JP2010257249A - On-vehicle security device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle security device for detecting an suspicious person, before vibration is imparted to a vehicle, to issue a warning, and for preventing a noise from being generated with an output of a warning sound by an erroneous operation. <P>SOLUTION: A camera 2 for imaging an outside of the vehicle is mounted on the vehicle 1, and the on-vehicle security device determines the presence of a person included in a pick-up image, by image-processing an image picked up by the camera 2, to detect a face. A projector 3 is arranged in an inside of the vehicle 1, a transmission type screen 4 is bonded onto a window of the vehicle 1, and the on-vehicle security device displays a warning image on the transmission type screen 4 by the projector 3, when the person is included in the pick-up image from the camera 2. The on-vehicle security device determines whether the face of the person in the pick-up image is the face of the same person same to any of faces of registered users or not, by comparing the face of the person detected from the pick-up image by the camera 2, with the faces of the users registered preliminarily, and does not issue the warning when determined to be the same person. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an in-vehicle security device capable of accurately finding a suspicious person existing around a vehicle and giving a warning.

  Conventionally, crime prevention devices for preventing crimes such as theft of vehicles and vandalism are mounted on vehicles. For example, crime prevention devices that are equipped with sensors that detect vehicle vibrations and that output a warning sound from the speaker to the outside of the vehicle when detecting vibrations that occur when the vehicle door is opened are widespread. .

  In Patent Document 1, a transmissive liquid crystal panel is attached to a vehicle window, and an abnormality to the vehicle is detected by detecting vibration. When an abnormality occurs, a notification is given by voice output and a video message is displayed on the liquid crystal panel. Thus, there has been proposed a video display device capable of displaying a video message to a person existing outside the vehicle and preventing the vehicle from being stolen.

  In Patent Document 2, a transmissive screen is attached to the inner surface of a window capable of transmitting visible light provided in a vehicle such as a taxi, and a projector is mounted on the ceiling of the vehicle. There has been proposed an image display system capable of displaying an advertisement or the like outside a vehicle by projecting an advertisement video without being affected by the environment outside the vehicle.

Japanese Patent Laid-Open No. 2006-082603 JP 2006-113230 A

  However, since conventional crime prevention devices are configured to detect the vibration of the vehicle and output a warning sound, the output of the warning sound may be delayed when the vibration is detected, for example, after the vehicle door has already been opened. There is. In order to improve this, the sensitivity of the sensor can be increased, but there is a problem that the security device malfunctions, such as detecting fine vibrations caused by other people and other vehicles unrelated to crimes operating around the vehicle. The video display device described in Patent Document 1 has a similar problem because it is configured to detect vehicle abnormality by vibration.

  Further, since the security device outputs a warning sound, there is a problem that the warning sound becomes a noise when the warning sound is output due to a malfunction, particularly at night or early morning. In recent crime prevention devices, a function of performing wireless communication with a communication device carried by a vehicle owner (owner) and capable of notifying the communication device when a vehicle abnormality is detected is provided. is there. In the case of this crime prevention device, it can be configured not to output a warning sound, so the problem of noise can be solved, but notification cannot be made if the owner is not within the range of wireless communication In addition, there is a problem that the crime prevention effect is low because warning cannot be given to the vicinity of the vehicle. There are also crime prevention devices that can give warnings by light emission for vehicle abnormalities, but light emission is often done using LEDs (Light Emitting Diodes) etc., and the problem is that the crime prevention effect is low because the amount of light is small There is.

  In addition, in-vehicle security devices are often configured to stop abnormality detection and output of warning sound when a vehicle door is unlocked. For this reason, if a person other than the owner who possesses the key for unlocking gives vibration to the vehicle, the security device will output a warning sound even if this person is the owner's family, friends, etc. Do. The vehicle is often parked in the owner's home parking lot, and the owner's family may come and go around it, causing vibrations to the vehicle, and this causes a problem that the warning sound output becomes noise is there.

  The present invention has been made in view of such circumstances, and an object of the present invention is to detect a suspicious person and issue a warning before vibration is applied to the vehicle, and to warn of malfunction. An object of the present invention is to provide an in-vehicle security device capable of preventing noise generation due to sound output.

  The in-vehicle security device according to the present invention is mounted on a vehicle and includes an imaging unit that performs imaging outside the vehicle, a determination unit that determines whether a person is included in an image captured by the imaging unit, and the determination unit. Warning means for giving a warning when it is determined that a person is included is provided.

  The in-vehicle security device according to the present invention further includes a transmission screen disposed in a window of the vehicle, and an image projection unit that is mounted inside the vehicle and projects an image onto the transmission screen. The warning means projects the warning image onto the transmissive screen by the image projection means.

  The vehicle-mounted security device according to the present invention projects an image by the image projection unit according to the position of the person in the image when the determination unit determines that a person is included in the image. Displacement means for displacing the position is further provided.

  The in-vehicle security device according to the present invention further includes a face detection unit that detects a human face from an image captured by the imaging unit, and the determination unit performs determination according to a detection result of the face detection unit. It is characterized by the above.

  Moreover, the vehicle-mounted security device according to the present invention includes a storage unit that stores one or a plurality of human faces, and the face detected by the detection unit is the same person's face as the face stored in the storage unit. Authentication means for determining whether or not the warning means stores the person's face in the storage means even when the determination means determines that a person is included. If the authentication unit determines that the face is the same person's face, no warning is given.

  In addition, the in-vehicle security device according to the present invention further includes a voice output unit that outputs a voice, and the warning unit outputs a warning sound by the voice output unit.

  In addition, the in-vehicle security device according to the present invention further includes a communication unit that performs wireless communication with another device outside the vehicle, and the warning unit makes a report to the other device by the communication unit. It is characterized by being.

  Further, the in-vehicle security device according to the present invention is characterized in that, when the warning means makes a notification to the other apparatus through the communication means, the image picked up by the image pickup means is transmitted. .

  In the present invention, it is determined whether or not a person is included in the image by mounting an imaging unit for imaging outside the vehicle on the vehicle and performing image processing on the outside image captured by the imaging unit. To do. Accordingly, the in-vehicle security device can detect whether or not there is a person around the vehicle and the approach of the person to the vehicle without using a sensor or the like that detects vibration. If a person is included in the captured image, the in-vehicle security device issues a warning. Thereby, the in-vehicle security device can detect the suspicious person and give a warning before the vibration related to the crime is given to the vehicle.

  In the present invention, a transmissive screen is provided in the vehicle window, and image projection means for projecting an image onto the transmissive screen is mounted inside the vehicle. When a person is included in the captured image, the in-vehicle security device projects a warning image including a warning message on a transmissive screen arranged in a window of the vehicle using an image projection unit. As a result, a warning image can be displayed on the window of the vehicle, and this warning image can be visually recognized by a person (especially a person imaged by the imaging means) around the vehicle. Since the warning sound is not output, there is no problem of noise generation due to malfunction. In addition, compared with light emission from an LED or the like, the warning image displayed on the window of the vehicle is easy to visually recognize from a distance of the vehicle, so that the crime prevention effect is high. Therefore, the in-vehicle security device of the present invention can issue a warning over a wide range around the vehicle without generating noise.

The imaging means mounted on the vehicle can take an image over a wide range around the vehicle, for example, by using a fish-eye lens or a wide-angle lens. It is also possible to adopt a configuration in which imaging is performed over a wide range around the vehicle by rotating the imaging means in the horizontal direction. When a person is included in the image obtained by imaging, the position of the person around the actual vehicle can be determined from the position of the person in the image.
Therefore, in the present invention, the transmissive screen is disposed in a plurality of (for example, all) windows of the vehicle, and the image projection position is displaced by rotating the image projection means mounted in the vehicle in the horizontal direction. By displacing the projection position of the image projection unit according to the position of the person determined from the captured image, it is possible to display a warning image at a position that is easily visible to the person around the vehicle.

  In the present invention, it is determined whether or not a person is included in the image captured by the imaging means by detecting a person's face. Thereby, it can be determined easily and reliably whether or not there is a person around the vehicle. Further, it is possible to discriminate people existing around the vehicle by face detection.

In the present invention, the faces of persons such as the owner of the vehicle, its family and friends are stored in advance in the in-vehicle security device. Thereby, the in-vehicle security device can determine whether the person imaged by the imaging unit is a suspicious person by comparing the face of the person imaged by the imaging unit with the face stored in advance. (Face authentication function). If the face of the person imaged by the imaging means is the same person as the face stored in advance, the in-vehicle security device determines that the person imaged by the imaging means is not a suspicious person and does not issue a warning.
Therefore, the in-vehicle security device of the present invention can give a warning only when there is a suspicious person around the vehicle, and even the owner's family and friends who do not own the vehicle key are not subject to the warning. be able to.

  Also, in the present invention, when the in-vehicle security device has an authentication function based on a face stored in advance, a warning sound is output to a suspicious person using a speaker mounted on the vehicle. Thereby, the warning with respect to a suspicious person can be performed more effectively. Since it has a face authentication function, it is unlikely that a warning sound will be output due to a malfunction, and noise is unlikely to occur.

  In the present invention, the in-vehicle security device includes a communication unit that performs wireless communication with other devices outside the vehicle. Thus, for example, a communication device carried by the vehicle owner (may be dedicated to communication with the vehicle or may be a mobile phone device) and the vehicle security device can communicate with each other, When a suspicious person is detected around the vehicle, a report to the owner can be made. Moreover, it is good also as a structure which a vehicle-mounted security device reports to a police or a security company directly by a communication means. By making a report by wireless communication, crimes against the vehicle can be prevented at an early stage.

  In the present invention, when reporting by wireless communication is performed, the image captured by the imaging means mounted on the vehicle is transmitted from the in-vehicle security device to another device outside the vehicle. As a result, the image of the suspicious person's face and the image around the vehicle when the suspicious person is detected can be transmitted to the owner, etc. Can be confirmed from the image.

In the case of the present invention, a suspicious person is detected before a vibration related to a crime is given to the vehicle by providing a warning when a person is included in an image outside the vehicle imaged by the imaging means. Since a warning can be given, a warning for a suspicious person can be given reliably, and a crime against a vehicle can be prevented more reliably.
Further, by adopting a configuration in which a warning image is projected onto a transmission screen arranged in a vehicle window, an effective warning can be given to a suspicious person without causing noise due to malfunction.

It is a schematic diagram for demonstrating the structure of the vehicle-mounted crime prevention apparatus which concerns on this invention. It is a block diagram which shows the structure of the vehicle-mounted crime prevention apparatus which concerns on this invention. It is a schematic diagram for demonstrating the warning to the suspicious person which the vehicle-mounted crime prevention apparatus which concerns on this invention performs. It is a schematic diagram for demonstrating the warning to the suspicious person which the vehicle-mounted crime prevention apparatus which concerns on this invention performs. It is a flowchart which shows the procedure of the warning process which the vehicle-mounted security device which concerns on this invention performs. It is a flowchart which shows the procedure of the warning process which the vehicle-mounted security device which concerns on this invention performs. It is a flowchart which shows the procedure of the warning process which the vehicle-mounted crime prevention apparatus which concerns on a modification performs.

  Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof. FIG. 1 is a schematic diagram for explaining a configuration of an in-vehicle security device according to the present invention. In the figure, reference numeral 1 denotes a vehicle equipped with an in-vehicle security device according to the present invention. In FIG. 1, (a) shows the configuration of the vehicle 1 in plan view, and (b) shows the configuration of the vehicle 1 in side view.

  The vehicle 1 equipped with the in-vehicle security device according to the present invention is provided with a camera 2 on the ceiling, for example, inside the vehicle, and the camera 2 can take an image outside the vehicle through the window of the vehicle 1 from the inside of the vehicle. The camera 2 has a lens with a wide angle of view, such as a wide-angle lens or a fish-eye lens, and can image the periphery of the vehicle 1 over 360 ° in the horizontal direction.

  Further, the vehicle 1 is provided with a projector 3 on, for example, a ceiling in the vehicle, and a plurality of windows provided on the front, rear, left, and right sides of the vehicle 1 are attached with transmissive screens 4 respectively. The transmissive screen 4 transmits visible light and can display an image projected from the projector 3. However, the transmissive screen 4 has a high transmittance that does not hinder the driving of the vehicle 1 or a screen that can change the transmittance depending on whether or not the vehicle 1 is traveling. It is desirable. In the present embodiment, the transmissive screen 4 has a high transmittance so as not to hinder the operation.

  FIG. 2 is a block diagram showing the configuration of the in-vehicle security device according to the present invention. The camera 2 and the projector 3 described above are connected to an ECU (Electronic Control Unit) 10 mounted at an appropriate position of the vehicle 1 via a signal line. The ECU 10 includes a control unit 11, a captured image processing unit 12, a rotation control unit 13, a projection image processing unit 14, an audio signal output unit 15, an in-vehicle communication unit 16, a storage unit 17, a wireless communication unit 18, and the like. Yes.

  The captured image processing unit 12 performs various image processing on the image captured by the camera 2 and gives the processed image to the control unit 11. Since the camera 2 performs imaging using a lens with a wide angle of view, an image obtained by imaging is an image with a curved peripheral portion. Therefore, the captured image processing unit 12 performs image processing for correcting the curved portion of the image captured by the camera 2. Further, the captured image processing unit 12 may correct the brightness or hue of an image captured by the camera 2. Furthermore, the captured image processing unit 12 of the present invention can perform image processing for detecting a human face from an image captured by the camera 2, and if a face is detected from the captured image, that fact is sent to the control unit 11. In addition to the notification, the detected face feature information is given to the control unit 11.

  The in-vehicle security device of the present invention includes a rotation mechanism 21 that rotates the projector 3 in the horizontal direction by a motor or an actuator. By rotating the projector 3 in the horizontal direction by the rotation mechanism 21 and displacing the projection position of the image, the transmissive screen 4 pasted on any of the plurality of windows provided on the front, rear, left and right of the vehicle 1. In contrast, the projector 3 can project an image. The rotation of the projector 3 by the rotation mechanism 21 is controlled by the rotation control unit 13 of the ECU 10, and the rotation control unit 13 responds to a rotation instruction given from the control unit 11 of the ECU 10, such as a motor or an actuator of the rotation mechanism 21. A drive signal for driving is output.

  The projection image processing unit 14 generates an image to be projected by the projector 3 in accordance with an instruction from the control unit 11, and outputs an image signal related to the generated image to the projector 3. The transmissive screen 4 on which the projector 3 projects an image is attached to the window of the vehicle 1, and the window of the vehicle 1 is not always provided perpendicular to the ground. Further, one projector 3 is configured to project an image onto a plurality of transmissive screens 4 that are pasted on the window of the vehicle 1 by displacing the projection position, and each transmissive screen 4 corresponds to the projection direction of the projector 3. It is not always provided vertically. Because of these factors, the image projected from the projector 3 may be distorted vertically or horizontally, so that the projection image processing unit 14 performs image processing (so-called trapezoid correction processing) for correcting distortion of the projection image.

  The in-vehicle security device includes a speaker 5 that outputs sound to the outside of the vehicle 1. The speaker 5 is connected to the ECU 10 via a signal line for transmitting an audio signal, and performs audio output according to an audio signal given from the audio signal output unit 15 of the ECU 10. The audio signal output unit 15 generates and outputs an audio signal in response to an instruction from the control unit 11.

  An in-vehicle network such as a CAN (Controller Area Network) is built in the vehicle 1, and the ECU 10 of the in-vehicle security device communicates with various in-vehicle devices such as an IG (ignition) switch 31 and a door lock ECU 32 via the in-vehicle network. Data can be sent and received between them. The ECU 10 includes an in-vehicle communication unit 16 that performs communication processing through the in-vehicle network. The in-vehicle communication unit 16 converts the data given from the control unit 11 into a data format suitable for the communication protocol and transmits the data to other in-vehicle devices, and receives data from the other in-vehicle devices to receive data from the control unit 11. The data is converted into a data format suitable for processing and given to the control unit 11. Thereby, the control part 11 can acquire information, such as the connection state of the IG switch of the vehicle 1, the locked state of the door of the vehicle 1, etc. via the in-vehicle network.

  The ECU 10 has a storage unit 17 that stores various programs and data. The storage unit 17 is configured by a nonvolatile memory element such as an EEPROM (Electrically Erasable Programmable Read Only Memory) or a flash memory, for example, and authentication information 50 is stored in the storage unit 17 of the in-vehicle security device according to the present invention. ing. In the authentication information 50, face information of users such as the driver of the vehicle 1, its family, and friends is registered in advance. Thereby, the control unit 11 compares the information related to the face of the person detected from the captured image of the camera 2 with the face information of the user registered in the authentication information 50, and the person detected from the captured image is registered. It is possible to determine whether or not the user is a new user.

  The in-vehicle security device has a function of performing wireless communication with the portable communication device 40 possessed by the user, and the ECU 10 has a wireless communication unit 18. For example, the portable communicator 40 can be a wireless communicator built in a key holder attached to the key of the vehicle 1 possessed by the user. In this case, the wireless communicator 18 of the ECU 10 is arranged around the vehicle 1. It can be set as the structure which transmits / receives a radio signal within the range of about several 10 m-several 100 m, and communicates with the portable communication apparatus 40 which a user possesses. Further, for example, the portable communication device 40 can be a mobile phone held by the user, and in this case, the wireless communication unit 18 of the ECU 10 has a portable communication held by the user via a commercial mobile phone network. The electronic mail can be transmitted to and received from the device 40. The wireless communication unit 18 performs wireless transmission to the portable communication device 40 in response to an instruction from the control unit 11, receives a wireless signal from the portable communication device 40, and provides the received content to the control unit 11. In addition, the wireless communication unit 18 can transmit an image captured by the camera 2 to the portable communication device 40.

  The in-vehicle security device according to the present invention determines whether or not there is a suspicious person around the vehicle 1 based on a captured image of the camera 2, and if there is a suspicious person, it is attached to the window of the vehicle 1. In addition, a warning image is displayed on the transmission screen 4, a warning sound is output from the speaker 5, and a notification is sent to the portable communication device 40 possessed by the user. 3 and 4 are schematic diagrams for explaining warnings to suspicious persons performed by the in-vehicle security device according to the present invention.

  The in-vehicle security device starts the operation in a state where the engine of the vehicle 1 is stopped and the door is locked (parking state), and the camera 2 performs imaging outside the vehicle. When a person 100 is present around the parked vehicle 1, the person 100 is imaged by the camera 2. An image captured by the camera 2 is given from the camera 2 to the captured image processing unit 12 of the ECU 10, and the captured image processing unit 12 performs a face detection process for detecting a human face. A face is detected and this is notified from the captured image processing unit 12 to the control unit 11, and the feature of the detected face is given to the control unit 11.

  When a face is detected from the captured image of the camera 2, the control unit 11 determines the facial features given from the captured image processing unit 12 and the facial features of the person registered in advance in the authentication information 50 of the storage unit 17. The face authentication process is performed to determine whether or not the person 100 imaged by the camera 2 is the same person as the person registered in advance. As a result of the face authentication process, when it is determined that the person 100 imaged by the camera 2 is not the same person as the person registered in advance, the control unit 11 gives an instruction to the projection image processing unit 14 to give an instruction from the projector 3. The warning image is projected onto the transmissive screen 4. As the warning image projected on the transmissive screen 4, for example, an image including a message “Suspicious person found!

  In addition, the camera 2 performs imaging using a wide-angle lens or a lens having a wide angle of view such as a fish-eye lens. For example, the camera 2 can capture an image of the periphery of the vehicle 1 over 360 °, and an image captured by the camera 2. The control unit 11 can determine at which position around the vehicle 1 the person 100 exists from the position at which the person 100 is captured (the position at which the face of the person 100 is detected). Therefore, for example, when the control unit 11 determines that the person 100 exists on the right side of the vehicle 1, the control unit 11 projects the warning image onto the transmission screen 4 attached to the right window of the vehicle 1. The projection position is displaced by the rotation mechanism 21 (see FIG. 4A). For example, when it is determined that the person 100 is present on the left side of the vehicle 1, the control unit 11 sets the projection position of the projector 3 so as to project a warning image onto the transmission screen 4 attached to the left window of the vehicle 1. It is displaced by the rotation mechanism 21 (see FIG. 4B).

  In addition, when the warning image is projected onto the transmission screen 4 by the projector 3, the control unit 11 outputs a warning sound from the speaker 5 by giving an output instruction to the audio signal output unit 15, and also outputs to the wireless communication unit 18. By giving the captured image of the camera 2, the portable communication device 40 is notified that the captured image is wirelessly transmitted. As a result, the in-vehicle security device can give a warning image and warning to the person 100 existing around the vehicle 1 and can notify the user who owns the portable communication device 40. Crime against 1 can be prevented in advance.

  5 and 6 are flowcharts showing a procedure of warning processing performed by the in-vehicle security device according to the present invention, and shows processing performed by the control unit 11 of the ECU 10. The control unit 11 of the ECU 10 first determines whether or not the door of the vehicle 1 is unlocked based on information obtained from the door lock ECU 32 through in-vehicle communication by the in-vehicle communication unit 16 (step S1). When the door is not unlocked (S1: NO), the control unit 11 performs imaging outside the vehicle with the camera 2 (step S2), acquires the captured image with the captured image processing unit 12, and acquires the acquired imaging. A face detection process for detecting a human face from the image is performed (step S3). The control unit 11 determines whether or not there is a person around the vehicle 1 according to whether or not a person's face is detected by the face detection process of the captured image processing unit 12 (step S4). If it does not exist (S4: NO), the process returns to step S1, and the above process is repeated.

  When a face is detected by the face detection process and it is determined that there is a person (S4: YES), the control unit 11 includes information related to the facial feature detected by the captured image processing unit 12 and authentication information 50 in the storage unit 12. The face authentication process for determining whether or not the captured facial feature matches the registered facial feature is performed by comparing the information related to the facial feature of the user registered in advance (step S1). S5). The control unit 11 determines whether the person imaged by the camera 2 is a person whose face has been registered in the authentication information 50 from the result of the face authentication process (step S6), and the imaged person is registered. If the user is already completed (S6: YES), the process returns to step S1 without warning and the above process is repeated.

  When the imaged person is not a registered person (S6: NO), the control unit 11 determines that the person imaged by the camera 2 is a suspicious person, and responds to the imaging position of the suspicious person in the captured image of the camera 2. Then, a position determination process for determining the position of the suspicious person around the vehicle 1 is performed (step S7). Next, the control unit 11 gives a process to rotate the projector 3 in the horizontal direction toward the window of the vehicle 1 corresponding to the position of the suspicious person by giving an instruction to the rotation control unit 13 according to the result of the position determination process. (Step S8), and a warning image is projected onto the transmissive screen 4 attached to the corresponding window (Step S9).

  Furthermore, the control unit 11 outputs a warning sound from the speaker 5 by giving an audio output instruction to the audio signal output unit 15 (step S10), and also gives an image captured by the camera 2 to the wireless communication unit 18. By transmitting to the portable communication device 40, a wireless report is made to the user who owns the portable communication device 40 (step S11). Then, the control part 11 returns a process to step S1, and repeats the above-mentioned process. If it is determined in step S1 that the door of the vehicle 1 has been unlocked (S1: YES), the control unit 11 ends the process of giving a warning to the approach of the suspicious person.

  In the in-vehicle security device having the above configuration, the camera 2 that performs imaging outside the vehicle is mounted on the vehicle 1, and the captured image includes a person by performing image processing for face detection on the captured image. By determining whether or not and making a warning according to the determination result, the in-vehicle security device detects the presence of a person around the vehicle 1 without using a sensor or the like that detects vibration. A warning can be given. Therefore, since the vehicle-mounted security device of the present invention can detect and give a warning to a suspicious person before the vibration relating to the crime is given to the vehicle 1, it can surely give a warning to the suspicious person, Crimes against the vehicle 1 can be prevented more reliably.

  In addition, the projector 3 is disposed inside the vehicle 1, and the transmissive screen 4 is pasted on the window of the vehicle 1, and when the captured image of the camera 2 includes a person, the projector 3 With the configuration in which the warning image is displayed on 4, the warning image can be displayed on the window of the vehicle 1 so that a person existing in the vicinity can visually recognize it. Compared with a warning by light emission from an LED or the like, the warning image displayed on the window of the vehicle 1 is easy to see from a distance, so that the crime prevention effect is high. The in-vehicle security device according to the present embodiment is configured to output a warning sound from the speaker 5, but has a function of projecting a warning image from the projector 3 onto the transmissive screen 4, and therefore may be configured without the speaker 5. Well, in the case of this configuration, the in-vehicle security measure can give a warning over a wide area around the vehicle 1 by projecting a warning image without generating noise.

  In addition, the camera 2 can capture the periphery of the vehicle 1 over a wide range using a lens having a wide angle of view, and the in-vehicle security device detects a suspicious person over a wide range around the vehicle 1 and gives a warning. be able to. In addition, the transmission screen 4 is attached to a plurality of windows of the vehicle 1, and the projector 3 provided in the vehicle 1 is rotated by the rotation mechanism 21 in accordance with the position of the person included in the captured image of the camera 2. By doing so, the in-vehicle security device can display a warning image at a position where a person existing around the vehicle 1 is easily visible, and can perform a more effective warning.

  Further, by comparing the face of the person detected from the captured image of the camera 2 with the face of the user registered in advance in the authentication information 50 of the storage unit 17, the face of the person registered in the captured image and the user's face registered. It is determined whether or not the face is the face of the same person, and if it is not the same person, not only the owner who owns the key of the vehicle 1 but also the family and friends, etc. Can also be excluded from warnings. As a result, even if the in-vehicle security device is provided with the speaker 5 and outputs a warning sound, the output of the warning sound to other than the suspicious person is suppressed. Can be suppressed.

  Further, when a suspicious person is detected in the vicinity of the vehicle 1 by the imaging of the camera 2, the wireless communication unit 18 wirelessly notifies the portable communication device 40 together with the warning image projected by the projector 3. , Crimes against the vehicle 1 can be prevented earlier. In addition, the radio | wireless notification which an in-vehicle security device performs is not restricted to the portable communication device 40 which a user possesses, For example, you may report to a police or a security company. Further, when making a wireless report to the portable communication device 40, the wireless communication unit 18 transmits an image around the vehicle 1 captured by the camera 2, that is, an image captured by the suspicious person. The owner who has received this image with the portable communication device 40 can confirm the situation of the vehicle 1 and its surroundings from the image.

  In the present embodiment, the camera 2 is configured to capture the periphery of the vehicle 1 over a wide range using a lens with a wide angle of view. However, the present invention is not limited to this, and the camera 2 is similar to the projector 3. It is good also as a structure which rotates the periphery of the vehicle 1 over a wide range by rotating horizontally by a rotation mechanism. In this case, the camera 2 and the projector 3 may be integrally rotated by a common rotation mechanism. Further, if the projector 3 can project an image over a wide range, the rotation mechanism 21 may be omitted.

  In addition, the camera 1 and the projector 3 are each mounted on the vehicle 1, but the present invention is not limited to this, and a configuration in which a plurality of cameras 2 and projectors 3 are mounted may be employed. For example, the camera 2 and the projector 3 may be mounted on the front, rear, left, and right of the vehicle 1 to detect a suspicious person and project a warning image in each direction of the vehicle 1. Also, the number of cameras 2 and projectors 3 need not be the same. Further, the camera 2 may be a camera that receives infrared rays and performs imaging.

  In addition, although the transmission type screen 4 is pasted on all the windows of the vehicle 1, it is not limited to this. For example, the transmissive screen 4 may be attached only to the left and right windows of the vehicle 1 and the transmissive screen 4 may not be provided to the front and rear windows. Further, the projector 3 is configured to project an image on which a warning message as shown in FIG. 3 is projected as a warning image projected onto the transmissive screen 4, but this warning image is an example and is not limited to this. Instead, other various images may be projected as warning images. Further, for example, the projector 3 may project an image captured by the camera 2 onto the transmissive screen 4, and the projector 3 projects the user's face registered in the authentication information 50 of the storage unit 17 onto the transmissive screen 4. It is good also as a structure.

  The in-vehicle security device is configured to perform three warnings, that is, when a suspicious person is detected in the vicinity of the vehicle 1, projection of a warning image by the projector 3, output of a warning sound by the speaker 5, and wireless notification by the wireless communication unit 18. However, the present invention is not limited to this, and any configuration that performs at least one of these three warnings may be used. Further, for example, a configuration may be adopted in which an optical sensor or the like is provided to perform daytime and nighttime determination, sound output by the speaker 5 is performed during the daytime, and a warning image is projected by the projector 3 at nighttime.

  Further, when a human face is included in the image captured by the camera 2, the distance from the vehicle 1 to the person can be estimated based on the size of the face in the image. Therefore, when a face is detected in the face detection process of the captured image processing unit 12, the in-vehicle security device estimates the distance from the face size to the person in the captured image, and this distance is smaller than a predetermined distance. Only a warning may be used.

  In addition, in order to prevent the battery of the vehicle 1 from running out, processing performed by the in-vehicle security device such as imaging by the camera 2 and face detection processing is performed, for example, until a predetermined time elapses after the engine of the vehicle 1 is stopped, It is good also as a structure which stops a process after progress of predetermined time. Further, for example, a means for detecting the remaining capacity of the battery may be provided, and the processing of the in-vehicle security device may be stopped when the remaining capacity of the battery becomes less than a predetermined amount.

(Modification)
The in-vehicle security device according to the above-described embodiment determines whether the person's face included in the captured image of the camera 2 and the person's face registered in the authentication information 50 belong to the same person. Although it is the structure which performs a face authentication process, the vehicle-mounted crime prevention apparatus which concerns on a modification is a simple structure which does not perform a face authentication process. The in-vehicle security device according to the modification does not store the authentication information 50 in the storage unit 17. An image picked up by the camera 2 is given to the picked-up image processing unit 12, and the picked-up image processing unit 12 performs face detection processing for detecting a human face from the given picked-up image and sends the detection result to the control unit 11. give.

  Further, the vehicle 1 of the modified example is configured to be able to open and close the door, start the engine, and the like by a remote operation type key (so-called smart key) possessed by the user, and the control unit 11 of the ECU 10 includes an in-vehicle communication unit Through the 16 in-vehicle communication, the door lock ECU 32 acquires information on whether or not the smart key possessed by the user is within a predetermined range (within the reach of radio waves) from the vehicle 1.

  When the captured image processing unit 12 detects a face from the captured image, the control unit 11 displays a warning image from the projector 3 on the transmissive screen 4 and wirelessly communicates with the portable communication device 40 by the wireless communication unit 18. Alert notifications. However, even if a face is detected from the captured image, if the smart key is within a predetermined range based on information from the door lock ECU 32, the face of the person captured by the camera 2 is that of the user. Since the determination can be made, the control unit 11 does not issue a warning.

  FIG. 7 is a flowchart showing a procedure of warning processing performed by the in-vehicle security device according to the modification. The control unit 11 of the ECU 10 according to the modification first determines whether or not the door of the vehicle 1 is unlocked based on information obtained from the door lock ECU 32 through in-vehicle communication by the in-vehicle communication unit 16 (step) S21). When the door is not unlocked (S21: NO), the control unit 11 performs imaging outside the vehicle with the camera 2 (step S22), acquires the captured image with the captured image processing unit 12, and acquires the acquired imaging. Face detection processing for detecting a human face from the image is performed (step S23). The control unit 11 determines whether or not there is a person around the vehicle 1 according to whether or not a person's face is detected by the face detection process of the captured image processing unit 12 (step S24). If it does not exist (S24: NO), the process returns to step S21, and the above process is repeated.

  When the face is detected by the face detection process and it is determined that there is a person (S24: YES), the control unit 11 obtains information on the smart key possessed by the user from the door lock ECU 32 through in-house communication by the in-vehicle communication unit 16. It is acquired (step S25), and it is determined whether or not the smart key possessed by the user exists within a predetermined range from the vehicle 1 (step S26). When the smart key exists within the predetermined range (S26: YES), the control unit 11 returns the process to step S21 without performing a warning, and repeats the above-described process.

  When the smart key does not exist within the predetermined range (S26: NO), the control unit 11 determines that the person imaged by the camera 2 is a suspicious person, and according to the imaging position of the suspicious person in the captured image of the camera 2. Then, position determination processing is performed to determine the position of the suspicious person around the vehicle 1 (step S27). Next, the control unit 11 gives a process to rotate the projector 3 in the horizontal direction toward the window of the vehicle 1 corresponding to the position of the suspicious person by giving an instruction to the rotation control unit 13 according to the result of the position determination process. (Step S28), and a warning image is projected onto the transmissive screen 4 attached to the corresponding window (Step S29). Further, the control unit 11 sends an image captured by the camera 2 to the wireless communication unit 18 and transmits the image to the portable communication device 40, thereby making a wireless report to the user who owns the portable communication device 40 (step S30). ). Then, the control part 11 returns a process to step S21, and performs the above-mentioned process repeatedly. Moreover, when it determines with the lock | rock of the door of the vehicle 1 having been cancelled | released in step S21 (S21: YES), the control part 11 complete | finishes the process which gives a warning with respect to a suspicious person's approach.

  The in-vehicle security device according to the modified example of the above configuration detects the presence of a person around the vehicle 1 based on the captured image of the camera 2 and displays a warning image without using a sensor or the like that detects vibration. Since the suspicious person can be detected and warned before the vibration related to the crime is given to the vehicle 1, the suspicious person can be warned reliably, and the crime against the vehicle 1 can be It can prevent more reliably. In addition, when the smart key is within a predetermined range from the vehicle 1, the smart key is configured so that no warning is given, so that the smart key can be used even when the in-vehicle security device does not have a function of performing face authentication processing. Can be excluded from warnings.

  In this modification, when a suspicious person is detected from an image captured by the camera 2, a warning image is displayed by the projector 3 and wireless notification to the portable communication device 40 is performed by the wireless communication unit 18. However, the present invention is not limited to this.

1 vehicle 2 camera (imaging means)
3. Projector (warning means, image projection means)
4 Transmission screen (warning means)
5 Speaker (Warning means, voice output means)
10 ECU
11 Control unit (authentication means)
12 Captured image processing unit (determination means, face detection means)
13 Rotation control part (displacement means)
14 Projected image processing unit 15 Audio signal output unit (audio output means)
16 In-car communication part 17 Storage part (storage means)
18 Wireless communication unit (warning means, communication means)
21 Rotating mechanism (displacement means)
31 IG switch 32 Door lock ECU
40 portable communication device 50 authentication information (storage means)
100 people

Claims (8)

An imaging means mounted on the vehicle for imaging outside the vehicle;
Determination means for determining whether or not a person is included in an image captured by the imaging means;
An in-vehicle security device comprising: warning means for giving a warning when it is determined by the determining means that a person is included. A transmissive screen disposed in a window of the vehicle;
Image projection means mounted inside the vehicle and projecting an image onto the transmission screen;
The in-vehicle security device according to claim 1, wherein the warning unit projects a warning image onto the transmissive screen by the image projection unit. And a displacement means for displacing the projected position of the image by the image projection means in accordance with the position of the person in the image when the determination means determines that a person is included in the image. The in-vehicle crime prevention device according to claim 2, A face detecting unit for detecting a human face from the image captured by the imaging unit;
The in-vehicle security device according to any one of claims 1 to 3, wherein the determination unit performs a determination according to a detection result of the face detection unit. Storage means for storing one or more people's faces;
Authentication means for determining whether the face detected by the detection means is the face of the same person as the face stored in the storage means;
The warning means determines by the authentication means that the face of the person is the same person's face as the face stored in the storage means even when the determination means determines that a person is included. The in-vehicle security device according to claim 4, wherein a warning is not given when the warning is issued. It further comprises audio output means for outputting audio,
6. The in-vehicle security device according to claim 5, wherein the warning means outputs a warning sound by the voice output means. A communication means for performing wireless communication with other devices outside the vehicle;
The in-vehicle security device according to any one of claims 1 to 6, wherein the warning unit is configured to report to the other device by the communication unit. The in-vehicle security device according to claim 7, wherein the warning unit transmits an image captured by the imaging unit when the communication unit makes a report to the other device.

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