Patent Publication Number: US-11037442-B2

Title: System, system control method, and information providing server

Description:
BACKGROUND 
     1. Field 
     The present disclosure relates to a system for assisting driving of an automobile, a system control method for assisting driving of the automobile, and an information providing server for assisting driving of the automobile. 
     2. Description of the Related Art 
     Currently, there is a demand for technology for suppressing the occurrence of a serious accident due to dangerous driving, and technology for detecting dangerous driving of a host vehicle is known as related art technology. For example, Japanese Unexamined Patent Application Publication No. 2018-112892 discloses technology aimed at improving preventive safety in which a driver of the own vehicle performs self-defense by paying attention to whether or not drivers of the other vehicles are habitual violent drivers. 
     Specifically, a driving assistance device disclosed in Japanese Unexamined Patent Application Publication No. 2018-112892 captures images of other vehicles that travel behind the host vehicle and determines whether or not the other vehicles are in violent driving states with respect to the host vehicle based on the captured images. Further, when the violent driving state is continuous, information on the other vehicles are provided to the driver of the host vehicle. 
     However, the technology as disclosed in Japanese Unexamined Patent Application Publication No. 2018-112892 is not technology based on the viewpoint of avoiding the driver of the vehicle from becoming a target of violent driving in advance. Therefore, there arises a problem that it is hard to avoid a driver from being damaged by dangerous driving in advance. 
     One aspect of the present disclosure has been made in view of the above problems, and the purpose is to allow a driver to recognize a place where dangerous driving is likely to occur, and to reduce the driver&#39;s damage from dangerous driving. 
     SUMMARY 
     (1) According to an aspect of the present disclosure, there is provided a system including: an information processing device that acquires location information indicating a location where dangerous driving occurred, which is determined from imaged data obtained by imaging a traveling vehicle; an information providing server that generates dangerous area information indicating a dangerous area specified according to a plurality of pieces of the location information acquired from the information processing device; and a display device that displays the dangerous area indicated by the dangerous area information on a map. 
     (8) According to another aspect of the present disclosure, there is provided a system control method including: a location information acquisition step for acquiring location information indicating a location where dangerous driving occurred that is determined from imaged data obtained by imaging a traveling vehicle; a generation step for generating dangerous area information indicating a dangerous area specified according to a plurality of pieces of the location information acquired in the location information acquisition step; and a display step for displaying a map on which the dangerous area is indicated using the dangerous area information. 
     (15) According to still another aspect of the present disclosure, there is provided an information providing server including: an acquisition unit that acquires location information indicating a location where dangerous driving occurred; a dangerous area specification unit that generates dangerous area information indicating a dangerous area specified according to a plurality of pieces of the location information; and a transmission unit that transmits the dangerous area information to an external device. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a block diagram showing an example of a major part configuration of a cloud server according to Embodiment 1 of the present disclosure; 
         FIG. 2  is a diagram showing an example of a dangerous area display system  1  according to Embodiment 1 of the present disclosure; 
         FIG. 3  is a diagram showing an example of an image capturing range R by an in-vehicle camera according to Embodiment 1 of the present disclosure; 
         FIG. 4  is a block diagram showing an example of a major part configuration of the in-vehicle camera and an information processing device according to Embodiment 1 of the present disclosure; 
         FIG. 5  is a block diagram showing an example of a major part configuration of a display device according to Embodiment 1 of the present disclosure; 
         FIG. 6  is a flowchart showing an example of a processing flow in the information processing device according to Embodiment 1 of the present disclosure; 
         FIG. 7  is a flowchart showing an example of a processing flow in the cloud server according to Embodiment 1 of the present disclosure; 
         FIG. 8  is a flowchart showing an example of a processing flow in the display device according to Embodiment 1 of the present disclosure; 
         FIGS. 9A and 9B  are diagrams showing an example of a display image displayed by the display device according to Embodiment 1 of the present disclosure; 
         FIG. 10  is a diagram showing an example of a display image displayed by a car navigation according to Embodiment 2 of the present disclosure; 
         FIG. 11  is a block diagram showing an example of a major part configuration of the car navigation according to Embodiment 2 of the present disclosure; and 
         FIG. 12  is a flowchart showing an example of a processing flow in the car navigation according to Embodiment 2 of the present disclosure. 
     
    
    
     DESCRIPTION OF THE EMBODIMENTS 
     Embodiment 1 
     Dangerous Area Display System  1   
       FIG. 2  is a diagram showing an example of a dangerous area display system  1  according to Embodiment 1. The dangerous area display system  1  specifies a dangerous area based on location information indicating a location where dangerous driving occurred, and displays the dangerous area on a map. As shown in  FIG. 2 , the dangerous area display system  1  includes an information processing device  200 , a cloud server (information providing server)  5 , and a display device  6 . 
     The information processing device  200  determines whether or not dangerous driving occurred based on imaged data obtained by imaging a traveling vehicle. When the information processing device  200  determines that the dangerous driving occurred, the information processing device  200  acquires location information indicating a location where the dangerous driving occurred. In the example shown in  FIG. 2 , the information processing device  200  is mounted on an in-vehicle camera of an automobile  2  or  2   a . In the present embodiment, the automobile  2  is a vehicle other than an automobile that is damaged by dangerous driving. The automobile  2   a  is an automobile that is damaged by dangerous driving.  FIG. 3  is a diagram showing an example of an image capturing range R by the in-vehicle camera  20  mounted on the automobile  2 . In the example shown in  FIG. 3 , an example in which the in-vehicle camera  20  mounted on the automobile  2  images a violent driving that is dangerous driving by an automobile  2   b  with respect to the automobile  2   a , is shown. Further, an image capturing device for imaging dangerous driving and the information processing device  200  may be installed on a utility pole, a building, or the like. 
     In other words, the imaged data is imaged data captured by at least one of an image capturing device installed in a vehicle damaged by dangerous driving and an image capturing device installed in a location other than the vehicle damaged by the dangerous driving. 
     When the image capturing device for imaging dangerous driving and the information processing device  200  are mounted on an automobile that is damaged by the dangerous driving, it is possible to image the detailed behavior of the vehicle that is performing the dangerous driving. Further, when the image capturing device for imaging dangerous driving and the information processing device  200  are installed at the location other than the automobile that is damaged by the dangerous driving, the entire vehicle that is performing the dangerous driving can be captured. According to the above configuration, the precision of determination of the presence or absence of an occurrence of dangerous driving can be improved. 
     The information processing device  200  determines whether or not dangerous driving occurred based on imaged data captured by the camera  21  included in the in-vehicle camera. In the example shown in  FIG. 2 , when the information processing device  200  determines that the dangerous driving occurred, the information processing device  200  receives a global positioning system (GPS) signal or the like from a navigation satellite  31  using a satellite navigation system  3  to acquire the location information. 
     The information processing device  200  outputs the acquired location information to a cloud server  5 . For example, a dangerous area display system  1  includes a plurality of information processing devices  200 , and a cloud server  5  receives location information acquired by each information processing device  200 . 
     The cloud server  5  specifies a dangerous area (a section with a lot of dangerous driving and an area with a lot of dangerous driving) according to a plurality of pieces of location information received from the information processing device  200 , and generates dangerous area information indicating the dangerous area. The cloud server  5  outputs the dangerous area information to the display device  6 . The display device  6  displays the dangerous area indicated by the dangerous area information on a map. 
     For example, the information processing device  200 , the cloud server  5 , and the display device  6  may be connected to each other in communication via a wide area communication network  4 . Further, the information processing device  200  may communicate with the cloud server  5  via a relay device such as a smartphone  7 . The information processing device  200  and the smartphone  7  may be connected to each other in communication via a short-distance communication network such as Bluetooth (registered trademark). 
     According to the configuration, a user can recognize a dangerous area where dangerous driving is likely to occur by confirming the dangerous area displayed on the display device  6 . For example, the user avoids passing through areas where dangerous driving is likely to occur, so that damage from dangerous driving by other vehicles can be reduced. 
     Configuration of in-Vehicle Camera  20   
     Next, an example of the configuration of the in-vehicle camera  20  will be described.  FIG. 4  is a block diagram showing an example of a major part configuration of the in-vehicle camera  20  and the information processing device  200 . As shown in  FIG. 4 , the in-vehicle camera  20  includes a camera  21 , a video storage unit  22 , and an information processing device  200 . 
     The in-vehicle camera  20  may be, for example, a drive recorder, a smartphone, or the like, and is not particularly limited as long as it can image the surroundings of an automobile. 
     The camera  21  images the surroundings of the automobile on which the in-vehicle camera  20  is mounted. For example, a complementary metal oxide semiconductor (CMOS) image sensor, a changed coupled device (CCD) image sensor, or the like may be applied to the camera  21 . 
     The video storage unit  22  stores video data (imaged data) captured by the camera  21 . For example, a video used for a determination of the dangerous driving by the information processing device  200  may be used for the user to visually recognize the dangerous driving after the determination. Further, only video data for a predetermined length of time including a video at the time when it is determined that dangerous driving occurred may be stored in the video storage unit  22 . 
     Information Processing Device  200   
     As shown in  FIG. 4 , the information processing device  200  includes a control unit  201 , a storage unit  202 , a location information reception unit  203 , a clock  204 , and a communication unit  205 . 
     Control Unit  201   
     The control unit  201  includes a central processing unit (CPU), a random access memory (RAM), a read only memory (ROM), and the like, and controls each component according to information processing. The control unit  201  includes a video acquisition unit  2011 , a vehicle detection unit  2012 , a dangerous driving determination unit  2013 , and a dangerous driving information acquisition unit  2014 . 
     Video Acquisition Unit  2011   
     The video acquisition unit  2011  acquires video data captured by the camera  21  and outputs the video data to the vehicle detection unit  2012 . 
     Vehicle Detection Unit  2012   
     The vehicle detection unit  2012  detects a vehicle shown in a video captured by the camera  21 . The vehicle detection unit  2012  only desires to be able to detect the vehicle from the video, and a detection method is not particularly limited. For example, the vehicle detection unit  2012  may detect the vehicle from the video by pattern recognition or the like. 
     Dangerous Driving Determination Unit  2013   
     The dangerous driving determination unit  2013  determines whether or not the vehicle detected by the vehicle detection unit  2012  is performing dangerous driving based on a dangerous driving determination model  2021  stored in the storage unit  202 . When the dangerous driving determination unit  2013  determines that the vehicle detected by the vehicle detection unit  2012  is performing the dangerous driving, the dangerous driving determination unit  2013  outputs a signal indicating that the dangerous driving occurred, to the dangerous driving information acquisition unit  2014 . 
     Dangerous Driving Determination Model  2021   
     Here, a dangerous driving determination model  2021  will be described. In the present embodiment, the information processing device  200  may generate a dangerous driving determination model  2021  that is a teacher model by machine learning. A known algorithm such as deep learning, which is known technology, may be used for the machine learning. 
     Specifically, a positive example of dangerous driving is captured in advance using the camera  21  or the like, and the dangerous driving determination model  2021  is generated by executing the machine learning using the corresponding imaged data. For example, the information processing device  200  is configured to model a case where an inter-vehicle distance of a vehicle shown in a video is equal to or less than a predetermined distance as a positive example of violent driving. In a case where the automobile damaged by dangerous driving is a host vehicle, the “inter-vehicle distance” is an inter-vehicle distance between the host vehicle and another vehicle shown in the video. Further, in a case where the automobile damaged by dangerous driving is a vehicle other than the host vehicle, the above-mentioned “inter-vehicle distance” is an inter-vehicle distance between a first other vehicle shown in the video and a second other vehicle shown in a different video from the first other vehicle. 
     The information processing device  200  may generate a teacher model that is a dangerous driving determination model  2021  for each type of dangerous driving. For example, the information processing device  200  is configured to model positive examples of driving such as meandering driving, sudden steering, speed limit excess, and the like as types of dangerous driving based on predetermined criteria. 
     That is, the dangerous driving determination unit  2013  determines the type of dangerous driving from the imaged data. The dangerous driving determination unit  2013  may output a signal indicating the determined type of dangerous driving to the dangerous driving information acquisition unit  2014 . 
     Dangerous Driving Information Acquisition Unit  2014   
     When the dangerous driving information acquisition unit  2014  receives a signal indicating that the dangerous driving occurred from the dangerous driving determination unit  2013 , the dangerous driving information acquisition unit  2014  receives, for example, a GPS signal as location information based on the satellite navigation system via the location information reception unit  203 . Thereby, the longitude and latitude on the earth can be acquired as location information indicating the current location. The location information is handled as location information indicating a location where the dangerous driving occurred. 
     When the dangerous driving information acquisition unit  2014  receives a signal indicating that dangerous driving occurred from the dangerous driving determination unit  2013 , the dangerous driving information acquisition unit  2014  acquires time information indicating the date-and-time at the current time from the clock  204 . The time information is handled as time information indicating the date-and-time when the dangerous driving occurred. 
     The dangerous driving information acquisition unit  2014  outputs a signal indicating the location information, time information, and type of dangerous driving to the cloud server  5  via the communication unit  205 . Note that the location information, time information, and signal indicating the type of dangerous driving may be transmitted at predetermined intervals, or may be transmitted when an engine of the automobile on which the in-vehicle camera  20  is mounted is turned off. 
     Location Information Reception Unit  203   
     A GPS signal or the like is received as the location information based on the satellite navigation system, and the signal is output to the dangerous driving information acquisition unit  2014 . 
     Clock  204   
     The clock  204  measures the date-and-time. According to the instruction of the dangerous driving information acquisition unit  2014 , the measured date-and-time is output to the dangerous driving information acquisition unit  2014 . 
     Communication Unit  205   
     The communication unit  205  communicates with an external device via a wide area communication network  4  or the like. In the present embodiment, in particular, the communication unit  205  communicates with the cloud server  5 . 
     Configuration of Cloud Server  5   
     Next, the configuration of the cloud server  5  will be described.  FIG. 1  is a block diagram showing an example of a major part configuration of the cloud server  5 . As shown in  FIG. 1 , the cloud server  5  includes a communication unit  51 , a control unit  52 , and a storage unit  53 . 
     Communication Unit  51   
     The communication unit  51  communicates with an external device via a wide area communication network  4  or the like. In the present embodiment, in particular, the communication unit  51  communicates with a plurality of information processing devices  200  and the display device  6 . 
     Control Unit  52   
     The control unit  52  includes a CPU, a RAM, a ROM, and the like, and controls each component according to information processing. The control unit  52  includes an information acquisition unit (acquisition unit)  521 , a dangerous road determination unit (dangerous area specification unit)  522 , and a dangerous road information transmission control unit (transmission unit)  523 . 
     Information Acquisition Unit  521   
     The information acquisition unit  521  acquires the signal indicating the location information of the dangerous driving, the signal indicating the time information of the dangerous driving, and the signal indicating the type of the dangerous driving, which are output from the plurality of information processing devices  200  via the communication unit  51 . When the information acquisition unit  521  acquires each information above, the information acquisition unit  521  updates the dangerous driving occurrence information  531  indicating the location, time, and type of the dangerous driving that occurred. The dangerous driving occurrence information  531  is stored in the storage unit  53 , and the dangerous driving occurrence information (location, time, and type) acquired in the past from the information processing device  200  is shown. When the dangerous driving occurrence information  531  is updated, the information acquisition unit  521  outputs a signal indicating that the dangerous driving occurrence information  531  is updated to the dangerous road determination unit  522 . 
     Dangerous Road Determination Unit  522   
     The dangerous road determination unit  522  specifies (determines) a dangerous area according to the plurality of pieces of the location information of dangerous driving. The dangerous road determination unit  522  generates dangerous road information (dangerous area information)  533  indicating the specified dangerous area. The dangerous road determination unit  522  may generate and update the dangerous road information  533  using a reception of a signal indicating that the dangerous driving occurrence information  531  is updated as a trigger. The generated dangerous road information  533  is stored in the storage unit  53 . The dangerous area indicated by the dangerous road information  533  is mapped to a map displayed to a user. 
     The dangerous road determination unit  522  determines whether or not the road shown in the map  532  stored in the storage unit  53  is a dangerous area. For example, the dangerous road determination unit  522  maps the location where the dangerous driving indicated by the dangerous driving occurrence information  531  occurred on the map  532 . Then, the dangerous road determination unit  522  may rank the degree of danger in the area according to the number of dangerous driving occurrences in the predetermined area on the map  532 . For example, the degree of danger of the area may be ranked in two stages, which are dangerous or not dangerous. Moreover, the degree of danger of the area may be ranked with a plurality of stages. The dangerous road information  533  may include the rank of each dangerous area. 
     For example, when the number of dangerous driving occurrences is equal to or greater than a predetermined number in a section where the major road distance is 1 km, the dangerous road determination unit  522  may determine that the section is a dangerous area (dangerous section). Further, when a determination target of the dangerous area is a local road, the determination target of the dangerous area may be an area or the like having a radius of  500   m  instead of a road zone. 
     In other words, according to the type of road that is the dangerous driving occurrence location, the range of the dangerous area is decided as a road section or a peripheral area including the road. According to the above configuration, the range of the dangerous area specified according to the type of road where dangerous driving occurred can be changed. 
     Further, the dangerous road determination unit  522  may specify a dangerous area for each type of dangerous driving. Moreover, the range specified as a dangerous area may be changed according to the type of dangerous driving. For example, when the dangerous driving is caused by speed limit excess, the vehicle performing the dangerous driving is likely to cause a danger in a wide range. Therefore, when the dangerous driving is caused by speed limit excess, the dangerous area may be specified from the location where the dangerous driving occurred to a location provided with a predetermined interval. 
     Further, the dangerous road determination unit  522  may specify the dangerous area according to the location where the dangerous driving occurred in a predetermined period, using the dangerous driving occurrence time indicated by the dangerous driving occurrence information  531 . 
     For example, the dangerous area may be specified based on the location of dangerous driving that occurred within a period from the current time to one year ago. According to the above configuration, it is possible to specify a dangerous area in consideration of the recent trend of dangerous driving occurrence. 
     Further, the predetermined period may be a specific period such as a specific time zone (night time) or a large consecutive holiday period. According to above configuration, the area where dangerous driving is likely to occur in a specific period can be made into a dangerous area. 
     Update of Dangerous Road Information  533   
     When the information acquisition unit  521  newly acquires location information, the dangerous road determination unit  522  determines a dangerous area for the area including the location indicated by the location information. In the above determination, when there is a change or the like in ranking of the degree of danger of the area, the dangerous area information is updated according to the determination result. 
     Dangerous Road Information Transmission Control Unit  523   
     The dangerous road information transmission control unit  523  transmits dangerous road information  533  to the display device  6  via the communication unit  51  in response to a request from the display device  6 . Note that when the dangerous road information  533  is already transmitted to the display device  6  in the past, only an updated portion of dangerous road information  533  from the dangerous road information  533  included in the display device  6  may be transmitted. Further, only dangerous road information  533  within a predetermined range from a place where the display device  6  is located may be transmitted. In this case, the dangerous road information transmission control unit  523  may determine whether or not there is a dangerous area in the predetermined range, and may transmit the dangerous road information  533  when the dangerous area exists in the predetermined range. 
     Storage Unit  53   
     The storage unit  53  stores the dangerous driving occurrence information  531 , the map  532 , the dangerous road information  533 , and the like. 
     Configuration of Display Device  6   
     Next, the configuration of the display device  6  will be described.  FIG. 5  is a block diagram showing an example of a major part configuration of the display device  6 . As shown in  FIG. 5 , the display device  6  includes an operation unit  61 , a communication unit  62 , a display unit  63 , a control unit  64 , and a storage unit  65 . 
     Operation Unit  61   
     The operation unit  61  receives a user operation. In the present embodiment, in particular, an operation for displaying a map on which a dangerous area is mapped is received. 
     Communication Unit  62   
     The communication unit  62  communicates with an external device via a wide area communication network  4  or the like. In the present embodiment, in particular, the communication unit  62  communicates with the cloud server  5 . 
     Display Unit  63   
     The display unit  63  is configured to display an image, and is realized by, for example, a liquid crystal display including a liquid crystal panel and a backlight unit. In the present embodiment, in particular, an image of a map on which a dangerous area is mapped is displayed. 
     Control Unit  64   
     The control unit  64  includes a CPU, a RAM, a ROM, and the like, and controls each component according to information processing. The control unit  64  includes an operation reception unit  641 , a dangerous road information acquisition unit  642 , and a display image generation unit  643 . 
     Operation Reception Unit  641   
     The operation reception unit  641  receives a user operation for displaying a map on which the dangerous area is mapped via an operation unit  61 . When the operation is received, the cloud server  5  is requested to transmit the dangerous road information  533  via the communication unit  62 . 
     Dangerous Road Information Acquisition Unit  642   
     The dangerous road information acquisition unit  642  acquires the dangerous road information  533  via the communication unit  62  and stores the acquired dangerous road information  533  in the storage unit  65 . 
     Note that when the display device  6  is already received the dangerous road information  533  in the past, only an updated portion of dangerous road information  533  from the dangerous road information  533  included in the display device  6  may be transmitted. In this case, the dangerous road information acquisition unit  642  updates the dangerous road information  533  stored in the storage unit  65  using the updated portion of the dangerous road information  533  which is already received. According to the above configuration, updating of dangerous area information and transmission of dangerous area information can be performed efficiently. 
     When the dangerous road information acquisition unit  642  stores the dangerous road information  533  in the storage unit  65  or instructs the display image generation unit  643  to generate a display image when the dangerous road information  533  stored in the storage unit  65  is updated. 
     Display Image Generation Unit  643   
     The display image generation unit  643  generates an image of map on which the dangerous area is mapped using dangerous road information  533  stored in the storage unit  65  and a map  652  that is map data, and causes the display unit  63  to display the image. 
     For example, the display image generation unit  643  may generate an image in which the dangerous area indicated by the dangerous road information  533  is displayed on a map for each type of dangerous driving. 
     According to the above configuration, a user can recognize a dangerous area where each kind of dangerous driving is likely to occur by confirming the image. 
     According to the configuration of the cloud server  5  described above, for example, a user can recognize a dangerous area where dangerous driving is likely to occur via the display device  6 . Therefore, it can reduce that a user receives a damage from the dangerous driving due to other vehicles. 
     Processing Flow of Dangerous Area Display System  1   
     Next, an example of the processing flow of the dangerous area display system  1  will be described. 
     Processing Flow in Information Processing Device  200   
       FIG. 6  is a flowchart showing an example of a processing flow in the information processing device  200 . As shown in  FIG. 6 , a video acquisition unit  2011  acquires video data (S 1 ). Subsequently, the dangerous driving determination unit  2013  determines (detects) dangerous driving of other vehicles (S 2 ). When it is determined that the dangerous driving occurred (YES in S 2 ), the dangerous driving information acquisition unit  2014  acquires the location information where the dangerous driving occurred, the time information when the dangerous driving occurred, and the type of the dangerous driving that occurred (S 3 : location information acquisition step, time information acquisition step, type determination step), and transmits the acquired information and type to the cloud server  5  (S 4 ), thereafter the process is ended. Note that when it is determined that no dangerous driving occurred (NO in S 2 ), the process returns to S 1 . 
     Processing Flow in Cloud Server  5   
     Next, the processing flow in the cloud server  5  will be described.  FIG. 7  is a flowchart showing an example of a processing flow in the cloud server  5 . As shown in  FIG. 7 , the information acquisition unit  521  acquires location information, time information, and the type of dangerous driving that occurred (S 11 ). Subsequently, the information acquisition unit  521  updates the dangerous driving occurrence information  531  using the acquired information (S 12 ). Subsequently, the dangerous road determination unit  522  determines whether or not there is a dangerous area by specifying the dangerous area (S 13 ). When there is a dangerous area (YES in S 13 ), the dangerous road determination unit  522  generates or updates the dangerous road information  533  (S 14 : generation step, updating step), and the process is ended. When there is no dangerous area (NO in S 13 ), the process is ended. 
     Processing Flow in Display Device  6   
     Next, the processing flow in the display device  6  will be described.  FIG. 8  is a flowchart showing an example of a processing flow in the display device  6 . As shown in  FIG. 8 , the dangerous road information acquisition unit  642  acquires the dangerous road information  533  from the cloud server  5  (S 21 ). Subsequently, the display image generation unit  643  generates a display image (S 22 ), and causes the display unit  63  to display the display image (S 23 : display step). 
     Example of Display Image 
     Next, a display image displayed on the display unit  63  of the display device  6  will be described with reference to  FIG. 9 .  FIGS. 9A and 9B  are diagrams which show an example of a display image showing a map on which a dangerous area displayed by the display device  6  is mapped. 
     A display image P 1  shown in  FIG. 9A  is obtained by mapping the dangerous area indicated by the dangerous road information  533  on the map. For example, in the display image, each dangerous area may be displayed in different colors according to the rank of the dangerous area determined by the dangerous road determination unit  522 . As shown in the display image P 1 , for the dangerous area in major roads, the corresponding section of the major road is displayed by color, and for the dangerous area in local roads, the corresponding area is displayed by color. 
     Further, the display image may indicate the type of dangerous driving occurring in the dangerous area. 
     A display image P 2  shown in  FIG. 9B  is obtained by mapping a point where dangerous driving occurred on a map as it is. That is, the dangerous road information  533  may include location information indicating the location where the dangerous driving occurred. 
     According to the above configuration, a driver can be alerted before the driver receives a damage from the dangerous driving such as violent driving by displaying to the driver a location where the dangerous driving occurred and a map image on which the dangerous area or the like with high frequency of occurrence of the dangerous driving is mapped. 
     Embodiment 2 
     Another embodiment of the present disclosure will be described below. For the convenience of explanation, regarding the member which has the same function as the member demonstrated in the above embodiment, the same reference sign is appended and the description is not repeated. 
     Dangerous Area Display System  1   
     The dangerous area display system  1  according to Embodiment 2 includes an information processing device  200 , a cloud server  5 , and a car navigation system (display device, car navigation device)  6   a . Since the information processing device  200  and the cloud server  5  are the same as those described in Embodiment 1, the description thereof will not be repeated. 
     The car navigation  6   a  is a car navigation device, and displays a route that does not pass through the dangerous area specified by the cloud server  5  as a route to the destination.  FIG. 10  is a diagram showing an example of a display image displayed by the car navigation  6   a . As shown in  FIG. 10 , in the display image P 3 , a route avoiding the dangerous zone (area) is displayed as a recommended route. Note that, on the display image P 3  shown in  FIG. 10 , for the sake of convenience of explanation, the route passing through the dangerous zone is indicated by a broken line, but it is assumed that the route indicated by the broken line is not displayed in the display image displayed by the car navigation  6   a . According to the above configuration, it can reduce that a user receives the damage of dangerous driving by other vehicles. 
     Configuration of Car Navigation  6   a    
     Next, the configuration of the car navigation  6   a  will be described.  FIG. 11  is a block diagram showing an example of a major part configuration of the car navigation  6   a . As shown in  FIG. 11 , the car navigation  6   a  includes an operation unit  61 , a communication unit  62 , a display unit  63 , a control unit  64   a , and a storage unit  65 . Note that the configuration of the communication unit  62  and the display unit  63  is the same as the configuration described in Embodiment 1, and thus description thereof will not be repeated. 
     Operation Unit  61   
     The operation unit  61  receives a user operation. In the present embodiment, in particular, an operation input for a route search including an operation input for a destination or the like is received. 
     Control Unit  64   a    
     The control unit  64   a  includes a CPU, a RAM, a ROM, and the like, and controls each component according to information processing. The control unit  64   a  includes an operation reception unit  641 , a dangerous road information acquisition unit  642 , a display image generation unit  643   a , a route search unit  644   a , and a dangerous area determination unit  645   a.    
     Operation Reception Unit  641   
     The operation reception unit  641  receives a user operation for route search via the operation unit  61 . When the operation is received, the cloud server  5  is requested to transmit the dangerous road information  533  via the communication unit  62 . 
     Dangerous Road Information Acquisition Unit  642   
     Here, only a configuration different from the dangerous road information acquisition unit  642  described in Embodiment 1 will be described. When the dangerous road information  533  is stored in the storage unit  65  or the dangerous road information  533  stored in the storage unit  65  is updated, the dangerous road information acquisition unit  642  according to the present embodiment instructs the route search unit  644   a  to search for a route. 
     Route Search Unit  644   a    
     The route search unit  644   a  searches for a route from the destination and current location input by a user. For example, the route search unit  644   a  may search for a route to the destination from the destination and the current location input by the user with reference to a map  652  that is the map data stored in the storage unit  65 . The route search unit  644   a  outputs information indicating the searched route to the dangerous area determination unit  645   a.    
     Dangerous Area Determination Unit  645   a    
     The dangerous area determination unit  645   a  determines whether or not there is a dangerous area on the route searched by the route search unit  644   a  using the dangerous road information  533  stored in the storage unit  65 , the map  652  that is map data, and the like. In other words, the dangerous area determination unit  645   a  determines whether or not the route searched by the route search unit  644   a  is a route that passes through the dangerous area. When there is a dangerous area on the route searched by the route search unit  644   a , the dangerous area determination unit  645   a  instructs the route search unit  644   a  to search for another route. When there is no dangerous area on the route searched by the route search unit  644   a , the dangerous area determination unit  645   a  outputs a signal indicating the route to the display image generation unit  643   a.    
     Display Image Generation Unit  643   a    
     The display image generation unit  643   a  generates a display image on which a route avoiding the dangerous zone (area) is displayed using the route indicated by the signal received from the dangerous area determination unit  645   a , the dangerous road information acquisition unit  642  and the map  652  stored in the storage unit  65 , and the like, and causes the display unit  63  to display the display image. For example, a dangerous zone (area) may be displayed on the display image generated by the display image generation unit  643   a.    
     Processing Flow in Car Navigation  6   a    
     Next, a processing flow in the car navigation  6   a  will be described.  FIG. 12  is a flowchart showing an example of a processing flow in the car navigation  6   a . As shown in  FIG. 12 , the dangerous road information acquisition unit  642  acquires the dangerous road information  533  from the cloud server  5  (S 21 ). Subsequently, the route search unit  644   a  searches for a recommended route to the destination (S 31 ). The route search method is not particularly limited, and known technology can be used. Subsequently, the dangerous area determination unit  645   a  refers to the dangerous road information  533 , and determines whether or not the recommended route searched in step S 31  is a route that passes through the dangerous section or the dangerous area (S 32 ). When the recommended route is not a route that passes through the dangerous section or the dangerous area (NO in S 32 ), the display image generation unit  643   a  generates a display image (S 22 ) and causes the display unit  63  to display the display image (S 23 ), thereafter the process is ended. When the recommended route is a route that passes through a dangerous section or a dangerous area (YES in S 32 ), the process returns to S 31 . 
     Implementation Example by Software] 
     The control blocks (control units  201 ,  52 ,  64 , and  64   a ) of the information processing device  200 , the cloud server  5 , the display device  6 , and the car navigation  6   a  device  10  may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or may be realized by software. 
     In the latter case, the information processing device  200 , the cloud server  5 , the display device  6 , and the car navigation  6   a  device  10  include a computer that executes instructions of a program that is software that realizes each function. The computer includes, for example, at least one processor (control device) and at least one computer-readable recording medium storing the program. Further, in the computer, the processor reads the program from the recording medium and executes the program, thereby the object of the present disclosure can be achieved. As the processor, for example, a central processing unit (CPU) can be used. As the recording medium, a “non-temporary tangible medium” such as a read only memory (ROM), a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used. Further, a random access memory (RAM) or the like for expanding the program may be further provided. The program may be supplied to the computer via any transmission medium (such as a communication network or a broadcast wave) that can transmit the program. Note that one aspect of the present disclosure can also be realized in the form of a data signal embedded in a carrier wave, in which the program is embodied by electronic transmission. 
     SUMMARY 
     A system (dangerous area display system  1 ) according to Aspect  1  of the present disclosure includes an information processing device ( 200 ) that acquires location information indicating a location where dangerous driving occurred, which is determined from imaged data obtained by imaging a traveling vehicle, an information providing server (cloud server  5 ) that generates dangerous area information (dangerous road information  533 ) indicating a dangerous area specified according to a plurality of pieces of the location information acquired from the information processing device, and a display device (display device  6 , car navigation  6   a ) that displays the dangerous area indicated by the dangerous area information on a map. 
     The system according to Aspect  2  of the present disclosure, in Aspect  1 , the information processing device may acquire time information indicating a date-and-time when the dangerous driving occurred, and the information providing server may specify the dangerous area according to the location information of dangerous driving that occurred in a predetermined period using the time information acquired from the information processing device. 
     The system according to Aspect  3  of the present disclosure, in Aspect  1 , the information processing device may determine a type of the dangerous driving from the imaged data, the information providing server may specify the dangerous area for each type of the dangerous driving determined by the information processing device, and the display device may display the dangerous area on the map for each type of the dangerous driving determined by the information processing device. 
     The system according to Aspect  4  of the present disclosure, in Aspect  1 , the information providing server may decide a range of the dangerous area according to a type of a road at a location indicated by the location information. 
     The system according to Aspect  5  of the present disclosure, in Aspect  1 , the information providing server may update the dangerous area information when the location information is newly acquired, and the display device may update the dangerous area information before update which is held in the display device using an updated portion of the dangerous area information. 
     The system according to Aspect  6  of the present disclosure, in Aspect  1 , the display device may be a car navigation device (car navigation  6   a ), and the display device may display a route that does not pass through the dangerous area as a route to a destination. 
     The system according to Aspect  7  of the present disclosure, in Aspect  1 , the imaged data obtained by imaging the traveling vehicle may be imaged data which is captured by at least one of an image capturing device installed in a vehicle that is damaged by the dangerous driving and an image capturing device installed at a location other than the vehicle that is damaged by the dangerous driving. 
     A system control method according to Aspect  8  of the present disclosure includes a location information acquisition step (S 3 ) for acquiring location information indicating a location where dangerous driving occurred that is determined from imaged data obtained by imaging a traveling vehicle; a generation step (S 14 ) for generating dangerous area information indicating a dangerous area specified according to a plurality of pieces of the location information acquired in the location information acquisition step; and a display step (S 23 ) for displaying a map on which the dangerous area is indicated using the dangerous area information. 
     The system control method according to Aspect  9  of the present disclosure, in Aspect  8 , the system control method may further include a time information acquisition step (S 3 ) for acquiring time information indicating a date-and-time when the dangerous driving occurred, in which the dangerous area may be specified according to the location information of dangerous driving that occurred in a predetermined period using the time information acquired in the time information acquisition step. 
     The system control method according to Aspect  10  of the present disclosure, in Aspect  8 , the system control method may further include a type determination step for determining a type of the dangerous driving from the imaged data, in which the dangerous area may be specified using the type of the dangerous driving determined in the type determination step (S 3 ), and in the display step, the dangerous area may be displayed on a map for each type of the dangerous driving determined in the type determination step. 
     The system control method according to Aspect  11  of the present disclosure, in Aspect  8 , in the generation step, a specified range of the dangerous area may be decided according to a type of a road at a location indicated by the location information. 
     The system control method according to Aspect  12  of the present disclosure, in Aspect  8 , the system control method may further include a step of causing the information providing server to update the dangerous area information when the location information is newly acquired, and a step (S 14 ) of causing a display device to update the dangerous area information before update which is held in the display device, using an updated portion of the dangerous area information. 
     The system control method according to Aspect  13  of the present disclosure, in Aspect  8 , in the display step, a route that does not pass through the dangerous area may be displayed as a route to a destination on a car navigation device. 
     The system control method according to Aspect  14  of the present disclosure, in Aspect  8 , the imaged data obtained by imaging the traveling vehicle may be imaged data which is captured by at least one of an image capturing device installed in a vehicle that is damaged by the dangerous driving and an image capturing device installed at a location other than the vehicle that is damaged by the dangerous driving. 
     An information providing server (cloud server  5 ) according to Aspect  15  of the present disclosure includes an acquisition unit (information acquisition unit  521 ) that acquires location information indicating a location where dangerous driving occurred, a dangerous area specification unit (dangerous road determination unit  522 ) that generates dangerous area information (dangerous road information  533 ) indicating a dangerous area specified according to a plurality of pieces of the location information, and a cloud server (dangerous road information transmission control unit  523 ) that transmits the dangerous area information to an external device (display device  6 ). 
     The present disclosure is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and embodiments obtained by appropriately combining the technical units disclosed in different embodiments are also included in the technical scope of the present disclosure. Furthermore, new technical features can be formed by combining the technical units disclosed in each embodiment. 
     The present disclosure contains subject matter related to that disclosed in U.S. Provisional Patent Application No. 62/796,937 filed in the US Patent Office on Jan. 25, 2019, the entire content of which is hereby incorporated by reference. 
     It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and alterations may occur depending on design requirements and other factors insofar as they are within the scope of the appended claims or the equivalents thereof.