as a still image for each frame and outputting it to the suspicious person determination device 220.

Next, in the suspicious person determination device 220, the difference means 221 acquires the image from the monitor camera 111 frame by frame at predetermined intervals, and obtains the difference between the images of one frame at each interval. It is a means to take. Further, the abnormality determining unit 223 compares the magnitude of the difference acquired by the difference unit 221 with a predetermined threshold value set in advance, and if the difference is equal to or more than the threshold value, considers that a change has occurred, and after the change occurs, It is a means for determining the presence or absence of abnormality by measuring the magnitude of the difference and generating the respective determination results. Further, the judging means 223 stores the judgment result of the abnormality judging means 223, refers to the timer 224, and if the judgment result of abnormality occurs a predetermined number of times within a predetermined time, the monitor camera 111 captures an image. It is a means to judge that a suspicious person is reflected in the image. Further, the notification means 225 is means for generating information including the judgment result of the judgment means 223 as judgment information and outputting this. The display unit 226 is realized by, for example, a CRT or a liquid crystal display, and is a unit for displaying judgment information. Also,
The communication unit 227 is a unit that is realized by, for example, a modem or a wireless communication terminal, and transmits determination information to the Internet 300 that is an example of the network of the present invention. The setting interface 228 is a means for setting each parameter of the difference means 221, the abnormality determination means 222, and the determination means 223.

The external information terminal is a means realized by, for example, a mobile phone 401 capable of connecting to the Internet or a personal computer 402 having a similar function. In addition,
Internet 300 is an example of the network of the present invention, and the other network may be a WAN such as a LAN or an intranet.

Next, FIG. 2 is a diagram showing a flow chart for explaining the operation of the suspicious person determination device of the present invention.

3 (a), 3 (b) and 3 (c) are diagrams showing images taken by the monitor camera 111 for explaining the operation of the suspicious person determination device of the present invention.

The operation of the monitoring system using the suspicious person determination device according to the embodiment of the present invention having the above-described configuration will be described with reference to the flow chart of FIG. 2 and FIG. The operation of the suspicious individual determination method of the present invention will be described. However, in the following description, as an example of the monitoring place 110, the entrance of the room facing the corridor will be taken as an example, and the corridor is essentially unattended except for temporary personnel such as mail delivery. Shall be normal.

First, the monitor camera 111 continuously captures images in the corridor (S1).

The monitored video signal is output to the capture means 210. The capture unit 210 outputs the input video signal as an image signal for each frame to the suspicious person determination device 220 (S2).

In the suspicious person judging device 220, when the difference means 221 receives an image signal, the difference means 221 acquires it at a predetermined interval. At this time, if the monitor camera 111 is a normal video camera, one frame is 1/30 second, so if the interval is set to 5 minutes, the difference means acquires an image of one frame every 60 frames.

Further, the difference means 221 obtains the difference between before and after the acquired image and obtains its size (S3).

Here, FIG. 3 (a) is a diagram for explaining an image of an unmanned corridor. (A) is an image at the time of predetermined imaging, (A) is an image obtained after 5 minutes from (A), (C) is an image obtained after 10 minutes from (A), ( (D) is an image in a state in which 15 minutes have passed from (a). The difference means 221 takes the difference between this image (a) and the image (a), then takes the difference between the image (c) and the image (a), and obtains the difference between the image (d) and the image (c). To take.

At this time, the parameter serving as the difference is obtained by dividing the two images for which the difference is to be obtained into a predetermined number of pixels and taking the difference in the information of the corresponding individual pixels. For example, if the pixels forming the image have an information amount of 1 byte, each pixel of the two images has 8 bits of information. The difference means 221 determines that there is a difference when there is a difference by checking whether the information (0 or 1) of each bit is the same in the preceding and subsequent images.
The difference is counted in bit units, and this count value becomes the difference value.

Hereinafter, description will be made according to the state of the corridor imaged by the monitor camera 111.

In the example shown in FIG. 3 (a), since the corridor is unmanned and no difference is generated, each difference value is output as "0" to the abnormality determining means 222.

Upon receiving the input of the difference value, the abnormality determining means 222 compares the threshold value set in advance with the input difference value. In this case, since the difference value is 0, it does not exceed the threshold value set in the difference unit 221. Therefore, the abnormality determining means determines "no abnormality"("N" in S4). If there is no abnormality, the operations of S1 to S3 are continued.

Next, FIG. 3 (b) is a diagram for explaining an image in which a suspicious person has entered the corridor and its pattern is captured.
The time passages of (a), (a), (c), and (d) are the same as those in FIG. 3 (a), but in each of the images of (a) and (c), a silhouette 500a and a silhouette 500b are respectively included. Is reflected.

The difference means 221 calculates the difference between the image (a) and the image (a), and then the image (c) and the image (a).
And the difference between image (d) and image (c). The difference value A between the image (a) and the image (a) is 50
It is larger by the amount of 0a. Further, the difference value B between the image (c) and the image (a) is 0 because the figure 500b is located at substantially the same position and size as the figure 500a.
Is. Further, the difference value C between the image (d) and the image (c)
Is 0 because the human figure 500c is in substantially the same position and size as the human figure 500b, and is kept substantially the same as the difference value C and the difference value B.

Upon receiving the input of the difference value, the abnormality determining means 222 compares the preset threshold value with the input difference value. In this case, the difference value A is obtained first. And these are values equal to or greater than the threshold value set in the difference unit 221. Therefore, the abnormality determination means 222 considers that a change has occurred (“Y” in S4), and measures the magnitude of the difference thereafter. Next, the difference value B is obtained, and then the difference value C is obtained. As described above, the difference values B and C are substantially the same, that is, the magnitude of the difference after the change occurs is kept constant (S5). At this time, the abnormality determination means 222 determines that there is an abnormality, and outputs the determination result to the determination means 223 (“Y” in S5).

When the judgment means 223 receives the judgment result input, the judgment means 223 judges how many times the judgment result of "abnormality" has been inputted within a predetermined time by referring to the time measured by the timer 224 (S7). .

When the judgment result of "abnormality" is input a predetermined number of times, the judgment means 223 judges that there is a suspicious person in the corridor imaged by the monitor camera 111 (S8).

On the other hand, when a person such as a mail delivery person passes through the corridor, is it rarely stationary in front of the door?
Since it is a short time even if there is, it rarely appears in the image for taking the difference. For example, as shown in FIG. 3C, in the images (A), (B), (C), and (D), the person is reflected only in the image (A) including the person 500d.

In this case, the abnormality determining means 222 first obtains the difference value A from the difference between the image (a) and the image (a), but this is a value equal to or larger than the threshold value set in the difference means 221. Even if it is, the difference value D between the image (c) and the image (a) is obtained next, which is almost the same as the difference value A, while the difference value E obtained next is , And the difference value between image (d) and image (c), which is substantially zero. That is, the difference value E and the difference value D have different sizes and are not constant. That is, the magnitude of the difference after the change occurs is not kept constant (N in S5).

At this time, the abnormality determining means 222 determines "no abnormality" and returns to S1 to loop the operation. This determination result is output to the determination means 223 (“Y” in S5).

Next, the judgment means 223 determines that there is a suspicious person.
The result of the determination is output to the notification means 225.

Upon receiving the input of the judgment result, the notifying means 225 generates judgment information including this content (S9) and outputs it to the communication means 227 or the display means 226.

Upon receiving the judgment information, the communication means 227 transmits it to the external information terminal 400 via the Internet 300. The content of the determination information may include information such as the date and time when the determination result was obtained in addition to the determination result. It may also include information on the location monitored by the monitor camera 111. At this time, the form of the determination information may be an e-mail if the external information terminal 400 is e-mail compatible, or may be a web page content form if it is WWW browser compatible. In particular, when using a Web page, the content of the content may be automatically rewritten using the CGI of a server (not shown) provided between the suspicious person determination device 220 and the external information terminal 400.

By the way, in the above description, the notification means 225 outputs the judgment information when the judgment result of the judgment means 225 is "there is a suspicious person". Depending on the location of the location 110 and the monitoring time slot, even if the abnormality determining unit 222 and the determining unit 223 are operating normally, the traffic of people is heavy, and therefore the determination result of “suspicious person” is constantly output. ,
Judgment information may always be output.

In this case, if the judgment information is sent to the external information terminal 400 by e-mail, for example, the external information terminal 400 is always receiving the judgment information e-mail, and the monitoring system There are practical problems.

In order to deal with such a problem, the notification means 225 sets the time zone in which the judgment information is output based on the input from the setting interface 228, and outputs the judgment information only in this time zone. .

For example, the abnormality determining means 222 and the determining means 223 continue to operate for 24 hours from midnight to 11:59 pm, while the notifying means 225 operates when the number of people in the monitoring place 110 decreases. It is possible to set it between 10 pm and 6 am. In this case, the judging means 223 outputs the judgment result during 24 hours, but the notifying means 225 generates the judgment information from 10 pm to 6 am. Therefore, the judgment result obtained during this period. Only this will be output to the outside as judgment information.

As a result, it is possible to narrow down the contents of the judgment information to more reliable ones and to announce only the useful judgment information.

The time zone of the notification means 225 is set to the above-mentioned midnight hours on weekdays and 24 hours on weekends and holidays depending on the traffic situation of the monitoring place 110. It may be set arbitrarily.

At this time, the image which is the basis of the determination result of "there is a suspicious individual" may be attached to the notification information such as the electronic mail as an image file. Further, at this time, the image may be a still image which is the basis of the determination result of the determination unit 223 and which gives the abnormality determination unit 222 a determination of "abnormal". At this time, the still image may be all the images having the difference value that gives the determination of abnormality, or may be a part of the single image or a plurality of images.

On the other hand, the display means 226 displays the judgment information. At this time, the image that is the basis of the determination result of “abnormality” may be displayed at the same time.

As described above, according to the monitoring system using the suspicious person determination device according to the present embodiment, the presence or absence of a suspicious person is determined based on the difference between the images obtained by imaging the area to be monitored. Only when it is judged that there is a suspicious person, the judgment result can be announced to the outside as judgment information. As a result, it is possible to manage whether or not there is a suspicious person at the monitoring place without the monitoring person constantly checking the monitor camera.

In the above description, the difference means 2
Although the reference numeral 21 takes the difference of the entire area of the image obtained from the capture means 210, the difference means 221 may select a part of the obtained image and take the difference only for this selected area. .

That is, as shown in images (A) and (B) of FIG. 4, only selected regions 600a and 600b surrounded by dotted lines in the figure are extracted from the entire images (A) and (B), and adjacent to each other. Select area 600 for each of the images
The difference value is obtained only with a and 600b.

In such a configuration, it is expected that a difference will always occur in the entire imaged image, and the selection areas 600a and 600b that require monitoring,
It is possible to distinguish in advance from the remaining areas 610a and 610b in which it is considered that no difference is generated and monitoring is unnecessary. As a result, the process of obtaining the difference is omitted for the remaining areas 610a and 610b, so that it is possible to improve the monitoring accuracy and reduce the addition of the process of the difference unit 221.

(Embodiment 2) FIG. 5 is a block diagram of a monitoring system constructed mainly with a suspicious person determination device according to Embodiment 2 of the present invention. 5, parts that are the same as or equivalent to those in FIG. 1 are given the same reference numerals, and detailed description thereof will be omitted.
Further, in the suspicious person determination device 220 ', the warning means 62
0 is a means for generating warning information based on the judgment information. The speaker 621 is a means installed in the monitoring place 110, and is a means for outputting warning information as a voice signal.

The suspicious person determination device of the present embodiment having such a configuration performs the same operation as that of the first embodiment, but when the determination means 223 determines "there is a suspicious person". The alarm is issued directly to the monitoring place 110.

That is, the alarm means 620 is the notification means 2
The judgment information generated by 25 is acquired, and warning information is generated. The warning information may be a mechanical sound such as a buzzer sound or a siren sound, as long as it gives a warning to a suspicious person who is likely to stay at the surveillance place 110, is obtained by voice synthesis, or is preliminarily externalized. It may be voice data recorded in a recording means (not shown) (for example, a human language such as "warning! Warning!").

Further, the alarm means 620 is the judgment means 223.
While making a judgment that "there is a suspicious person", the warning information is transmitted continuously at a predetermined interval, but the content thereof may be different at each transmission interval. For example, it is assumed that the first alarm information is voice data in human language, the second alarm data has different contents, and the alarm information after the third alarm is a siren sound. This allows
It is possible to promptly prompt a suspicious person who is likely to stay at the surveillance place 110 to leave the surveillance place 110.

Although the alarm information is output directly from the speaker 621 installed in the monitoring place 110, it is assumed that the alarm information is output to the external information terminal 400 via the Internet 300 similarly to the determination information. Alternatively, it may be transmitted to the police or a security company using a telephone or another public communication line.

Further, in each of the above-described embodiments, the difference means 221 has been described as a predetermined interval for taking a difference between images obtained every 5 minutes, but this interval is the monitoring place 110. The time may be changed depending on the time zone.

For example, in the case of a condominium or the like, when monitoring is performed during the daytime, it is considered that the traffic of people at the monitoring place 110 is more intense than at night. There is a possibility that the frequency of performing the “presence” determination and the determination unit 223 performing the “suspicious person presence” determination is more than necessary.

On the other hand, if the operation interval of the difference means 221 is set to be larger in the daytime than in the nighttime based on the time zone measured by the timer 224, the "suspicious person exists" more than necessary. The chance of making a decision is reduced, and more accurate monitoring can be performed.

At this time, the interval change is not limited to two during the daytime and nighttime, but may be performed over three or more fine time zones. Further, the size of the selection area 600 as shown in FIGS. 4A and 4B may be changed according to the time zone, not limited to the operation interval of the difference unit 221.

Further, in the first embodiment, the parameter for giving the difference is obtained by comparing the difference of the information contained in the image in bit units, but the same difference value may not be obtained in some cases. This is because, in two images captured at the same place, the pixels forming the image must give the same information, but the accuracy of the monitor camera 111 causes a difference in the image information from image to image. It occurs because it is counted as a difference.

At this time, if the contrast of the image after the difference is taken is increased, the light (bright) portion of the gradation of the image is emphasized more and the difference in information based on the accuracy of the monitor camera is compensated. can do.

However, since the dark (dark) portion, which is going to obtain the difference at night under the same condition, is emphasized more, the information of the image necessary for obtaining the difference is lost.

In such a case, contrary to the case of the daytime, the contrast for the image after the difference is taken is lowered so that the information for obtaining the difference is left.

That is, the difference means 221 changes the condition for obtaining the difference value according to the time zone. As a result, the same difference can always be obtained from the comparison of the same two images regardless of day and night, and the information necessary for the determination and the determination can be accurately obtained.

Furthermore, the magnitude of the predetermined threshold value used by the abnormality determining means 222 for comparison with the difference value may also be changed according to the time zone. Further, the time and the number of times of occurrence of “abnormality”, which is the criterion of the determining means 223, may be changed according to the time zone.

As a result, the monitoring accuracy can be improved more finely.

Further, the interval for obtaining the difference in the difference means 221, the position and size of the selected area, the condition for obtaining the difference, the threshold value in the abnormality judgment means 222, the time and the number of times as the judgment reference in the judgment means 223, the notification means. The setting of the operating time zone of 225 and the setting of the time zone for changing the parameters of each of the above means may be individually set externally via the setting interface 228.

At this time, the setting interface 228,
By connecting to the communication unit 227, the external information terminal 400 via the Internet 300 may input parameters that can be set in the setting interface 228 by e-mail or other means.

As a result, the monitoring conditions can be changed without being resident in the monitoring room 200.

Further, as shown in FIG. 6, the history recording means 630 is provided as the suspicious person judging means 220 ″, and the image used by the difference means 221 to obtain the difference, the judgment result in the abnormality judging means 222, the judgment The determination result by the means 223 may be recorded as an operation history together with the time when each means operates.At this time, the determination result and the determination result include the cases of “no abnormality” and “no suspicious person”. You can leave it. Further, the operation history may be displayed on the display unit 226 together with the determination information, or may be output to the external information terminal 400 as the communication unit 227.

Further, although each of the above-described embodiments has been described as a case where a single monitor camera 111 is connected and used, a plurality of monitor cameras are connected and a plurality of monitoring locations are regarded as one suspicious place. You may make it monitor by a person determination apparatus.

The difference means 221 is the monitor camera 1
The moving image obtained from No. 11 is obtained from the still image of each frame captured by the capture unit 210, but the image input to the difference unit 221 has at least a predetermined difference capable of taking the difference. Any still image that is adjacent to the front and rear of the interval may be used. Therefore, the difference unit 211 may intermittently acquire images captured by the still camera at predetermined intervals. That is, a digital still camera can be installed in the surveillance place 110 as a monitor camera in addition to a video camera for moving images, and the capture means 210 can be omitted.

Further, the present invention is a program for causing a computer to execute the functions of all or some of the means (or devices, elements, circuits, units, etc.) of the above-mentioned suspicious person determination device of the present invention. , A program that operates in cooperation with a computer.

The present invention is a medium carrying a program for causing a computer to execute all or part of the functions of all or part of the above-mentioned suspicious person determination device of the present invention, which is readable by the computer and ,
The read program is a medium that executes the function in cooperation with the computer.

Some means (or devices, elements, circuits, parts, etc.) of the present invention means some of the plurality of means, or one of the means. It means some functions of.

In addition, a part of the device (or element, or
(Circuits, parts, etc.) means some of the plurality of devices, or means (or elements, circuits, parts, etc.) of one device. Or
It means a part of the functions of one means.

A computer-readable recording medium recording the program of the present invention is also included in the present invention.

Further, one use form of the program of the present invention may be a form recorded in a computer-readable recording medium and operating in cooperation with the computer.

Further, one usage form of the program of the present invention may be a mode in which the program is transmitted in a transmission medium, read by a computer, and operates in cooperation with the computer.

The computer of the present invention described above is
The hardware is not limited to pure hardware such as a CPU, and may include firmware, an OS, and peripheral devices.

The recording medium includes a ROM and the like, and the transmission medium includes an optical fiber, a transmission mechanism such as the Internet, light, radio waves, sound waves and the like.

Therefore, as described above, the configuration of the present invention may be realized by software or hardware.

[0100]

As is apparent from what has been described above, according to the present invention, there can be obtained a suspicious person determination device or the like capable of discriminating a suspicious person with a simple structure and at low cost.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a monitoring system including a suspicious person determination device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a flowchart of the operation of the suspicious person determination device according to the first embodiment of the present invention.

FIG. 3A is a diagram for explaining the operation of the suspicious person determination device according to the first embodiment of the present invention. (B) It is a figure for demonstrating operation | movement of the suspicious individual determination apparatus in Embodiment 1 of this invention. (C) It is a figure for demonstrating operation | movement of the suspicious individual determination apparatus in Embodiment 1 of this invention.

FIG. 4 is a diagram for explaining another operation example of the suspicious person determination device according to the first embodiment of the present invention.

FIG. 5 is a diagram showing a configuration of a monitoring system including a suspicious person determination device according to a second embodiment of the present invention.

FIG. 6 is a diagram showing another configuration example of the monitoring system by the suspicious person determination device according to the second embodiment of the present invention.

FIG. 7 is a diagram showing a configuration of a monitoring system according to a conventional technique.

[Explanation of symbols]

100 facilities 110 monitoring place 111 monitor camera 200 monitoring room 210 Capture means 220 Suspicious person determination device 221 Difference means 222 Abnormality determination means 223 Judgment means 224 timer 225 Notification means 226 display means 227 Communication means 228 Setting interface 300 Internet 400 External information terminal 401 mobile phone 402 personal computer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ identification code FI theme code (reference) G08B 25/10 H04N 7/18 K H04N 7/18 G01V 9/04 SF term (reference) 5B057 AA19 BA02 CA12 CA16 DB02 DC30 DC32 5C054 AA01 AA05 CA04 CC02 CH01 EA01 EA05 EA07 FA09 FC01 FC13 FE28 FF03 GB02 GB15 HA18 5C084 AA02 AA07 AA20 BB32 CC17 DD12 EE01 FF05 BB08 BB08BFF BB04CFF BB08AFF BB04AFF BA02 CA02 GA08 HA01 JA11

Claims (20)

[Claims] 1. A suspicious person determination device that determines whether or not a suspicious person is present in the predetermined area by using a change in an image obtained by capturing an image of the predetermined area. 2. A difference means for obtaining a difference between all or a part of images adjacent to each other at least at a predetermined interval, which is obtained by imaging a predetermined area, and compares the difference with a predetermined threshold, If the difference is greater than or equal to the predetermined threshold, it is considered that a change has occurred, and it is determined that there is an abnormality based on the magnitude of the difference after the change has occurred,
Otherwise, an abnormality determining unit that determines that there is no abnormality, and a determination unit that determines that there is a suspicious person in the predetermined area when the determination that there is abnormality occurs a predetermined number of times within a predetermined time. Suspicious person determination device equipped. 3. The suspicious individual determination device according to claim 2, wherein the abnormality determination unit determines the presence of the abnormality when the magnitude of the difference after the occurrence of the change is constant for a predetermined period or longer. 4. The suspicious individual determination device according to claim 2, wherein the predetermined interval can be set from the outside. 5. The suspicious individual determination device according to claim 2, wherein the predetermined time and / or the predetermined number of times in the judgment means can be set from the outside. 6. The suspicious individual determination device according to claim 2, wherein the position and / or the size of a part of the image for which the difference is obtained by the difference unit can be set from the outside. 7. The suspicious individual determination device according to claim 2, wherein the size of the predetermined threshold value in the abnormality determination means can be set from the outside. 8. The suspicious individual determination device according to claim 2, further comprising notification means for generating determination information including a determination result of the determination means and notifying the determination information to the outside. 9. The suspicious individual determination device according to claim 8, wherein the notification means notifies the determination information in a predetermined time zone that can be set from the outside. 10. The suspicious individual determination device according to claim 8, wherein the determination information includes all or part of the image corresponding to the determination result. 11. The suspicious individual determination device according to claim 8, wherein the determination information is notified to the outside via a network. 12. The suspicious individual determination device according to claim 11, wherein the determination information is distributed on the network as an electronic mail. 13. The suspicious person determination device according to claim 2, further comprising an alarm unit that generates warning information based on the judgment information and sends the warning information. 14. The suspicious individual determination device according to claim 13, wherein the warning information is transmitted to the predetermined area. 15. The suspicious individual determination device according to claim 13, wherein the alarm information is transmitted a plurality of times at predetermined intervals, and the content of the alarm information is different each time the alarm information is transmitted. 16. The suspicious article according to claim 2, further comprising history recording means for recording all or part of the captured image, the history of the determination operation of the abnormality determination means, and the history of the determination operation of the determination means. Judgment device. 17. The external setting can be performed through a network.
The suspicious person determination device according to any one of 1. 18. The predetermined interval, a predetermined time and / or a predetermined number of times in the judging means, a position and / or a size of a part of the image for which the difference is taken in the difference means, and a difference in the difference means. The suspicious individual determination device according to claim 2, wherein all or part of the conditions for obtaining the information is changed according to the time period during which the image capturing is performed. 19. The suspicious person determination device according to claim 2,
A difference unit that obtains a difference between all or a part of the images that are adjacent to each other in the front and rear at a predetermined interval obtained by imaging a predetermined area is compared with the difference and a predetermined threshold value, and the difference is the predetermined value. If it is equal to or more than the threshold value, it is considered that a change has occurred, it is determined that there is an abnormality based on the magnitude of the difference after the change occurs, and if not, an abnormality determination means that determines that there is no abnormality, and the determination of the abnormality However, when a predetermined number of times occur within a predetermined time, a program for causing a computer to function as a whole or a part of a judgment means for judging that a suspicious person exists in the predetermined area. 20. The suspicious person determination device according to claim 2,
A difference unit that obtains a difference between all or a part of the images that are adjacent to each other in the front and rear at a predetermined interval obtained by imaging a predetermined area is compared with the difference and a predetermined threshold value, and the difference is the predetermined value. If it is equal to or more than the threshold value, it is considered that a change has occurred, it is determined that there is an abnormality based on the magnitude of the difference after the occurrence of the change, and if not, there is an abnormality determination means that determines that there is no abnormality, and the determination that there is an abnormality. However, when it occurs a predetermined number of times within a predetermined time, it is a medium carrying a program for causing a computer to function as all or a part of the determination means for determining that a suspicious person is present in the predetermined area. , A medium characterized by being processable by a computer.