Intruder detection device, intruder detection method, and intruder detection program

Abstract

To provide an intruder detection device capable of effectively detecting an intruder with a simple structure, and to provide an intruder detection method and an intruder detection program.SOLUTION: An intruder detection device 1 includes: a transmission control unit 11 which transmits high frequency sound to a monitoring object space; a sound collection control unit 12 which acquires sound in the monitoring object space; a sound analysis unit 21 which analyzes the sound collected by the sound collection control unit to detect an intruder into the monitoring object space; and a notification control unit 25 which notifies a user of the intruder being detected.SELECTED DRAWING: Figure 1

Description

Technical Field

[0006] , , ,

[0005] ,

[0007] , ,

[0001] The present invention relates to an intruder detection device, an intruder detection method, and an intruder detection program.

Background Art

[0002] Patent Document 1 discloses a vehicle intrusion detection device that continuously detects the intrusion of an object into the vehicle interior.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the invention described in Patent Document 1, the moving distance of an object is calculated from the reflected wave of a transmitted ultrasonic pulse to detect an intrusion. However, in this configuration, a device for transmitting and receiving ultrasonic waves is required, which is complicated.

[0005] In view of such circumstances, the present invention has been made, and an object thereof is to provide an intruder detection device, an intruder detection method, and an intruder detection program that can detect an intruder with a simple configuration.

Means for Solving the Problems

[0006] In order to solve the above problems, an intruder detection device according to the present invention includes, for example, a transmission control unit that transmits high-frequency sound to a monitoring target space, a sound collection control unit that acquires sound in the monitoring target space, a sound analysis unit that analyzes the sound collected by the sound collection control unit to detect an intruder into the monitoring target space, and a notification control unit that notifies that the intruder has been detected. [[ID=四十八]]

[0007] Another aspect of the present invention relates to an intruder detection method, for example, a method for detecting an intruder into a monitored space, characterized by comprising the steps of: transmitting a high-frequency sound into the monitored space; acquiring sound in the monitored space; detecting the intruder into the monitored space by analyzing the acquired sound; and notifying that the intruder has been detected.

[0008] Another aspect of the intruder detection program of the present invention is characterized in that a computer functions as, for example, a transmission control unit that transmits high-frequency sound into a monitored space, a sound acquisition control unit that acquires sound in the monitored space, a sound analysis unit that detects an intruder into the monitored space by analyzing the sound acquired by the sound acquisition control unit, and a notification control unit that notifies that an intruder has been detected. Computer programs can be provided via download over networks such as the Internet, or by being recorded on various computer-readable recording media such as CD-ROMs.

[0009] In any of the above embodiments of the present invention, since intruders are detected using sound, existing equipment can be reused to detect intruders in the monitored space with a simple configuration. Furthermore, since there is no need to install special equipment, intruders can be detected without arousing suspicion.

[0010] The system further comprises an imaging control unit that acquires an image of the monitored space, an image analysis unit that analyzes the image acquired by the imaging control unit, and an age estimation unit that estimates the age of the intruder based on the analysis results of the image. The transmission control unit emits sounds of different frequencies that are audible or inaudible depending on age, the image analysis unit determines whether the intruder in the monitored space has reacted to the sound, and the age estimation unit estimates the age of the intruder based on the frequency of the sound emitted by the transmission control unit and the determination result of the image analysis unit. Since the upper limit of human audible frequencies gradually decreases with age, the age of the intruder can be estimated based on the frequency of the sound to which the intruder reacted. Furthermore, even if the intruder's face cannot be sufficiently recognized from the image due to insufficient illumination, problems with the camera's shooting angle, or the intruder hiding their face, the age of the intruder can still be estimated.

[0011] The system further includes a frequency setting unit for setting the frequency of the sound emitted by the transmission control unit. The frequency setting unit may lower the frequency of the sound emitted by the transmission control unit if the image analysis unit determines that the intruder is not reacting to the sound. This allows the system to estimate the age of the intruder across a wide age range.

[0012] If the image analysis unit can extract the intruder's face from the captured image, it may extract the face from the captured image, and the age estimation unit may estimate the intruder's age based on the extracted face image. This makes it possible to estimate the intruder's age using the face image obtained from the image. [Effects of the Invention]

[0013] According to the present invention, intruders can be detected with a simple configuration. [Brief explanation of the drawing]

[0014] [Figure 1] This is a functional block diagram showing the schematic electrical configuration of the intruder detection device 1 according to the first embodiment. [Figure 2]This flowchart shows an example of the process flow when intruder detection device 1 detects an intruder. [Figure 3] This flowchart shows an example of the processing flow of the intruder detection device 1 in alert mode. [Figure 4] This flowchart shows an example of the process for estimating age using sound. [Modes for carrying out the invention]

[0015] Hereinafter, embodiments of the intruder detection device 1 according to the present invention will be described in detail with reference to the drawings. The intruder detection device 1 is a device that detects an intruder who has entered a predetermined monitored space. The monitored space is, for example, the interior of a vehicle.

[0016] Figure 1 is a functional block diagram showing the schematic electrical configuration of an intruder detection device 1 according to the first embodiment and an alarm device 2 connected to the intruder detection device 1. The intruder detection device 1 is connected by wire or wireless to a monitoring device 50 installed in the monitored space, and monitors the monitored space by controlling the monitoring device 50.

[0017] The monitoring device 50 includes, for example, a speaker 51, a microphone 52, and an imaging unit 53. The speaker 51 should preferably be capable of emitting high-frequency sounds of at least 20 kHz or higher, which are above the audible range. The microphone 52 is capable of picking up sounds in the frequency range intentionally emitted from the speaker 51. The imaging unit 53 may be a visible light camera or an infrared camera.

[0018] Some or all of the monitoring device 50 is pre-installed in the space to be monitored. If the space to be monitored is a vehicle interior, various on-board devices can be used as the monitoring device 50. This configuration requires fewer devices to be prepared for intruder detection, making it simple. Furthermore, because it appears to be a standard device configuration, it does not arouse suspicion and allows for more reliable detection of intruders.

[0019] Note that the intruder detection device 1 only needs to be able to control the monitoring device 50, and it may be provided inside or near the monitored space, or may be provided at a position away from the monitored space. The intruder detection device 1 may be a so-called server. Further, the intruder detection device 1 may be realized by, for example, one or a plurality of hardware configurations, or may be configured by cloud computing. Further, the intruder detection device 1 and the monitoring device 50 may constitute an intruder detection system.

[0020] The intruder detection device 1 is connected to the notification device 2 by wire or wirelessly. The intruder detection device 1 notifies an alarm regarding an intruder via the notification device 2. The intruder detection device 1 and the notification device 2 may be connected via a network. The notification device 2 includes an appropriate device for warning a user who uses the intruder detection device 1, such as a display device such as a display, a speaker, a lamp that notifies by sounding, etc. The user is, for example, the owner of a vehicle in which the monitored space is defined inside. The notification device 2 may be an information terminal owned by a user outside the vehicle, such as a smartphone or a tablet terminal. The notification device 2 may be a device confirmed by a security company, an administrator, etc. Further, the notification device 2 may be connected to the Internet and be capable of transmitting a Web mail that reaches an external device via an Internet line.

[0021] The intruder detection device 1 mainly includes a detection control unit 10, an analysis control unit 20, and a storage unit 30.

[0022] The detection control unit 10 is a functional unit that detects an intruder in the monitored space. The detection control unit 10, for example, starts operating契机 when the door of the monitored space (for example, the vehicle cabin) is locked from the outside. According to this configuration, since the operation is automatically started, detection can be surely performed without forgetting to set it. Further, the operation may be stopped when the door lock is released. According to this configuration, there is little possibility of misdetecting the user.

[0023] The detection control unit 10 mainly includes a transmission control unit 11, a sound collection control unit 12, and an image capture control unit 13.

[0024] The transmission control unit 11 is a functional unit that transmits high-frequency sound into the monitored space via the speaker 51. For example, the transmission control unit 11 transmits high-frequency sound via the speaker 51. High-frequency sound is, for example, sound with a frequency of about 10kHz to 32kHz, and is airborne sound in the higher frequency band of the so-called audible range (frequency band that humans can potentially hear).

[0025] The transmission control unit 11 transmits multiple types of warning sounds composed of different frequencies via the speaker 51. For example, the sounds transmitted by the transmission control unit 11 via the speaker 51 may be mosquito tones of different frequencies (for example, around 17kHz to 20kHz). Note that the audibility of mosquito tones varies depending on age.

[0026] Furthermore, the transmission control unit 11 transmits a warning sound containing a message to the intruder via the speaker 51. The transmission control unit 11 can also transmit a warning sound consisting of, for example, a sound with a lower frequency range than a mosquito tone.

[0027] The sound collection control unit 12 is a functional unit that acquires sound from the monitored space collected via the microphone 52. The microphone 52 collects reflected sound from objects and people inside the vehicle when sound from the speaker 51 is reflected off them, and the sound collection control unit 12 acquires this reflected sound. With this configuration, the sound analysis unit 21, described later, can acquire changes in people and objects in the monitored space based on changes in the reflected sound. The sound frequency used for intruder detection is, for example, close to the upper limit of the human audible frequency range, or higher than the audible frequency range. This makes it possible to detect intrusion without the intruder noticing. The sound collection control unit 12 may store the data collected via the microphone 52 in the storage unit 30 of the intruder detection device 1.

[0028] Furthermore, the transmission control unit 11 and the sound collection control unit 12 may operate at regular intervals while the detection control unit 10 is operating. This configuration allows for lower power consumption compared to a configuration in which they operate continuously.

[0029] The imaging control unit 13 is a functional unit that controls the imaging unit 53 to acquire images of the monitored space. The imaging control unit 13 acquires at least images of the interior of the vehicle. The imaging control unit 13 may also acquire images of the monitored space via the imaging unit 53 and store them in the storage unit 30. Note that the term "image" includes both still images and moving images.

[0030] The analysis control unit 20 is a functional unit that analyzes the data collected by the detection control unit 10. The analysis control unit 20 has a computing device such as a CPU (Central Processing Unit) for executing information processing, and a storage device such as RAM (Random Access Memory) or ROM (Read Only Memory), and as software resources, it has at least a sound analysis unit 21, an image analysis unit 22, an age estimation unit 23, a frequency setting unit 24, and a notification control unit 25.

[0031] The sound analysis unit 21 is a functional unit that analyzes the sound acquired by the sound acquisition control unit 12. In particular, the sound analysis unit 21 extracts reflected sound of frequencies emitted by the transmission control unit 11 and analyzes the volume or frequency characteristics of the reflected sound. The sound analysis unit 21 also extracts changes in the position of objects or people inside the vehicle by analyzing the changes in the reflected sound. For example, the sound analysis unit 21 detects the presence of an intruder inside the vehicle when the reflected sound inside the vehicle undergoes a predetermined change. Alternatively, the sound analysis unit 21 may analyze whether sounds other than reflected sound are present and detect the presence of an intruder inside the vehicle when sounds other than reflected sound are present.

[0032] The image analysis unit 22 is a functional unit that analyzes images acquired by the imaging control unit 13 (hereinafter referred to as "captured images"). The image analysis unit 22 analyzes the captured images inside the vehicle to obtain information about the intruder inside the vehicle. The image analysis unit 22 determines whether the captured images include the intruder's face, and if so, it may extract the face from the captured images. Appropriate image processing techniques can be applied to extract faces from images. In addition, the image analysis unit 22 may analyze information about various features that can be identified from information other than the face, such as the intruder's physique, by employing appropriate techniques. The image analysis unit 22 may also refer to an external database to identify the intruder's personal information.

[0033] Furthermore, the image analysis unit 22 determines whether or not the intruder inside the vehicle reacted to the high-frequency sound emitted from the speaker 51. The determination of whether or not there was a reaction may be made, for example, by observing changes in movement before and after the sound is emitted, or by extracting characteristic actions performed when the intruder notices the sound, such as looking left and right, as actions indicating a reaction. Multiple types of actions indicating a reaction are pre-registered in a database, and the image analysis unit 22 may refer to this database to determine whether or not there is an action indicating a reaction.

[0034] The age estimation unit 23 is a functional unit that estimates the age of the intruder based on the analysis results of the captured images by the image analysis unit 22.

[0035] The age estimation unit 23 estimates the age of the intruder based on the frequency of the sound emitted by the transmission control unit 11, that is, the frequency of the sound set by the frequency setting unit 24 (described in detail later), and whether or not there was a reaction to the sound. It is known that the upper limit of human audible frequencies gradually decreases with age. For example, while healthy people of all ages can hear sounds below 9 kHz, the upper limit of audible frequencies gradually decreases, with 10 kHz sounds being audible up to the 60s, 12 kHz sounds up to the 50s, and so on, with mosquito tones being audible only to people under 20 years old. Therefore, the age estimation unit 23 can estimate the age of the intruder based on the frequency of the sound to which there was a reaction. In other words, with a configuration that uses mosquito tones to detect intruders, it is possible to detect the intruder's presence using mosquito tones and to determine whether or not the intruder is of an age to hear mosquito tones.

[0036] The age estimation unit 23 may estimate age based on the extracted face (hereinafter referred to as the face image) if the image analysis unit 22 can extract a face from the captured image. Any known and appropriate method can be used for age estimation based on the face image. For example, age estimation may be performed by pattern recognition by referring to a database in which face images and ages are associated and stored, or estimation may be performed using artificial intelligence. The age estimation unit 23 may also estimate age based on information other than the face, such as physique and posture.

[0037] The frequency setting unit 24 is a functional unit that sets the frequency of the sound emitted by the transmission control unit 11. The frequency setting unit 24 can set the sound emitted inside the vehicle to various frequencies. The sound may include, for example, sounds of multiple frequencies, with an arbitrary frequency as the main component and an arbitrary frequency as the center frequency. The frequency set by the frequency setting unit 24 is output to the transmission control unit 11 and the age estimation unit 23.

[0038] If the frequency setting unit 24 determines, based on the analysis results from the image analysis unit 22, that the intruder is not reacting to the sound, it lowers the set frequency of the sound. The frequency setting unit 24 may also lower the frequency in steps of several Hz.

[0039] The notification control unit 25 is a functional unit that provides notifications regarding intruders. When an intruder is detected in the monitored space by the sound analysis unit 21 and the image analysis unit 22, the notification control unit 25 notifies the user of information indicating that an intruder has been detected. The notification control unit 25 also notifies the user of information indicating that the intruder detection device 1 has entered "alert mode," which emits a warning sound to the intruder and estimates the intruder's age. Furthermore, the notification control unit 25 may also notify the user of the intruder's age estimated by the age estimation unit 23. In addition to or instead of notifying the notification device 2 held by the user, the notification control unit 25 may also notify an external system managed or used by a security company or the like of the above information.

[0040] The memory unit 30 is a functional unit that stores data collected by the sound collection control unit 12 and other units. The memory unit 30 also stores a table that associates the frequency of the sound emitted when an intruder reacts with the age range in which that frequency is audible. This table is referenced by the age estimation unit 23 and used to estimate the age of the intruder based on the frequency of the warning sound that the intruder reacted to.

[0041] Figure 2 is a flowchart showing an example of the process flow when the intruder detection device 1 detects an intruder. The process in Figure 2 is initiated when the door of the monitored space (e.g., a car interior) is locked from the outside.

[0042] First, the transmission control unit 11 transmits a high-frequency sound via the speaker 51 (step SP11). In step SP11, it is preferable to transmit a mosquito tone among the high-frequency sounds. Next, the sound acquisition control unit 12 acquires sound in the monitored space via the microphone 52 (step SP12). Then, the sound analysis unit 21 analyzes the sound acquired by the sound acquisition control unit 12 (step SP13) and stores the analysis result as the initial state in the storage unit 30 (step SP14).

[0043] Next, the sound analysis unit 21 determines whether a certain amount of time (for example, 1 minute) has elapsed since the previous determination (step SP13 or step SP18 (described in detail later)) (step SP15). If a certain amount of time has not elapsed since the previous determination (No in step SP15), the process of step SP15 is repeated.

[0044] If a certain amount of time has elapsed since the previous determination (Yes in step SP15), the transmission control unit 11 transmits a high-frequency sound via the speaker 51 (step SP16). Next, the sound acquisition control unit 12 acquires sound from the monitored space via the microphone 52 (step SP17). Then, the sound analysis unit 21 analyzes the sound acquired by the sound acquisition control unit 12 (step SP18). The processing in steps SP16 to SP17 is the same as the processing in steps SP11 to SP12.

[0045] Next, the sound analysis unit 21 determines whether the analysis result in step SP18 is different from the initial state stored in the memory unit 30 in step SP14 (step SP19). For example, in step SP18, the sound analysis unit 21 analyzes the reflected high-frequency sound and other sounds, and in step SP19, it determines whether the analysis result in step SP18 matches the analysis result in step SP13 (stored in the memory unit 30 in step SP14).

[0046] If the analysis result is the same as the initial state (No in step SP19), the process returns to step SP15. If the analysis result is different from the initial state (Yes in step SP19), the intruder detection device 1 switches to alert mode (step SP20).

[0047] In the process shown in Figure 2, the intruder detection device 1 switched to alert mode in step SP19 when the analysis result differed from the initial state, but the form of switching to alert mode is not limited to this. For example, in step SP19, the device may switch to step SP20 if the analysis result differs from the initial state for a predetermined number of consecutive times or more.

[0048] Figure 3 is a flowchart showing an example of the processing flow of the intruder detection device 1 in alert mode (step SP20). First, the notification control unit 25 notifies the user that the system has entered alert mode (step SP21). Next, the imaging control unit 13 controls the imaging unit 53 to start taking images of the target space (step SP22).

[0049] The image analysis unit 22 determines whether the intruder's face can be extracted from the captured image (step SP23). If the intruder's face can be extracted from the captured image (Yes in step SP23), the age estimation unit 23 extracts the face (face image) from the captured image and estimates the age based on the face image (step SP24). Then, the notification control unit 25 notifies the user or others of the estimated age of the intruder (step SP25).

[0050] If the intruder's face cannot be identified from the captured image (No in step SP23), the analysis control unit 20 performs a process to estimate the age based on sound (step SP30). Then, the notification control unit 25 notifies the user of the estimated age of the intruder (step SP25).

[0051] In the flowchart shown in Figure 2, if the intruder's face can be extracted from the captured image (Yes in step SP23), the age estimation unit 23 estimates the age based on the face image (step SP24). However, the processing when the intruder's face can be extracted from the captured image (Yes in step SP23) is not limited to this. For example, when the intruder's face can be extracted from the captured image (Yes in step SP23), both age estimation based on the face image (step SP24) and age estimation based on sound (step SP30) may be performed. This makes the age estimation more accurate.

[0052] Furthermore, the intruder detection device 1 may transmit a warning sound to the monitored space at the end of the alert mode (step SP20), for example, simultaneously with or immediately after step SP25. For example, the notification control unit 25 may notify the user via the transmission control unit 11 and speaker 51 of a warning sound directed at the intruder and the estimated age of the intruder.

[0053] Figure 4 is a flowchart showing an example of the processing flow for the process of estimating age using sound (step SP30). The frequency setting unit 24 sets the frequency of the sound to be generated to the highest value within the settable range (step SP31). In step SP31, the frequency setting unit 24 sets the frequency to the highest frequency among mosquito tones (approximately 20 kHz). Next, the transmission control unit 11 transmits a warning sound at the frequency set by the frequency setting unit 24 from the speaker 51 (step SP32).

[0054] Next, the imaging control unit 13 controls the imaging unit 53 to start capturing images within the target space (step SP33). Then, the image analysis unit 22 analyzes the captured image acquired in step SP33 (step SP34) and determines whether or not the intruder reacted to the sound (step SP35).

[0055] If it is determined that the intruder has reacted to the sound (Yes in step SP35), the age estimation unit 23 estimates the intruder's age based on the frequency to which the intruder reacted (step SP36). The age estimation unit 23 may also store the estimation result in the storage unit 30. Then the process returns to step SP25 (see Figure 2).

[0056] If it is determined that no intruder has reacted (No in step SP35), the frequency setting unit 24 lowers the frequency of the warning sound by one step (step SP37). By repeatedly lowering the frequency of the warning sound by one step when no intruder reacts, the frequency at which the intruder reacted can be identified. This allows the analysis control unit 20 to accurately estimate the age of the intruder. The process then returns to step SP32.

[0057] Furthermore, if the intruder does not react or reacts only slightly even when the frequency of the warning sound is lowered to a predetermined frequency, the analysis control unit 20 may determine that the intruder has a hearing problem. This allows the system to acquire characteristics related to the intruder's hearing.

[0058] According to this embodiment, intruders can be detected using sound alone. Therefore, intruders in the monitored space can be detected with a simple configuration. In particular, since no special configuration other than sound transmission and reception is required, intruders can be easily detected by reusing existing equipment. Furthermore, since it appears to be a standard device configuration and does not require the placement of special equipment, intruders can be detected without arousing suspicion.

[0059] Furthermore, according to this embodiment, since intruders are detected using sounds of different frequencies that are audible or inaudible depending on age, it is possible to detect the intruder's presence by sound and estimate the intruder's age. In particular, by emitting a warning sound with gradually decreasing frequencies, the intruder's age can be estimated.

[0060] Furthermore, in this embodiment, if the intruder's face is sufficiently recognizable, age estimation can be performed from the facial image. In addition, age estimation becomes more accurate by performing age estimation using both sound and image.

[0061] While embodiments of this invention have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments, and design modifications and the like are also included within the scope of the gist of this invention. Furthermore, although the monitored space in this embodiment was described as being the interior of a vehicle, the technical scope of this invention is not limited to this and can be applied to any suitable space. [Explanation of symbols]

[0062] 1: Intruder detection device 2: Notification device 10: Detection Control Unit 11: Transmission Control Unit 12: Sound Collection Control Unit 13: Imaging control unit 20: Analysis Control Unit 21:Sound analysis section 22: Image Analysis Department 23: Age Estimation Section 24: Frequency setting section 25: Notification Control Unit 30: Storage section 50: Monitoring device 51: Speaker 52: Mike 53: Imaging Unit

Claims

1. A signaling control unit that emits high-frequency sound into the monitored space, A sound acquisition control unit that acquires sound in the monitored space, A sound analysis unit detects intruders into the monitored space by analyzing the sound collected by the sound collection control unit, An imaging control unit that acquires an image of the monitored space, An image analysis unit analyzes the captured image, which is an image acquired by the aforementioned image acquisition control unit. An age estimation unit that estimates the age of the intruder based on the analysis results of the captured image, An alert control unit that notifies that the aforementioned intruder has been detected, Equipped with, The aforementioned transmission control unit emits a mosquito sound, The image analysis unit determines whether or not the intruder reacted to the sound in the monitored space. The age estimation unit determines, based on the determination result of the image analysis unit, whether or not the intruder is of an age where they can hear mosquito sounds. An intruder detection device characterized by the following features.

2. The system further includes a frequency setting unit for setting the frequency of the sound emitted by the aforementioned transmission control unit, The aforementioned transmission control unit transmits sounds of different frequencies that are audible or inaudible depending on age. The frequency setting unit, when the image analysis unit determines that the intruder is not reacting to the sound, lowers the frequency of the sound transmitted by the transmission control unit. The age estimation unit estimates the age of the intruder based on the frequency of the sound transmitted by the transmission control unit and the determination result of the image analysis unit. The intruder detection device according to feature 1.

3. The image analysis unit, if the captured image contains the face of the intruder, extracts the face from the captured image. The age estimation unit estimates the age of the intruder based on the facial image, which is the extracted face. The intruder detection device according to feature 2.

4. A method for detecting intruders in a monitored space, The steps include: transmitting high-frequency sound into the monitored space; The steps include acquiring sound in the monitored space, The steps include: detecting the intruder into the monitored space by analyzing the acquired sound; Steps to emit a mosquito sound, The steps include: analyzing the captured image, which is an image of the monitored space acquired by the imaging control unit, and determining whether or not the intruder reacted to sound in the monitored space; Based on the results of the analysis of the captured images, the step of determining whether the intruder is of an age to hear mosquito sounds, The steps include reporting the estimated age of the intruder, An intruder detection method characterized by including [a certain element].

5. Computers, A signaling control unit that emits high-frequency sound into the monitored space. A sound acquisition control unit that acquires sound in the monitored space, A sound analysis unit detects intruders into the monitored space by analyzing the sound collected by the sound collection control unit. An imaging control unit that acquires an image of the monitored space, An image analysis unit analyzes the captured image, which is an image acquired by the aforementioned image capture control unit. An age estimation unit that estimates the age of the intruder based on the analysis results of the captured image, A notification control unit that notifies that the aforementioned intruder has been detected, To make it function as, The aforementioned transmission control unit emits a mosquito sound, The image analysis unit determines whether or not the intruder reacted to the sound in the monitored space. The age estimation unit determines, based on the determination result of the image analysis unit, whether or not the intruder is of an age where they can hear mosquito sounds. An intruder detection program characterized by the following features.

Images