JP6086767B2 - Navigation device, navigation system, intersection guide program, and intersection guide method - Google Patents

Description

  The present invention relates to a navigation device, a navigation system, an intersection guidance program, and an intersection guidance method.

  A vehicle such as an automobile is equipped with a navigation device that guides a route to a destination and a map around the vehicle position. Some road maps displayed on the display display a three-dimensional image or data captured by an imaging camera in order to display an actual intersection or a realistic object close to the road.

  In the route guidance device of patent document 1, the road surface which shows the arrow displayed on the actual road surface provided corresponding to the approach link to the intersection (node) on the guidance route, the exit link for the entrance link, and the exit link By providing an intersection information storage unit that stores the marking information, and when the vehicle approaches the intersection, refer to the intersection information storage unit and display the road marking information associated with the approach link and the exit link. The discrepancy between the direction of the recognized road marking and the direction of the guidance voice recognized from the auditory sense is eliminated. In addition, the navigation device of Patent Document 2 prepares an intersection voice guidance setting screen, allows a user to select a guidance message for the intersection guidance map, and provides a guidance message according to his / her preference.

JP 2009-257796 A JP 2007-108001 A

  In the case of performing voice guidance at an intersection in a conventional navigation device, a guide code is generated by referring to link data in a map database prepared in advance and the angle difference between an entrance link and an exit link to the intersection, and corresponds to the guidance code. There is a way to output audio. FIG. 1 is a diagram for explaining an example of generating this guidance code. As shown in FIG. 1A, based on the guidance route, an entry link A entering the intersection P and an exit link B exiting the intersection P are specified, and then the angle difference θ between the entry link A and the exit link B is determined. calculate. The angle difference θ can be calculated based on the azimuth data included in the link data or the relative connection relationship of the link data. In the navigation device, a table that defines the relationship between the angle difference θ and the guidance code / guidance voice as shown in FIG. 1B is prepared, and the guidance code is specified with reference to this table. Here, the angle difference θ is classified into guidance codes indicating nine directions. For example, if the angle difference θ is 30 degrees, the guidance voice “oblique right” is output corresponding to the guidance code 2.

  However, when the guide code is generated by the above method, there are the following problems. Although it is desirable to express the link data stored in the map database with a resolution close to the actual intersection and its road shape, it takes a lot of work to process the link data and time, which is not realistic. For this reason, the link data approximates the actual road shape to a simple shape such as a straight line or a curve. As a result, if the number of roads connected to the intersection is large (for example, when the number of exit links is large) or the shape of the road connected to the intersection is complicated, the guide code generated from the link data Voice guidance may become inconsistent with the direction of travel at an actual intersection.

  In recent years, as disclosed in Patent Document 1, an increasing number of navigation devices use an image that represents an actual intersection in a realistic manner (hereinafter referred to as a real enlarged view) for intersection guidance. The real enlarged view is composed of, for example, imaging data obtained by imaging an intersection with an imaging camera or the like, and displays an actual intersection in real. The real enlarged map is associated with the node (intersection), and the road connected to the intersection of the real enlarged map is also associated with the link data and stored in the memory. Further, an arrow image is prepared in association with the real enlarged view, and this is also stored in the memory. At an intersection where a real magnified view exists, an approach link and an exit link on the guidance route are identified, and an arrow image corresponding to the link is displayed superimposed on the real magnified view.

  Such a real enlarged view accurately represents an actual intersection and road, and an arrow image displayed there is also an accurate guide. On the other hand, the guidance code generated from the link data may deteriorate in accuracy at a complicated intersection as described above, and causes the situation that the guidance display and the voice guidance in the real enlarged view do not coincide with each other at worst.

  FIG. 2 is a diagram for explaining an example in which the guidance display based on the real enlarged view does not coincide with the elder brother voice based on the guidance code. FIG. 2A shows a plan view of an actual intersection. An approach link A and two exit links B and C are connected to the intersection P. Here, it is assumed that the guide route to the destination passes from the entrance link A to the exit link B. FIG. 2B is a display of intersection guidance by a real enlarged view. In the intersection guidance based on the real enlarged view, roads respectively corresponding to the approach link A and the exit link B are identified, and an arrow image Y prepared in advance is selected based on the identification result, and the arrow image Y is displayed on the real enlarged view. It is displayed superimposed. As is clear from the figure, the arrow image Y in the real enlarged view urges the intersection P to proceed to the “left” road.

  FIG. 2C is link data representing the intersection of FIG. When voice guidance is performed from the angle difference θ between the approach link A and the exit link B, the angle difference θ is about 30 degrees as described with reference to FIG. 1, and the guide code “2” is selected. For this reason, the voice guidance prompts the user to proceed diagonally “right”, which is inconsistent with the guidance display by the real enlarged view.

  Some recent navigation systems include a main display 10 for a navigation device and a sub-display 20 for displaying information acquired from the navigation device. For example, the sub display 20 is arranged in the instruments panel together with meters. As shown in FIG. 2B, the main display 10 displays intersection guidance based on a real enlarged view, and the sub display 20 displays intersection guidance based on a simplified enlarged view. The sub-display 20 receives the guidance code generated by the method shown in FIG. 1 via an in-vehicle bus or the like, and displays an arrow image superimposed on a simplified enlarged view based on the guidance code. In such a navigation system, there may be a mismatch between the intersection guidance by the main display 10, the intersection guidance by the sub display 20, and the voice guidance by the speaker 30. That is, in the intersection guidance as shown in FIG. 2 (A), the guidance based on the real enlarged view guides the intersection to “left”, and the voice guidance by the speaker 30 and the intersection guidance by the sub-display 20 use the guidance code. In order to use it, guidance is given to advance the intersection “right”.

The present invention provides a navigation device, a navigation system, an intersection guidance program, and an intersection guidance method that solve such a conventional problem and prevent the mismatch between guidance display and guidance voice at an intersection.
Furthermore, the present invention provides a navigation device, a navigation system, an intersection guidance program, and an intersection guidance method for preventing inconsistency between image guidances when image guidance at a branch point such as an intersection is displayed on a plurality of displays. With the goal.

  The navigation apparatus according to the present invention approaches an enlarged view of an intersection that realistically represents an actual intersection and an arrow image indicating a traveling direction in the enlarged view of the intersection, and approaches an intersection on a guidance route to a destination. When selecting the intersection enlarged view and the arrow image from the storage means, the display means for displaying the intersection guidance in which the selected arrow image is superimposed on the selected intersection enlarged view, and the traveling direction of the intersection based on the intersection guidance. A guidance code generating means for generating a guidance code to be shown; guidance voice generating means for generating a guidance voice based on the guidance code; and voice output means for outputting the guidance voice generated by the guidance voice generating means.

  Preferably, the guide code generating means generates a guide code based on the selected arrow image. Preferably, the guide code generating means automatically generates a guide code corresponding to the arrow image stored in the storage means, and stores the generated guide code in association with the arrow image. Preferably, the guide code generation means generates a guide code by referring to management information in which a guide code is associated with the arrow image. Preferably, the intersection enlarged view is image data obtained by imaging the intersection.

  Another navigation apparatus according to the present invention includes a storage means for storing an enlarged view of an intersection that realistically represents an actual intersection and an arrow image indicating a traveling direction in the enlarged view of the intersection, and an intersection on a guidance route to a destination. When approaching, an enlarged view of an intersection and an arrow image are selected from the storage means, a display means for displaying an intersection guidance in which the selected arrow image is superimposed on the selected enlarged intersection view, and the progress of the intersection based on the intersection guidance Guide code generating means for generating a guide code indicating a direction, and guide code transmitting means for transmitting the guide code to an external display device.

  A navigation system according to the present invention includes an external display device and a navigation device that can be connected to the external display device. The navigation device includes an enlarged intersection view that realistically represents an actual intersection, and the navigation device. A storage means for storing an arrow image indicating the traveling direction in the enlarged intersection map, and an enlarged intersection map and an arrow image read out from the storage means when the vehicle approaches the intersection on the guidance route to the destination, and is selected. A first display means for displaying an intersection guidance in which the selected arrow image is superimposed on the enlarged intersection map, a guide code generating means for generating a guide code indicating an advancing direction of the intersection based on the intersection guidance, and the guidance A guide code transmitting means for transmitting a code to the external display device, wherein the external display device receives the guide code Comprising a signal means, and second display means for displaying the cross-hand guide based on the guidance code received.

Preferably, the navigation device further includes guide voice generating means for generating a guide voice based on the guide code, and voice output means for outputting the guide voice generated by the guide voice generating means. Preferably, the external display device further includes second storage means for storing a simple intersection guide map and an arrow image associated with the guide code, and the second display means is the guide received by the receiving means. Based on the code, the simple intersection guide map is selected from the second storage unit and displayed. Preferably, the navigation device further includes shape data generation means for generating shape data of the approaching intersection, the guide code transmission means transmits the shape data together with the guide code, and the external display device Creating a simple intersection guide map based on shape data, further comprising creating means for creating an arrow image based on the guide code, the receiving means receives the shape data together with the guide code,
The second display means displays the simple intersection guide map and the arrow image created by the creating means.

  The intersection guidance program executed by the navigation device according to the present invention includes a step of preliminarily storing an enlarged view of an intersection that realistically represents an actual intersection and an arrow image indicating a traveling direction in the enlarged view of the intersection; When an intersection on the guide route of the vehicle is approached, an enlarged view of the intersection and an arrow image are selected, an intersection guidance is displayed by superimposing the selected arrow image on the selected enlarged intersection, and an intersection is displayed based on the intersection guidance. Generating a guidance code indicating the traveling direction of the vehicle, generating a guidance voice based on the guidance code, and outputting the generated guidance voice.

  An intersection guidance method in a navigation device according to the present invention includes a step of preliminarily storing an enlarged view of an intersection that realistically represents an actual intersection and an arrow image indicating a traveling direction in the enlarged view of the intersection, and guidance to a destination When approaching an intersection on the route, an enlarged intersection map and an arrow image are selected, and an intersection guidance is displayed by superimposing the selected arrow image on the selected enlarged intersection map, and the intersection progresses based on the intersection guidance. Generating a guidance code indicating a direction; generating a guidance voice based on the guidance code; and outputting the generated guidance voice.

  According to the present invention, when performing intersection guidance using an enlarged intersection map that realistically represents an actual intersection and an arrow image that indicates the direction of travel in the enlarged intersection map, the guidance between the arrow image and the voice guidance is not consistent. Can be prevented. Furthermore, according to the present invention, when the intersection guidance is displayed on the external display device, it is possible to prevent the intersection guidance on the navigation device side and the intersection guidance on the external display device from being inconsistent.

It is a figure explaining the production | generation method of the guidance code of the conventional navigation apparatus. 2A is a plan view of an actual intersection, FIG. 2B is a diagram for explaining intersection guidance according to a conventional real enlarged view, and FIG. 2C is a link data of FIG. 2A. It is a figure explaining a shape. It is a figure explaining an example of the subject by the conventional navigation system. It is a figure explaining the structure of the navigation system which concerns on the Example of this invention. It is a block diagram which shows the structure of the navigation apparatus of a present Example. 6A shows an example of node data, and FIG. 6B shows an example of link data. It is a figure which shows an example of the management information of a real enlarged view and an arrow image. It is a figure explaining the arrow image utilized for a real enlarged view. It is a structural example of the function contained in the program part of the navigation apparatus of a present Example. It is a flowchart explaining the operation | movement of the intersection guidance in the navigation system based on the Example of this invention. It is a figure which compares the production | generation of the guidance code by the Example of this invention with the production | generation of the conventional guidance code. It is a block diagram which shows the structure of the external display apparatus by the Example of this invention. It is a figure which compares the intersection guidance by the Example of this invention with the conventional intersection guidance. It is a flowchart explaining the production | generation operation | movement of the guidance code by the 2nd Example of this invention. It is a flowchart explaining the production | generation operation | movement of the guidance code by the 3rd Example of this invention.

  An electronic system according to the present invention includes an electronic device mounted on a moving body such as a vehicle, and the electronic device has at least a navigation function. In addition to the navigation function, the electronic device may include other functions such as a function of reproducing audio data and video data, a function of receiving a television broadcast, and a data communication function. The electronic device may be installed in advance in the vehicle, or may be installed in a manner that is detachable from the vehicle. In the latter case, the electronic device can be a multifunctional portable terminal (smartphone), a laptop computer, a notebook computer, or other portable terminal.

  In a further preferred aspect, the electronic system can include an external display device connectable to the electronic device. The electronic device includes a main display for the navigation function, and the external display device includes a sub-display for the navigation function. When the intersection guidance is displayed on the main display, in response to this, the simplified intersection guidance is also displayed on the sub-display, and the intersection guidance sound is output. The user is presented with matching visual and auditory guidance information. In addition, the intersection in this specification includes every branch point where a road branches regardless of the presence or absence of a traffic signal, and the intersection guide is a guide formed by an intersection including such a branch point.

  FIG. 4 is a diagram showing the configuration of the navigation system according to the embodiment of the present invention. The navigation system 100 according to the present embodiment includes a navigation device 200, an external display device 300, and a connection unit 400 that connects the navigation device 200 and the external display device 300.

  The navigation device 200 may be mounted on the vehicle in advance or may be mounted on the vehicle in a detachable manner. For example, as shown in FIG. 3, the navigation device 200 includes a main display 10 disposed between a driver seat and a passenger seat in the vehicle, and a speaker 30 installed in the vehicle. For example, as shown in FIG. 3, the external display device 300 includes the sub display 20 in the instrument panel. The external display device 300 is connected to the navigation device 200 by the connection means 400, receives information from the navigation device 200, and displays various information on the sub display 20. For example, when the navigation device 200 presents an intersection guidance, the external display device 300 acquires information necessary for the intersection guidance from the navigation device 200 and displays the intersection guidance. The connection unit 400 is constituted by, for example, an in-vehicle bus, but may be other data communication units by wire or wireless communication.

  FIG. 5 is a block diagram illustrating a configuration example of the navigation device 200 according to the present embodiment. The navigation device 200 includes a vehicle position detection unit 210 that detects the current position of the vehicle, an input unit 220 that receives input from the user, an external I / F unit 230 that enables connection to the outside, a speaker in the vehicle, and the like. An audio output unit 240 that outputs audio, an image display unit 250 that displays an image on the main display 10, a storage unit 260 that stores various data, a program unit 270 that stores programs and software necessary for the navigation device, and a program Etc., and a control unit 280 for controlling each unit.

  As is well known, the own vehicle position detection unit 210 detects the absolute position of the own vehicle position using a GPS satellite, or uses a self-contained navigation sensor such as a gyro sensor or an acceleration sensor to detect the relative position of the own vehicle position. Detect position. The control unit 280 calculates the current position of the vehicle based on these detection results. The input unit 220 enables user input such as a remote control, voice input, and touch panel. The external I / F unit 230 establishes the connection unit 400 shown in FIG. 4 or establishes connections with other devices. The sound output unit 240 outputs sound such as intersection guidance through the speaker 30 installed in the vehicle. The image display unit 250 displays a road map around the vehicle position, and displays on the main display 10 intersection guidance on the guidance route.

  The storage unit 260 stores road map data necessary for navigation. In this embodiment, the road map data includes image data of a real enlarged view that realistically represents an actual intersection in addition to a map database including normal link data and node data. The real enlarged view is image data obtained by imaging an intersection with an imaging camera, for example. The image data has a predetermined format, resolution, and size, and is, for example, bitmap data or JPEG data. The real enlarged view may express the intersection two-dimensionally or may express three-dimensionally. Moreover, a real enlarged view may be prepared about all the intersections contained in road map data, and may be prepared about some intersections. Preferably, a real enlarged view is prepared for an intersection where the shape and number of roads are complicated.

  The road map data includes a set of link data and node data, and the real enlarged view is associated with the node data. For example, the node data includes a flag for identifying the presence or absence of a real enlarged view. If a real enlarged view is prepared, the flag of the node data is set to “1”. Set to “0”. FIG. 6A is a configuration example of node data, in order to identify node identification information for identifying node data, flag information for identifying the presence or absence of a real enlarged view, position information for an intersection, and a link connected to the intersection. Link connection information, information indicating the type of intersection, and the like. FIG. 6B is a configuration example of link data. The link data includes link identification information for identifying the link, node connection information for identifying the connection with the node, position information indicating the direction and position of the link, information indicating the type of the link, and the like.

  The storage unit 260 stores the image data of the real enlarged view as described above, and also stores the data of the arrow image used for the intersection guidance of the real enlarged view. The relationship between the real enlarged view and the arrow image is managed by management information as shown in FIG. 7, for example. That is, the management information is associated with the identification information for identifying the real magnified view, the identification information of the arrow image for identifying the arrow image used for the intersection guidance of the real magnified view, and the arrow image. It includes a guide code and storage location information (address information) in which a real enlarged view and an arrow image are stored. For example, intersection # 1 in the real enlarged view includes arrow images # 1 to # 3, arrow image # 1 has guide code 2, arrow image # 2 has guide code 1, and arrow image # 3 has guide code 3 Is assigned.

  On the other hand, for node data for which a real enlarged view is not prepared (flag “0”), the data of the intersection image and the arrow image created in advance based on the intersection node and the link connected to the intersection node are stored in the storage unit 260. Is remembered.

  When intersection guidance is performed at an intersection on the guidance route, a real enlarged view associated with the intersection is identified, and an entrance link and an exit link on the real enlarged view are identified based on the guidance route. A corresponding arrow image is selected from the relationship between the approach link and the exit link, and a guide code corresponding to the selected arrow image is selected. The guidance code is transmitted to the external display device 300 as will be described later, and is used for intersection guidance there. Furthermore, the guidance code is also used for the audio reproduction of the intersection guidance. When a real enlarged view is not prepared at an intersection to be subjected to intersection guidance, an intersection image created from an intersection node and a link and its arrow image are used.

  FIG. 8 shows an example of a link enlarged view and an arrow image used there. FIG. 8A is a display example of the arrow image Y1 when traveling from the entrance link 500 at the intersection to the exit link 510. FIG. When the entry link 500 and the exit link 510 are specified based on the guidance route, the corresponding arrow image Y1 is selected. Similarly, FIG. 8B shows an example of an arrow image Y2 when traveling from the entrance link 500 to the exit link 520, and FIG. 8C shows an arrow image Y3 when traveling from the entrance link 500 to the exit link 530. FIG. 8D shows an example of the arrow image Y4 when traveling from the entry link 500 to the exit link 540. As described above, when four escape links are connected to one real enlarged view, four arrow images are prepared in advance. Further, in the real enlarged view, if the approach link is different, the relationship with the escape link is different, so that an arrow image corresponding to the link can be prepared. Therefore, one real enlarged view may include a plurality of arrow images for each approach link.

  Refer to FIG. 5 again. The program unit 270 stores programs and software necessary for navigation executed by the control unit 280. FIG. 9 illustrates a typical program necessary for the navigation device 200. The program unit 270 is used for a route search unit 600 that searches for a guidance route from a departure point to a destination based on road map data, an intersection guidance display unit 610 that displays intersection guidance at intersections on the guidance route, and intersection guidance. A guide code generator 620 that generates a guide code from the real enlarged view and / or an arrow image, a guide code transmitter 630 that transmits the guide code to the external display device 300, and a guide voice generator 640 that generates a guide voice based on the guide code Have

  The guidance route searched by the route search unit 600 includes a set of link data and node data. When the vehicle approaches the intersection, the intersection guidance display unit 610 generates an image for intersection guidance and displays the image on the main display 10. The intersection guide display unit 610 determines whether or not a real enlarged view exists at the intersection with reference to the flag of the node data. If there is a real enlarged view, the intersection guidance display unit 610 is identified based on the real enlarged view and the entrance link and the exit link. An intersection guidance image (for example, an image as shown in FIG. 8) using the arrow image to be generated is generated and displayed. If there is no real enlarged view, the intersection image and the arrow image stored in the storage unit 260 are read, and this intersection guide image is generated and displayed.

  The guidance code generation unit 620 generates a guidance code based on the intersection guidance generated by the intersection guidance display unit 610. Preferably, the guide code is generated based on the arrow image displayed in the real enlarged view. However, you may make it produce | generate a guidance code from the relationship of the actual angle of the approach link and exit link in a real enlarged view. The guidance code identifies the directions of a plurality of traveling directions at the intersection. The number of directions identified by the guidance code is arbitrary, but for example, nine directions as shown in FIG. 1 are identified by the guidance code.

  The guidance code generated by the guidance code generation unit 260 is provided to the guidance code transmission unit 630 and the guidance voice generation unit 640. The guide code transmitting unit 630 transmits the generated guide code to the external display device 300. The guidance voice generation unit 640 generates guidance voice based on the guidance code, and the generated guidance voice is output by the voice output unit 240.

  FIG. 12 shows a configuration example of the external display device 300. The external display device 300 includes a guide code receiving unit 310 that receives the guide code transmitted by the guide code transmitting unit 630, a storage unit 320 that stores a simple intersection enlarged view and an arrow image associated with the guide code, and a guide. A simple intersection enlarged view and an arrow image are selected based on the code, and the display control unit 330 is configured to display them on the sub-display 30. If a nine-direction guide code as shown in FIG. 1 is used, the storage unit 320 stores an arrow image corresponding to the nine directions and a simple intersection enlarged view. An enlarged intersection view and an arrow image are selected.

  Next, the operation of intersection guidance in the navigation system of the present embodiment will be described. FIG. 10 is a flowchart for explaining the operation of intersection guidance according to this embodiment. First, a route to the destination is searched by the route search unit 600 (S100), and guidance of the guidance route is started (S102). A map around the vehicle position is displayed on the main display 10, and a guidance route is superimposed on the map. The road map screen is scrolled with the movement of the host vehicle, and when the host vehicle approaches the intersection on the guidance route, the intersection guidance display unit 610 identifies the target intersection and determines the presence or absence of the intersection guidance (S104). When it is determined that the intersection guidance is to be performed, the intersection guidance display unit 610 refers to the node data flag of the intersection and determines whether or not a real enlarged view exists (S106). If there is no real enlarged view, the intersection guidance is performed by the same method as in the prior art (S108). On the other hand, when a real enlarged view exists, the intersection guidance display unit 610 reads a real enlarged view corresponding to the intersection from the storage unit 260 and selects it (S110). Next, the intersection guidance display unit 610 identifies the approach link and the exit link on the guidance route in the real enlarged view (S112), reads the arrow images corresponding to the identified approach link and the exit link from the storage unit 260, This is selected (S114). Next, the intersection guidance display 610 displays the intersection guidance in which an arrow image is superimposed on the real enlarged view on the main display 10 (S116).

  On the other hand, the guide code generation unit 620 generates a guide code associated with the selected arrow image with reference to the management information in FIG. 7 (S118), and this guide code is externally displayed by the guide code transmission unit 630. It is transmitted to the device 300 (S120). When the external display device 300 receives the guide code, the external display device 300 selects a simplified intersection enlarged view and an arrow image corresponding to the guidance code, and causes the sub display 20 to display intersection guidance in which the arrow image is superimposed on the simplified intersection enlarged view. In addition, the guidance voice generation unit 640 generates a guidance voice corresponding to the guidance code and causes the speaker 30 to output the generated guidance voice.

  FIG. 11 is a comparative example of the guide code according to the present embodiment and the guide code according to the conventional method. The real enlarged view shown here is the same as the real enlarged view shown in FIG. When the guide route travels from the entrance link A to the exit link B, the arrow image has a shape that travels on a diagonally left road ahead. The guidance code generated from this arrow image is “9” in the nine-direction guidance code shown in FIG. 1, and the guidance voice is “left diagonally forward”. On the other hand, in the case of the conventional method, since the guide code is generated from the angle difference between the incoming link and the outgoing link of the link data, the guide code is “2” and the guide voice is “right diagonally forward”. .

  In addition, when proceeding from the entry link A to the exit link C, the arrow image of the present embodiment is shaped to travel on the road on the diagonal right side ahead, and the guidance code generated from the arrow image is “2”. The guidance voice is “right diagonally forward”. On the other hand, in the conventional method, the guidance code is “3”, and the guidance voice is “right turn”. Thus, since the guidance code of the present embodiment is generated from the arrow image based on the actual intersection, it is more accurate than the conventional guidance code.

  FIG. 13 is a comparative example of intersection guidance and conventional intersection guidance in the navigation system of the present embodiment. In the conventional method, as described in the problem of the prior art, in the intersection guidance by the main display 10, an arrow image in the left direction is displayed because a real enlarged view is used, but in the sub display 20 and the voice guidance, the guidance code is displayed. Since it is based on the link data, guidance in the right direction is performed, and the intersection guidance is inconsistent. On the other hand, in the present embodiment, the guidance code is generated from the arrow image in the real enlarged view, and the guidance display on the sub display and the guidance voice can be matched with the guidance display on the main display.

  Next, a second embodiment of the present invention will be described. The second embodiment relates to a method for automatically generating a guide code from an arrow image of a real enlarged view. FIG. 14 is a flowchart for explaining a guide code generation method according to the second embodiment. The guide code generation unit 620 identifies the real enlarged view from the storage medium storing the real enlarged view and the arrow image, for example, the storage unit 260 (S200), and extracts the arrow image associated with the real enlarged view (S202). . For example, as shown in FIG. 8, a plurality of arrow images are prepared in the real enlarged view according to the number of escape links.

  Next, the guidance code generation unit 620 performs pattern matching between the basic image pattern corresponding to each guidance code and the arrow image (S204). For example, when classifying into nine-direction guide codes as shown in FIG. 1, nine basic image patterns with different angle differences between the entrance link and the exit link are prepared, and pattern matching is performed between each basic image pattern and the arrow image. Done. In collation with all the basic image patterns, the basic image pattern having the highest degree of coincidence is selected (S206). Next, the guidance code generation unit 620 determines a guidance code corresponding to the selected basic image pattern and assigns it to the arrow image (S208). Thus, guide codes are determined for all the arrow images included in the real enlarged view (S210). When the guide codes for all the arrow images included in one real enlarged view are determined, the next real enlarged view is identified, and the guide codes for the arrow images included therein are generated in the same manner as described above ( S212). The guidance code automatically generated by such a flow is stored in the storage unit 260 as the guidance code of the management information shown in FIG.

  The number of intersections included in road map data may be in the thousands or tens of thousands. A real enlarged view and an arrow image used in the real enlarged view are prepared at all or some of these intersections. The operation of generating a guide code for each of the arrow images requires a lot of time and processes. According to the second embodiment, since the guide code for each arrow image in the real enlarged view is automatically generated, the work and time required for generating the guide code can be greatly reduced.

  In the above example, the guide code generation unit 620 automatically generates the guide code. However, when the storage medium storing the real enlarged view and the arrow image is connected to a device different from the navigation device. The guide code may be automatically generated by another processing device that executes a program for automatically generating the guide code. Then, the data relating to the real enlarged view and the arrow image including the automatically generated guidance code may be stored in the storage unit 260 of the navigation device after that.

  Next, a third embodiment of the present invention will be described. In the second embodiment, the guidance code is automatically generated in advance. However, in the third embodiment, the guidance code is automatically generated in response to the intersection guidance. Also good. FIG. 15 is a flowchart for explaining the operation of the third embodiment. As shown in the figure, when the intersection guidance is performed, a real enlarged view associated with the intersection is selected (S300), and then drawn on the real enlarged view from the relationship between the entrance link and the exit link based on the guidance route. The arrow image to be selected is selected (S302). Next, as in the second embodiment, the arrow image and the nine-direction basic image pattern are subjected to pattern matching, and the basic image pattern having the highest degree of coincidence is selected (S304), and this basic image pattern is supported. The guidance code to be determined is determined (S306). The guidance code thus obtained is transmitted to the external display device 300 as described in the first embodiment, and is also provided to the guidance voice generation unit 640 (S308).

  Next, a modified example of the external display device of this embodiment will be described. In the configuration shown in FIG. 12, the display control unit 330 has selected the simple intersection enlarged view corresponding to the guide code from the storage unit 320. However, the display control unit 330 is not limited to this, and the simple intersection enlarged view and / or the arrow image are It may be created by the display control unit 330. In this case, the navigation device 200 includes generation means for generating shape data related to the shape of the intersection to be guided, and the guidance code transmission unit 630 transmits the generated intersection to the external display device 300 in addition to the guidance code. To do. The shape data includes, for example, the number of links in the real enlarged view, the connection direction of the links, identification information of the entrance link and the exit link, and the like.

  On the other hand, the guide code receiving unit 310 receives the guide code and intersection shape data transmitted by the guide code transmitting unit 630, and the display control unit 330 creates a simple intersection enlarged view based on the received intersection shape data. Further, when generating an arrow image, an arrow image is created based on the received guidance code. Then, the display control unit 330 causes the sub-display 20 to display the created simple intersection enlarged view and arrow image composition.

  The present invention is not limited to the above embodiments, and various modifications and changes can be made within the scope of the gist of the invention described in the claims.

DESCRIPTION OF SYMBOLS 10: Main display 20: Sub display 100: Navigation system 200: Navigation apparatus 270: Program part 300: External display apparatus 400: Connection means 500: Entrance link 510, 520, 530: Exit link 600: Route search part 610: Intersection guidance Display unit 620: Guidance code generation unit 630: Guidance code transmission unit 640: Guidance voice generation unit

Claims (20)

Storage means for storing an enlarged view of an intersection that realistically represents an actual intersection and an arrow image indicating a traveling direction in the enlarged view of the intersection;
When approaching an intersection on the guidance route to the destination, display means for selecting an intersection enlarged view and an arrow image from the storage means and displaying the intersection guidance in which the selected arrow image is superimposed on the selected intersection enlarged view When,
Guidance code generating means for generating a guidance code indicating the traveling direction of the intersection based on the intersection guidance;
Guidance voice generating means for generating guidance voice based on the guidance code;
Voice output means for outputting the guidance voice generated by the guidance voice generation means ,
The guide code generating means generates a guide code based on the selected arrow image;
Navigation device. Storage means for storing an enlarged view of an intersection that realistically represents an actual intersection and an arrow image indicating a traveling direction in the enlarged view of the intersection;
When approaching an intersection on the guidance route to the destination, display means for selecting an intersection enlarged view and an arrow image from the storage means and displaying the intersection guidance in which the selected arrow image is superimposed on the selected intersection enlarged view When,
Guidance code generating means for generating a guidance code indicating the traveling direction of the intersection based on the intersection guidance;
Guidance voice generating means for generating guidance voice based on the guidance code;
Voice output means for outputting the guidance voice generated by the guidance voice generation means,
It said guide code generating means, said guide code corresponding to the stored arrow images in the storage unit automatically generates and stores the generated guided code in association with the arrow image, navigation device. Storage means for storing an enlarged view of an intersection that realistically represents an actual intersection and an arrow image indicating a traveling direction in the enlarged view of the intersection;
When approaching an intersection on the guidance route to the destination, display means for selecting an intersection enlarged view and an arrow image from the storage means and displaying the intersection guidance in which the selected arrow image is superimposed on the selected intersection enlarged view When,
Guidance code generating means for generating a guidance code indicating the traveling direction of the intersection based on the intersection guidance;
Guidance voice generating means for generating guidance voice based on the guidance code;
Voice output means for outputting the guidance voice generated by the guidance voice generation means,
It said guide code generating means generates a guidance code by referring to the management information guidance code to the arrow image is associated, navigation device. The navigation device according to any one of claims 1 to 3 , wherein the intersection enlarged view is image data obtained by imaging the intersection. Storage means for storing an enlarged view of an intersection that realistically represents an actual intersection and an arrow image indicating a traveling direction in the enlarged view of the intersection;
When approaching an intersection on the guidance route to the destination, display means for selecting an intersection enlarged view and an arrow image from the storage means and displaying the intersection guidance in which the selected arrow image is superimposed on the selected intersection enlarged view When,
Guidance code generating means for generating a guidance code indicating the traveling direction of the intersection based on the intersection guidance;
A guide code transmitting means for transmitting the guide code to an external display device ;
The navigation device , wherein the guide code generating means generates a guide code based on the selected arrow image . A navigation system comprising an external display device and a navigation device connectable to the external display device,
The navigation device
First storage means for storing an enlarged view of an intersection that realistically represents an actual intersection and an arrow image indicating a traveling direction in the enlarged view of the intersection;
When approaching the intersection on the guidance route to the destination, the intersection enlarged map and the arrow image read out from the storage means are selected, and the intersection guidance in which the selected arrow image is superimposed on the selected intersection enlarged map is displayed. First display means for displaying;
Guidance code generating means for generating a guidance code indicating the traveling direction of the intersection based on the intersection guidance;
A guide code transmitting means for transmitting the guide code to the external display device;
The external display device
Receiving means for receiving the guidance code;
A second display means for displaying the cross-hand guide based on the guidance code received seen including,
The guide code generating means generates a guide code based on the selected arrow image;
Navigation system. The navigation device further includes a guidance voice generation means for generating a guidance voice on the basis of the guide code, an audio output means for outputting a guidance voice generated by said guidance voice generation means, navigation claim 6 system. A navigation system comprising an external display device and a navigation device connectable to the external display device,
The navigation device
First storage means for storing an enlarged view of an intersection that realistically represents an actual intersection and an arrow image indicating a traveling direction in the enlarged view of the intersection;
When approaching the intersection on the guidance route to the destination, the intersection enlarged map and the arrow image read out from the storage means are selected, and the intersection guidance in which the selected arrow image is superimposed on the selected intersection enlarged map is displayed. First display means for displaying;
Guidance code generating means for generating a guidance code indicating the traveling direction of the intersection based on the intersection guidance;
A guide code transmitting means for transmitting the guide code to the external display device;
The external display device
Receiving means for receiving the guidance code;
Second display means for displaying the crossing guidance based on the received guidance code,
It said guide code generating means, said guide code corresponding to the stored arrow images in the storage unit automatically generates and stores the generated guided code in association with the arrow image, navigation system. A navigation system comprising an external display device and a navigation device connectable to the external display device,
The navigation device
First storage means for storing an enlarged view of an intersection that realistically represents an actual intersection and an arrow image indicating a traveling direction in the enlarged view of the intersection;
When approaching the intersection on the guidance route to the destination, the intersection enlarged map and the arrow image read out from the storage means are selected, and the intersection guidance in which the selected arrow image is superimposed on the selected intersection enlarged map is displayed. First display means for displaying;
Guidance code generating means for generating a guidance code indicating the traveling direction of the intersection based on the intersection guidance;
A guide code transmitting means for transmitting the guide code to the external display device;
The external display device
Receiving means for receiving the guidance code;
Second display means for displaying the crossing guidance based on the received guidance code,
It said guide code generating means generates a guidance code by referring to the management information guidance code to the arrow image is associated, navigation system. The navigation system according to any one of claims 6 to 9 , wherein the intersection enlarged view is image data obtained by imaging the intersection. The external display device
A second storage means for storing a simple intersection guide map and an arrow image associated with the guide code;
The said 2nd display means selects the said simple intersection guide map from the said 2nd memory | storage means based on the guidance code which the said receiving means received, and displays it as any one of Claim 6 thru | or 9. Navigation system. The navigation device
Further comprising shape data generation means for generating shape data of the approaching intersection,
The guide code transmitting means transmits the shape data together with the guide code,
The external display device
Creating a simple intersection guide map based on the shape data, further comprising a creation means for creating an arrow image based on the guide code,
The receiving means receives the shape data together with the guide code,
The navigation system according to any one of claims 6 to 9, wherein the second display means displays the simple intersection guide map and the arrow image created by the creation means. An intersection guidance program executed by a navigation device,
A step of storing in advance an intersection enlarged view that realistically represents an actual intersection and an arrow image indicating a traveling direction in the intersection enlarged view;
When approaching an intersection on the guidance route to the destination, selecting an enlarged intersection map and an arrow image, and displaying an intersection guide in which the selected arrow image is superimposed on the selected enlarged intersection map;
Generating a guidance code indicating an advancing direction of the intersection based on the intersection guidance;
Generating guidance voice based on the guidance code;
Outputting the generated guidance voice ,
The step of generating the guide code is an intersection guide program for generating a guide code based on the selected arrow image . The intersection guidance program according to claim 13 , further comprising a step of transmitting the guidance code to an external display device.
An intersection guidance program executed by a navigation device,
A step of storing in advance an intersection enlarged view that realistically represents an actual intersection and an arrow image indicating a traveling direction in the intersection enlarged view;
When approaching an intersection on the guidance route to the destination, selecting an enlarged intersection map and an arrow image, and displaying an intersection guide in which the selected arrow image is superimposed on the selected enlarged intersection map;
Generating a guidance code indicating an advancing direction of the intersection based on the intersection guidance;
Generating guidance voice based on the guidance code;
Outputting the generated guidance voice,
Step guidance code corresponding to the arrow image is automatically generated, the generated guidance code comprising storing in association with the arrow image, intersection difference point guidance program for generating the guidance code. An intersection guidance program executed by a navigation device,
A step of storing in advance an intersection enlarged view that realistically represents an actual intersection and an arrow image indicating a traveling direction in the intersection enlarged view;
When approaching an intersection on the guidance route to the destination, selecting an enlarged intersection map and an arrow image, and displaying an intersection guide in which the selected arrow image is superimposed on the selected enlarged intersection map;
Generating a guidance code indicating an advancing direction of the intersection based on the intersection guidance;
Generating guidance voice based on the guidance code;
Outputting the generated guidance voice,
Step, the guide cord to arrow image to generate a guidance code by referring to the management information is associated, intersection difference point guidance program for generating the guidance code. An intersection guidance method in a navigation device,
A step of storing in advance an intersection enlarged view that realistically represents an actual intersection and an arrow image indicating a traveling direction in the intersection enlarged view;
When approaching an intersection on the guidance route to the destination, selecting an enlarged intersection map and an arrow image, and displaying an intersection guide in which the selected arrow image is superimposed on the selected enlarged intersection map;
Generating a guidance code indicating an advancing direction of the intersection based on the intersection guidance;
Generating guidance voice based on the guidance code;
Outputting the generated guidance voice ,
The step of generating the guide code is an intersection guide method in which a guide code is generated based on the selected arrow image . 18. The intersection guidance method according to claim 17 , further comprising the step of transmitting the guidance code to an external display device. An intersection guidance method in a navigation device,
A step of storing in advance an intersection enlarged view that realistically represents an actual intersection and an arrow image indicating a traveling direction in the intersection enlarged view;
When approaching an intersection on the guidance route to the destination, selecting an enlarged intersection map and an arrow image, and displaying an intersection guide in which the selected arrow image is superimposed on the selected enlarged intersection map;
Generating a guidance code indicating an advancing direction of the intersection based on the intersection guidance;
Generating guidance voice based on the guidance code;
Outputting the generated guidance voice,
Step guidance code corresponding to the arrow image is automatically generated, the generated guidance code comprises the step of and store associated with the arrow image, intersection difference point guiding method for generating the guidance code. An intersection guidance method in a navigation device,
A step of storing in advance an intersection enlarged view that realistically represents an actual intersection and an arrow image indicating a traveling direction in the intersection enlarged view;
When approaching an intersection on the guidance route to the destination, selecting an enlarged intersection map and an arrow image, and displaying an intersection guide in which the selected arrow image is superimposed on the selected enlarged intersection map;
Generating a guidance code indicating an advancing direction of the intersection based on the intersection guidance;
Generating guidance voice based on the guidance code;
Outputting the generated guidance voice,
Step, the guide cord to arrow image to generate a guidance code by referring to the management information is associated, intersection difference point guiding method for generating the guidance code.

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