JP2020017154A - Portable suspicious person determination device and suspicious person determination method - Google Patents

Abstract

To provide a portable suspicious person determination device that responds only when a risk is high, and a suspicious person determination method.SOLUTION: A portable suspicious person determination device 100 comprises: a camera 110 for photographing an area around a monitored person; suspicious person determination means 120 including condition determination means 121, a risk determination criterion 122, and risk determination means 123; communication means 130; an ID 160; and a power supply 150. A determination criterion for determining a danger of a suspicious person candidate is defined depending on a condition of the suspicious person candidate in an image, a risk of the suspicious person candidate is determined based on the determination criterion, and the image is transmitted/warned based on the result.SELECTED DRAWING: Figure 1

Description

The present invention tracks a monitored person from behind or determines a suspicious person who may attack from the front or side, performs image transmission to a monitoring base station, responds to an alarm, etc., and contributes to crime prevention. The present invention relates to a determination device and a suspicious person determination method.

FIG. 5 is a diagram showing a conventional suspicious individual monitoring device.
5-A, the suspicious individual monitoring device disclosed in Patent Document 1 includes a camera for viewing the back and a portable display for viewing the back based on the data. When there is a risk of being followed by a suspicious individual, he can look behind without looking back. The possessor determines whether a person is a suspicious individual by looking at the image. Because it is necessary to walk while looking at the display, it is difficult to respond in detail.Since it is judgment and processing by yourself, it is necessary to judge and respond on the spot, and it is difficult to use for young people. is there.
5-B, which is shown in Patent Document 2, automatically starts photographing when a preset time comes, takes a photograph at a set time interval, and sends a photograph to a designated server through a telephone line for each photographing. It is a portable terminal worn by the holder to send a photo and finish shooting and transmission at a preset time.
Since a picture is taken and the image is transmitted during the set time, the image data becomes extremely large, and there is a disadvantage that the data amount overflows when many people use it. Further, since there is no judgment function, the data to be sent is all captured images, and there is a high possibility that the data will be sent. Further, even if there is a risk, no judgment is made, and even if there is an image, there is a possibility that the person himself does not notice the risk. In addition, since there is no judgment at the destination, it is difficult to respond in real time.
5-C, which is a fixed-point observation device for observing a predetermined area where important objects are stored, such as a bank safe, is disclosed in Patent Document 3, and has a face in an image. This is a device that, when detecting the presence of a person whose face is hidden near the detection of, detects that there is a suspicious person and outputs an alarm.
In a bank or the like, there is usually no one other than a bank employee in front of a safe, and a situation where a person whose face is hidden accompanies is guiding while threatening. Although it is good for such applications, it is equivalent to a camera installed at a fixed point on the road, and is not suitable for observing a moving pedestrian at any time. Cannot be handled because it is commonly seen. That is, this state is a state where it is not yet dangerous on the road.
In addition, it is important to change the criteria for determining dangers such as tracking time, approached area, and number of corners, depending on the conditions such as hiding the face and changing the direction of coming along according to the characteristics of the moving state on the road. However, such an idea was not shown in the prior art, and was expected.

JP-A-2004-236347 JP 2007-207211 JP 2012-50031 A

The problem of the present application is to determine a criterion for determining the danger of a suspicious candidate in an image, determine a risk of the suspicious candidate based on the criterion, and transmit an image based on the result. An object of the present invention is to provide a portable suspicious individual determination device and a suspicious individual determination method that perform these measures only when a risk is high by issuing an alarm.

The following is described along with the claims.
The invention according to claim 1 is a portable suspicious individual determination device,
The monitored person is to be carried by attaching to a body or a worn hat or clothing, etc., and is activated when the monitored person feels uneasy or fear of a suspicious candidate or feels a need, Letting the user take an image, determine the risk of the suspicious individual candidate, and, as a result of the determination, perform an action including at least transmission of suspicious individual information to an external monitoring base station,
A camera that captures the image of the periphery of the monitored person by the activation and takes the image, and a suspicious person determination unit that determines whether or not the suspicious person candidate reflected in the captured image is at risk as a suspicious person, Communication means for transmitting at least the suspicious individual information including the image to the monitoring base station in response to the result of the determination that there is the risk; an identification code (ID) for identifying the individual of the monitored person; And a power source for supplying the suspicious person, wherein the suspicious person determining means includes: Condition determining means for determining a difference in conditions for determining from the characteristics of the suspicious individual candidate in the image, wherein the criterion is determined depending on the degree of influence of the conditions on the risk. This The features.

The invention according to claim 2 is the portable suspicious individual determination device according to claim 1,
When the suspicious person candidate enters within a predetermined distance from the monitored person, the risk criterion item includes a distance L for determining that there is a risk, and an appearance of the suspicious person candidate in the image. It is characterized by including at least one of the time t and the number c of corners that have turned the same corner as the monitored person.

The invention according to claim 3 is the portable suspicious individual determination device according to claim 1 or 2,
The item of the condition, whether the suspicious person candidate is approaching the monitored person from the front or side in the image, and whether the suspicious person candidate in the image hides the face, And at least one of them.

According to a fourth aspect of the present invention, in the portable suspicious individual determination device according to any one of the first to third aspects, the suspicious individual determination means includes a third party between the suspicious individual candidate and the monitored person. It is characterized by having an intervening person judging means for judging whether the person is an intervening person.

The invention according to claim 5 is a portable suspicious individual judging device according to any one of claims 1 to 4,
The camera, besides a visible light camera, includes an infrared camera as a face hiding correspondence when the suspicious person candidate hides a face, and the image of the infrared camera is the infrared image only of the face portion It is characterized by.

The invention according to claim 6 is a suspicious person determination method,
The monitored person carries the portable suspicious individual judging device according to any one of claims 1 to 5, and activates the portable suspicious individual judging device at any time when monitoring becomes necessary, The portable suspicious person determination device captures the image of the periphery of the monitored person with the camera, acquires the characteristic presented by the suspicious person candidate reflected in the image as the condition, and considers the condition. A risk judgment criterion is determined in advance, the risk property (degree of risk) of the suspicious person candidate is judged based on the risk judgment criterion, and the identification code (ID) and the image of the suspicious person candidate are included according to the result of the judgment. The suspicious individual information is transmitted to the monitoring base station.

With the configuration as described above, the portable suspicious individual determination device and the suspicious individual determination method according to the present invention make a risk determination based on a predetermined risk determination criterion depending on the condition of a suspicious individual candidate in the image, and Only when it is determined that there is a risk, there is a warning or image data transmission, so that the data amount is small and the recognition of the risk becomes clear.

It is a figure showing one embodiment of the composition of a portable suspicious person judging device concerning the present invention. It is a figure showing one embodiment of a risk judging standard in a suspicious person judgment of a portable suspicious person judging device and a suspicious person judging method concerning the present invention. It is a figure which shows one Embodiment of the flowchart which shows operation | movement which concerns on the portable suspicious individual determination apparatus and suspicious individual determination method concerning this invention. It is a figure which shows one Embodiment of the numerical value of the risk judgment reference | standard by the suspicious individual judgment condition of the portable suspicious individual judgment apparatus and the suspicious individual judgment method concerning this invention. It is a figure showing the conventional suspicious individual monitoring device.

FIG. 1 is a diagram showing an embodiment of the configuration of the portable suspicious individual determination device according to the present invention.
In 1-A, the mobile suspicious individual determination device 100 is one in which the monitored person 10 to be protected is attached to the body or a hat or clothes worn by the monitored person, and is carried. When the user feels fear or other necessity, it is operated to take an image of the surroundings and determine the risk of the suspicious individual 20, transmit the image to the monitoring base station 200, or perform a risk display or warning. And has the following configuration.
The mobile suspicious person determination device 100 includes a camera 110 that captures an image of the periphery of the monitored person 10 by being activated, a suspicious person determination unit 120 that determines that a suspicious person 20 candidate appearing in the captured image is at risk as a suspicious person, Communication means 130 for transmitting and receiving suspicious person information including an image to external monitoring base station 200 in response to the determination result, identification code 160 (ID) for identifying the individual to be monitored 10, and power supply for supplying power to these 150, and the suspicious person determination means 120 determines from the image whether the suspicious person candidate is hiding his / her face, and whether the approaching direction is from behind, from the front, or from the side. The suspicious person candidate in the image is determined to be a suspicious person having a risk based on the condition determining means 121, a risk determining criterion 122 separately determined based on the determination result, and the risk determining criterion 122. And a risk judgment means 123 to issue the results.
An example of the criterion of the risk criterion 122 will be described with reference to FIG.
In addition, it is convenient to provide a risk display means 140 for notifying the monitored person 10 or the surroundings by sound or light in response to the judgment result. Further, if a positioning means 170 such as gps is provided, the monitored person 10 Is conveniently transmitted to the monitoring base station 200.
In addition, as shown in 1-B and 1-C, the portable suspicious individual determination device 100 can be configured such that the portion including the camera 110 is integrated with or separated from other portions. In the separate configuration, the portion including the camera can be made small, and the other portions can be made large, so that there is an advantage in use. Electrical connection (whether wired or wireless) is made between the separate devices.

FIG. 2 is a diagram showing an embodiment of a risk criterion item in the suspicious person determination of the portable suspicious person determination device and the suspicious person determination method according to the present invention. As an example of the item of the risk judgment criterion 122 judged by the risk judgment means 123, there is a distance L from the monitored person 10 in 2-A. When the candidate of the suspicious person 20 enters the range within the distance L, it is determined that there is a risk. Since the determination is made in the image, for example, the determination can be made based on the size of the candidate for the suspicious person 20 in the image. However, in order to obtain the accuracy, the suspicious person 20 is projected in the candidate direction to give a reference of the distance L from the light spot reflected on the road surface, or to see the distance by reflection of a sound wave or a laser beam from the suspicious person. Means can be taken.
In 2-B, the appearance time t of the candidate of the suspicious individual 20 in the image becomes a risk determination criterion.
For example, if there is an image within 60 minutes (even if there is no image on the way, if there is an image before and after the suspicious person candidate is recognized), it is determined that there is a risk. Since the images are taken at predetermined time intervals, the number of shots is equivalent.
In 2-C, the number of corners of the same street corner as the monitored person 10 is also a risk criterion.
The corner is divided into three branches at an intersection and two branches at a difference road, and there is a high probability of leaving. Nevertheless, for example, as shown in 2-C, when the monitored person 10 turns to the street corner c1, c2, c3, c4, c5, c6, the suspicious person 20 If the candidates seem to be turning in the same way, it is determined that there is a risk even if the distance and time are short. That is why the number of corners is used as a risk criterion . In addition, although there is a road that turns upward as indicated by an arrow in C3, the fact that the vehicle has followed the road straight without turning is also a factor that can be determined to be a risk.

FIG. 3 is a diagram showing one embodiment of a flow chart showing an operation according to the portable suspicious individual determination device and the suspicious individual determination method according to the present invention.
1) The monitored person 10 turns on the portable suspicious individual determination device 100.
2) The portable suspicious individual determination device 100 acquires images around the monitored person 10 at predetermined time intervals using the camera 110. At first, a suspicious person candidate may not be specified, and all persons entering the screen may become suspicious person candidates.
3) A condition judgment is made as to whether the suspicious individual candidate is approaching from the front or side in the image. As a result, the cases are classified into d = 0 (no) and d = 1 (high). This is to make a judgment in the risk judgment. In 4), a condition judgment is made as to whether or not the suspicious individual candidate in the image hides the face. As a result, n = 0 is not hidden, and n = 1 is hidden. An example of a hidden face is one wearing sunglasses and a mask, and more suspicious is one wearing a balaclava. This is to make a judgment in the risk judgment.
Note that responding to a person approaching from the front or from the side is considered to be more likely to commit a crime with less frequent appearance on the screen than tracking from behind. It is. Face hiding is also considered a condition of high suspiciousness.

These condition judgments are made by the condition judgment means 121. Conditional judgment itself is not a risk judgment. In other words, even with the mask on, a risk determination as a suspicious individual is not made, and an image is not transmitted. Since a risk is determined and an image or the like is transmitted to the last, the risk of handling a large amount of data is eliminated.
5) It is determined whether the total time in which the suspicious person candidate appears in the image is equal to or greater than the time reference t, or is equal to or greater than the number C of the turning corners. If both the time t and the number of squares c are equal to or greater than the above, the procedure goes to the next 7). If both are below, go to 6). Note that the reference values for the time t and the number of squares c are determined differently depending on the conditions d and n, and FIG. 4 shows an example thereof. 6) It is determined whether or not the image is within the suspicious person warning area L in the image. If it is outside L, the process returns to 2) image acquisition. Once in L, go to 7).
7) Is another person present between the suspicious person and the monitored person? If there is a person in between, there is a case where it is not a crime. In that case, the process returns to 2) image acquisition. It is preferable to make the photographing time interval smaller than before. If there is no intervener, go to 8). Incidentally, the step 7) can be omitted. In that case, even if there is an intervening person, it is necessary to transmit the information in consideration of the possibility of a crime. The determination as to whether there is an intervener is made by the intermediary determination unit 124 in the suspicious individual determination unit 120.
8) ID (who is the monitored person 10 (correspondence between the ID and the individual is assumed to be made in advance by membership or notification)) and preferably location information, and 9) acquisition information and The image information of the suspicious person is transmitted to the monitoring base station 200 via the communication unit 130. At the same time, it is also possible to send the information to a communication information terminal of a neighbor. At the same time, a warning is issued by the risk display means 140. In some cases, it is possible to give an instruction to the 10 monitored persons, such as changing their walking and going to a direction where a person is present (safe).

In the case of coming from the front or side, there is a case where the suspicious individual is not present, but since the history of the image is reduced, it is convenient to transmit the image once to obtain the effect of suppressing the crime. However, if there is no crime, it is preferable to delete the images (sequentially or collectively) after an appropriate time has elapsed.
Note that deleting an image does not delete all images, but deletes the previous image in time and, as a representative of the final image, the date and time of the image and its history (for example, 2018.6.28 / 15 : 15-15: 35, 2018.7.2 / 15: 20-15: 45, or only the final data) may be left as data, thereby reducing the data amount. Further, when the degree of the suspicious person is high, such as when the image appears many times, the period until the image is erased can be lengthened.

The monitoring base station 200 is linked to performing an action such as moving a security relationship. If there is no danger, 10) turn off the power and end. If no risk judgment is made during the operation, the steps 8) and 9) are not performed, and there is no possibility that the image data amount becomes excessive.
Rather, it is not a good idea to send image data at all times because the probability of a crime is extremely low. In this application, it is realistic that 8) 9) is performed only after risk judgment. preferable.

In addition, even if it is judged as a suspicious person, there is a possibility that it is a suspicious person, it is not exposed to the public, and if it does not become an incident, image data etc. Will be erased. Similarly, audible alerts do not feel good in the normal case where crime does not occur, as those in the vicinity appear to be charged. Sounds that are intended to alert the monitored person (for example, gentle sounds such as “pip, pip, pip, ...”) and loud enough to not overload the neighbors Appropriate.
Suspicious candidates will give up the offense when the warning or transmission is performed. If you are forced to commit a crime, you will be arrested from the image being sent. In addition, since the image is taken, it becomes easy to be a candidate for a suspect, and the chance of arrest increases, so that the deterrence effect is large.
That is, since the surveillance camera moves together with the person to be monitored, it is the same as having a surveillance camera everywhere, and since there is a response only when there is a risk judgment, detailed monitoring without blind spots can be performed.

In addition, an infrared camera is prepared to cover the face, and if the face is not hidden, the image with the visible light camera is obtained.If the face is hidden, the image with the infrared camera is also acquired. It is also preferable to make only an infrared image.
In this way, hiding the face is less effective, and considering that it is a suspicious person by itself, it is thought that hiding the face is reduced. And it is preferable also for dark night correspondence.

FIG. 4 is a diagram showing one embodiment of a numerical value of a risk determination criterion based on a suspicious individual determination condition of the portable suspicious individual determination device and the suspicious individual determination method according to the present invention.
Condition: ○ Hidden face n = 1, not n = 0
○ The approach is front or side d = 1, rear d = 0
By
Risk judgment criterion ◇ time t (set small if condition value is 1): number of times K can be specified ◇ angle c (set small if condition value is 1)
◇ Distance L (set large if condition value is 1)
This is an example in which is defined.
The numerical values are examples, and can be set freely.

The monitored person carries the portable suspicious person determination device, activates the mobile suspicious person determination device whenever necessary when monitoring is necessary, and captures an image of the periphery of the monitored person 10 with the camera provided in the mobile suspicious person determination device. , The characteristics of the suspicious person candidate appearing in the image are acquired as conditions, the risk criterion is determined in advance in consideration of the conditions, and the risk criterion (degree of risk) of the suspicious person is determined based on the risk criterion. By transmitting the image including the ID, the position information, and the suspicious individual candidate to the monitoring base station based on the determination result, it is possible to suppress the crime by the suspicious individual.

As described above, in the portable suspicious individual determination device and the suspicious individual determination method according to the present invention, the monitored person who is the portable person is operated whenever necessary when monitoring is necessary, and the condition presented by the suspicious individual candidate in the image. The risk of the suspicious individual is determined based on the risk criteria set in advance, and actions such as image transmission are performed. It is very convenient to use.

10 Monitored person 20 Suspicious person 20
REFERENCE SIGNS LIST 100 portable suspicious person determination device 110 camera 120 suspicious person determination means 121 condition determination means 122 risk determination criterion 123 risk determination means 130 communication means 140 risk display means 150 power supply 160 ID
170 Positioning means 200 Monitoring base station

Claims (6)

The monitored person is to be carried by attaching to a body or a worn hat or clothing, etc., and is activated when the monitored person feels uneasy or fear of a suspicious candidate or feels a need, Letting the user take an image, determine the risk of the suspicious individual candidate, and, as a result of the determination, perform an action including at least transmission of suspicious individual information to an external monitoring base station,
A camera that captures the image of the periphery of the monitored person by the activation and takes the image, and a suspicious person determination unit that determines whether or not the suspicious person candidate reflected in the captured image is at risk as a suspicious person, Communication means for transmitting at least the suspicious individual information including the image to the monitoring base station in response to the result of the determination that there is the risk; an identification code (ID) for identifying the individual of the monitored person; And a power source for supplying the suspicious person, wherein the suspicious person determining means includes: Condition determining means for determining a difference in conditions for determining from the characteristics of the suspicious individual candidate in the image, wherein the criterion is determined depending on the degree of influence of the conditions on the risk. This Mobile suspicious individual judgment apparatus according to claim. When the suspicious person candidate enters within a predetermined distance from the monitored person, the risk criterion item includes a distance L for determining that there is a risk, and an appearance of the suspicious person candidate in the image. 2. The portable suspicious individual judging device according to claim 1, comprising at least one of a time t and a number c of corners which have turned around the same corner as the monitored person. The item of the condition, whether the suspicious person candidate is approaching the monitored person from the front or side in the image, and whether the suspicious person candidate in the image hides the face, The portable suspicious individual judging device according to claim 1 or 2, wherein at least one of them is included. 4. The suspicious individual judging means has an intervener judging means for judging whether or not another person is an intervening person between the suspicious individual candidate and the monitored person. Portable suspicious individual judging device according to. The camera, besides a visible light camera, includes an infrared camera as a face hiding correspondence when the suspicious person candidate hides a face, and the image of the infrared camera is the infrared image only of the face portion The portable suspicious individual determination device according to any one of claims 1 to 4, characterized in that: The monitored person carries the portable suspicious individual judging device according to any one of claims 1 to 5, and activates the portable suspicious individual judging device at any time when monitoring becomes necessary, The portable suspicious person determination device captures the image of the periphery of the monitored person with the camera, acquires the characteristic presented by the suspicious person candidate reflected in the image as the condition, and considers the condition. A risk judgment criterion is determined in advance, the risk property (degree of risk) of the suspicious person candidate is judged based on the risk judgment criterion, and the identification code (ID) and the image of the suspicious person candidate are included according to the result of the judgment. A suspicious individual determination method, wherein the suspicious individual information is transmitted to the monitoring base station.

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