WO2014199452A1 - 情報送信装置、天候状況取得システム、サーバ装置、情報送信方法及びプログラム - Google Patents
情報送信装置、天候状況取得システム、サーバ装置、情報送信方法及びプログラム Download PDFInfo
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- WO2014199452A1 WO2014199452A1 PCT/JP2013/066117 JP2013066117W WO2014199452A1 WO 2014199452 A1 WO2014199452 A1 WO 2014199452A1 JP 2013066117 W JP2013066117 W JP 2013066117W WO 2014199452 A1 WO2014199452 A1 WO 2014199452A1
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- WIPO (PCT)
- Prior art keywords
- information
- wiper
- weather
- weather information
- image
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01W—METEOROLOGY
- G01W1/00—Meteorology
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01W—METEOROLOGY
- G01W1/00—Meteorology
- G01W1/02—Instruments for indicating weather conditions by measuring two or more variables, e.g. humidity, pressure, temperature, cloud cover or wind speed
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/50—Context or environment of the image
- G06V20/56—Context or environment of the image exterior to a vehicle by using sensors mounted on the vehicle
Definitions
- the present invention relates to the technical field of generating and transmitting weather information.
- Patent Document 1 states that it is raining using a rain detection sensor applied to an automatic wiper that automatically operates the wiper during rain, a detection sensor that detects that the wiper is in an operating state, and the like. A technique for generating and transmitting the weather information shown is described.
- the main object of the present invention is to provide an information transmission device and the like capable of appropriately generating weather information with a simple configuration.
- the information transmitting apparatus that moves together with the moving body includes a photographing unit and a weather condition at a photographing place by the photographing unit based on an image of the wiper of the moving body photographed by the photographing unit.
- Weather information generating means for generating the weather information indicating the position
- acquisition means for acquiring the position information of the shooting location
- transmission means for transmitting the weather information and the position information.
- a weather condition acquisition system having an information transmission apparatus that moves together with a mobile body, and a server apparatus that is communicatively connected to the information transmission apparatus, the information transmission apparatus includes a photographing unit, Based on an image of the wiper of the moving body photographed by the photographing means, weather information generating means for generating weather information indicating weather conditions at the photographing location by the photographing means, and position information of the photographing location is acquired. Obtaining means; and transmitting means for transmitting the weather information and the position information.
- the server device receives the weather information and the position information from a plurality of the information transmitting apparatuses, and receives map data.
- Storage means for storing; and weather map generating means for generating a map of weather conditions associated with the map data based on the weather information and the position information. Characterized in that it obtain.
- the server device includes a wiper related to the movement of the wiper generated based on the image of the wiper of the moving body taken by the information transmitting apparatus from the information transmitting apparatus that moves together with the moving body.
- the information transmitting method executed by the information transmitting apparatus having the photographing unit that moves together with the moving body is based on the image of the wiper of the moving body photographed by the photographing unit.
- the program executed by the information transmitting apparatus having the photographing unit and the computer that moves together with the moving body is an image of the wiper of the moving body photographed by the photographing unit.
- the recording medium records the above program.
- FIG. 1 shows a schematic configuration example of a system realized by a server device and a navigation device. It is a block diagram which shows schematic structure of a server and a navigation apparatus. It is a figure which shows the installation position and imaging
- Weather information generating means for generating weather information indicating the position
- acquisition means for acquiring position information of the shooting location
- transmission means for transmitting the weather information and the position information.
- weather information indicating the weather condition at the shooting location is generated based on the wiper image shot by the shooting means (camera, etc.), and the weather information is transmitted together with the location information of the shooting location. To do. Thereby, it becomes possible to provide weather information appropriately with a simple configuration. Specifically, weather information can be appropriately generated and provided by software processing without using a sensor or the like provided in the vehicle.
- the weather information generation unit may be configured to determine the number of times the wiper moves in a plurality of images photographed by the photographing unit during a predetermined time, or the wiper in the plurality of images.
- the weather information is generated based on the number of times included. Thereby, a weather condition can be discriminated accurately.
- the weather information generating means generates information on the intensity of rainfall as the weather information.
- the information transmission device further includes storage means for storing the weather information, wherein the weather information generation means includes weather information generated this time, past weather information stored in the storage means, The information on the weather change is further generated, and the transmission means transmits the weather information, the position information, and the information on the weather change.
- the weather information generation means includes weather information generated this time, past weather information stored in the storage means, The information on the weather change is further generated, and the transmission means transmits the weather information, the position information, and the information on the weather change.
- the transmitting unit does not transmit the weather information when the moving body travels in any of a tunnel, under an overpass, and an indoor parking lot. Thereby, it can suppress appropriately providing incorrect weather information.
- the transmission unit may be configured to transmit the weather information and the position information together with the weather information and the position information when the mobile body travels in a tunnel, under an overpass, or an indoor parking lot.
- Information indicating that the moving body is traveling in a tunnel, under an overpass, or in an indoor parking lot is transmitted. This makes it possible to appropriately determine weather information that should not be adopted on the weather information receiving side.
- the weather information generation unit may display an image included in a pixel area having a luminance decrease of a predetermined value or more by comparing between consecutive images captured by the imaging unit. Is specified as a wiper image candidate that is a candidate for the image of.
- the weather information generating means may employ the wiper image candidate as the wiper image when the shape of the wiper image candidate satisfies a predetermined aspect ratio.
- the weather information generation means may employ the wiper image candidate as the wiper image when the inclination of the shape of the wiper image candidate is within a predetermined angle range.
- a weather condition acquisition system including an information transmission device that moves together with a mobile body, and a server device that is communicatively connected to the information transmission device.
- the information transmission device includes a photographing unit, and the photographing unit.
- Weather information generating means for generating weather information indicating the weather condition at the shooting location by the shooting means based on the image of the wiper of the moving body shot by the means, and acquisition means for acquiring position information of the shooting location
- transmitting means for transmitting the weather information and the position information
- the server device stores map data and receiving means for receiving the weather information and the position information from a plurality of the information transmitting devices.
- Storage means and weather map generation means for generating a map of weather conditions associated with the map data based on the weather information and the position information.
- the server device includes a wiper relating to the movement of the wiper generated based on the image of the wiper of the moving body taken by the information transmitting apparatus from the information transmitting apparatus that moves together with the moving body.
- an information transmission method executed by an information transmission apparatus having an imaging unit that moves with a moving body is based on an image of the wiper of the moving body that is captured by the imaging unit.
- a program executed by an information transmitting apparatus having an imaging unit and a computer that moves together with a moving body is an image of the wiper of the moving body that is captured by the imaging unit.
- the above program can be suitably handled in a state of being recorded on a recording medium.
- FIG. 1 shows a schematic configuration example of a system realized by a navigation device 1 and a server device 2 according to the present embodiment.
- the navigation devices 1a to 1c (1) are mounted on different vehicles 100a to 100c (100), respectively, and exchange information with the server device 2.
- the server device 2 stores information received from the navigation device 1 and transmits the generated information to the navigation device 1.
- the navigation device 1 can be a stationary navigation device installed in the vehicle 100, a PND (Portable Navigation Device), or a mobile phone such as a smartphone, and has a function of performing route guidance to a destination. .
- the navigation device 1 corresponds to an example of an “information transmission device” in the present invention. Further, the system including the navigation device 1 and the server device 2 as shown in FIG. 1 corresponds to an example of the “weather condition acquisition system” in the present invention.
- navigation devices 1a to 1c are shown, but four or more navigation devices 1 may be applied.
- FIG. 2 is a block diagram showing a schematic configuration of the navigation device 1 and the server device 2.
- the navigation device 1 and the server device 2 are configured to be communicable via a wireless network or the like.
- the navigation device 1 mainly includes a control unit 11, a storage unit 12, an input unit 13, a GPS receiver 14, a self-supporting positioning device 15, a camera 16, a display unit 17, and a communication unit 18. Prepare.
- the storage unit 12 includes a hard disk, a ROM (Read Only Memory), a RAM (Random Access Memory), and the like (not shown).
- the storage unit 12 stores various control programs for controlling the navigation device 1 and the like. 11 provides a working area.
- the storage unit 12 stores map data, for example.
- the input unit 13 includes keys, switches, buttons, a remote controller, a voice input device, and the like for inputting various commands and data.
- the display unit 17 is configured in a touch panel system, the touch panel provided on the display screen of the display unit 17 also functions as the input unit 13.
- the GPS receiver 14 receives radio waves carrying downlink data including positioning data from a plurality of GPS satellites.
- the positioning data is used to detect the absolute position of the navigation device 1 (uniquely the position of the vehicle 100) from latitude and longitude information.
- the self-supporting positioning device 15 includes an acceleration sensor (not shown), an angular velocity sensor, a distance sensor, and the like.
- the acceleration sensor is made of, for example, a piezoelectric element, detects the acceleration of the vehicle 100, and outputs acceleration data.
- the angular velocity sensor is composed of, for example, a vibrating gyroscope, detects the angular velocity of the vehicle 100 when the direction is changed, and outputs angular velocity data and relative azimuth data.
- the distance sensor measures a vehicle speed pulse composed of a pulse signal generated with the rotation of the wheel of the vehicle 100.
- the camera 16 is installed near the ceiling in the vehicle interior of the vehicle 100 so that a part of or all of the wiper 101 that swings on the front glass is captured in the photographing area together with the scenery in front of the vehicle 100. Is done.
- the camera 16 corresponds to an example of “imaging means” in the present invention. Instead of installing the camera 16 near the ceiling, the camera 16 may be installed on the dashboard. Even in such a case, the camera 16 may be installed at a position where a part or all of the wiper 101 is captured in the shooting area together with the scenery in front of the vehicle 100.
- the display unit 17 is configured by a liquid crystal display, for example, and displays characters and images to the user.
- the display unit 17 may be configured to include a touch panel.
- the communication unit 18 is configured to be able to communicate with the server device 2 via a network (not shown). For example, the communication unit 18 transmits weather information generated by the control unit 11 to the server device 2. The communication unit 18 receives information transmitted from the server device 2. The communication unit 18 corresponds to an example of a “transmission unit” in the present invention.
- the control unit 11 includes a CPU (Central Processing Unit) (not shown) and the like, and controls the entire navigation device 1.
- the control unit 11 generates weather information indicating the weather condition of the shooting location based on an image (captured image) captured by the camera 16 and the server device 2 uses the communication unit 18 to transmit the weather information. To send to.
- the control unit 11 corresponds to an example of “weather information generation unit” and “acquisition unit” in the present invention.
- the server device 2 mainly includes a control unit 21, a storage unit 22, and a communication unit 23.
- the communication unit 23 is configured to be able to communicate with the navigation device 1 via a network (not shown). Specifically, the communication unit 23 receives weather information transmitted from the navigation device 1. In addition, the communication unit 23 transmits information generated by the control unit 21 to the navigation device 1.
- the communication unit 23 corresponds to an example of “reception unit” in the present invention.
- the storage unit 22 includes a hard disk, a ROM, a RAM, and the like (not shown), and stores weather information transmitted from the plurality of navigation devices 1.
- the storage unit 22 stores map data, for example.
- the control unit 21 includes a CPU (not shown) and the like, and controls the entire server device 2. In the present embodiment, the control unit 21 generates information according to the weather information received from the navigation device 1 via the communication unit 23.
- the control unit 21 corresponds to an example of “weather map generation unit” and “detection unit” in the present invention.
- FIG. 4 is a flowchart showing the overall processing according to the first embodiment. The flow is executed by the control unit 11 in the navigation device 1.
- step S1 the control unit 11 determines whether or not the user has selected the wiper shooting mode using the input unit 13. In this case, the control unit 11 performs the determination based on the signal output from the input unit 13.
- the wiper photographing mode is a mode for photographing the wiper 101 of the vehicle 100 with the camera 16 of the navigation device 1.
- the weather information is generated based on the image of the wiper 101 captured by the camera 16 in the navigation device 1, and therefore the wiper shooting mode is for generating the weather information in the navigation device 1. In other words.
- step S1: Yes If it is determined that the user has selected the wiper shooting mode (step S1: Yes), the process proceeds to step S2. On the other hand, when it is determined that the user has not selected the wiper shooting mode (step S1: No), the process returns to step S1.
- step S ⁇ b> 2 the control unit 11 activates the camera 16 and performs control to increase the resolution of the camera 16. The reason why the resolution of the camera 16 is increased is to capture the movement of the wiper 101 at a high resolution. Then, the process proceeds to step S3.
- step S ⁇ b> 3 the control unit 11 analyzes a captured image of the camera 16, thereby wiping a wiper that is a candidate for an image of the wiper 101 used to generate weather information (hereinafter simply referred to as a “wiper image”). Image candidates are detected. Then, the process proceeds to step S4. Details of the process in step S3 will be described later.
- step S4 the control unit 11 determines whether or not to adopt the wiper image candidate detected in step S3 as a wiper image used for generating weather information.
- the control unit 11 analyzes the wiper image candidate to determine whether the wiper image candidate has a shape corresponding to the wiper 101.
- step S4: Yes the process proceeds to step S5.
- step S4: No the process is performed at step S3. Return to. Details of the process in step S4 will be described later.
- step S5 the control unit 11 generates weather information based on the wiper image adopted in step S4. In this case, based on the movement of the wiper 101 in the image, the control unit 11 generates weather information indicating the presence / absence of rainfall at the shooting location, the intensity of rainfall, and the like. Then, the process proceeds to step S6. Details of the process in step S5 will be described later.
- step S6 the control unit 11 acquires position information indicating the position of the shooting location where the shooting by the camera 16 was performed.
- the control unit 11 acquires position information indicating the position coordinates of the shooting location based on the output value of the GPS receiver 23 and / or the output value of the autonomous positioning device 24. Further, the control unit 11 stores the weather information and the position information in the storage unit 12 in association with each other. Then, the process proceeds to step S7.
- step S7 the control unit 11 determines whether or not there is a change in the weather information generated in step S5. In this case, the control unit 11 determines whether or not the weather information generated at step S5 this time has changed with respect to the weather information generated at the previous step S5. When it determines with there being no change in weather information (step S7: No), a process returns to step S5. In this case, the control unit 11 performs the processes of steps S5 to S6 described above again. On the other hand, when it is determined that there is a change in the weather information (step S7: Yes), the process proceeds to step S8. If the weather information is generated in step S5 for the first time after the wiper shooting mode is selected in step S1, the weather information generated in step S5 is changed because there is no previous weather information. Determined.
- step S8 the control unit 11 causes the communication unit 18 to transmit the weather information and the position information stored in association with the storage unit 12 in step S6 to the server device 2. Then, the process proceeds to step S9.
- step S9 the control unit 11 determines whether or not the user has selected the end of the wiper shooting mode using the input unit 13. In this case, the control unit 11 performs the determination based on the signal output from the input unit 13. If it is determined that the user has selected to end the wiper shooting mode (step S9: Yes), the process ends. On the other hand, when it is determined that the user has not selected the end of the wiper shooting mode (step S9: No), the process returns to step S5.
- time information indicating the time when the weather information is generated is added to the weather information and the position information and transmitted to the server apparatus 2. You may do it. Furthermore, the image captured by the camera 16 may be added to the weather information and the position information and transmitted to the server device 2.
- the weather information and the position information are transmitted to the server device 2 only when the weather information changes. That is, when the weather information has not changed, the weather information and the position information are not transmitted to the server device 2.
- the weather information and the position information may be transmitted to the server device 2 at predetermined time intervals regardless of changes in the weather information.
- only the position information may be transmitted to the server device 2 when the weather information has not changed. That is, when the weather information has not changed, the weather information may be omitted and only the position information may be transmitted to the server device 2.
- FIG. 5 is a diagram for explaining an example of a wiper image candidate detection method.
- the control unit 11 in the navigation device 1 acquires temporally continuous frames from a moving image shot by the camera 16. Then, the control unit 11 compares the luminance of pixels having the same position between the image G11 corresponding to the reference frame and the image G12 corresponding to the frame immediately before the frame, Among the G11 pixels, a pixel whose luminance is lower than the pixel of the image G12 by a predetermined value or more is extracted. Thereby, the difference image G21 is obtained.
- the control unit 11 compares the luminance of pixels having the same position between the image G11 corresponding to the reference frame and the image G13 corresponding to the next frame of the frame. Among the pixels of the image G11, pixels whose luminance is lower than the pixel of the image G13 by a predetermined value or more are extracted. Thereby, the difference image G22 is obtained.
- the reason why the pixels whose luminance is lower than the predetermined value is extracted as described above is that the wiper 101 is black and the wiper 101 blocks outside light.
- control unit 11 further extracts pixels extracted in both the image G11 and the image G12 and the image G11 and the image G13. That is, the control unit 11 obtains a logical sum (AND) of the difference image G21 and the difference image G22. Thereby, the image G3 is obtained.
- the controller 11 erases a fine pattern (noise) in the image G3 by repeatedly performing general contraction / expansion processing on the image G3. Thereby, the image G4 is obtained.
- the control unit 11 uses a white portion in the image G4 as a wiper image candidate.
- the luminance sums in the blocks are compared in units of blocks composed of vertical M ⁇ N horizontal pixels in the images G11 to G13, and the difference of the luminance sums is a predetermined value. You may extract the block which is the above. In this way, it is possible to reduce the processing load and eliminate the influence of fine noise in pixel units.
- FIG. 6 is a diagram for explaining an example of a determination method for a wiper image candidate.
- the control unit 11 in the navigation device 1 selects a wiper image candidate (portion represented by white in the image G4) in the image G4 obtained as described above.
- a plurality of constituent pixels are used as candidate points, and a regression line L1 for the plurality of candidate points is obtained based on the least square method.
- the control unit 11 obtains a perpendicular line L2 that passes through the centroid P1 of the wiper image candidate (in other words, the centroid P1 of the candidate point group) and is orthogonal to the regression line L1.
- the control unit 11 obtains the sum Sum1 of the distances di at all candidate points constituting the wiper image candidate based on the equation (1) in FIG. 6C, and also calculates the equation in FIG. Based on (2), the sum Sum2 of the distances Di at all candidate points constituting the wiper image candidate is obtained.
- control part 11 calculates
- comparing the ratio Rate with a predetermined value corresponds to an example of determining whether or not the shape of the wiper image candidate satisfies a predetermined aspect ratio.
- the control unit 11 determines that the candidate wiper image has a shape corresponding to the wiper 101, and adopts the wiper image candidate as the wiper image.
- the control unit 11 determines that the wiper image candidate to be determined does not have a shape corresponding to the wiper 101, and the wiper image candidate Is not used as a wiper image.
- a wiper image can be appropriately identified from wiper image candidates. That is, the image of the wiper 101 included in the captured image can be specified with high accuracy.
- the determination method described in FIG. 6 is “first determination method”, in another example, instead of the first determination method, the following determination methods (second to fourth determination methods) are used. It is possible to determine whether or not the wiper image candidate has a shape corresponding to the wiper 101.
- the control unit 11 determines the inclination of the wiper image candidate corresponding to the wiper 101 based on whether or not the angle (inclination) of the regression line L1 obtained as described above is within a predetermined range. It is determined whether or not it has. In this example, the control unit 11 determines that the wiper image candidate has an inclination corresponding to the wiper 101 when the angle of the regression line L1 is within a predetermined range.
- the control unit 11 determines whether the wiper image candidate is based on whether the area of the wiper image candidate (which is uniquely the number of pixels constituting the wiper image candidate) is within a predetermined range. It is determined whether or not it has a size corresponding to the wiper 101. In this example, the control unit 11 determines that the wiper image candidate has a size corresponding to the wiper 101 when the area of the wiper image candidate is within a predetermined range.
- the control unit 11 obtains the variance of the histogram in the horizontal direction at the candidate points constituting the wiper image candidate, and the wiper image candidate is determined based on whether the variance is equal to or less than a predetermined value. It is determined whether or not it has a shape corresponding to the wiper 101. In this example, the control unit 11 determines, based on the variance, whether the candidate points are not scattered, in other words, whether the candidate points form a cluster. The control unit 11 determines that the wiper image candidate has a shape corresponding to the wiper 101 when the obtained variance is equal to or less than a predetermined value.
- any two or more of the first to fourth determination methods may be combined.
- the control unit 11 in the navigation device 1 determines the operation status of the wiper 101 based on the wiper image adopted by the above-described determination method, and generates weather information indicating the weather status at the shooting location. Specifically, the control unit 11 determines the number of operations of the wiper 101 within the predetermined time (hereinafter referred to as “wiper”) based on the movements of the wiper images in a plurality of captured images obtained within a predetermined time (for example, 20 seconds). This is referred to as “number of operations”.) And weather information is generated from the number of wiper operations.
- the control unit 11 uses, as the number of wiper operations, the number of times that the wiper image moves in a plurality of captured images obtained within a predetermined time.
- the control unit 11 uses the number of times that the wiper image passes a predetermined point in the captured image within a predetermined time (hereinafter referred to as “the number of wiper passes”) as the number of wiper operations.
- the predetermined point is a location in the captured image where the wiper image always passes. Note that the wiper image is monitored for a predetermined time as described above when the driver moves the wiper 101 for a reason other than the rain (for example, when the windshield is washed), and the wiper 101 operates for the rain. This is to suppress the determination that the user is doing.
- the control unit 11 generates weather information indicating “with rain” or “without rain” as the weather situation. In this example, when the number of times the wiper has passed is larger than a predetermined number (for example, 5 times), the control unit 11 generates weather information indicating “with rain” and the number of times the wiper has passed is equal to or less than the predetermined number. Generates weather information indicating “no rain”.
- control unit 11 generates weather information indicating the intensity of rainfall as the weather condition.
- the control unit 11 generates weather information indicating any one of “lightly falling”, “medium falling”, “large falling”, and “no rain”.
- the control unit 11 generates weather information indicating “no rain” when the number of wiper passages is 5 or less, and “slightly down” when the number of wiper passages is within a range of 6 to 10 times. If the number of wiper passages is within the range of 11 to 19 times, the weather information indicating “middle descent” is generated. If the number of wiper passages is 20 or more, “large” is generated. Weather information indicating "get off” is generated.
- the weather information can be appropriately generated based on the image of the wiper 101 photographed by the camera 16 without using a sensor or the like provided in the vehicle.
- the frame rate of a moving picture taken by the camera 16 may be changed according to the brightness of the shooting target. For example, when the shooting target is dark, the camera 16 may reduce the shutter speed in order to obtain sufficient exposure. In this case, the frame rate of the moving image is lowered. In such a situation, since the interval between frames to be photographed becomes long, even if the wiper 101 is moving, the wiper 101 is sporadically reflected in only one frame, or the wiper 101 passes through during the interval. Thus, there may be a case where the wiper 101 is not shown in the image.
- the control unit 11 replaces the number of times the wiper image moves (in other words, the number of times the wiper passes) in a plurality of captured images obtained within a predetermined time in order to eliminate the above-described problem.
- the number of wiper operations is estimated based on the number of times the wiper images are included in the plurality of captured images (hereinafter referred to as “the number of times the wiper is captured”). More specifically, the control unit 11 estimates the number of wiper operations from the number of wiper captures based on the frame rate of the moving image captured by the camera 16.
- a table in which a frame rate, the number of wiper reflections, and the number of wiper operations are associated with each other is prepared in advance, and the control unit 11 refers to such a table to determine the current frame rate and the number of wiper reflections. Get the corresponding wiper movement count.
- the control unit 11 sets a predetermined time (hereinafter referred to as “monitoring time”) for monitoring the movement of the wiper 101 according to the frame rate of the moving image captured by the camera 16. Specifically, the control unit 11 sets the monitoring time longer as the frame rate is lower. According to the other examples described above, the number of wiper operations can be accurately estimated regardless of the frame rate of the moving image captured by the camera 16.
- the control unit 21 in the server device 2 is based on the weather information and the position information received from the navigation device 1 via the communication unit 23, and maps the weather conditions associated with the map data stored in the storage unit 22 (in the following, Called "weather map").
- the control unit 21 shows a weather map showing the weather situation for each region obtained by dividing the map into predetermined areas (for example, an area of 500 ⁇ 500 m) based on the weather information and position information received from the plurality of navigation devices 1. Is generated.
- the control unit 21 displays the weather condition indicated by the received weather information (information indicating whether there is rain or no rain, or lightly falling, middlely falling, heavyly falling, and raining) A weather map is generated by associating information indicating one of none. Then, the control unit 21 transmits the generated weather map in response to a request from a predetermined terminal device (including the navigation device 1).
- control unit 21 generates a weather map in which the most frequent weather situation is associated with the area in the weather situation indicated by the weather information for the same area received from the plurality of navigation devices 1.
- a weather map is generated in which the weather condition indicated by the newest weather information among the weather information for the same area received from the plurality of navigation devices 1 is associated with the area.
- the server device 2 According to the processing of the server device 2 described above, by collecting the weather information received from the navigation device 1 mounted on the plurality of vehicles 100, it is possible to appropriately generate a weather map indicating the weather condition of each area. it can.
- Second Example Next, a second example will be described. Hereinafter, only the configuration (processing, control, etc.) different from the first embodiment will be described. The configuration of the first embodiment not described here can be implemented in combination with the second embodiment as appropriate.
- the weather information is generated and transmitted to the server device 2 only when the movement of the wiper 101 changes (see FIG. 4).
- the change in the movement of the wiper 101 is performed.
- the weather information is generated at a predetermined time interval and transmitted to the server device 2.
- the control unit 11 in the navigation device 1 changes how the weather changes based on the weather information generated this time and the past weather information stored in the storage unit 12.
- Information hereinafter referred to as “weather change information”
- the control unit 11 generates information indicating “beginning of rain”, “continuing rain”, “end of rain”, and “continuing without rain” as weather change information.
- the weather change information is not limited to being generated separately from the weather information, and the weather change information may be included in the weather information.
- weather information including weather change information is transmitted to the server device 2.
- the weather change information is generated by including the weather information will be specifically described.
- FIG. 7 is a flowchart showing a weather information generation method according to the second embodiment. This flow is performed in step S5 of FIG. 4 by the control unit 11 in the navigation device 1. In the flow, the control unit 11 generates weather information including weather change information.
- step S501 the control unit 11 starts a timer.
- step S502 the control unit 11 estimates the number of wiper operations within a predetermined time. Specifically, the control unit 11 determines the movement of the wiper image adopted from the wiper image candidates by the method described in the sections “2-2. Wiper image candidate detection” and “2-3. Wiper image candidate determination”. Based on this, the number of wiper operations within a predetermined time is estimated. In this case, the control unit 11 estimates the number of wiper operations using the method described in “2-4. Weather information generation”.
- control unit 11 includes the number of times the wiper image moves (in other words, the number of times the wiper passes) in a plurality of captured images obtained within a predetermined time, or includes the wiper image in the plurality of captured images.
- the number of wiper operations is estimated based on the number of times (the number of times the wiper is reflected). Then, the process proceeds to step S503.
- step S503 the control unit 11 determines whether or not the number of wiper operations estimated in step S502 is greater than a predetermined number (for example, 5 times). When the number of wiper operations is greater than the predetermined number (step S503: Yes), the control unit 11 determines that there is rainfall this time (step S504). And the control part 11 determines the last weather information (step S505). When there is no previous weather information data, the control unit 11 generates weather information indicating “rainfall” (step S506). When the previous weather information is “with rain”, the control unit 11 generates weather information indicating “continuing rain” (step S507). If the previous weather information is “no rain”, the control unit 11 generates weather information indicating “beginning of rain” (step S508). Then, after steps S506 to S508, the process ends.
- a predetermined number for example, 5 times.
- step S503 determines that there is no rain this time (step S509). And the control part 11 determines the last weather information (step S510). If there is no previous weather information data, the control unit 11 generates weather information indicating "no rain” (step S511). When the previous weather information is “with rain”, the control unit 11 generates weather information indicating “end of rain” (step S512). When the previous weather information is “no rain”, the control unit 11 generates weather information indicating “continuing no rain” (step S513). Then, after steps S511 to S513, the process ends.
- weather information including weather change information can be appropriately generated. According to such weather information, it is possible to appropriately grasp how the weather has changed (or whether the weather has not changed). Specifically, by transmitting weather information including weather change information, position information, and time information to the server device 2, when, where and when it started raining on the server device 2 side Can be efficiently organized.
- a monitoring time for monitoring the movement of the wiper 101 and / or an interval for monitoring the movement of the wiper 101 according to the weather information generated this time (hereinafter referred to as “monitoring interval”). It may be changed. For example, when the weather information indicating “end of rain” is generated, the monitoring time may be extended or the monitoring interval may be shortened. By doing so, it is possible to accurately determine the end of rain.
- the weather change information may be generated on the server device 2 side.
- the navigation device 1 generates and transmits weather information that does not include weather change information
- the server device 2 receives the weather information received this time and the weather information received last time (stored in the storage unit 22). It is only necessary to generate weather change information indicating how the weather has changed (or whether the weather has not changed).
- the third embodiment is different from the first and second embodiments in that the weather information is not transmitted to the server device 2 when the vehicle 100 is traveling in any of a tunnel, under an overpass, and an indoor parking lot.
- the control unit 11 in the navigation device 1 uses, for example, the positioning data of the GPS receiver 14 and the data of the tunnel, the overpass, and the indoor parking lot stored as map data. It is determined whether the vehicle is traveling under an overpass or indoor parking lot. And the control part 11 does not transmit weather information to the server apparatus 2, when it determines with the vehicle 100 driving
- the wiper 101 tends not to operate even in a rainy state. It is possible to prevent the weather information indicating “no rain” from being transmitted even though it is raining.
- weather information is not transmitted to the server device 2 as described above, that is, when it is determined that the vehicle 100 is traveling in a tunnel, under an overpass, or an indoor parking lot, the weather information is generated. It does not have to be generated (it does not matter).
- the GPS receiver 14 when the vehicle 100 is traveling in a tunnel, under an overpass, or in an indoor parking lot, the GPS receiver 14 is likely not to receive radio waves.
- vehicle 14 is not receiving radio waves (the radio wave intensity of GPS receiver 14 may be equal to or lower than a predetermined value)
- vehicle 100 travels in a tunnel, under an overpass, or in an indoor parking lot. It may be determined that the weather information is not transmitted to the server device 2.
- the vehicle 100 when the vehicle 100 is traveling in a tunnel, under an overpass, or in an indoor parking lot, instead of not transmitting weather information, the vehicle 100 is in a tunnel, under an overpass, and Information indicating that the vehicle is traveling in any of the indoor parking lots may be attached to the weather information and transmitted to the server device 2.
- the server apparatus 2 receives weather information with information indicating that the vehicle 100 is traveling in a tunnel, under an overpass, or in an indoor parking lot, the server apparatus 2 displays the weather information on the weather map. If not used for generation.
- the navigation device 1 always transmits weather information and position information to the server device 2, and the server device 2 determines whether the vehicle 100 is in a tunnel, under an overpass, or indoor parking lot based on the position information.
- the weather information may not be used for generating the weather map.
- the server device 2 travels in the tunnel, under the overhead, or in the indoor parking lot based on the data of the tunnel, the overhead, or the indoor parking lot stored as map data in the storage unit 22. It is determined whether or not.
- the fourth embodiment differs from the first to third embodiments in that the number of wiper operations described above is corrected according to the traveling speed of the vehicle 100, and weather information is generated based on the corrected number of wiper operations.
- the control unit 11 in the navigation device 1 corrects the number of wiper operations estimated by the method described in “2-4. Weather information generation” according to the traveling speed. Then, the number of wiper operations corresponding to the time when the vehicle 100 is stopped (hereinafter referred to as “the number corresponding to the time of stopping”) is obtained. And the control part 11 produces
- the control unit 11 obtains the traveling speed of the vehicle 100 based on the output value of the GPS receiver 23 and / or the output value of the self-supporting positioning device 24 or acquires information on the vehicle speed pulse from the vehicle 100. Then, the traveling speed of the vehicle 100 is obtained.
- the reason for correcting the number of wiper operations as described above is as follows.
- the control unit 11 corrects the number of wiper operations according to the traveling speed.
- the control unit 11 corrects the number of wiper operations using a correction coefficient as shown in FIG. FIG. 8 shows a correction coefficient table (correction coefficient table) for correcting the number of wiper movements corresponding to each traveling speed range to the number corresponding to the stop time.
- This correction coefficient table is obtained in advance by experiments and simulations and stored in the storage unit 12. For example, consider a case where “20 times” is required as the number of wiper operations when traveling at 100 km / h. In that case, the control unit 11 refers to the correction coefficient table, acquires “0.25” corresponding to 100 km / h as a correction coefficient, and performs the number of wiper operations by the calculation “20 times ⁇ 0.25”. Is corrected to obtain “5 times” as the equivalent number of times of stoppage.
- a different correction coefficient table may be used for each vehicle type.
- the control unit 11 receives registration regarding the vehicle type by the user, acquires a correction coefficient table corresponding to the registered vehicle type, and corrects the number of wiper operations based on the correction coefficient table.
- the reason why the correction coefficient table corresponding to the vehicle type is used is that the correction coefficient for correcting the number of wiper operation times to the number corresponding to the stop time according to the traveling speed tends to differ depending on the vehicle type.
- the ease of blowing raindrops during driving varies depending on the inclination of the windshield for each vehicle type, and it may not be necessary to increase the operating speed of the wiper 101 during high-speed driving depending on the vehicle type (that is, depending on the vehicle type This is because it may not be necessary to greatly correct the number of wiper operations during driving.
- the correction coefficient table for each vehicle type is obtained in advance by experiments and simulations and stored in the storage unit 12.
- correction coefficient tables may be used depending on the presence or absence of a water-repellent coating on the windshield.
- the control unit 11 accepts registration regarding whether or not the windshield is subjected to water repellent coating by the user, acquires a correction coefficient table according to the presence or absence of the registered water repellent coating, and The number of wiper operations is corrected based on the correction coefficient table.
- Such a correction coefficient table is also obtained in advance by experiments and simulations and stored in the storage unit 12.
- the correction coefficient table as described above may be stored in the storage unit 22 in the server device 2 instead of being stored in the storage unit 12 in the navigation device 1.
- the navigation apparatus 1 accepts registration of information necessary for obtaining the correction coefficient table, and transmits the information to the server apparatus 2, and the server apparatus 2 adds the information transmitted from the navigation apparatus 1 to the information.
- the corresponding correction coefficient table is read from the storage unit 22 and the correction coefficient table is transmitted to the navigation device 1.
- the wiper operation status may be acquired from an in-vehicle network such as CAN (Controller Area Network).
- the navigation device 1 acquires information indicating whether the wiper 101 is set to perform an interval operation, a normal operation, or a high speed operation as the wiper operation status.
- the control unit 11 in the navigation device 1 generates weather information based on the acquired wiper operation status and the traveling speed of the vehicle 100. Specifically, the control unit 11 corrects the number of wiper operations corresponding to the wiper operation status with a correction coefficient corresponding to the traveling speed, and generates weather information indicating the intensity of rainfall.
- the weather information is generated on the navigation device 1 side.
- the weather information may be generated on the server device 2 side.
- the navigation device 1 generates wiper information related to the movement of the wiper 101 based on the captured image of the camera 16, and transmits the wiper information and position information indicating the position of the shooting location by the camera 16 to the server device 2.
- the server device 2 generates weather information at the shooting location based on the wiper information and position information received from the navigation device 1. That is, the server device 2 detects the weather condition at the shooting location.
- the navigation device 1 generates the number of wiper operations as the wiper information
- the server device 2 generates weather information indicating “with rain” or “without rain” based on the number of wiper operations.
- the navigation device 1 transmits the traveling speed of the vehicle 100 together with the wiper information and the position information to the server device 2, and the server device 2 performs wiper information (wiper operation) according to the received traveling speed.
- the weather information may be generated based on the corrected wiper information.
- the present invention is applied to the navigation device 1, but the application of the present invention is not limited to this.
- the present invention is applicable to a mobile terminal (such as a smartphone) that includes a camera and can measure the position of the device, a drive recorder, and the like. That is, the “information transmitting device” according to the present invention can be applied to such a portable terminal or a drive recorder.
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Abstract
Description
図1は、本実施例に係るナビゲーション装置1及びサーバ装置2によって実現されるシステムの概略構成例を示している。
以下では、第1実施例に係る構成について説明する。
まず、図4を参照して、第1実施例において、ナビゲーション装置1内の制御部11によって実行される処理の概要について説明する。図4は、第1実施例に係る全体処理を示すフローチャートである。当該フローは、ナビゲーション装置1内の制御部11によって実行される。
次に、図5を参照して、図4のステップS3で行われるワイパー画像候補の検出手法について具体的に説明する。図5は、ワイパー画像候補の検出手法の一例を説明するための図を示している。
次に、図6を参照して、図4のステップS4で行われる、ワイパー画像候補をワイパー画像として採用するか否かを判定する手法について具体的に説明する。つまり、ワイパー画像候補がワイパー101に相当する形状を有するか否かを判定する手法について具体的に説明する。図6は、ワイパー画像候補に対する判定手法の一例を説明するための図を示している。
次に、図4のステップS5で行われる天候情報の生成手法について具体的に説明する。ナビゲーション装置1内の制御部11は、上記した判定手法により採用されたワイパー画像に基づいて、ワイパー101の動作状況を判断して、撮影場所での天候状況を示す天候情報を生成する。具体的には、制御部11は、所定時間内(例えば20秒間)に得られた複数の撮影画像におけるワイパー画像の動きに基づいて、当該所定時間内のワイパー101の動作回数(以下では「ワイパー動作回数」と呼ぶ。)を推定し、当該ワイパー動作回数から天候情報を生成する。
次に、サーバ装置2内の制御部21によって実行される処理について具体的に説明する。サーバ装置2内の制御部21は、ナビゲーション装置1から通信部23を介して受信した天候情報及び位置情報を基に、記憶部22に記憶された地図データと関連付けた天候状況のマップ(以下では「天候マップ」と呼ぶ。)を生成する。この場合、制御部21は、複数のナビゲーション装置1から受信した天候情報及び位置情報を基に、地図を所定のエリア(例えば500×500mのエリア)に分割した地域ごとの天候状況を示す天候マップを生成する。
次に、第2実施例について説明する。なお、以下では、第1実施例と異なる構成(処理や制御など)のみを説明する。ここで説明しない第1実施例の構成は、第2実施例に適宜組み合わせて実施することができる。
次に、第3実施例について説明する。なお、以下では、第1及び第2実施例と異なる構成(処理や制御など)のみを説明する。ここで説明しない第1及び第2実施例の構成は、第3実施例に適宜組み合わせて実施することができる。
次に、第4実施例について説明する。なお、以下では、第1乃至第3実施例と異なる構成(処理や制御など)のみを説明する。ここで説明しない第1乃至第3実施例の構成は、第4実施例に適宜組み合わせて実施することができる。
上記した実施例では、ナビゲーション装置1側で天候情報を生成していたが、他の例では、サーバ装置2側で天候情報を生成しても良い。その場合、ナビゲーション装置1は、カメラ16の撮影画像に基づいてワイパー101の動きに関するワイパー情報を生成し、当該ワイパー情報と、カメラ16による撮影場所の位置を示す位置情報とをサーバ装置2に送信する。そして、サーバ装置2は、ナビゲーション装置1から受信したワイパー情報及び位置情報に基づいて、撮影場所での天候情報を生成する。つまり、サーバ装置2は、撮影場所での天候状況を検出する。例えば、ナビゲーション装置1は、ワイパー情報としてワイパー動作回数を生成し、サーバ装置2は、当該ワイパー動作回数に基づいて、「降雨あり」又は「降雨なし」を示す天候情報を生成する。
2 サーバ装置
11、21 制御部
12、22 記憶部
13 入力部
14 GPS受信機
15 自立測位装置
16 カメラ
17 表示部
18、23 通信部
100 車両
101 ワイパー
Claims (14)
- 移動体と共に移動する情報送信装置であって、
撮影手段と、
前記撮影手段によって撮影された前記移動体のワイパーの画像に基づいて、前記撮影手段による撮影場所での天候状況を示す天候情報を生成する天候情報生成手段と、
前記撮影場所の位置情報を取得する取得手段と、
前記天候情報及び前記位置情報を送信する送信手段と、
を備えることを特徴とする情報送信装置。 - 前記天候情報生成手段は、所定時間の間に前記撮影手段によって撮影された複数の画像中において前記ワイパーが移動する回数、又は前記複数の画像中に前記ワイパーが含まれる回数に基づいて、前記天候情報を生成することを特徴とする請求項1に記載の情報送信装置。
- 前記天候情報生成手段は、前記天候情報として、降雨の強度に関する情報を生成することを特徴とする請求項1又は2に記載の情報送信装置。
- 前記天候情報を記憶する記憶手段を更に備え、
前記天候情報生成手段は、今回生成した天候情報と、前記記憶手段に記憶された過去の天候情報とに基づいて、天候変化に関する情報を更に生成し、
前記送信手段は、前記天候情報、前記位置情報、及び前記天候変化に関する情報を送信することを特徴とする請求項1乃至3のいずれか一項に記載の情報送信装置。 - 前記送信手段は、前記移動体がトンネル内、高架下、及び屋内駐車場のいずれかを走行する場合は、前記天候情報を送信しないことを特徴とする請求項1乃至4のいずれか一項に記載の情報送信装置。
- 前記送信手段は、前記移動体がトンネル内、高架下、及び屋内駐車場のいずれかを走行する場合は、前記天候情報及び前記位置情報と共に、前記移動体がトンネル内、高架下、及び屋内駐車場のいずれかを走行していることを示す情報を送信することを特徴とする請求項1乃至4のいずれか一項に記載の情報送信装置。
- 前記天候情報生成手段は、前記撮影手段によって撮影された連続する画像間の比較により、所定値以上の輝度低下がある画素領域に含まれる画像を、前記ワイパーの画像の候補となるワイパー画像候補として特定することを特徴とする請求項1乃至6のいずれか一項に記載の情報送信装置。
- 前記天候情報生成手段は、前記ワイパー画像候補の形状が所定の縦横比を満たす場合に、当該ワイパー画像候補を前記ワイパーの画像として採用することを特徴とする請求項7に記載の情報送信装置。
- 前記天候情報生成手段は、前記ワイパー画像候補の形状の傾きが所定の角度範囲内である場合に、当該ワイパー画像候補を前記ワイパーの画像として採用することを特徴とする請求項7に記載の情報送信装置。
- 移動体と共に移動する情報送信装置と、前記情報送信装置と通信接続されたサーバ装置とを有する天候状況取得システムであって、
前記情報送信装置は、
撮影手段と、
前記撮影手段によって撮影された前記移動体のワイパーの画像に基づいて、前記撮影手段による撮影場所での天候状況を示す天候情報を生成する天候情報生成手段と、
前記撮影場所の位置情報を取得する取得手段と、
前記天候情報及び前記位置情報を送信する送信手段と、
を備え、
前記サーバ装置は、
複数の前記情報送信装置から前記天候情報及び前記位置情報を受信する受信手段と、
地図データを記憶する記憶手段と、
前記天候情報及び前記位置情報を基に、前記地図データと関連付けた天候状況のマップを生成する天候マップ生成手段と、
を備えることを特徴とする天候状況取得システム。 - 移動体と共に移動する情報送信装置から、当該情報送信装置が撮影した前記移動体のワイパーの画像を基に生成された前記ワイパーの動きに関するワイパー情報と、前記ワイパーの画像が撮影された場所の位置情報とを受信する受信手段と、
前記ワイパー情報及び前記位置情報を基に、前記ワイパーの画像が撮影された場所における天候状況を検出する検出手段と、
を備えることを特徴とするサーバ装置。 - 移動体と共に移動する、撮影手段を有する情報送信装置によって実行される情報送信方法であって、
前記撮影手段によって撮影された前記移動体のワイパーの画像に基づいて、前記撮影手段による撮影場所での天候状況を示す天候情報を生成する天候情報生成工程と、
前記撮影場所の位置情報を取得する取得工程と、
前記天候情報及び前記位置情報を送信する送信工程と、
を備えることを特徴とする情報送信方法。 - 移動体と共に移動する、撮影手段及びコンピュータを有する情報送信装置によって実行されるプログラムであって、
前記コンピュータを、
前記撮影手段によって撮影された前記移動体のワイパーの画像に基づいて、前記撮影手段による撮影場所での天候状況を示す天候情報を生成する天候情報生成手段、
前記撮影場所の位置情報を取得する取得手段、
前記天候情報及び前記位置情報を送信する送信手段、
として機能させることを特徴とするプログラム。 - 請求項13に記載のプログラムを記録したことを特徴とする記録媒体。
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JP2020052010A (ja) * | 2018-09-28 | 2020-04-02 | トヨタ自動車株式会社 | 降水指標推定装置 |
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JP2020085791A (ja) * | 2018-11-29 | 2020-06-04 | トヨタ自動車株式会社 | 情報処理システム、情報処理方法、及びプログラム |
JP7115258B2 (ja) | 2018-11-29 | 2022-08-09 | トヨタ自動車株式会社 | 情報処理システム、情報処理方法、及びプログラム |
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JP7363279B2 (ja) | 2019-09-26 | 2023-10-18 | 株式会社Jvcケンウッド | 画像記録装置、画像記録方法、及び画像記録プログラム |
JP2021169961A (ja) * | 2020-04-15 | 2021-10-28 | 株式会社デンソー | 天気情報収集システムおよびそれに含まれる天気情報取得装置 |
Also Published As
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JPWO2014199452A1 (ja) | 2017-02-23 |
US20160109617A1 (en) | 2016-04-21 |
JP6064045B2 (ja) | 2017-01-18 |
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