JP2008241507A - Navigation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation device capable of displaying the latest map, without the need for acquiring updating data from a producer of the map data and furthermore, without requiring updating operations. <P>SOLUTION: The navigation device comprises an imaging means 29 for repeatedly taking an image ahead of a vehicle; code-reading means 5 and 31 for memorizing in a memory means 17 map data change information shown by two dimension codes 57a to 57f, by reading the two dimension codes 57a to 57f contained in the image; a storage means 19 for storing the map data; and drawing means 5 and 23 for drawing a map in a drawing area, by using data of the drawing area extracted from the map data and the map data change information on the drawing area stored in the memory means 17. The map data change information relates to stores, facilities, traffic signs or roads. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a navigation device that displays a guidance screen using map data and guides a vehicle to a destination.

  A general navigation device mounted on a vehicle includes a recording medium that stores map data, and displays a map for vehicle guidance, a map near a destination, and the like using the map data. Since information about stores, facilities, roads, and the like included in the map data becomes obsolete with the passage of time, the update of map data is an important problem in such a navigation device. In recent years, proposals have been made to display store advertisements / advertising information on navigation devices. For example, it has been proposed to distribute advertisement / advertisement information to a navigation device using wireless communication, or to display advertisement / advertisement information obtained by a mobile phone by transferring it to the navigation device.

JP 2006-350057 A JP 2006-209280 A

  In general, map data is updated by replacing part or all of the map data with update data prepared by the creator of the map data (or the manufacturer of the navigation device). Therefore, changes such as additions, changes and deletions of stores and roads are investigated, update data is created based on the survey results, and further, the user updates the map data using the update data Will not be reflected in the map displayed on the navigation device. Since it takes a considerable amount of labor and time to perform such surveys and create update data, for example, a new road is opened in the vicinity of the user of the navigation device, or the user's commute When a new store starts operating along a road, it takes a considerable amount of time for the navigation device to display a map showing these roads and stores.

  Although it is conceivable for the user to operate the navigation device and add information related to a new store, road, etc. to the map data, it is very troublesome to input such information to the navigation device. In addition, it is possible to automatically generate information on a new road based on the travel record of the vehicle and add it to the map data, but information such as the name of the road and the number of lanes is automatically generated. It is not possible.

  When store advertisements / promotion information is distributed to navigation devices via wireless communication, it is necessary to install and manage the base station, and even if the store owner wants to display the advertisement / promotion information on the navigation device, it is difficult Can happen. In addition, the advertisement / advertisement information acquired through the mobile phone need not be displayed on the navigation device, but it is sufficient to be displayed on the mobile phone, and the mobile phone is used to display the advertisement / promotion information on the navigation device. There seems to be little real profit to use.

  The present invention solves the above problem, and it is not necessary to acquire update data from the creator of the map data, and further, it does not require update work of the map data by the user, and relates to stores, roads, etc. Provided is a navigation device that displays a map in which changes are reflected. The present invention also provides a navigation device capable of acquiring and displaying store advertisements / promotion information without providing special facilities along the road.

  The navigation apparatus according to the present invention includes a photographing unit that repeats photographing an image ahead of a vehicle, a two-dimensional code included in the photographed image, and map data change information indicated by the two-dimensional code in a storage unit. Using code reading means for storing, storage means for storing map data, drawing area data extracted from the map data, and map data change information relating to the drawing area stored in the storage means, Drawing means for drawing a map of the drawing area. Furthermore, in the navigation device of the present invention, the map data change information is change information related to a store, a facility, a traffic sign, or a road.

  The navigation device of the present invention includes a photographing unit that repeatedly captures an image in front of a vehicle, a code reading unit that reads a two-dimensional code included in the photographed image and obtains information indicated by the two-dimensional code, Display means for displaying information indicated by the two-dimensional code as character information. Furthermore, in the navigation device of the present invention, the information indicated by the two-dimensional code is advertisement / advertisement information of a store or a facility, or traffic information.

  The navigation device of the present invention repeatedly captures a landscape in front of a vehicle, reads a two-dimensional code indicating map data change information from the captured image, and uses the obtained map data change information and map data to display a map. indicate. Therefore, the latest map, that is, the updated map is displayed on the navigation device without requiring the user to acquire update data or update the map data. A two-dimensional code indicating map data change information is attached to a signboard of a store or facility, a road sign, or the like. For example, when a store owner of a new store attaches a two-dimensional code related to the store to a signboard, the navigation apparatus reads the two-dimensional code while the vehicle is traveling, and acquires map data change information related to the new store. When a map of an area including the store is drawn, map data change information regarding the store is referred to, and the store is added to the drawn map.

  The navigation device of the present invention repeatedly captures a scene in front of a vehicle, reads a two-dimensional code from the captured image, and displays advertisement / advertisement information of a store or facility indicated by the two-dimensional code together with a guidance screen or another screen. Is displayed as character information. As a result, store owners and related parties of the facility can send advertisement / advertisement information to the navigation device without providing any special equipment. Further, since the two-dimensional code indicates traffic information such as traffic jam information, detailed traffic information can be displayed on the navigation device.

  Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an outline of a navigation apparatus according to an embodiment of the present invention. The navigation device is mounted on a vehicle, and is searched by specifying a vehicle position based on radio waves received from a GPS (Global Positioning System) satellite and displaying a guidance screen including a map of the vicinity. The main function is to guide the traveling of the vehicle along the guidance route.

  The GPS unit (1) includes a receiving antenna, a tuner, and the like, and processes radio waves received from GPS satellites to extract positioning data. The retrieved positioning data is sent to the control unit (5) via the interface unit (3). The control unit (5) is composed of, for example, a microcomputer, and specifies the current position of the vehicle based on the positioning data sent from the GPS unit (1). The navigation device employs a so-called hybrid system, and includes a gyro sensor (7) for detecting the direction of the vehicle and a vehicle speed sensor (9) for detecting the speed of the vehicle. Based on the signals of these sensors (7) and (9) sent via the interface unit (3), the control unit (5) identifies the direction and speed of the vehicle.

  The control unit (5) performs overall control of the navigation device, and executes various processes such as vehicle position specification, route search, and later-described two-dimensional code analysis. The control unit (5) is composed of, for example, a microcomputer. The CPU (11) executes various programs in which processing and operation procedures are described, and data used by the CPU (11) and the CPU (11). A RAM (13) that temporarily stores programs executed in the program, and a ROM (15) that stores programs and font data that describe basic control related to startup processing and input / output processing, etc. A non-volatile memory includes a flash memory (17) for storing map data change information, which will be described later. These CPUs (11) and the like are connected via a bus (not shown).

  The recording medium (19) stores map data used for drawing the guidance screen and route search, and a program describing the operation procedure of the navigation device. The control unit (5) reads out and executes this program from the recording medium (19) via the drive unit (21). As the recording medium (19), a hard disk or a memory card is used. The map data includes information on road nodes, links and types, information on traffic sign positions and types, information on locations and addresses of shops and facilities, information on map backgrounds, etc. . Further, the map data includes drawing parameters that are referred to when drawing the map, index data that is referred to in various searches, voice data that is used to generate the guidance voice, and the like. The control unit (5) uses part of the data necessary for the processing being executed by partially extracting it from the map data. For example, when a map is displayed, the control unit (5) takes out data related to the drawn area from the map data.

  The drawing unit (23) is an IC chip including a CPU dedicated to drawing, and creates image data such as a guidance screen and an operation screen displayed on the navigation device according to an instruction from the control unit (5). The image data created by the drawing unit (23) is sent to the display control unit (25) and stored in the RAM of the display control unit (25). The display control unit (25) sends an image display signal to the display unit (27) based on the image data, and a screen related to the image data is displayed in the display area of the display unit (27). An LCD, an organic EL display, or the like is used for the display unit (27).

  The camera unit (29) includes an imaging element such as a CCD or CMOS sensor, a photographing lens, and the like, and is mounted on the vehicle so as to photograph a landscape in front of the vehicle. The camera unit (29) is mounted inside the vehicle, for example, in the vicinity of the upper side of the windshield, and photographs the road on which the vehicle travels and the surrounding scenery. The camera unit (29) repeats shooting periodically (or according to an instruction from the control unit (5)), and the image data of the shot image is sequentially stored in the RAM of the image processing unit (31), and In the image processing unit (31), various image processing such as brightness correction is performed.

  The operation unit (33) includes a hard key such as a power key for turning on / off the power and a touch panel arranged on the display area of the display unit (27). From the unit (33) to the control unit (5) via the interface unit (35). The sound source circuit unit (37) generates an analog audio signal for route guidance based on the audio data sent from the control unit (5). The generated analog audio signal is reproduced by the speaker (39).

  FIG. 2 is an explanatory diagram illustrating an example of an image photographed by the camera unit (29) of the navigation device according to the present embodiment. Managers of facilities such as museums and parks, and store owners of convenience stores, etc., signboards (51) (53) (55) that introduce facilities and stores on roads that pass next to or near those facilities and stores. It is installed along the roadside. These signboards (51), (53), and (55) are arranged so that they can be recognized from the inside of the vehicle traveling on the road.

  The facility “AAA” is a facility newly built next to the road, and a two-dimensional code (57a) indicating information on the facility “AAA” is attached to the signboard (51). For example, a QR code (registered trademark) shown in FIG. 3 is used as the two-dimensional code (57a) (and other two-dimensional codes (57b-57f) described later). Other two-dimensional codes such as color codes may be used in the present invention. Note that the QR code in FIG. 3 is shown merely for the purpose of explaining the two-dimensional code, and the specific content is irrelevant to the present invention.

  The store “BBB” is a store that is newly operating on the side of the road shown in FIG. 2 in place of the store “DDD” that was operating before the store “BBB” started operating. is there. A two-dimensional code (57b) indicating information on the store “BBB” is attached to the signboard (53). The store “CCC” is a store that has been operating on the side of the road. A two-dimensional code (57c) indicating information on the store “CCC” is attached to the signboard (55).

 The two-dimensional codes (57a) and (57b) are attached to the signboards (51) and (53) for the purpose of giving the navigation device the map data change information recorded in the recording medium (19) of the navigation device. Yes. The two-dimensional code (57a) includes information on the name, address, telephone number, latitude / longitude (and / or map code) and type of the new facility “AAA”, and the two-dimensional code (57b) The same information regarding the store “BBB” is included. The information indicated by the two-dimensional code (57a) (57b) includes store opening hours, parking availability, store / facility overview, store / facility advertisement / advertisement, facility / store building information (floor, site area) Etc.) may be included. The two-dimensional code (57c) is intended to give store advertisement / advertisement information to the navigation device, and includes, for example, advertisement / advertisement information related to products sold by the store “CCC”.

  The image shown in FIG. 2 includes a signboard (59) indicating traffic information. This signboard (59) is installed for the purpose of providing traffic information related to traffic jams, traffic closures, required times, traffic regulations, road surface conditions, etc. to navigation devices using two-dimensional codes (57d) (57e) (57f). Yes. These two-dimensional codes (57d), (57e), and (57f) need to be changed frequently, including non-display. Therefore, the two-dimensional codes (57d), (57e), and (57f) are preferably displayed using a display device that uses an LED or the like provided on the signboard (59). The traffic information provided via the two-dimensional code (57d) (57e) (57f) is preferably relatively detailed information that is difficult to instantly understand. This is because information that can be expressed with a small number of characters is sufficient to be displayed as a character string on the signboard (59).

  When the camera unit (29) captures the image shown in FIG. 2 while the vehicle is traveling, the image data is processed by the image processing unit (31) and then analyzed by the control unit (5). The control unit (5) determines whether or not the captured image includes a two-dimensional code. When the two-dimensional code is included in the image, the control unit (5) reads the two-dimensional code and obtains the obtained information ( Store in RAM (13). Further, the control unit (5) determines whether the obtained information is map data change information related to the change of map data, or information displayed in real time such as store advertisement / advertisement information or traffic information. . For example, by including identification information for identifying the type of information in the two-dimensional code, it is easy to determine whether the information indicated by the two-dimensional code is map data change information or information displayed in real time. Made. When the obtained information is map data change information, the control unit (5) stores the map data change information in the flash memory (17). Map data change information is stored in the flash memory (17) as the vehicle travels. The accumulated map data change information is referred to when the navigation device displays a map, and a map reflecting the changed items is displayed on the display unit (27). When the obtained information is information to be displayed in real time, the control unit (5) performs processing for immediately displaying the information as character information.

  FIG. 4A is an example of a guidance screen displayed on the display unit 27 of the navigation device of the embodiment. The image shown in FIG. 2 is taken by the camera unit 29, and the navigation device The guidance screen after performing the reading operation of the two-dimensional code (57a-57f) included in the image and the display operation of the real-time character information using the information of the two-dimensional code (57a-57f) is shown. ing. A map (71) around the vehicle is drawn on most of the guidance screen, and the map (71) includes an icon (73) indicating the vehicle position, a figure (75) (77) indicating the store, A line (79) indicating a road is included. Since the map data recorded in the recording medium (19) has information such as the store name, address and latitude / longitude regarding the store “CCC”, the graphic indicating the store “CCC” that has been operating since before (75) is included in the map (71). The figure (77) represents the store “DDD” that has been operating in the past. This is because the map data has information related to the store “DDD”. Note that the map (71) does not include a graphic representing the facility “AAA” because the map data is not included in the information about the facility “AAA”.

  In the guidance screen, in the area on the right side of the map (71), the advertisement / advertisement information and traffic information of the store or facility obtained from the two-dimensional code included in the photographed image is shown as character information. A character string (91) representing traffic information indicated by the two-dimensional code (57d) (57e) (57f) is displayed above the area, and a two-dimensional code (57c) is displayed below the character string (91). A character string (93) representing the advertisement / advertisement information indicated by is arranged. Note that another screen displaying these character strings (91) and (93) may be displayed on the display unit (27) by operating the operation unit (33).

  FIG. 4B shows a display unit (27) when the vehicle equipped with the navigation device of this embodiment travels again on the road shown in the image of FIG. 2 after the image of FIG. 2 is taken. The guidance screen displayed on is shown. In the flash memory (17) of the control unit (5), map data change information read from the two-dimensional codes (57a) and (57b) shown in FIG. 2 is stored, and the map data change information is stored in the flash memory (17). Reference is made when the map (71) of the guidance screen of FIG. 4 (b) is drawn. A graphic (81) representing the facility “AAA” is added to the map (71), and the graphic (77) is changed to indicate the store “BBB” instead of the store “DDD”. The character string (91) on the right side of the map (71) indicates the current traffic information based on the two-dimensional codes (57d) (57e) (57f) currently indicated on the signboard (59).

  In FIG. 4B, a line (83) indicating a new road is added to the map (71). Since the map data does not have information regarding this road, the line (83) is not drawn on the map (71) of FIG. Signs with a two-dimensional code including map data change information relating to the road are installed at each position defining a road node along the road of the new road. When the vehicle equipped with the navigation device of this embodiment travels on the road (for example, travels after the image of FIG. 2 is taken), the map (71) shown in FIG. 4B is drawn. The map data change information of these two-dimensional codes is already stored in the flash memory (17) of the control unit (5). The line (83) is added to the map (71) by referring to the map data change information when the map (71) is drawn. Map data change information about the road includes information on the name of the road, the latitude and longitude of the node (and / or map code), node attributes, road type, number of lanes, signal, road width, tunnel, speed limit, height difference, etc. And information on links related to the node.

  The two-dimensional code may indicate map data change information regarding road signs. For example, a map containing the new road sign, the contents of the sign (for example, speed limit, parking prohibition, temporary stop, U-turn prohibition, etc.) and the latitude and longitude (and / or map code) of the road sign By installing a signboard with a two-dimensional code indicating data change information, it is possible to display a map showing a new road sign. Further, in the navigation device of the present embodiment, the map data change information stored in the flash memory (17) is used not only for drawing a map but also for setting a destination, searching for a route, searching for a facility or a store, etc. .

  FIG. 5 is a flowchart showing the procedure of the information acquisition operation of the two-dimensional code in the navigation device of the present embodiment. The program describing this procedure is read from, for example, the recording medium (19) and executed by the control unit (5). As described above, while the vehicle is traveling, the camera unit (29) of the navigation device repeatedly captures the scenery in front of the vehicle. When the camera unit (29) performs photographing (S1), the control unit (5) analyzes the image data processed by the image processing unit (31), and the photographed image includes a two-dimensional code. It is determined whether or not (S3). If the two-dimensional code is not included in the image, the process relating to the acquisition of the two-dimensional code information is not performed until another photographing is performed (S1). When the photographed image includes a two-dimensional code, the control unit (5) reads the two-dimensional code, restores the information represented by the two-dimensional code to, for example, character data, and stores the RAM. Store in (13) (S5). As shown in FIG. 2, a photographed image may include a plurality of two-dimensional codes. In that case, the steps from step S5 to step S11 described later are performed in two-dimensional codes included in the image. For each of the above.

  After step S5, the control unit (5) determines whether or not the data restored from the two-dimensional code in step S5 is data related to the map data change information (S7). When the data restored in step S5 is data related to the map data change information, the control unit (5) confirms whether or not the data is already stored in the flash memory (17) (S9). When the data restored in step S5 is not stored in the flash memory (17), the control unit (5) restores the restored data stored in the RAM (13), that is, data relating to the map data change information. Is stored in the flash memory (17) (S11). After step S11, the control unit (5) determines whether there is an unprocessed two-dimensional code (S13). Even when the restored data is stored in the flash memory (17), step S13 is performed after step S9. Further, when it is determined in step S7 that the data restored from the two-dimensional code in step S5 is not data related to the map data change information, step S13 is performed. If there is an unprocessed two-dimensional code, after step S13, the processes of steps S5 to S11 are performed on one of the unprocessed two-dimensional codes.

  When it is determined in step S13 that there is no unprocessed two-dimensional code, the control unit (5) displays the advertisement / advertisement information or traffic information of the store or facility restored from the two-dimensional code (information displayed in real time). It is confirmed whether or not data relating to) is stored in the RAM (13) (S15). When data relating to store advertisement / promotion information and / or traffic information is stored, the control unit (5) indicates the advertisement / promotion information and / or traffic information (stored in the control unit (5)). The font data of the character string is sent to the display control unit (25), and the display control unit (25) sends the character string indicating the advertisement / promotion information and / or traffic information to the display unit (27) so as to be superimposed on the guidance screen. It is displayed (S17). After step S17 or when it is determined in step S15 that information to be displayed in real time is not stored, step S1 and the subsequent steps are performed again.

  When the control unit (5) reads the two-dimensional code in step S5 and acquires new data related to traffic information, the control unit (5) erases the currently stored data related to traffic information and stores new data. Good. In addition, an upper limit is set on the number of store / facility advertisements / promotion information stored in the RAM (13) of the control unit (5), and the control unit (5) reads the two-dimensional code in step S5, If new data related to advertisement / promotion information is acquired, old data (related to advertisement / promotion information) may be erased from RAM (13) and stored as necessary so that this upper limit is not exceeded. Good. Data relating to advertisement / advertisement information and traffic information may be erased from the RAM (13) after a predetermined time has elapsed since it was stored. Further, by operating the operation unit (33), the advertisement / advertisement information and traffic information stored in the control unit (5) may be selectively displayed on the guidance screen.

  FIG. 6 is a flowchart showing the procedure of the guide screen display operation in the navigation device of this embodiment. The program describing this procedure is read from, for example, the recording medium (19) and executed by the control unit (5). Based on the current position of the vehicle, the control unit (5) extracts map data of the drawing area including the position from the map data of the recording medium (19) and stores it in the RAM (13) (S31). After step S31, the control unit (5) checks whether or not data relating to the map data change information is stored in the flash memory (17) (S33). When the data related to the map data change information is stored in the flash memory (17), the control unit (5) determines whether the map data change information is related to the drawing area (for changing the drawn map). Whether or not it is used is determined (S35). The map data change information includes the latitude and longitude (and / or map code) of the store, facility, road node, and traffic sign. In step S35, the control unit (5) It is determined whether the latitude and longitude (or map code) is included in the drawing area.

  When it is determined in step S35 that the referenced map data change information is related to the drawing area, the control unit (5) uses the data related to the map data change information to store the map stored in the RAM (13). A process of rewriting data is performed (S37). After step S37, or when it is determined NO in step S35, the control unit (5) performs step S35 or steps S35 and S37 for all the map data change information stored in the flash memory (17). It is determined whether it has been performed (S39). Step S35 or steps S35 and S37 are performed for each piece of map data change information stored in the flash memory (17).

  If it is determined in step S33 that the data relating to the map data change information is not stored in the flash memory (17), or in step S39, all the map data change information is processed in steps S35 or S35 and When it is determined that S37 has been performed, the control unit (5) performs a process of drawing the guidance screen and displaying it on the display unit (27) (S41). By the instruction from the control unit (5), the drawing unit (23) indicated the current position of the vehicle using the map data of the drawing area and the image data of various screen elements stored in the control unit (5). The image data of the guidance screen including the map is created, and the display control unit (25) displays the guidance screen on which the map is drawn based on the created image data on the display unit (27). The control unit (5) determines whether or not the guidance screen needs to be updated according to the change in the current position of the vehicle (S43). If it is determined that the update is necessary, step S31 and subsequent steps are performed. Again.

  In the navigation device of the present embodiment, in the display operation of the map near the destination and other maps, the same steps as steps S31 to S41 shown in FIG. 6 are performed, and the map reflecting the map data change information is displayed. It is displayed on the display unit (27).

  In the navigation device of the present embodiment, the map data stored in the recording medium (19) indicates the presence or absence of map data change information for each area, and further for each type of store, facility, road sign, and road. A flag may be set. For example, in the information acquisition operation of the two-dimensional code shown in FIG. 5, when the map data change information about the store is obtained from the two-dimensional code, the control unit (5) displays the map data about the store in the area including the store. The map data recorded on the recording medium (19) is rewritten so that the flag indicating the presence / absence of change information is turned on. In step S31 of the guidance screen display operation shown in FIG. 6, the map data including these flags is partially read out, and in step S33, a determination is made by referring to the flags. Further, in steps S35 and S39, only the map data change information of the type whose flag is on is referred to (for example, when only the store flag is on, only the map data change information related to the store is referred to).

  In the above-described example, there is a two-dimensional code for map data change information and a two-dimensional code for information displayed in real time such as advertisement / promotion information. The change information and information displayed in real time may be included. For example, a certain two-dimensional code may include map data change information related to a store and advertisement / advertisement information of the store. In the above description, a two-dimensional code indicating map data change information related to a new store or road is described, but in order to give the navigation device map data change information related to a store or road to be deleted from the map. In addition, a two-dimensional code may be used. For example, a two-dimensional code indicating map data change information for instructing deletion of the store may be attached to a signboard of a store that has stopped business. Further, the two-dimensional code of the signboard may be used to give map data change information regarding the relocation destination to the navigation device.

  In the above embodiment, the advertisement / advertisement information and traffic information of the store or facility are displayed as text information on the display unit (27) .However, the advertisement / advertisement information and traffic information are stored in the sound source circuit unit (37) and the speaker ( 39) may be used to notify the user as audio.

  The photographing means mentioned in the means for solving the problems are the camera section (29) of the above embodiment, the storage means is the flash memory (17), the code reading means is the image processing section (31), the control section ( 5) and the program executed by the control unit (5), the storage means is the recording medium (19), the drawing means is the control part (5), the program executed by the control part (5) and the drawing part (23 The display means corresponds to the control unit (5), the program executed by the control unit (5), the display control unit (25), and the display unit (27).

  The above description of the embodiments is for explaining the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof. Moreover, each part structure of this invention is not restricted to the said Example, Of course, a various deformation | transformation is possible within the technical scope as described in a claim.

It is a block diagram which shows the structure of the navigation apparatus which is an Example of this invention. It is explanatory drawing which shows an example of the image which the navigation apparatus which is the Example of this invention image | photographed. It is explanatory drawing which shows QR code. FIG. 4A is an explanatory diagram showing an example of a guidance screen of the navigation device according to the embodiment of the present invention, and FIG. 4B is a guidance screen including a map changed using map data change information. It is explanatory drawing which shows. It is a flowchart which shows the procedure of the information acquisition operation | movement of the two-dimensional code in the navigation apparatus which is an Example of this invention. It is a flowchart which shows the procedure of the display operation | movement of the guidance screen in the navigation apparatus which is an Example of this invention.

Explanation of symbols

(5) Control unit
(17) Flash memory
(19) Recording medium
(27) Display section
(29) Camera section
(51-59) Sign
(57a-57f) 2D code
(71) Guide screen
(91) (93) String

Claims (4)

Photographing means for repeatedly photographing an image in front of the vehicle;
Code reading means for reading the two-dimensional code included in the photographed image and storing the map data change information indicated by the two-dimensional code in the storage means;
Storage means for storing map data;
A navigation apparatus comprising: drawing means for drawing a map of the drawing area using drawing area data extracted from the map data and map data change information relating to the drawing area stored in the storage means.   The navigation device according to claim 1, wherein the map data change information is change information related to a store, a facility, a traffic sign, or a road. Photographing means for repeatedly photographing an image in front of the vehicle;
Code reading means for reading a two-dimensional code included in a photographed image and obtaining information indicated by the two-dimensional code;
A navigation device comprising display means for displaying information indicated by the two-dimensional code as character information.   The navigation apparatus according to claim 3, wherein the information indicated by the two-dimensional code is advertisement / advertisement information of a store or a facility, or traffic information.

Images