Lifesaving system

Abstract

To avoid delay of initial motion of lifesaving activity.SOLUTION: The lifesaving system 1 includes an imaging device 105, a detection unit 240, a determination unit 245, a selection unit 250, and a transmission unit 255. The image capturing device 105 generates a captured image of the area PA by capturing an image of the area PA. The detector 240 detects a physical abnormality of the person P0 in the area PA. The determiner 245 determines, for each of the persons P1 to P4 appearing in the captured image, at least one feature of the person on the basis of the captured image. The at least one characteristic includes an appearance characteristic of the person. The selector 250 selects a requested person from among the persons P1 to P4 based on the at least one feature of the persons P1 to P4. A transmission part 255 transmits an instruction INS to the portable communication terminals of the people P0 or the request object persons so as to announce the appearance characteristics of the request object persons and issue a voice for requesting the start of the life-saving activity of the people P0 to the request object persons.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to lifesaving systems. [Background technology]

[0002] Japanese Patent Laid-Open Publication No. 2016-092740 (Patent Document 1) discloses a remote control device. The remote control device includes a communication unit and a control unit. The communication unit receives detection values ​​such as heart rate, pulse rate, respiratory rate, body temperature, and blood pressure obtained by vital sensors attached to multiple subjects. If the detection values ​​received by the communication unit are outside a predetermined range, the control unit transmits a control signal to direct a surveillance camera toward the location of the subject wearing the vital sensor that obtained the detection value outside the predetermined range. The surveillance camera receives the control signal and changes its direction of direction based on the received control signal. As a result, subjects with abnormal detection values ​​enter the surveillance camera's shooting range. The user of the remote control device prioritizes monitoring such subjects. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-092740 Summary of the Invention [Problem to be solved by the invention]

[0004] It is extremely important to be able to immediately begin life-saving measures for a person (a person in need of rescue) who has suddenly lost consciousness or experienced other physical abnormalities. If such an incident occurs within the controlled area of ​​a building such as a commercial facility or office building, those around the person in need of rescue must carry out life-saving measures until an ambulance arrives.

[0005] If there is only one person around the victim, that person may not realize that the victim's condition is serious enough to warrant rescue efforts. If there are many people around the victim, the bystander effect may prevent each person from proactively attempting rescue efforts. This situation can lead to a delay in the initial rescue efforts.

[0006] The present disclosure has been made to solve the above-mentioned problems, and its purpose is to provide a life-saving system that can avoid delays in the initial response of life-saving activities. [Means for solving the problem]

[0007] The life-saving system of the present disclosure includes an imaging unit, a detection unit, a determination unit, a selection unit, and a transmission unit. The imaging unit generates a photographed image of the target area by photographing the target area. The detection unit detects a physical abnormality of a first subject within the target area. The determination unit determines at least one characteristic of at least one person other than the first subject who appears in the photographed image based on the photographed image. The at least one characteristic includes an external characteristic of the person. The selection unit selects a second subject from the at least one person based on the at least one characteristic of the at least one person. The transmission unit transmits a command to a mobile communication device of the first subject or the second subject to notify the external characteristic of the second subject and to emit a voice requesting the second subject to begin life-saving activities for the first subject. [Effects of the Invention]

[0008] According to the present disclosure, a mobile communication terminal device emits a voice message informing the second subject of the external characteristics of the second subject and requesting the second subject to begin lifesaving activities for the first subject (person in need of rescue) in whom a physical abnormality has been detected. This allows the second subject to easily recognize that he or she has been requested to begin lifesaving activities (that he or she has been identified as a rescuer), and motivates the second subject to immediately begin lifesaving activities as a rescuer. As a result, lifesaving activities can be started immediately. Therefore, delays in the initial response to lifesaving activities can be avoided. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram schematically showing a hardware configuration of a lifesaving system according to an embodiment. [Figure 2] FIG. 2 is a diagram illustrating an example of the structure of an employee DB (Database). [Figure 3] FIG. 1 is a diagram illustrating an aspect of an embodiment. [Figure 4] FIG. 10 is a diagram illustrating another aspect of the embodiment. [Figure 5] FIG. 2 is a block diagram showing a functional configuration of the lifesaving system according to the embodiment. [Figure 6] FIG. 10 is a diagram illustrating an example of priority information. [Figure 7] 10 is a flowchart illustrating an example of a process executed by a server in the embodiment. [Figure 8] FIG. 10 is a block diagram showing a functional configuration of a lifesaving system according to a first modified example. [Figure 9] FIG. 10 is a diagram illustrating an example of score information. [Figure 10] FIG. 11 is a block diagram showing a functional configuration of a lifesaving system according to a third modification. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The same or corresponding parts in the drawings will be denoted by the same reference numerals, and the description thereof will not be repeated. The embodiments and their modifications may be combined with each other as appropriate.

[0011] 1 is a diagram schematically illustrating a hardware configuration of a lifesaving system according to an embodiment. Referring to FIG. 1, the lifesaving system 1 includes a plurality of cameras 10 and a server 20.

[0012] The multiple cameras 10 include cameras 10A, 10B, 10C, etc. Each camera 10 is a network camera installed in a building to be managed, such as a commercial facility or an office building. Hereinafter, this building will also be referred to as the "target building." Each camera 10 includes an imaging device (imaging unit) 105 and a communication device 110.

[0013] The image capturing device 105 captures an area of ​​the target corresponding to the installation position of the camera 10. Hereinafter, this area will also be referred to as the "target area." The image capturing device 105 captures an image of the corresponding target area by capturing an image of the area. For example, the target area of ​​the camera 10A is area PA. The image capturing device 105 functions as a surveillance camera installed in the target building.

[0014] The communication device 110 can communicate with mobile communication terminals in the target area or in a nearby area via short-range communication. A short-range communication method is, for example, Bluetooth (registered trademark). The communication device 110 also communicates with the server 20. For example, the communication device 110 transmits a captured image generated by the image capturing device 105 to the server 20.

[0015] The server 20 is provided to monitor the status of the target building, and includes a communication device 202 , a storage device 205 , and a processing device 215 .

[0016] The communication device 202 is configured to communicate with each camera 10 via wired or wireless communication. The communication device 202 receives captured images from each camera 10, for example.

[0017] The storage device 205 stores an employee DB 206, a captured image DB 207, and priority information 209. The employee DB 206 represents various types of pre-registered information about employees (for example, security guards, store clerks, or cleaners) working in the target building.

[0018] FIG. 2 is a diagram illustrating an example of the structure of employee DB 206. Referring to FIG. 2, employee DB 206 includes employee number information 206A, facial photo information 206B, and terminal number information 206C. Employee number information 206A represents an identification number (employee number) for identifying each employee. Facial photo information 206B represents a facial photo of each employee. Each facial photo is associated with a corresponding employee number. Terminal number information 206C represents the identification number (business terminal number) of each employee's business mobile communication terminal. Each of these terminals is configured to be capable of short-range communication with camera 10. Each business terminal number is associated with a corresponding employee number.

[0019] 1, the captured image DB 207 includes a set of captured images transmitted from each camera 10 and received by the communication device 202. The captured image DB 207 is updated sequentially as each captured image is received. The priority information 209 will be described in detail later.

[0020] The processing device 215 includes a memory and a CPU (Central Processing Unit) (neither is shown). The memory includes a ROM (Read Only Memory) and a RAM (Random Access Memory). The ROM stores various programs (e.g., programs for image processing). The RAM functions as a working memory. The CPU executes various arithmetic processes in accordance with the programs.

[0021] 3 is a diagram illustrating one aspect of the embodiment. Referring to FIG. 3, in this aspect, people P0 to P4 are in an area PA. As a result, all of people P0 to P4 appear in the image captured by camera 10A. People P1 to P4 are located around person P0 in area PA. Person P1 is an employee (e.g., a man) working in the target building, and is carrying a mobile communication terminal 25 for business use.

[0022] The mobile communication terminal 25 includes a communication device 26 and a speaker 27. The communication device 26 communicates with the communication device 110 of the camera 10 by short-range communication. The speaker 27 is configured to emit sound.

[0023] A person P0 is wearing a wearable communication terminal 30 and carrying a smartphone 35.

[0024] The wearable communication terminal 30 is an example of a portable communication terminal for the person P0, such as a smart watch. The wearable communication terminal 30 includes a biosensor 31, a communication device 32, and a speaker 33. The biosensor 31 detects biometric information of the person P0. The biometric information includes index values ​​(e.g., pulse rate or heart rate) that represent the health condition of the person P0. The communication device 32 communicates with the communication device 110 of a camera 10 (in this example, camera 10A) near the person P0 via short-range communication. The communication device 32 sequentially transmits a signal S0 to the camera 10A. The signal S0 includes the biometric information and identification information of the wearable communication terminal 30. The speaker 33 is configured to emit sound.

[0025] The smartphone 35 is an example of a mobile communication terminal for the person P0, and includes a communication device 36 and a speaker 37. The communication device 36 communicates with the communication device 110 of the camera 10 via short-range communication. The communication device 36 is paired with the wearable communication terminal 30 via short-range communication, and transmits identification information unique to the smartphone 35 to the wearable communication terminal 30. The wearable communication terminal 30 transmits the identification information of the smartphone 35 included in a signal S0 to the camera 10. The speaker 37 functions as an audio output device.

[0026] FIG. 4 is a diagram illustrating another aspect of the embodiment. Referring to FIG. 4, in this example, it is assumed that a person P0 has suffered a sudden physical abnormality, such as loss of consciousness, and collapsed, requiring rescue. In this case, it is extremely important to immediately begin life-saving efforts (e.g., cardiopulmonary resuscitation) for the person P0. If such an incident occurs within the controlled area of ​​the target building, it is necessary for people around the person P0 (e.g., any of the persons P1 to P4) to carry out life-saving efforts until an ambulance arrives.

[0027] If there is only one person around person P0, that person may not realize that person P0's condition is serious enough to warrant life-saving efforts. Alternatively, if there are many people (people P1 to P4) around person P0, as in the example in Figure 4, each person may expect someone else to properly perform life-saving efforts, or may do nothing to avoid being negatively evaluated by others if their efforts fail (the bystander effect). As a result, each person may not be willing to initiate life-saving efforts. This situation could lead to a delay in the initial response of life-saving efforts.

[0028] Therefore, the lifesaving system 1 according to the embodiment has a configuration for dealing with the above-mentioned problems, which will be described in detail below.

[0029] Fig. 5 is a block diagram showing a functional configuration of lifesaving system 1 according to an embodiment. Referring to Fig. 5, camera 10A receives signal S0 from wearable communication terminal 30, generates signal S1 by including information indicating a captured image of area PA in signal S0, and transmits the signal S1 to server 20. That is, signal S1 includes information included in signal S0 (e.g., biometric information of person P0 and identification information of wearable communication terminal 30 and smartphone 35) and information indicating the captured image of area PA.

[0030] The server 20 includes, as its functional configuration, a detection unit 240, a determination unit 245, a selection unit 250, and a transmission unit 255. The functions of the detection unit 240 and the transmission unit 255 are performed when the communication device 210 and the processing device 215 operate in cooperation with each other. The functions of the determination unit 245 and the selection unit 250 are performed by the processing device 215.

[0031] The detector 240 detects a physical abnormality of the person P0 based on the biological information included in the signal S1. For example, the detector 240 detects a physical abnormality of the person P1 when an index value such as a heart rate or pulse rate falls below a predetermined threshold. This threshold is stored in the storage device 205.

[0032] The determination unit 245 determines at least one characteristic of each of at least one person other than person P0 (in this example, persons P1 to P4) appearing in the captured image based on the captured image. The at least one characteristic includes the person's appearance characteristics. The appearance characteristics include (1) whether the person is wearing an employee uniform of the management company of the target building, (2) whether the person is an adult, (3) the person's gender, and (4) whether the person is wearing the same clothes as another person appearing in the captured image. The above (1) is determined based on whether the color and shape of the person's clothes match the color and shape of a pre-registered employee uniform. An employee uniform may be defined as clothing that appears a predetermined number of times or more in captured images in the captured image DB 207. The above (2) is determined based, for example, on whether the person's physique is larger than a predetermined size. The above (2) may be determined based on whether the person's age, estimated using image processing technology based on the shape of the person's face (e.g., the positional relationship between the eyes, nose, and mouth), is at least a predetermined age (e.g., 18 years old). All of the above (1) to (4) are determined using image processing technology. The at least one feature may further include a feature related to the person's movement, such as whether the time the person appears in the captured image (hereinafter also referred to as "capture time") is longer than a reference time. The capture time corresponds to the time the person remains in the area PA.

[0033] The selection unit 250 selects a request target person to whom life-saving activities for person P0 are requested from among the at least one person, based on the at least one characteristic of the at least one person (all of the characteristics of each person other than person P0). In this example, the selection unit 250 selects a request target person from among persons P1 to P4 based on the at least one characteristic of each of persons P1 to P4 determined as described above. A specific method for selecting a request target person will be described in detail later.

[0034] The transmitting unit 255 transmits the command INS to the smartphone 35 via the communication device 110 so as to emit a voice that notifies the request target of the external characteristics of the request target and requests the request target to begin life-saving activities for the person P0. Hereinafter, this voice will also be referred to as a "life-saving request voice." Based on the identification information of the smartphone 35 included in the signal S1, the transmitting unit 255 recognizes that the destination of the command INS is the smartphone 35, and transmits the command INS to the smartphone 35.

[0035] With this configuration, the smartphone 35 receives the command INS, and the voice message requesting rescue is emitted from the speaker 37 of the smartphone 35. This allows the requestee to easily recognize that he or she has been requested to start rescue activities (that is, that he or she has been identified as a rescuer), and motivates the requestee to immediately start rescue activities as a rescuer. As a result, rescue activities can be started immediately. This makes it possible to avoid delays in the initial rescue activities due to the bystander effect, etc.

[0036] The transmitter 255 may transmit the command INS to the wearable communication terminal 30 instead of the smartphone 35, based on the identification information of the wearable communication terminal 30 included in the signal S1. In this case, the voice requesting lifesaving is also emitted from the speaker 33 of the wearable communication terminal 30. As a result, it is possible to motivate the request recipient to immediately begin lifesaving efforts. Note that the transmitter 255 may transmit the command INS to the mobile communication terminal 25 of the person P1 instead of the mobile communication terminal of the person P0, such as the smartphone 35 or the wearable communication terminal 30. This point will be explained in detail later.

[0037] Fig. 6 is a diagram illustrating an example of priority information 209. Referring to Fig. 6, priority information 209 is used by selection unit 250 to select a request recipient from among persons P1 to P4. Priority information 209 represents a predetermined correspondence between at least one characteristic determined by determination unit 245 and the priority of selecting a person having the characteristic as a request recipient (lifesaver). A person having a characteristic corresponding to a higher priority is more suitable to be a lifesaver and is therefore more likely to be selected as a request recipient.

[0038] As will be explained below, for each of the persons P1 to P4, it is determined whether or not the person has the following characteristic (i), (ii), (iii) or (iv).

[0039] For example, for each of the persons P1 to P4, whether or not the person has characteristic (i) that indicates that the person is an employee of the target building is determined based on the captured image. This determination process is performed based on whether or not the person has the aforementioned external characteristic (1). Whether or not the person has characteristic (i) may be determined using image processing technology based on whether or not the person's face matches or is similar to a face registered in the facial photo information 206B of the employee DB 206. A person who has characteristic (i) is considered to be the most suitable rescuer and is assigned the highest priority. This is because such a person is likely to be familiar with the route from the location where person P0 collapsed (area PA) to the location where the ambulance will arrive (e.g., the parking lot within the target building).

[0040] If it is determined that the person does not have characteristic (i), it is then determined whether the person has characteristic (ii) of being an adult. This determination process is performed according to whether the person has the external characteristic (2) described above. A person who has characteristic (ii) is deemed suitable to be a rescuer and is assigned the second highest priority. This is because adults generally have greater physical strength than children and can more appropriately perform life-saving activities such as cardiopulmonary resuscitation.

[0041] If it is determined that the person does not have the characteristic (ii), it is then determined whether or not the person has the characteristic (iii), that is, the time that the person appears in the photographed image (photographing time) is equal to or longer than a reference time. A person who has the characteristic (iii) is deemed suitable for rescue and is assigned the third highest priority. This is because, in general, a person who has a short photographing time is a passerby who is passing through the area PA immediately and is likely not to remain in the area PA because he or she has some business to attend to, whereas a person who has a long photographing time is likely to remain in the area PA for a relatively long time and have some free time.

[0042] If the person is determined not to have characteristic (iii), it is then determined whether the person has characteristic (iv), i.e., wearing the same clothes as another person appearing in the photograph. This determination process is performed based on whether the person has the aforementioned external characteristic (4). A person having characteristic (iv) is deemed suitable as a rescuer and is assigned the fourth highest priority. This is because people wearing the same clothes are likely to belong to the same community (e.g., a group) and be active in a group. If one of such people is identified as a rescuer, other members of the same community as the identified person are likely to cooperate in the rescue operation, ensuring smooth execution of the rescue operation. Feature (iv) corresponds to the aforementioned external characteristic (4).

[0043] The above order of priority is merely an example. For example, the priority corresponding to the characteristic (iii) may be set higher than the priority corresponding to the characteristic (ii). It may also be determined whether or not each of the persons P1 to P4 has other characteristics in addition to or instead of the characteristics (i) to (iv).

[0044] The selection unit 250 selects, as the request recipient, the person having the characteristic corresponding to the highest priority from among the people P1 to P4. In this example, it is assumed that, of the people P1 to P4, only the person P1 has characteristic (i), and the person P1 has the highest priority among the people P1 to P4. In this case, the selection unit 250 selects the person P1 as the request recipient. If there are multiple people each having the highest priority, the selection unit 250 may randomly select a request recipient from among these people.

[0045] As described above, in the embodiment, the request recipient is selected using the priority information 209. This allows a person having characteristics predetermined as characteristics optimal for lifesaving activities to be easily selected as the request recipient. This motivates the person most suited to lifesaving activities to start lifesaving activities. As a result, lifesaving activities can be started more appropriately.

[0046] Returning to FIG. 5, as described above, the transmitting unit 255 transmits a command INS to the mobile communication terminal (wearable communication terminal 30 or smartphone 35) of person P0. The advantages of such transmission processing will be described below. The above-described mobile communication terminals generally sequentially record their operation history as a log in their memory. In the above example, a voice message requesting rescue is emitted from the mobile communication terminal of person P0. This makes it possible to request the requestee to begin rescue activities while avoiding a situation in which the history of information indicating that person P0 has become physically abnormal and that rescue activities have been requested is recorded on a mobile communication terminal other than person P0 (e.g., mobile communication terminal 25). As a result, the privacy of person P0 can be appropriately protected. In addition, even if none of persons P1 to P4 is carrying a mobile communication terminal, the requestee can easily recognize that they have been requested to begin rescue activities.

[0047] The transmitting unit 255 may transmit the command INS to the mobile communication terminal of the request target person instead of the mobile communication terminal of the person P0. For example, if the request target person is person P1, the transmitting unit 255 may transmit the command INS to mobile communication terminal 25 via the communication device 110. In this case, the determining unit 245 determines that person P1 is an employee based on the face of person P1 appearing in the captured image and facial photo information 206B in employee DB 206. The selecting unit 250 selects person P1 as the request target person based on the fact that person P1 is an employee and has the highest priority. Then, the transmitting unit 255 recognizes the business terminal number (the identification number of mobile communication terminal 25) corresponding to the employee number of person P1 based on the terminal number information 206C in employee DB 206, and based on the recognized number, recognizes that the destination of the command INS is mobile communication terminal 25 and transmits the command INS to mobile communication terminal 25.

[0048] By transmitting the command INS to the mobile communication terminal 25 as described above, a voice requesting rescue is emitted from the mobile communication terminal 25. The mobile communication terminal 25 is closer to the request recipient (person P1) than the mobile communication terminal (wearable communication terminal 30 or smartphone 35) of person P0. Therefore, person P1 is more likely to notice the voice requesting rescue than if the voice requesting rescue were emitted from the mobile communication terminal of person P0. As a result, person P1 can more easily recognize that he or she has been requested to begin rescue activities.

[0049] 7 is a flowchart showing an example of processing executed by the server 20 in the embodiment. This flowchart is started when an index value, such as heart rate, indicated by the biological information included in the signal S1 drops below a reference value. In this example, it is also assumed that persons P1 to P4 are around person P0 within area PA, and person P0 has developed a physical abnormality. Hereinafter, step will be abbreviated as "S."

[0050] Referring to FIG. 7, the server 20 detects a physical abnormality of the person P0 based on the biometric information of the person P0 (S105).

[0051] The server 20 determines at least one characteristic of each of the people P1 to P4 around the person P0 who is a person in need of rescue, based on the captured image (S110). The at least one characteristic includes, for example, one or more of the above-mentioned characteristics (i) to (iv).

[0052] The server 20 selects a request recipient from among the people P1 to P4 based on the determined characteristics of the people P1 to P4 (S115). The server 20 selects, for example, the person with the highest priority as the request recipient.

[0053] The server 20 transmits a command INS to the mobile communication terminal (for example, the wearable communication terminal 30 or the smartphone 35) of the rescuer to issue a voice request for rescue (S120). The server 20 may transmit the command INS to the mobile communication terminal 25. After S120, the process ends.

[0054] As described above, according to the embodiment, when the server 20 detects a physical abnormality in the person P0, it selects a request recipient from among the people P1 to P4 and transmits a command INS to the mobile communication terminal (wearable communication terminal 30 or smartphone 35) of the person P0 or the mobile communication terminal 25 of the request recipient to issue a voice message requesting rescue. This allows the request recipient to easily recognize that they have been requested to begin lifesaving efforts, and motivates them as a lifesaver to immediately begin lifesaving efforts. As a result, lifesaving efforts can be initiated immediately. This makes it possible to avoid delays in the initial response to lifesaving efforts due to the bystander effect, etc.

[0055] <First Modification of the Embodiment> In the embodiment, the selection unit 250 selects a request target person using priority information 209 (FIG. 6), but in this modification 1, the selection unit 250 selects a request target person using a different method. This point will be explained below.

[0056] Fig. 8 is a block diagram showing a functional configuration of a lifesaving system according to Modification 1. Referring to Fig. 8, the lifesaving system 1A is different from the lifesaving system 1 of the embodiment (Fig. 5) in that it further includes a calculation unit 247 and the storage device 205 stores score information 280 instead of the priority information 209.

[0057] Fig. 9 is a diagram illustrating an example of score information 280. Referring to Fig. 9, score information 280 is used to select a request recipient from among persons P1 to P4. Score information 280 represents a predetermined correspondence between at least one characteristic determined by determination unit 245 and a score assigned to a person having the characteristic. The score relates to suitability as a lifesaver, and specifically, a person having a characteristic corresponding to a higher score tends to be more suited to being a lifesaver.

[0058] For example, for each of persons P1 to P4, it is determined whether or not the person has characteristic (i) based on the captured image. If it is determined that the person has characteristic (i), a score of x1 is assigned to the person, and if not, a score of 0 is assigned to the person.

[0059] For each of persons P1 to P4, it is determined whether or not the person has characteristic (ii) based on the captured image. If the person is determined to have characteristic (ii), the person is assigned a score of x2, and if not, a score of 0 is assigned.

[0060] For each of persons P1 to P4, it is determined whether or not that person has characteristic (iii) based on the captured image. If it is determined that that person has characteristic (iii), that person is assigned a score of x3, and if not, a score of 0 is assigned.

[0061] For each of persons P1 to P4, it is determined whether or not the person has characteristic (iv) based on the captured image. If the person is determined to have characteristic (iv), a score of x4 is assigned to the person, and if not, a score of 0 is assigned. In this example, x1>x2>x3>x4, but each score can be set appropriately.

[0062] The function of the calculation unit 247 (FIG. 8) will be described below. This function is performed by the processing device 215. The calculation unit 247 calculates a total score (y) for each of the persons P1 to P4, which is the sum of the scores (xi) assigned to that person. Specifically, the calculation unit 247 calculates the total score by weighting each score (xi) using a coefficient ci according to the calculation formula y=Σci·xi (i=1, 2, ...). The coefficient ci reflects the result of the determination by the determination unit 245, and specifically, is set to 1 if the person has the corresponding feature, and is set to 0 if the person does not have the feature. For example, if a person has only features (i) to (iii) out of features (i) to (iv), then c1, c2, and c3 are each 1, and c4 is 0 (y=1·x1+1·x2+1·x3+0·x4=x1+x2+x3). The calculation unit 247 calculates a total score for at least one characteristic for each of the persons P1 to P4 by adding up the scores of the characteristic for at least one characteristic that is determined to be possessed by the person.

[0063] The selection unit 250 selects a request recipient based on the total score of each of the people P1 to P4. For example, the selection unit 250 selects the person with the highest total score among the people P1 to P4 as the request recipient. In this example, it is assumed that the person P1 has characteristics (i) to (iii) and has the highest total score among the people P1 to P4. As a result, the person P1 is selected as the request recipient.

[0064] Since each score relates to suitability as a person to be requested, a person with a higher total score is more suitable to be requested. As described above, if a person with the highest total score is selected as a person to be requested, the person who is most suitable for life-saving activities from an overall perspective is motivated to start life-saving activities. As a result, life-saving activities can be started more appropriately.

[0065] <Modification 2 of the embodiment> In the embodiment, the detection unit 240 detects a physical abnormality of the person P0 based on the biometric information included in the signal S1, but in this modification 2, the detection unit 240 may detect a physical abnormality of the person P0 based on a captured image instead of the biometric information. For example, the detection unit 240 may detect a change in the posture of the person P0 in the area PA (e.g., collapsing) based on the captured image, and thereby detect a physical abnormality. The processing after detecting a physical abnormality is the same as in the embodiment or modification 1.

[0066] With this configuration, even if the person P0 is not wearing the wearable communication terminal 30, a physical abnormality in the person P0 can be detected and the person to whom the request is made can be appropriately requested to begin life-saving activities.

[0067] <Modification 3 of the embodiment> In the embodiment, the server 20 performs the function of the detection unit 240, but in this variant example 3, the mobile communication terminal (e.g., wearable communication terminal 30) of the person P0 who is the person in need of rescue may perform the function.

[0068] Fig. 10 is a block diagram showing the functional configuration of a lifesaving system according to Modification 3. Referring to Fig. 10, lifesaving system 1B differs from lifesaving system 1 of the embodiment (Fig. 5) or lifesaving system 1A of Modification 1 (Fig. 8) in that the wearable communication terminal 30 includes the function of a detection unit 240 instead of the server 20. In other respects, lifesaving system 1B is basically the same as lifesaving system 1 (1A) unless otherwise noted. Therefore, detailed description will not be repeated.

[0069] The wearable communication terminal 30 detects a physical abnormality in the person P0 when an index value such as the heart rate drops below a threshold value. The wearable communication terminal 30 then further includes a life-saving request from the person P0 in the signal S0 and transmits this signal to the camera 10 as a life-saving request signal. The camera 10 generates a signal S1 based on this signal and transmits it to the server 20. The signal S1 includes the above-mentioned life-saving request, a captured image, and identification information for the wearable communication terminal 30 and the smartphone 35. The determination unit 245 determines at least one characteristic of at least one person other than the person P0 who appears in the captured image based on the captured image. The subsequent processing is the same as that in the embodiment or the first modification.

[0070] In this way, the function of the detection unit 240 may be performed by a mobile communication terminal of the rescue recipient, such as the wearable communication terminal 30. In this case, the function of the detection unit 240 is performed by the cooperation of the biosensor and CPU of the terminal.

[0071] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0072] 1, 1A, 1B Lifesaving system, 10, 10A, 10B, 10C Camera, 20 Server, 25 Mobile communication terminal, 26, 32, 36, 110, 202, 210 Communication device, 27, 33, 37 Speaker, 30 Wearable communication terminal, 31 Biometric sensor, 35 Smartphone, 105 Imaging device, 205 Storage device, 215 Processing device, 240 Detection unit, 245 Determination unit, 247 Calculation unit, 250 Selection unit, 255 Transmission unit.

Claims

1. an imaging unit that captures an image of a target area to generate a captured image of the target area; a detection unit that detects a physical abnormality of a first subject within the target area; a determination unit that determines, for each of at least one person other than the first subject who appears in the captured image, at least one feature of the person based on the captured image, wherein the at least one feature includes an appearance feature of the person; and a selection unit that selects a second subject from the at least one person based on the at least one characteristic of the at least one person; A life-saving system comprising: a transmitting unit that transmits an instruction to a mobile communication terminal of the first subject or the second subject to notify the second subject of the external characteristics of the second subject and to emit a voice requesting the second subject to begin life-saving activities for the first subject.

2. the detection unit detects the physical abnormality based on biological information of the first subject detected by a wearable communication terminal worn by the first subject; The life-saving system according to claim 1 , wherein the transmitting unit transmits the command to the mobile communication terminal of the first subject based on identification information of the mobile communication terminal of the first subject transmitted from the wearable communication terminal.

3. The life-saving system of claim 2, wherein the transmitting unit transmits the command to an audio output device paired with the wearable communication terminal as the mobile communication terminal of the first subject, or to the wearable communication terminal as the mobile communication terminal of the first subject.

4. The lifesaving system according to claim 1 , wherein the detection unit detects the physical abnormality based on the captured image.

5. a storage unit that stores a predetermined correspondence between each of the at least one characteristic and a score related to aptitude as the second subject that is assigned to a person having the characteristic; a calculation unit that calculates a total score, which is the sum of the scores of the at least one characteristic, for each of the at least one person; The life-saving system according to claim 1 , wherein the selection unit selects, as the second subject, a person having the highest total score from the at least one subject.

6. a storage unit configured to store a predetermined correspondence between each of the at least one characteristic and a priority of selecting a person having the characteristic as the second subject; The life-saving system according to claim 1 , wherein the selection unit selects, as the second target person, a person having a characteristic corresponding to the highest priority from among the at least one person.

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