JP2005274344A - Navigation device, method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform consistent and proper display by stopping stereoscopic display on at least some buildings when the own car position is out of a road, in a navigation technology. <P>SOLUTION: A determination part 45 determines whether the own car position is in a road or out of the road regardless of the running/stopping state by collation with road map data. When the determination result is 'out of the road', a switching control part 46 allows a rendering part 44 to stop at least stereoscopic display of a building corresponding to the own car position. For example, the stereoscopic display of all buildings is stopped and may be changed into another display such as two-dimensional display, when the stereoscopic display is set. The consistent and proper display can be acquired and the situation can be grasped easily, by stopping the stereoscopic display of at least a building on the position overlapped with the own car position in this way, when the own car position is out of the road. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a navigation technique for performing appropriate display without contradiction by stopping stereoscopic display for at least some buildings when the vehicle position is outside the road.

  In recent years, with the advance of digital technology, the spread of navigation devices is remarkable. In the navigation device, road map data obtained by digitizing roads, place names, buildings, etc. on a map are stored in a storage medium such as a CD-ROM in the form of a database, etc., and designation of a destination is received based on that data, and the destination is designated. The optimal taxiway is searched and set. In addition, using the road map data, map matching is performed on the vehicle position estimated from self-contained navigation using gyroscopes and vehicle speed pulses, and radio navigation using GPS and FM multiplexing, and displayed on the surrounding map along with the taxiway Meanwhile, guidance guidance such as the direction of travel is output by synthetic voice output or the like.

In recent years, display functions in such navigation devices have been particularly diversified, and in addition to highway mode (display during high-speed traveling), intersection enlargement, three-dimensional (3D) display of buildings is frequently used.
JP 2000-112343 A JP 2002-323328 A

  Conventionally, in the stereoscopic display as described above, the buildings around the vehicle position are displayed in a translucent color (for example, Patent Document 1) from the viewpoint of easy road confirmation (for example, Patent Document 1). There has also been a proposal that can be turned off manually, and the stereoscopic display of the building can be turned off manually (for example, Patent Document 2).

  However, in the same way as the actual scenery, if you try to express a building or the like in three dimensions, it is difficult to express the transparent color because it is very different from the actual one, and if the display is uniformly stopped, the driver will actually see it from the car window. There was a problem that the discrepancy between the scenery and the display became large. In addition, if the vehicle is intentionally removed from the road to enter a parking lot, etc., or if the vehicle on the road is actually misdetected, etc. There was also a problem that the display was inconsistent and inappropriate, making it difficult to grasp the situation. The same problem occurs when the vehicle approaches a shielded structure such as a tunnel or underpass.

  The present invention solves the problems of the prior art as described above, and its purpose is to cancel the stereoscopic display for at least a part of the buildings when the vehicle position is outside the road. It is to provide navigation technology for displaying. Another object of the present invention is to provide a navigation technique for performing appropriate display without contradiction by stopping stereoscopic display of a building when the vehicle position is a shielding structure section.

  In order to achieve the above object, according to one aspect of the present invention (Claims 1, 6, and 11), a navigation device that uses road map data representing at least a road plane position, a plane position and a three-dimensional shape of a building. In the method or program, the computer detects the position of the vehicle, displays a three-dimensional building on the screen based on the road map data, determines whether the vehicle position is outside the road by collating with the road map data, When the determination result is out of the road, at least the three-dimensional display of the building corresponding to the vehicle position is stopped.

  In these aspects, when the vehicle position is outside the road, the stereoscopic display of the building at least (overlapping) with the vehicle position is stopped, so that the display is appropriate without any contradiction and it is easy to grasp the situation.

  In another aspect of the present invention (Claims 2, 7, and 12), the computer further determines whether the vehicle position is in a building by collating with the road map data, and when the result is in the building, the road It is characterized by determining outside.

  In these modes, since the 3D display is canceled when the vehicle position is in the building, the 3D display is displayed even if the vehicle position slightly deviates from or returns to the road due to an error in a place with few buildings. It won't be difficult to see the screen when it is stopped or restarted.

  In another aspect of the present invention (Claims 3, 8, and 13), the computer may further stop the stereoscopic display of only buildings in a predetermined range around the vehicle position when the result of the determination is outside the road. Features.

  In these modes, the three-dimensional display of the building is stopped around the position of the vehicle to ensure the appropriateness of the display, while the three-dimensional display of the building is maintained for the other parts to maintain a realistic understanding. it can.

  In another aspect of the present invention (Claims 4, 9, and 14), at least the planar position of the road, the planar position and the three-dimensional shape of the building, and the shielding structure section where the ground building cannot be seen from the road. In a navigation apparatus, method or program using road map data representing a plane position, a computer detects the position of the vehicle, displays a three-dimensional building on the screen based on the road map data, and the road map data By collation, it is determined whether the own vehicle position is the shielding structure section, and when the determination result is the shielding structure section, the stereoscopic display of the building is stopped.

  In these modes, even if the vehicle is on the road, the 3D display of the building, etc., will be canceled if it is a shielded structure section where outside buildings such as tunnels and underpasses cannot be seen. It becomes easy to grasp the situation.

  In another aspect of the present invention (Claims 5, 10, and 15), the computer further uses data of information prepared in advance corresponding to each building, and the vehicle position is determined to be in the building. The information corresponding to the building and the fact that it is inside the building are output.

  In these aspects, the name of the building is output when entering the parking lot of a multipurpose office building, hotel, public building, company building, etc., so that the building is confused with the target building in an unfamiliar place Even if there are many, it is excellent in convenience of confirmation and the convenience is improved.

  As described above, in the present invention, when the position of the vehicle is outside the road, the navigation technology that performs appropriate display without contradiction by stopping the stereoscopic display for at least some buildings, that is, the navigation device, method, and program Can be provided.

  Next, a vehicle-mounted navigation device (referred to as “this device”), which is the best mode for carrying out the present invention, will be described with reference to the drawings. The present apparatus can be realized by a navigation program controlling a computer including a peripheral circuit and a peripheral apparatus, and can be grasped not only as an apparatus but also as a method and a program. In addition, I will not restate the things common to the past.

[1. Constitution〕
First, the configuration of this apparatus is shown in FIG. That is, the absolute position / azimuth detection unit 1 using GPS, the relative direction detection unit 2 using a gyroscope, etc., and the vehicle speed detection unit 3 for processing the vehicle speed pulse for the CPU are the position, direction (orientation), speed of the own vehicle. It is a group of sensors that provide navigation data related to The main CPU and its peripheral circuit (referred to as “CPU”) 4 use the memory group M as means for controlling the entire apparatus. A memory group M includes a ROM 5 that stores basic programs such as BIOS and startup routines, a dynamic RAM (DRAM) 6 for program areas and work areas, a static RAM (SRAM) 7 that backs up memory contents while the power is turned off, and a display. A video RAM (VRAM) 8 for the unit 10 is included.

  In addition, the apparatus includes a display unit 10 such as a liquid crystal panel that displays information such as a map and a menu, an input unit 11 such as a touch panel, a remote control unit, and a switch panel for a user to input various information, and these display units. 10 and an input unit 11 and a user interface unit 9 connecting the CPU 4. The disk control unit 12 is an auxiliary storage device using a storage medium such as an HDD (hard disk drive) or a CD-ROM, and is means for reading, for example, road map data from various databases in the storage medium. The road map data includes at least a plane position of a road, a plane position and a three-dimensional shape of a building (including a three-dimensional structure such as a bridge or a monument), a landscape or ground surface from a driver on a road such as a tunnel or an underpass. And information such as coordinates representing the planar position of the shielding structure section where the building cannot be seen.

  The FM multiplex broadcast reception and processing unit 13 and the optical / radio wave beacon reception and processing unit 14 are portions that receive data such as VICS from FM broadcast waves and roadside beacons and provide them to the CPU 4, respectively. Further, the CPU 4 realizes the functional elements (reference numerals 40 to 46) shown in FIG. 1 according to the program, and these functional elements use the above-described hardware portions of the present apparatus to perform the following functional operations. The means and process for achieving the above are realized and executed.

[2. Action)
[2-1. (Navigation process)
That is, the current position calculation unit 40 calculates the vehicle position from the navigation data from the sensor groups (1 to 3), and the drawing unit 44 uses the vehicle position and the road map data read from the disk control unit 12. Thus, the road section currently being traveled is specified by the conventional map matching method, and the surrounding map and the vehicle position on the road section are displayed on the display unit 10. In addition, the destination designation receiving unit 41 accepts designation of a destination by facility search or cursor designation on a map, and the route searching unit 42 interactively selects an optimum route to the destination based on the road map data. Searching and setting is performed by an algorithm such as search, and the guide unit 43 outputs guidance guidance such as a traveling direction along the route by a screen display through the drawing unit 44 or synthesized voice. The drawing unit 44 performs not only planar display of the map but also three-dimensional display of the building based on the road map data.

[2-2. Judgment and cancellation of 3D display)
Then, as shown in the flowchart of FIG. 2, the determination unit 45 determines whether the position of the vehicle is inside the road or outside the road, regardless of whether the vehicle is running or stopped, by comparing with the road map data (step 11). . When the determination result is outside the road (step 12), the switching control unit 46 causes the drawing unit 44 to stop the stereoscopic display of the building corresponding to at least the vehicle position. For example, in the case of a setting for stereoscopic display (step 13), the stereoscopic display of all buildings may be stopped and switched to another display such as two-dimensional (step 14). As described above, when the vehicle position is outside the road, at least the three-dimensional display of the building that overlaps (overlaps with) the vehicle position is stopped, so that an appropriate display without contradiction is obtained and the situation can be easily grasped.

  In this case, the range in which the stereoscopic display is stopped is arbitrary, and the determination of whether the vehicle is outside the road based on the road map data may be performed based on whether the vehicle position matches the planar position or width of each road section. However, you may perform based on the plane position of a building.

  For example, in the example shown in the flowchart of FIG. 3, it is determined whether the vehicle position is within the coordinate range of the building based on the planar position and solid shape data of the building included in the road map data read from the disk control unit 12 (step 21) When this result is inside the building (step 22), it is determined that the road is out of the road, and if it is set to display stereoscopically (step 23), the stereoscopic display of only the building in the predetermined range around the vehicle position is stopped (step 24). ). In this way, by stopping the 3D display of the building only around the vehicle position, while maintaining the appropriateness of the display, the 3D display of the building is maintained for the other parts to maintain a realistic understanding. You can also.

  Further, in the example of FIG. 3, when it is determined that the inside of the building (steps 21 and 22), in addition to stopping the stereoscopic display of the surrounding buildings (steps 23 and 24), the storage medium of the disk control unit 12 corresponding to each building in advance. If there is data corresponding to the information such as the building name prepared in the above, the information and the fact that it is inside the building is output on a screen display or synthesized voice (step 25). In this way, for example, when a vehicle is put into a parking lot of a multipurpose office building, hotel, public building, company building, etc., the name of the building is output, so it is confusing with the target building in an unfamiliar place Even if there are many buildings, it is excellent for convenience of confirmation and the convenience is improved.

[2-3. (Judgment method of whether inside a building)
The determination as to whether or not the vehicle position is in the building is performed as follows, for example. First, FIG. 4 shows an example of 3D (three-dimensional shape) data of a building. As shown in this example, it is common that the three-dimensional shape of a building is represented by a polygon, and using the polygon information (two-dimensional information) on the bottom surface in the data in this case, it is determined whether the vehicle position coordinates are inside the building. I do. In addition, since the vehicle position is a two-dimensional coordinate point, the inside / outside determination of a building based on a bottom polygon that is a two-dimensional polygon will be described here. However, as an application, a three-dimensional coordinate point exists in a three-dimensional polygon. Whether to do or not can also be determined.

  The following outlines the process for determining whether a two-dimensional coordinate point is within a specified two-dimensional polygon. The following process is applied to all building data or each bottom polygon of building data within a predetermined distance from the vehicle position. By applying, it is possible to determine whether the vehicle is traveling in the building. As a condition for creating the bottom polygon that is the premise of this processing, it is assumed that each vector that sequentially connects the vertices of the polygon that becomes the bottom in a single stroke is stored counterclockwise based on the two-dimensional coordinates, It is assumed that it is not an intersecting polygon (for example, FIG. 5) but a normal polygon that does not intersect (for example, FIG. 6). Note that normal 3D polygons (surface data) are also created so that vertices are set in a counterclockwise or clockwise direction and do not intersect.

  Whether or not an arbitrary coordinate point in the two-dimensional coordinate is within the polygon as described above depends on the pattern of the intersection where the auxiliary line drawn from the coordinate point parallel to the x-axis and y-axis first intersects the vector constituting the polygon. Judgment is possible. In this respect, a conventional geometrical technique may be used, and only an example is shown here. For example, in the case of FIG. 7, paying attention to the x-axis (the left-right direction in FIG. 7), a line indicated by a broken line is extended from the coordinate point indicated by a black circle along the − direction and the + direction of the x coordinate, When confirmed, the vector G → A intersects the minus (left) direction and the vector A → B intersects the plus (right) direction. Further, since the coordinate point is in the left direction when viewed from the vector G → A and the left side when viewed from the vector A → B, it can be determined that the coordinate point is within the designated polygon in the x direction. That is, the counterclockwise vector is always inside the polygon on the left side, and it can be determined from the linear function corresponding to the vector and the direction of the vector whether the coordinate point is in the right direction or the left direction when viewed from a certain vector.

  Similarly, on the basis of a line parallel to the y-axis (vertical direction in FIG. 7), the coordinate point is the left direction when viewed from both vectors F → G and A → B that intersect first. It can be determined that it is inside the polygon. As described above, the coordinate points illustrated in FIG. 7 can be determined to be in the designated polygon in both the x and y directions. On the other hand, in the case as shown in FIG. 8, the above condition is not satisfied, and the coordinate point is located on the right side that means the outside of the polygon when viewed from each vector.

[3. effect〕
As described above, in the present embodiment, when the position of the vehicle is outside the road, the three-dimensional display of the building at least overlapping (overlapping) with the position of the vehicle is stopped. It becomes easy. In particular, in the present embodiment, not only the three-dimensional display is stopped when the own vehicle position is outside the road, but the three-dimensional display is stopped when the own vehicle position is inside the building, so that Even if the position deviates or returns slightly from the road due to an error or the like, the stereoscopic display is not stopped or restarted, and the screen is not difficult to see.

[4. Other embodiments]
In addition, this invention is not limited to the said embodiment, Other embodiments which are illustrated below are also included. For example, the above embodiment is an example in which the stop of the stereoscopic display is applied based on the determination that the display is outside the road or inside the building. In addition, as illustrated in the flowchart of FIG. By comparing with the road map data regardless of the inside, it is determined whether the vehicle position is a shielded structure section where a driver on the road such as a tunnel or an underpass cannot see an external landscape or a building on the ground (step 31). When the determination result is a shielding structure section (step 32), the three-dimensional display of the building may be stopped (step 33) and switched to another display such as two-dimensional (step 34). In this way, even in the case of a shielded structure section where outside buildings such as tunnels and underpasses cannot be seen even if the vehicle is on the road, it is appropriate to ensure that there is no contradiction by canceling the stereoscopic display of the building etc. It becomes easy to grasp the situation.

The functional block diagram which shows the structure of embodiment of this invention. The flowchart which shows an example of the process sequence in embodiment of this invention. The flowchart which shows another example of a process procedure in embodiment of this invention. The conceptual diagram showing the three-dimensional polygon showing the three-dimensional shape of a building in embodiment of this invention. The conceptual diagram which illustrates an intersection polygon in embodiment of this invention. The conceptual diagram which illustrates a normal polygon in the embodiment of the present invention. The conceptual diagram which shows the determination in case the coordinate is inside a polygon in embodiment of this invention. The conceptual diagram which shows the determination in case the coordinate is outside a polygon in embodiment of this invention. The flowchart which shows an example of the process sequence in other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Absolute position and direction detection part 2 ... Relative direction detection part 3 ... Vehicle speed detection part 4 ... Main CPU and its peripheral circuit M ... Memory 5 ... ROM
6. Dynamic RAM (DRAM)
7. Static RAM (SRAM)
8 ... Video RAM (VRAM)
DESCRIPTION OF SYMBOLS 9 ... User interface 10 ... Display part 11 ... Input part 12 ... CD-ROM control part 13 ... FM multiplex broadcast reception and processing part 14 ... Light / radio wave beacon reception and processing part 41 ... Destination designation reception part 42 ... Path search part 43 ... Guide unit 44 ... Drawing unit 45 ... Determination unit 46 ... Switch control unit

Claims (15)

In a navigation device using road map data representing at least a plane position of a road, a plane position and a three-dimensional shape of a building,
Means for detecting the vehicle position;
Means for stereoscopically displaying a building on the screen based on the road map data;
Determining means for determining whether the vehicle position is outside the road by collating with the road map data;
When the result of the determination is outside the road, control means for stopping the stereoscopic display of the building corresponding to at least the vehicle position;
A navigation apparatus characterized in that a computer is realized.   2. The navigation apparatus according to claim 1, wherein the determination unit determines whether the vehicle position is in a building by collating with the road map data, and determines that the vehicle is out of the road when the result is in the building.   3. The navigation device according to claim 1, wherein the control unit stops the stereoscopic display of only buildings in a predetermined range around the vehicle position when the determination result is outside the road. In a navigation device using road map data representing at least a plane position of a road, a plane position and a three-dimensional shape of a building, and a plane position of a shielding structure section where a ground building cannot be seen from the road,
Means for detecting the vehicle position;
Means for stereoscopically displaying a building on the screen based on the road map data;
A determination means for determining whether the vehicle position is the shielding structure section by checking with the road map data;
When the result of the determination is a shielding structure section, control means for stopping the stereoscopic display of the building;
A navigation apparatus characterized in that a computer is realized. Using information data prepared in advance for each building,
When the vehicle position is determined to be within the building, the computer implements means for outputting the information corresponding to the building and the fact that the vehicle is inside the building. The navigation device according to any one of the above. In a navigation method using road map data representing at least a plane position of a road, a plane position and a three-dimensional shape of a building,
A process for detecting the vehicle position;
A process of stereoscopically displaying a building on the screen based on the road map data;
A determination process for determining whether the vehicle position is outside the road by checking with the road map data;
When the result of the determination is outside the road, at least a control process for stopping the stereoscopic display of the building corresponding to the vehicle position;
A navigation method characterized in that the computer executes.   The navigation method according to claim 6, wherein the determination process determines whether the vehicle position is within a building by collating with the road map data, and determines that the vehicle is outside the road when the result is inside the building.   The navigation method according to claim 6 or 7, wherein the control processing stops the stereoscopic display of only buildings within a predetermined range around the vehicle position when the result of the determination is outside the road. In a navigation method using road map data representing at least a plane position of a road, a plane position and a three-dimensional shape of a building, and a plane position of a shielding structure section where a ground building cannot be seen from the road,
A process for detecting the vehicle position;
A process of stereoscopically displaying a building on the screen based on the road map data;
A determination process for determining whether the vehicle position is the shielding structure section by checking with the road map data;
When the result of the determination is a shielding structure section, a control process for stopping the stereoscopic display of the building;
A navigation method characterized in that the computer executes. Using information data prepared in advance for each building,
When the vehicle position is determined to be in the building, the computer executes the process of outputting the information corresponding to the building and the fact that the vehicle is inside the building. The navigation method according to any one of the above. By controlling a computer using road map data representing at least the plane position of the road and the plane position and three-dimensional shape of the building,
Detect your vehicle position,
Based on the road map data, the building is three-dimensionally displayed on the screen,
By checking with the road map data, it is determined whether the vehicle position is outside the road,
When the result of the determination is outside the road, at least the three-dimensional display of the building corresponding to the vehicle position is stopped.
A navigation program characterized by that.   The navigation program according to claim 11, wherein the computer is caused to determine whether the position of the vehicle is inside a building by collating with the road map data, and when the result is inside the building, the navigation program is determined to be outside the road.   The navigation program according to claim 11 or 12, wherein when the result of the determination is outside a road, the computer stops the stereoscopic display of only buildings within a predetermined range around the vehicle position. By controlling a computer using road map data representing at least the plane position of the road, the plane position and three-dimensional shape of the building, and the plane position of the shielding structure section where the building on the ground cannot be seen from the road,
Detect your vehicle position,
Based on the road map data, the building is three-dimensionally displayed on the screen,
By checking with the road map data, the vehicle position is determined to be the shielding structure section,
When the result of the determination is a shielding structure section, the stereoscopic display of the building is stopped.
A navigation program characterized by that. In the computer,
Using information data prepared in advance for each building,
When the vehicle position is determined to be in the building, the information corresponding to the building and the fact that the vehicle is inside the building are output. 15. Navigation program.

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