JP3836278B2 - Navigation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a navigation device that displays route guidance on a screen based on map data in a traveling vehicle, and particularly relates to a technical field of a navigation device that can display a three-dimensional image of an intersection on a route.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, navigation devices that detect the current position of a vehicle and display the detected current position together with surrounding road maps on a display screen to provide route guidance have been widely used. When this type of navigation device is used, the vehicle occupant can visually recognize the road map displayed on the display screen and grasp the position of the traveling vehicle.
[0003]
On the other hand, the road map displayed on the display screen is generally planar, but in order to visually identify the intersection on the travel route, a three-dimensional intersection is displayed with the position of the passenger as a viewpoint. It is requested. By viewing such a three-dimensional display, the passenger can determine an intersection that should be turned accurately when, for example, turning right or left at the intersection.
[0004]
[Problems to be solved by the invention]
In the conventional navigation device described above, in order to realize a stereoscopic image display of an intersection, for example, a method is adopted in which a photograph image of an intersection is converted into data and stored in a storage unit, and the photograph image of the intersection is displayed on a display screen.
[0005]
However, in such a method, if photographic image data for a large number of intersections is prepared, the amount of data becomes very large. Moreover, if a moving image corresponding to the movement of the vehicle is to be displayed, it is necessary to prepare as much photographic image data as that, which is restricted in terms of the capacity of the storage means.
[0006]
On the other hand, it is conceivable to perform 3D display by texture mapping processing using a 3D wireframe model near the intersection. However, since there are many structures such as buildings near the intersection, the required texture mapping processing increases significantly. However, it takes a lot of time for image processing.
[0007]
As described above, the conventional navigation device has a problem in that a three-dimensional intersection image cannot be displayed by simple processing using data that can be stored in the storage unit.
[0008]
Therefore, the present invention has been made in view of such problems, and provides a navigation device that can improve visibility by displaying a stereoscopic image of an intersection by simple image processing in a running vehicle. The purpose is to do.
[0009]
[Means for Solving the Problems]
In order to solve the above-described problem, a navigation device according to claim 1 includes a current position detection unit that detects a current position of a vehicle, a map data storage unit that stores map data, and the current position and the map data. Display means for displaying route guidance to the destination based on , A navigation device comprising the map data Corresponding to each of multiple approach directions at the intersection A pasting surface storage means for storing three-dimensional arrangement data of a pasting surface of a road side; and image data pasted on the pasting surface. , Said Corresponding to each of multiple approach directions at the intersection Image data storage means for storing in association with the pasting surface of the road side surface, detecting a road from the current position, and extracting image data associated with the pasting surface according to the traveling direction of the vehicle on the road Display control means for displaying.
[0010]
The navigation device according to claim 2 is the navigation device according to claim 1, wherein the image data storage means divides the structure area into a background area and fills the background area with a predetermined background color. Is memorized.
[0011]
According to a third aspect of the present invention, in the navigation device according to the second aspect, the background color is displayed in the same color as the upper surface portion of the display screen.
[0012]
The navigation device according to claim 4 is the navigation device according to claim 1, wherein the display control unit detects a road from the current position and corresponds to a pasting surface corresponding to a traveling direction of a vehicle on the road. The attached image data is extracted and a moving image is displayed according to the running of the vehicle.
[0013]
The navigation device according to claim 5 is the navigation device according to claim 1, wherein the pasting surface storage means is Said Near intersection Corresponding to each of the plurality of approach directions in The three-dimensional arrangement data of the pasting surface of the road side surface is stored, and the display control unit compares the positional relationship between the current position data from the current position detecting unit and the intersection, and the vehicle is within a predetermined distance. In this case, the image data associated with the pasting surface corresponding to the traveling direction of the vehicle on the road is extracted and displayed.
[0014]
The navigation device according to claim 6 is the navigation device according to claim 1, wherein the pasting surface is Said Within a specified range from the center of the intersection Said multiple approaches in direction Corresponding to each of On the road Respectively 2 facing One It is defined as a rectangular region on the side surface of
[0015]
The navigation device according to claim 7 is the navigation device according to claim 1, wherein the map data storage unit stores road width information of a road, and the pasting surface storage unit stores the road width information according to the road width information. The image position of the pasting surface is calculated.
[0016]
The navigation device according to claim 8 further includes display data superimposing means for superimposing data based on predetermined information on display data displayed by the display control means in the navigation device according to claim 1. It is characterized by.
[0017]
The navigation device according to claim 9 is the navigation device according to claim 8, wherein the display data superimposing means superimposes lane display data based on lane information.
[0018]
The navigation device according to claim 10 is the navigation device according to claim 8 or 9, wherein the display data superimposing means superimposes the traveling direction guidance display data based on the set route. .
[0019]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.
[0020]
FIG. 1 is a diagram illustrating a schematic configuration of a navigation device according to the present embodiment. 1 includes a control unit 11, a map data storage unit 12, an intersection image data storage unit 13, a sensor unit 14, a current position detection unit 15, a display 16, a speaker 17, and image processing. Part 18.
[0021]
In the above configuration, the control unit 11 controls the operation of the entire navigation device. The control unit 11 includes a CPU and the like, reads out and executes a control program stored in a ROM (not shown), sends control signals to each component of the navigation apparatus, and inputs / outputs data. The control unit 11 also functions as a display control unit of the present invention, and controls the operation of three-dimensional image processing executed by the image processing unit 18 described later and the display timing of the display 16.
[0022]
The map data storage unit 12 is a memory having a large storage capacity for storing map data. For example, a CD-ROM or a DVD-ROM is used. The map data stored in the map data storage unit 12 includes road shape data, name data, background data, and the like. Further, the map data storage unit 12 functions as a pasting surface storage unit of the present invention, and the position data of a plurality of display intersections to be subjected to three-dimensional display based on the intersection display processing according to the present invention and pasting surfaces described later. The three-dimensional arrangement data is stored along with the map data.
[0023]
In addition to the crossroads, the display intersection includes a 3-way, a 5-way, a branch point, a junction, and the like.
[0024]
The intersection image data storage unit 13 is a memory for holding intersection image data necessary for the intersection display processing according to the present invention, and functions as the image data storage means of the present invention. The intersection image data is constituted by texture data as image data necessary for displaying a three-dimensional intersection image on the display 16 corresponding to the plurality of display intersections stored in the map data storage unit 12 described above. The Details of the intersection image data will be described later.
[0025]
The sensor unit 14 includes various sensors necessary for detecting the current position of the vehicle. Specifically, it includes a vehicle speed sensor that detects the speed of the vehicle, a direction sensor that detects the amount of change in the direction of the vehicle, a GPS receiver that receives radio waves from a GPS (Global Positioning System) satellite, and the like. .
[0026]
The current position detection unit 15 calculates the current position of the vehicle based on the output signal from the sensor unit 14 and outputs current position data. The current position data is collated with the above-described map data by the control unit 11 and corrected by a map matching process or the like.
[0027]
The display 16 functions as a display unit of the present invention, and the map data is displayed in various modes under the instruction of the control unit 11, and the current position of the vehicle is displayed as a car mark superimposed on the map data. Further, when the vehicle enters the display intersection, a three-dimensional intersection image is displayed on the display 16 by image processing described later. The display 16 is composed of, for example, a CRT, a liquid crystal display element, or the like. In addition, guidance information along the route of the vehicle is output from the speaker 17 by voice.
[0028]
The image processing unit 18 performs 3D image processing for displaying a 3D intersection image using the intersection image data. The three-dimensional image data generated by the image processing unit 18 is output to the display 17 at predetermined intervals under the instruction of the control unit 11. As the image processing unit 18, an image processor corresponding to three-dimensional image processing can be used.
[0029]
Next, the basic concept of 3D image processing according to the present embodiment will be described with reference to FIGS.
[0030]
FIG. 2 is a diagram for explaining a display intersection that is an object of image display in the navigation device according to the present embodiment, and shows an example of the positional relationship between the display intersection in front of the traveling direction of the vehicle and the vehicle. In the present embodiment, for example, a visual field image viewed from a vehicle occupant at a position as shown in FIG. 2 is displayed on the display 16 as a three-dimensional moving image. Here, the map data stored in the map data storage unit 12 is a set of links and nodes, and the position data of the display intersection corresponds to one node to which a plurality of links are connected.
[0031]
In addition, as shown in FIG. 2, there are generally a plurality of buildings around the display intersection. In the present embodiment, an image of a structure such as a building in the surrounding area that characterizes a display intersection is three-dimensionally displayed to enhance the visibility of the display screen. In order to accurately display the visual field image viewed from the vehicle position of FIG. 2 in three dimensions, the vehicle position and the approach direction of the intersection are grasped based on the detection output of the current position detection unit 15 and the road width of the road is determined from the map data. It is necessary to determine.
[0032]
Here, in the positional relationship as shown in FIG. 2, the traveling direction of the vehicle is the direction of the display intersection, and there are structures such as buildings at both ends of the field of view. Therefore, in order to display a realistic scene of an intersection as a three-dimensional image, it is necessary to generate intersection image data including these structures. In this case, there is a method of preparing image data for each structure around the intersection, but the processing amount associated with the three-dimensional image processing becomes extremely large. Therefore, in the present embodiment, one side texture is prepared for each of the left side surface and the right side field of view from the center of the display intersection to the vehicle position, and these are predetermined on the display screen by texture mapping processing described later. The three-dimensional intersection image is displayed by pasting it at the position.
[0033]
Next, FIG. 3 is a diagram for explaining a texture mapping process used in the three-dimensional image processing according to the present embodiment. In FIG. 3, a cube is assumed as an object for three-dimensional display, and this is converted into data as three-dimensional shape data 20. The three-dimensional shape data 20 can be specified by defining the three-dimensional coordinates of each vertex of the cube, for example. Then, a predetermined pasting surface 20 a to which the texture is pasted is defined for the three-dimensional shape data 20. A texture mapping process is performed by pasting a two-dimensional texture 21 on which a two-dimensional shape or pattern is drawn on the pasting surface 20a.
[0034]
The texture 21 shown in FIG. 3 shows a case where the shape is a square, but the two-dimensional shape of the pasting surface 20a changes variously according to the viewpoint of viewing the three-dimensional shape data 20. For example, in the case of FIG. 3, the pasting surface 20a has a parallelogram two-dimensional shape. Therefore, it is necessary to perform texture mapping processing by enlarging / reducing or deforming the texture 21 in accordance with the two-dimensional shape of the pasting surface 20a.
[0035]
Further, in the present embodiment, since the viewpoint from the vehicle occupant is considered, the arrangement and shape of the pasting surface 20a change from moment to moment as the vehicle moves. Therefore, when a three-dimensional intersection image is displayed as a moving image, the texture mapping process using the texture 21 must be executed in a short time, and the moving image is displayed in real time.
[0036]
FIG. 4 is a diagram schematically showing one corner of the display intersection according to the present embodiment. As shown in FIG. 4, in this embodiment, a three-dimensional area including a plurality of structures existing at one corner of a display intersection is set, a pasting surface 31 that is a rectangular area facing one road, and the other road An affixing surface 32, which is a rectangular area facing, is defined. Then, two pasting surfaces are defined at four diagonals of the display intersection, and eight pasting surfaces are defined in total. The three-dimensional arrangement data of these pasting surfaces is stored in the map data storage unit 12 in association with the position data of the display intersection. As will be described later, the pasting surface to be processed is selected and used in accordance with the intersection approach direction of the vehicle.
[0037]
As shown in FIG. 4, when the vehicle enters the display intersection in the direction A, the pasting surface 31 is a range that can be seen on the left side surface portion of the visual field image. A side texture 41 obtained by converting a characteristic two-dimensional shape or pattern image of a building or the like into data is pasted on the pasting surface 31. Similarly, when the vehicle enters the display intersection in the direction B, the pasting surface 32 in FIG. 4 is a range that can be seen on the right side surface portion of the visual field image. A side texture 42 is affixed to the affixing surface 32.
[0038]
The side textures 41 and 42 are divided into structure regions 41a and 42a set in a range surrounding a structure such as a building, and background regions 41b and 42b set in a range where no structure exists. In the side texture 41 of FIG. 4, a set of three rectangular areas surrounding three buildings is the structure area 41a, and in the side texture 42, a set of two rectangular areas surrounding the two buildings is the structure area 42a. And the area | regions other than the structure area | regions 41a and 42a in the side surface textures 41 and 42 respond | correspond to the background area | regions 41b and 42b (it shows with the oblique line in the figure). These background areas 41b and 42b are filled with a predetermined background color. The background color may be transparent. In this case, the color information is not given to the background areas 41b and 42b. Note that the structure regions 41a and 42a may be set in a region surrounding the structure even if the structure has a complicated shape (for example, a tree).
[0039]
FIG. 5 is a diagram illustrating eight side textures corresponding to one display intersection. As described above, a total of eight pasting surfaces are defined for display intersections, and it is necessary to prepare side textures to be pasted on all of them using a texture mapping process. Therefore, as shown in FIG. 5, a total of eight side textures 41 to 48 are set as image data of one display intersection, and are stored in the intersection image data storage unit 13 in association with the map data.
[0040]
In FIG. 5, four directions A, B, C, and D are conceivable as the approach directions of the vehicle to the display intersection. When the vehicle enters from the direction A, an image viewed from the right side corresponds to the side texture 48, and an image viewed from the left side corresponds to the side texture 41. When the vehicle enters from the direction B, an image viewed from the right side corresponds to the side texture 42, and an image viewed from the left side corresponds to the side texture 43. When the vehicle enters from the direction C, an image viewed from the right side corresponds to the side texture 44, and an image viewed from the left side corresponds to the side texture 45. When the vehicle enters from the direction D, an image viewed from the right side corresponds to the side texture 46, and an image viewed from the left side corresponds to the side texture 47.
[0041]
On the other hand, in addition to the side textures 41 to 48 on the left and right sides of the vehicle, it is necessary to display a lower surface portion such as a road and an upper surface portion such as the sky on the screen. However, since these generally have few visual features such as structures on the side of the road, it is not necessary to make them subject to texture mapping processing, and predetermined image data set in advance can be used.
[0042]
In addition, in order to set correctly the pasting position on the display screen of the side surface textures 41-48, it is necessary to acquire the road width information contained in map data. In the case of FIG. 5, one road at the display intersection has a road width W1 and the other road has a road width W2.
[0043]
In this embodiment, in order to display a visually distinctive road side image in the vicinity of an intersection, a texture mapping process is performed by selecting one of the side textures 41 to 48 to be displayed. Therefore, compared to the case where a structure such as a building is three-dimensionally modeled and texture mapping is applied to each surface, the number of textures subject to three-dimensional image processing is limited. It will be advantageous. For example, when the vehicle enters from the direction A, two side textures 41 and 48 can be targeted, or four side textures 41, 44, 45, and 48 can be targeted.
[0044]
Here, a method of creating texture data corresponding to the side textures 41 to 48 will be described. At the intersection shown in FIG. 5, an image of the road side surface is taken while traveling on one road and the other road by a vehicle equipped with two cameras facing the left and right road sides. All necessary photographing for the side textures 41 to 48 is performed while grasping the synchronization relationship between the positional information at the time of movement and the photographed image data. And the data part corresponding to the side surface textures 41-48 is extracted from image data as texture data. Alternatively, an all-round photograph may be taken from the center of the display intersection, and the side textures 41 to 48 may be cut out.
[0045]
At this time, for example, in the case of the side texture 41, the structure region 41a corresponding to the three buildings in FIG. 4 is defined based on the extracted texture data, and the other region is defined as the background region 41b. A process of painting with a predetermined background color is performed.
[0046]
The above-mentioned texture data is prepared for a plurality of preset display intersections among the intersections included in the map data stored in the map data storage unit 12. Then, in the intersection image data storage unit 13, texture data corresponding to, for example, eight side textures 41 to 48 is stored in one display intersection in association with the map data. For example, a bitmap data format can be used as these texture data.
[0047]
Next, specific intersection image display processing in the navigation device according to the present embodiment will be described with reference to FIGS. FIG. 6 is a flowchart illustrating a process of displaying a three-dimensional intersection image as a moving image on the display 16 when the vehicle approaches a predetermined display intersection. 7 and 8 are diagrams showing examples of display screens displayed on the display 16 by the process of FIG.
[0048]
When the display process shown in FIG. 6 is started, current position data indicating the current position of the vehicle is acquired from the current position detection unit 15 in step S1.
[0049]
In step S2, the acquired current position data is compared with the position data of a display intersection set in advance as a three-dimensional display target, and it is determined whether or not it is within a predetermined display range. That is, the display process may be performed when the vehicle is located in a range from the center of the display intersection to a short distance ahead and the vehicle is moving toward the intersection.
[0050]
When the determination result of step S2 is “NO”, the process returns to step S1 and continues to monitor the approach to the display intersection. On the other hand, when the determination result of step S2 is “YES”, the process proceeds to step S3, and texture data corresponding to the vehicle approach direction is read from the intersection image data storage unit 13. For example, when entering from the direction A in FIG. 5, if texture data corresponding to two of the side textures 41 and 42 or texture data corresponding to four of the side textures 41, 44, 45 and 48 is read out. Good.
[0051]
Next, in step S4, the viewpoint and display position for the pasting surface at the vehicle position are calculated. That is, since the pasting surface is one side of the three-dimensional shape data, the coordinates arranged on the display screen vary according to the viewpoint and the viewing direction based on the current position of the vehicle. Therefore, the viewpoint and field-of-view direction are calculated based on the intersection approach direction and relative distance of the vehicle, and correspondingly, by applying coordinate conversion to the three-dimensional arrangement data of the pasting surface, pasting in the field-of-view image The coordinates of the surface can be calculated.
[0052]
At this time, in addition to the current position data of the vehicle acquired in step S1, more accurate placement of the pasting surface can be determined based on road width information and the lateral relative position of the vehicle. Road width information of the road can be read and acquired from the map data storage unit 12, and the lateral relative position of the vehicle can be determined by, for example, mounting a CCD camera and taking a peripheral image.
[0053]
When a vehicle enters the vehicle, the road side surface may be photographed with a CCD camera to create each side texture, the area corresponding to each pasted surface may be taken in, deformed, and pasted onto each pasted surface for texture mapping. .
[0054]
In step S5, the texture mapping process of the side texture with respect to the pasting surface calculated in step S4 is performed. For example, in the case of the side texture 41 of FIG. 5, it may be pasted by performing processing such as enlargement / reduction and deformation so as to match the arrangement of the pasting surface. A texture mapping process is performed on each of the left and right side textures.
[0055]
Here, as shown in the example of the display screen of the three-dimensional intersection image in FIG. 7, the three-dimensional intersection image corresponding to the field of view of the passenger entering the display intersection is displayed on the display 16. The example of FIG. 7 shows a three-dimensional intersection image when a vehicle enters from a direction A to a display intersection where side textures 41 to 48 are set as shown in FIG. Further, it is assumed that a building is arranged around the display intersection in FIG. 7 as shown in FIG.
[0056]
In the example of the display screen of FIG. 7, a left side texture 41 and a right side texture 48 are displayed at the near end in the viewing direction. Further, a left side texture 44 and a right side texture 45 are displayed at the far end in the viewing direction on the other side of the road intersecting in front. Each of these side surface textures 41, 44, 45, and 48 is pasted to the image position based on the three-dimensional arrangement data of the corresponding pasting surface by texture mapping processing. As shown in FIG. 7, each side texture 41, 44, 45, 48 that is originally a rectangular shape is converted into a trapezoidal shape in a three-dimensional image, and is further reduced so that the scale becomes smaller in the distance. Recognize.
[0057]
Taking the side texture 41 of FIG. 7 as an example, a structure region 41a in which a building or the like is drawn and a background region 41b in which a background is drawn can be visually recognized. Since the structure area 41a is image data generated based on a photographic image or the like as described above, an actual building can be expressed realistically. In addition, since the background color can be freely set in the background area 41b as described above, the degree of freedom of display can be increased according to the situation.
[0058]
In the example of the display screen of FIG. 7, the case where a total of four side textures 41, 44, 45, 48 are displayed on each of the left and right sides is shown. You may make it display. When the current position of the vehicle is far from the center of the display intersection, the visibility of the three-dimensional intersection image can be improved in this way.
[0059]
Next, in step S6, the entire screen including the three-dimensional intersection image is displayed. That is, the entire image data including the upper surface portion 51 and the lower surface portion 52 in the display area other than the side textures 41, 44, 45, and 48 shown in FIG. 7 is generated and displayed on the display 16. Usually, sky is drawn on the upper surface portion 51, and a road surface is drawn on the lower surface portion 52. Further, if the background region and the upper surface of each side texture are unified with a common background color, a natural intersection image can be obtained.
[0060]
Here, in order to make the background region and the upper surface portion of each side texture the same color, the type of palette may be the same. That is, in the navigation device according to the present embodiment, in order to reduce the amount of color data, for example, each of R, G, and B is expressed using a numerical value of 8 bits. In this case, since palettes of 256 colors are defined, the same type of palette may be used.
[0061]
When step S6 is completed, the processing of steps S1 to S6 is repeated again, and the newly updated three-dimensional intersection image corresponding to the movement of the vehicle is continuously displayed. The period for updating and displaying the three-dimensional intersection image can be set as appropriate as long as the time required for the three-dimensional image processing is secured. As a result, the three-dimensional intersection image is displayed as a moving image on the display screen. This display process is continued while it is determined in step S2 that it is within the display range of the corresponding intersection.
[0062]
Note that the navigation device may acquire time information, determine day / night distinction and sun position, and adjust the brightness of the upper surface portion 51 and the background region 41b on the display screen. Further, the weather information or the like may be received, and the brightness and color may be adjusted according to the weather condition such as sunny or cloudy. Thereby, the visibility of a three-dimensional intersection image improves more.
[0063]
Next, FIG. 8 is an example of a display screen when various types of information are superimposed and displayed on the three-dimensional intersection image of FIG. In the example of FIG. 7, a lane display and a traveling direction guidance display are superimposed on the lower surface portion 52. That is, on the lower surface portion 52, a line indicating a road that intersects with three lines that divide a road surface having four lanes in both directions is displayed, and an arrow indicating that the vehicle should turn right at a front intersection is displayed. Yes. Since the passenger can visually recognize the superimposed display in this way, the convenience of route guidance can be further enhanced.
[0064]
Here, the number of lanes is determined based on road lane information held in the map data storage unit 12, and when there are a plurality of lanes, the travel lane is determined based on the lateral relative position of the vehicle described above. Can do. In addition, by comparing the route to the destination with the current position, it is possible to determine the arrow direction of the guidance display indicating a right turn or a left turn at the display intersection. According to these judgment results, appropriate display data such as preset lane display data and traveling direction guidance display data is added to the three-dimensional image data of the display intersection, and the display screen is superimposed. The control unit 11 and the image processing unit 18 together function as display data superimposing means of the present invention.
[0065]
As described above, according to the present embodiment, when a 3D intersection image is displayed, a pasting surface is defined at the road edge of the display intersection, and is divided into a structure area and a background area using a texture mapping process. Added side textures. Therefore, it is necessary to use an expensive image processing processor as compared with a case where a structure such as a building is made into a three-dimensional model and texture mapping is performed on each surface to perform three-dimensional image processing. Nor. Therefore, the three-dimensional intersection image can be displayed as a moving image by simple processing.
[0066]
As described above, the present invention has been described based on the embodiments, but the present invention is not limited to the above-described embodiments, and various improvements and modifications can be easily made without departing from the spirit of the present invention. It can be guessed.
[0067]
【The invention's effect】
As described above, according to the present invention, it is possible to reduce the time for three-dimensional image processing without using a complicated method, and to easily identify the intersection by the vehicle occupant and to provide a navigation device with excellent usability. It becomes possible.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic configuration of a navigation device according to an embodiment.
FIG. 2 is a diagram for explaining a display intersection that is a target of image display;
FIG. 3 is a diagram illustrating a texture mapping process.
FIG. 4 is a diagram schematically showing one corner of a display intersection according to the present embodiment.
FIG. 5 is a diagram illustrating eight side textures corresponding to a display intersection according to the present embodiment.
FIG. 6 is a flowchart showing intersection image display processing performed in the navigation device according to the present embodiment.
FIG. 7 is a diagram showing an example of a display screen displayed on the display of the navigation device according to the present embodiment.
FIG. 8 is a diagram showing an example in which various types of information are superimposed and displayed on a display screen displayed on the display of the navigation device according to the present embodiment.
[Explanation of symbols]
11. Control unit
12 ... Map data storage
13 ... Intersection image data storage unit
14 ... Sensor part
15 ... Current position detection unit
16 ... Display
17 ... Speaker
18. Image processing unit
20 ... 3D shape data
21 ... Texture
31, 32 ... Pasting surface
41-48 ... side texture
41a, 42a ... structure region
41b, 42b ... background area

Claims (10)

Current position detecting means for detecting a current position of the vehicle, comprising: a map data storage means for storing map data, and display means for displaying the route guidance until said current position and the destination based on the map data A navigation device,
A pasting surface storage means for storing three-dimensional arrangement data of a pasting surface of a road side surface corresponding to each of a plurality of approach directions at an intersection included in the map data;
An image data storing means for storing image data to be pasted on the attachment surface, in association with the attachment surface of the road side corresponding to each of the plurality of approach directions of each of the intersections,
Display control means for detecting a road from the current position and extracting and displaying image data associated with a pasting surface corresponding to the traveling direction of the vehicle on the road;
A navigation device comprising:   The navigation apparatus according to claim 1, wherein the image data storage means stores image data in which the background area is divided into a structure area and a background area and the background area is filled with a predetermined background color.   The navigation apparatus according to claim 2, wherein the background color is displayed in the same color as the upper surface portion of the display screen.   The display control means detects a road from the current position, extracts image data associated with a pasting surface according to the traveling direction of the vehicle on the road, and displays a moving image according to the traveling of the vehicle. The navigation device according to claim 1. The attachment surface storage unit stores the three-dimensional arrangement data of the pasted surface of the road side corresponding to the plurality of approach directions each in the intersection neighborhood,
The display control means compares the positional relationship between the current position data from the current position detection means and the intersection, and corresponds to the pasting surface according to the traveling direction of the vehicle on the road when the vehicle is within a predetermined distance. The navigation apparatus according to claim 1, wherein the attached image data is extracted and displayed. The bonding surface is in claim 1, characterized in that it is defined as a rectangular area of the two side surfaces respectively face the road corresponding from the center of the intersection s of the plurality of approach directions husband within a predetermined range The navigation device described.   The map data storage unit stores road width information of a road, and the pasting surface storage unit calculates an image position of the pasting surface according to the road width information. Navigation device.   The navigation apparatus according to claim 1, further comprising display data superimposing means for superimposing data based on predetermined information on display data displayed by the display control means.   The navigation device according to claim 8, wherein the display data superimposing unit superimposes lane display data based on lane information.   The navigation device according to claim 8 or 9, wherein the display data superimposing unit superimposes traveling direction guidance display data based on a set route.

Images