Image management system and image management method

Abstract

To prevent dummy video from being used wrongly, in video captured with a camera.SOLUTION: A video management system comprises: a camera; a management device which obtains video captured with the camera; and an output device which generates a visual change within a field angle of the camera in response to an operation instruction signal. The management device transmits the operation instruction signal to the output device and determines whether the visual change is generated in response to the operation instruction signal in the video obtained from the camera, thereby determining authenticity of the video obtained from the camera.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a video management system and a video management method for managing videos captured by a camera.

Background Art

[0002] Patent Document 1 discloses an image transfer device that transfers an image captured by an in-vehicle camera to an external image diagnostic device.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Consider the video captured by the camera. When a display device for displaying a dummy video is installed in front of the camera lens, the dummy video will be captured by the camera. In this case, the dummy video may be mistakenly used without being noticed.

[0005] One object of the present disclosure is to prevent a situation where a dummy video is mistakenly used with respect to a video captured by a camera.

Means for Solving the Problems

[0006] A first aspect relates to a video management system. The video management system includes a camera, a management device that acquires a video captured by the camera, and an output device that generates a visual change within the viewing angle of the camera in response to an operation instruction signal. The management device transmits an operation instruction signal to the output device, and determines the authenticity of the video acquired from the camera by determining whether a visual change has occurred in response to the operation instruction signal in the video acquired from the camera.

[0007] The second aspect relates to a video management method. The video management method includes: transmitting an operation instruction signal to an output device that generates a visual change within the viewing angle of the camera in response to the operation instruction signal; acquiring the video captured by the camera; and determining the authenticity of the video acquired from the camera by determining whether a visual change has occurred in response to the operation instruction signal in the video.

Advantages of the Invention

[0008] According to the present disclosure, by transmitting an operation instruction signal to the output device, a visual change can be actively caused within the viewing angle of the camera. Then, by determining whether a visual change has occurred in the video captured by the camera, the authenticity of the video can be determined. Specifically, if a visual change occurs as expected in the video according to the operation instruction signal, the video captured by the camera is determined to be a genuine video. On the other hand, if a visual change does not occur as expected in the video according to the operation instruction signal, the video captured by the camera is determined to be a fake video. Therefore, it is possible to prevent the dummy video from being accidentally used.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0010] Embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0011] 1. First Embodiment 1-1. Configuration Example FIG. 1 is a schematic diagram showing a first embodiment in the present disclosure. The video management system in the first embodiment includes a management device 1, a camera 2, and an output device 3.

[0012] The management device 1 includes, for example, one or more processors (hereinafter referred to as processors) that execute various processes, and one or more storage devices (hereinafter referred to as storage devices) that store various information. For example, the processor includes a CPU (Central Processing Unit). Examples of the storage device include a volatile memory, a non-volatile memory, an HDD (Hard Disk Drive), an SSD (Solid State Drive), and the like. The processes performed by the management device may be performed by the processor executing a control program stored in the storage device.

[0013] The camera 2 is a video camera that can capture and record video. Also, the viewing angle 4 shown in FIG. 1 indicates the range that appears in the video when the camera 2 captures an image. Note that the area and position where the camera 2 is installed are not particularly limited.

[0014] The output device 3 is configured to be able to generate a visual change within the viewing angle 4 of the camera 2. In particular, the output device 3 is configured to be able to generate a visual change within the viewing angle 4 of the camera 2 in response to an operation instruction signal from the outside.

[0015] In the first embodiment, the output device 3 is a light-emitting device 3a installed within the viewing angle 4 of the camera 2. The light-emitting device 3a is, for example, an incandescent lamp, a fluorescent lamp, an LED, or the like. The light-emitting device 3a is capable of emitting light, thereby generating a visual change within the viewing angle 4 of the camera 2. In particular, the light-emitting device 3a emits light in response to an operation instruction signal from the outside. The light quantity, color, light-emitting interval, etc. of the light emission may be variable. When the light quantity, color, light-emitting interval, etc. of the light emission are variable, it is possible to specify the light quantity, color, light-emitting interval, etc. by the operation instruction signal.

[0016] The management device 1 can communicate with the camera 2 and acquire the video captured by the camera 2. Further, the management device 1 can communicate with the output device 3 and transmit an operation instruction signal for generating a visual change within the viewing angle 4 of the camera 2 to the output device 3. The management device 1 may periodically transmit the operation instruction signal to the output device 3. The management device 1 may periodically transmit the operation instruction signal to the output device 3. The management device 1 may transmit the operation instruction signal to the output device 3 at random timing. The management device 1 may transmit the operation instruction signal to the output device 3 according to an instruction from the administrator. And, as will be described below, the management device 1 can perform authenticity determination of the video acquired from the camera 2.

[0017] 1-2. Video management method FIG. 2 is a flowchart showing the video management method in the present disclosure.

[0018] First, in step S100, the management device 1 transmits an operation instruction signal for generating a visual change within the viewing angle 4 of the camera 2 to the output device 3. Then, the process proceeds to step S200.

[0019] Next, in step S200, the management device 1 acquires the video captured by the camera 2. Then, the process proceeds to step S300.

[0020] Next, in step S300, the management device 1 determines whether a visual change has occurred in the video acquired in step S200. Specifically, the management device 1 determines whether a visual change has occurred as expected in response to the operation instruction signal in the video. More specifically, the management device 1 determines whether a visual change has occurred in the video within a predetermined time from the transmission of the operation instruction signal. Here, the predetermined time is set to be about the sum of the time required for the communication of the operation instruction signal and the time required for the communication of the video. For example, the predetermined time is 1 second. If it is determined that a visual change has occurred as expected in response to the operation instruction signal (S300: YES), the process proceeds to step S400. On the other hand, if it is determined that a visual change has not occurred as expected in response to the operation instruction signal (S300: NO), the process proceeds to step S410.

[0021] Next, in step S400, the management device 1 determines that the video captured by the camera 2 is a genuine video. Then, the process ends.

[0022] Next, in step S410, the management device 1 determines that the video captured by the camera 2 is a fake video. Then, the process ends.

[0023] 1-3. Operations and Effects According to the present embodiment, by transmitting the operation instruction signal to the output device 3, a visual change can be actively caused within the viewing angle 4 of the camera 2. Then, the management device 1 can determine the authenticity of the video by determining whether a visual change has occurred in the video captured by the camera 2. Specifically, if a visual change has occurred as expected in the video according to the operation instruction signal, it is determined that the video captured by the camera 2 is a genuine video. On the other hand, if a visual change has not occurred as expected in the video according to the operation instruction signal, it is determined that the video captured by the camera 2 is a fake video. Therefore, it is possible to prevent the dummy video from being erroneously used without being noticed.

[0024] 2. Second Embodiment Figure 3 is a schematic diagram showing a second embodiment in the present disclosure. Since the configuration of the video management system in the second embodiment is the same as that in the first embodiment except for the output device 3, descriptions other than the output device 3 are omitted here.

[0025] In the second embodiment, the output device 3 is a display device 3b installed so as to fit within the viewing angle 4. Specifically, the display device 3b displays a specific video or image on the screen in response to an operation instruction signal transmitted from the management device 1. For example, the display device 3b is a digital signage or a monitor. Further, the display device 3b can also change the video or image to be displayed over time.

[0026] As a specific example of the video or image to be displayed on the display device 3b, a public key can be mentioned. The management device 1 stores a paired secret key and public key in the storage device in advance. The management device 1 transmits an operation instruction signal for displaying the public key to the display device 3b. The display device 3b receives the operation instruction signal and displays the public key on the screen. At this time, the display device 3b is installed at a position and orientation where the screen can be clearly photographed by the camera 2. Thereafter, the camera 2 photographs a video so that the display device 3b on which the public key is displayed fits within the viewing angle 4, and transmits the video to the management device 1. The management device 1 collates the public key reflected in the video with the secret key. When the management device 1 determines that the public key and the secret key are a pair, it determines that the photographed video is genuine, and when it determines that the public key and the secret key are not a pair, it determines that the photographed video is fake.

[0027] As a further specific example of the video or image to be displayed on the display device 3b, a two-dimensional code (e.g., QR code (registered trademark)) can be mentioned. The management device 1 transmits an operation instruction signal so as to display a specific two-dimensional code on the display device 3b. The display device 3b displays the two-dimensional code specified by the operation instruction signal on the screen. The camera 2 captures an image such that the two-dimensional code displayed on the screen is within the viewing angle 4, and transmits the captured image to the management device 1. The management device 1 reads the two-dimensional code included in the captured image, and determines whether it matches the two-dimensional code instructed to be displayed on the display device 3b by the operation instruction signal. When the two-dimensional code shown in the image matches the two-dimensional code instructed to be displayed on the display device 3b by the operation instruction signal, the management device 1 determines that the image captured by the camera 2 is genuine, and when they do not match, the management device 1 determines that the image captured by the camera 2 is fake.

[0028] According to the second embodiment, the same effects as those of the first embodiment can be obtained. Further, when a public key and a private key are used or when a two-dimensional code is used, the management device 1 can more accurately determine the authenticity of the captured image.

[0029] 3. Third Embodiment FIG. 4 is a schematic diagram showing the third embodiment in the present disclosure. Since the configuration of the video management system in the third embodiment is the same as that of the first embodiment except for the output device 3, descriptions other than the output device 3 are omitted here.

[0030] In the third embodiment, the output device 3 is a projection device 3c that is installed outside the viewing angle 4 and projects light toward the inside of the viewing angle 4. Specifically, the projection device 3c projects specific light, video, or an image onto the ground, wall surface, or screen within the viewing angle 4 of the camera 2 in response to an operation instruction signal transmitted from the management device 1.

[0031] As a specific example of what the projection device 3c projects within the viewing angle 4 of the camera 2, there are the public key paired with the secret key and the two-dimensional code described in the second embodiment. In the present embodiment, the projection device 3c projects the public key or the two-dimensional code within the viewing angle 4. The projected public key or two-dimensional code is photographed by the camera 2, and the photographed video is transmitted to the management device 1. Since the specific processing of the management device 1 is shown in the second embodiment, it is omitted here.

[0032] According to the third embodiment, the same effects as those of the first embodiment can be obtained. Also, when a public key and a secret key are used or when a two-dimensional code is used, the management device 1 can more accurately determine the authenticity of the photographed video.

[0033] 4. Fourth Embodiment FIG. 5 is a schematic diagram showing a fourth embodiment in the present disclosure. The fourth embodiment can be combined with any of the above-described first to third embodiments.

[0034] In the fourth embodiment, the management device 1 stores a pattern of visual changes in a storage device. An example of the pattern of visual changes is also shown in FIG. 5. In the example shown in FIG. 5, the output device 3 is the light-emitting device 3a (see FIG. 1), and the pattern of visual changes is the light-emitting pattern of the light-emitting device 3a. In the example shown in FIG. 5, the light-emitting device 3a blinks, and the light amount also changes with each emission.

[0035] The management device 1 designates one pattern from among a plurality of patterns. The management device 1 may randomly designate one pattern from among a plurality of patterns. The management device 1 may periodically change the designated pattern. The management device 1 transmits an operation instruction signal including information on the designated pattern to the output device 3. The output device 3 generates a visual change according to the designated pattern included in the operation instruction signal.

[0036] The management device 1 acquires images from the camera 2 and determines whether a visual change has occurred in the images according to a specified pattern. More specifically, the management device 1 determines whether a visual change has occurred in the images according to the specified pattern within a predetermined time from the transmission of the operation instruction signal. Here, the predetermined time is set based on the signal communication time and the duration of the specified pattern. If a visual change has occurred in the images according to the specified pattern within the predetermined time from the transmission of the operation instruction signal, the management device 1 determines that the images captured by the camera 2 are genuine images. On the other hand, if no visual change according to the specified pattern has occurred in the images within the predetermined time from the transmission of the operation instruction signal, the management device 1 determines that the images captured by the camera 2 are fake images.

[0037] According to the fourth embodiment, the same effects as those of the first embodiment can be obtained. Further, by specifying the pattern of the visual change, the management device 1 can more accurately determine the authenticity of the captured images.

[0038] 5. Fifth Embodiment FIG. 6 is a schematic diagram showing the fifth embodiment in the present disclosure. Specifically, FIG. 6 is a schematic diagram when the video management system is introduced into a parking lot corresponding to automatic valet parking.

[0039] The automatic valet parking system is a system in which the vehicle is instructed by the parking management system to automatically drive towards an empty parking space and park automatically. In order to check the situation in the parking lot and the available parking spaces, it is common to install infrastructure cameras in parking lots corresponding to automatic valet parking.

[0040] The management device 1 manages automatic valet parking. The management of automatic valet parking includes the management of the parking lot, the management of the parking status, the management of the vehicles in the parking lot, etc. The management device 1 can communicate with the vehicles in the parking lot and issue various instructions to the vehicles in the parking lot. The management device 1 has the same configuration as in the first embodiment. Also, the management device 1 executes the same processing as in the first embodiment. Furthermore, the management device 1 executes the control of the automatic valet parking of the vehicle.

[0041] The camera 2 captures the state inside the parking lot 5 and transmits the captured video to the management device 1. Specifically, the camera 2 captures the parking lot 5 at a position and angle such that the parking space is within the viewing angle 4, for example, to grasp the available parking spaces or the positions of the vehicles in the parking lot 5.

[0042] The output device 3 is the vehicle 3d parked in the parking lot 5. The vehicle 3d corresponds to automatic valet parking and is managed by the management device 1. In other words, the vehicle 3d can operate according to the instructions transmitted from the management device 1. The vehicle 3d is parked within the viewing angle 4 of the camera 2. Also, the vehicle 3d is equipped with a lighting device. The vehicle 3d receives the operation instruction signal transmitted from the management device 1 and generates a visual change within the viewing angle 4 of the camera 2 by emitting light or flashing the lighting device based on the operation instruction signal.

[0043] According to the fifth embodiment, the same effects as in the first embodiment can be obtained. Furthermore, as the output device 3, the vehicle 3d managed by the management device 1 is used. Therefore, it is not necessary to newly install the output device 3 (for example, the light-emitting device 3a disclosed in the first embodiment) in the parking lot 5 corresponding to the existing automatic valet parking. Therefore, the video management system according to the present disclosure can be introduced at low cost. Also, by preventing the dummy video from being misused, the management device 1 can more safely control the vehicles in the parking lot 5.

Explanation of Reference Numerals

[0044] 1 Management device, 2 Camera, 3 Output device, 4 Field of view angle, 5 Parking lot

Claims

【Claim 1】 It is installed in a parking lot capable of automatic valet parking, and includes a camera that photographs the parking lot, a management device that acquires the video captured by the camera and manages the automatic valet parking, and an output device that generates a visual change within the angle of view of the camera in response to an operation instruction signal and is provided with, The management device, transmits the operation instruction signal to the output device, determines the authenticity of the video acquired from the camera by determining whether or not the visual change has occurred in response to the operation instruction signal in the video acquired from the camera is configured as, The output device is a vehicle parked in the parking lot and present within the angle of view, The management device transmits the operation instruction signal to the vehicle, The vehicle receives the operation instruction signal and generates the visual change within the angle of view using a lighting device provided in the vehicle Video management system.

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