JP2004333155A - Information presenting device, information presenting method, and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pedestrian navigation system for providing 3-D display of buildings to make it easy to grasp marking points on target buildings and peripheral environments. <P>SOLUTION: In this pedestrian navigation system, a 3-D map is displayed for enabling a user to view the marking points in the direction of user's eyes. Display on the screen and real views can be easily compared to each other. The targets can be viewed in any direction from any point, not necessarily along roads. Buildings on the user's side of the marking point are displayed by special means such as wire frames or translucency, so that they can be seen through. Therefore, position relation of peripheral buildings can also be drawn to be outputted on the screen without shielding the views as well as the marking points. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an information presenting apparatus, an information presenting method, and a computer program for presenting information to a user, and more particularly, to an information presenting apparatus for presenting guidance information to a route, a destination, or the like to a user based on map information or the like. And an information presentation method, and a computer program.
[0002]
More specifically, the present invention relates to an information presenting apparatus and an information presenting method for presenting guidance information based on a three-dimensional map display using 3D computer graphics, and a computer program, and in particular, to a target building TECHNICAL FIELD The present invention relates to an information presenting apparatus, an information presenting method, and a computer program for presenting guidance information composed of a 3D display of a structure so as to make it easier to grasp a point of interest such as the surrounding environment and the like.
[0003]
[Prior art]
With the recent technological innovation, various types of information devices have been developed to support human activities in a wide range of fields such as industrial activities and daily life.
[0004]
For example, a navigation system stores map information in a relatively wide area in advance, reads corresponding map information based on current position information obtained from a GPS (Global Positioning System) or other position detecting device, and provides guidance information. To the user.
[0005]
Many navigation systems have been developed for vehicles and are available as on-board vehicles. In this case, the guidance information displayed on the screen is sequentially updated according to the current position that changes every moment. In addition, map information is displayed according to the route to the destination in accordance with the destination and other driving information input by the user (driver) (for example, see Patent Documents 1 and 2). ).
[0006]
More recently, by integrating 3D computer graphics technology with a navigation system, a 3D image of a structure such as a building or a road is rendered and placed at a corresponding location on a map, and guidance information is presented as a 3D map. Systems that do this are also widespread.
[0007]
Until now, navigation systems have mainly been car navigation systems that assist driving by in-vehicle use, but pedestrian navigation systems that show pedestrians the route to their destinations are also expected.
[0008]
Both the car navigation and the pedestrian navigation are common in that guidance information is presented by map display, but the present inventors think that there are the following differences.
[0009]
(1) From the viewpoint of destination search, in car navigation, the address, name, and the like of a place to go are known in advance. In contrast, pedestrian navigation is often a destination that responds to vague user requests, such as "I want to eat ramen."
(2) From the viewpoint of route search, in car navigation, it is important to reach a destination with an accurate road. On the other hand, pedestrian navigation does not always need to be fast. In some cases, you may avoid a dangerous spot or suggest a recommended spot.
(3) Speaking of maps in general, car navigation is generally not seen when driving, so it is only necessary to check at the beginning and end. On the other hand, in pedestrian navigation, the user frequently sees the vehicle at a traffic light or at a corner.
(4) Regarding the two-dimensional map display, in car navigation, a gyro sensor can be used, and the map information is mainly drawn with the place where the vehicle is traveling at the top. In contrast, in pedestrian navigation, it is basically impossible to determine the direction.
(5) Regarding the three-dimensional map display, in the car navigation, a particularly large effect cannot be obtained at present because of the feeling of expanding a 2D map. On the other hand, pedestrian navigation is extremely convenient for specifying a building that is an indicator of a turn at an intersection or the like.
(6) Speaking of voice guidance, car navigation is effective because the driver does not normally look at the screen. In contrast, pedestrian navigation is not always necessary.
[0010]
In the navigation system, the three-dimensional map display is becoming popular. However, in an area where tall buildings are lined up, there is a problem that a view point is obstructed by an attention point on the map. In the case of car navigation, a gyro sensor estimates the location where the vehicle is heading, and draws map information based on the estimated location. As long as the direction of travel is along the road, the view is not obstructed by buildings.
[0011]
On the other hand, in pedestrian navigation, depending on how to set the point of interest on the map, if there is a tall building between the viewpoint and the point of interest, the view will be blocked, making it difficult to grasp the point of interest. Would.
[0012]
[Patent Document 2]
JP-A-6-88831
[Patent Document 1]
JP-A-8-16988
[0013]
[Problems to be solved by the invention]
An object of the present invention is to provide an excellent information presenting device, an information presenting method, and a computer program capable of suitably presenting guidance information to a route or a destination based on map information or the like to a user. It is in.
[0014]
A further object of the present invention is to provide an excellent information presenting apparatus, an information presenting method, and a computer program which can suitably present guidance information based on a three-dimensional map display by utilizing 3D computer graphics. Is to do.
[0015]
A further object of the present invention is to provide an excellent information presenting apparatus capable of suitably presenting guidance information including a 3D display of a structure so as to facilitate understanding of a target point of interest such as a building and its surrounding environment. An object of the present invention is to provide an information presentation method and a computer program.
[0016]
A further object of the present invention is to provide an excellent pedestrian navigation system capable of suitably presenting guidance information including a 3D display so that the attention point can be easily grasped even if a tall building exists between the viewpoint and the attention point. To provide an information presenting apparatus, an information presenting method, and a computer program.
[0017]
Means and Action for Solving the Problems
The present invention has been made in view of the above problems, and a first aspect thereof is an information presentation device that presents guidance information to a user based on map information,
Map information storage means for storing map information;
Structure information storage means for storing three-dimensional geometric information of each structure arranged on the map;
Position information detecting means for acquiring the current position;
Display target area setting means for acquiring a point of interest based on the current position and setting a display target area including the point of interest;
Guidance for reading the map information about the display target area and the three-dimensional geometric information of each structure included in the display target area from the map information storage means and the structure information storage means, and generating guidance information composed of a three-dimensional map display. Information generation means;
Display means for outputting the generated guidance information to a screen;
It is an information presentation device characterized by comprising:
[0018]
In recent years, a technology for displaying a map in three dimensions has been developed in a navigation system, and it has become possible to display a three-dimensional map on a screen. Thereby, the user can three-dimensionally grasp the positional relationship between the current position and a three-dimensional structure such as a surrounding building or a three-dimensional intersection. In particular, in pedestrian navigation, a three-dimensional map display is extremely useful for specifying a building that is a guide for a turn at an intersection or the like.
[0019]
The navigation system sets a point of interest based on the current position acquired by position information detecting means such as GPS, sets a display target area based on the point of interest, and generates and presents guidance information.
[0020]
In the case of car navigation, it is a general practice to estimate a traveling position, that is, route phase information by a gyro sensor, and draw the leading direction with the course direction as a point of interest.
[0021]
On the other hand, in the case of pedestrian navigation, the destination and the route are not always clear. During walking, it is convenient if the current position can be identified on the map while comparing the screen display with the surrounding scenery. Therefore, in the present invention, the current position of the user is set as a point of interest, and a three-dimensional map display of a region including the point of interest (centered on the point of interest) is used as the guidance information. If the guidance information is a three-dimensional map display of the field of view that looks at the point of interest in the direction of the line of sight, it is easier to compare the screen display with the landscape. Good. In addition, it is possible to see the target from any point and from any direction without being along the road.
[0022]
However, when guidance information is presented by a three-dimensional map display, in a region where tall buildings are lined up, there is a problem that a view point is obstructed by a point of interest on the map.
[0023]
In the case of car navigation, the gyro sensor estimates the location where the vehicle is traveling, that is, the path phase information, and draws this at the beginning with the direction of the course as the point of interest. There is no obstruction.
[0024]
On the other hand, in the case of pedestrian navigation, the current position of the user is set as a point of interest, and terrain information of an area including the point of interest is displayed three-dimensionally. Therefore, if a tall building exists between the viewpoint and the point of interest, The view is obstructed, and the point of interest cannot be grasped. In this case, the user's current position is buried in the building on the screen and is lost, so that no guidance is possible.
[0025]
Therefore, in the present invention, by drawing a structure that is in front of the point of interest and obstructs the field of view and obstructs the view by changing the attribute of the object and using a special method (wire frame, translucent, etc.) that can be transmitted. In addition to the point of interest, the positional relationship of surrounding buildings can be drawn and output to the screen without obstructing the view. This makes it easier for the user to grasp the point of interest.
[0026]
There are several methods for determining whether the structure blocks the view. According to the present invention, a minimum cube for accommodating a structure is obtained, and it is simply determined whether or not the field of view is closed based on the positional relationship between the contact surface of the cube and the point of interest (that is, whether or not it is closer to the point of interest). Judgment was made. That is, if three or more vertices of the rectangle, which is the contact surface of the cube, are in front of the target point, the display is switched to the special display.
[0027]
As described above, whether to draw an object by a special method or a normal method can be determined only by the relationship between the grounding rectangle and the reference axis, so that the calculation cost of the CPU can be reduced. Furthermore, when a wire frame is employed as a special drawing method, drawing of a three-dimensional object generally requires less load on a 3D graphic drawing engine than drawing of an ordinary object, so that drawing time can be reduced.
[0028]
According to a second aspect of the present invention, a process for presenting guidance information using map information and three-dimensional geometric information of each structure arranged on the map is executed on a computer system. A computer program described in a computer-readable form,
A position information detecting step of obtaining a current position;
Acquiring a point of interest based on the current position and setting a display target area including the point of interest;
A guide information generating step of extracting map information about the display target area and three-dimensional geometric information of each structure included in the display target area to generate guide information composed of a three-dimensional map display;
A computer program characterized by comprising:
[0029]
The computer program according to the second aspect of the present invention defines a computer program described in a computer-readable format so as to realize a predetermined process on a computer system. In other words, by installing the computer program according to the second aspect of the present invention in a computer system, a cooperative action is exerted on the computer system, and the information presentation according to the first aspect of the present invention. The same operation and effect as the device can be obtained.
[0030]
Further objects, features, and advantages of the present invention will become apparent from more detailed descriptions based on embodiments of the present invention described below and the accompanying drawings.
[0031]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0032]
In recent years, a technology for displaying a map in three dimensions has been developed in a car navigation system, and a three-dimensional map can be displayed on a car navigation screen (see FIG. 1). As a result, the user can three-dimensionally grasp the positional relationship between the current position and a three-dimensional structure such as a surrounding building or a three-dimensional intersection by car navigation.
[0033]
At the same time, it is supposed that a GPS for ascertaining the current position is mounted on a personal digital assistant (PDA) or a mobile phone, and a walk that guides a user having the terminal to a destination route based on the current position. User navigation systems have come into practical use. Further, in recent years, a 3D graphic drawing engine using hardware that enables a mobile terminal device to draw a three-dimensional graphic on a screen at high speed in real time has been put to practical use, and high-speed graphic drawing can be performed on the mobile terminal device.
[0034]
Both the car navigation and the pedestrian navigation are common in that guidance information is presented by map display, but the present inventors think that there are the following differences.
[0035]
(1) From the viewpoint of destination search, in car navigation, the address, name, and the like of a place to go are known in advance. In contrast, pedestrian navigation is often a destination that responds to vague user requests, such as "I want to eat ramen."
(2) From the viewpoint of route search, in car navigation, it is important to reach a destination with an accurate road. On the other hand, pedestrian navigation does not always need to be fast. In some cases, you may avoid a dangerous spot or suggest a recommended spot.
(3) Speaking of maps in general, car navigation is generally not seen when driving, so it is only necessary to check at the beginning and end. On the other hand, in pedestrian navigation, the user frequently sees the vehicle at a traffic light or at a corner.
(4) In terms of two-dimensional map display, a gyro sensor can be used in car navigation, and the mainstream is to draw map information starting from the place where the vehicle is traveling. In contrast, in pedestrian navigation, it is basically impossible to determine the direction.
(5) With regard to three-dimensional map display, car navigation does not provide a particularly large effect at present, with the convenience of extending a 2D map. On the other hand, pedestrian navigation is extremely convenient for specifying a building that is an indicator of a turn at an intersection or the like.
(6) Speaking of voice guidance, car navigation is effective because the driver does not normally look at the screen. In contrast, pedestrian navigation is not always necessary.
[0036]
In the navigation system, the three-dimensional map display is becoming popular. However, in an area where tall buildings are lined up, there is a problem that a view point is obstructed by an attention point on the map. In the case of car navigation, the gyro sensor estimates the location where the vehicle is traveling, that is, the route phase information, and draws the map information with the direction of the course as the point of interest, starting with this, so long as the direction of travel is along the road, The view is not obstructed by the building.
[0037]
On the other hand, in pedestrian navigation, depending on how to set a point of interest, the point of interest is buried in a high building, the view is blocked by the building, and it becomes difficult to grasp the point of interest from the screen. .
[0038]
As the point of interest on the map referred to here, for example, it is conceivable to set the current position or the target point of the user. According to the present invention, the current position of the user is set as a point of interest, and the terrain information of an area including (or centered on) the point of interest is displayed three-dimensionally. In this case, the user having the terminal can identify the current position on the map while comparing the screen of the terminal with the surrounding scenery, which is considered to be convenient. However, if there is a tall building between the viewpoint and the point of interest, the field of view is blocked, and the point of interest cannot be grasped. In this case, the user's current position is buried in the building on the screen and is lost, so that no guidance is possible.
[0039]
Therefore, in the present invention, such a building that obstructs the view and obstructs the object by changing the attribute of the object and drawing it by a special method (wire frame, translucent, etc.) that can be transmitted to the point of interest. At the same time, it was possible to draw and output the positional relationship of surrounding buildings without interrupting the field of view. This makes it easier for the user to grasp the point of interest.
[0040]
FIG. 2 schematically shows a hardware configuration of the information processing terminal 1 according to one embodiment of the present invention. As shown in the figure, the information processing terminal 1 provides a position detecting device 5 such as GPS for acquiring the current position of the user, a processing device 6 of the terminal body, and guidance information such as a map or other information to the user. A display device 7 for presenting, an external recording device 8 for recording a large amount of data such as map information and three-dimensional geometric information of a structure, and an external input device 9 for receiving an operation or a command / data input from a user. It has.
[0041]
The processing device 6 of the terminal main body includes a CPU (Central Processing Unit) 6-d that comprehensively controls the operation of the entire device, a RAM (Random Access Memory) 6-b, a ROM (Read Only Memory) 6-c, It comprises a 3D graphic drawing engine 6-a and an interface 6-e with an external device.
[0042]
The CPU 6-d executes a pedestrian navigation program and other computer programs under an execution environment provided by the operating system. The CPU 6-d acquires position information from the GPS 5 via the interface 6-e, reads map information and three-dimensional geometric information of a structure from an external storage device, and acquires a user input via the external input device 9. be able to.
[0043]
The RAM 6-b is a writable semiconductor memory device, and is used for loading an execution program code of the CPU 6-d and temporarily storing work data of the execution program. The ROM 6-c is a read-only semiconductor memory device, and permanently stores a start-up program, hardware operation programs, manufacturing information, and the like.
[0044]
The 3D graphic drawing engine 6-a performs rendering and other three-dimensional graphic processing based on the map information and the three-dimensional geometric information of the structure according to an instruction from the CPU 6-d, and displays the generated drawing information on a display device. 7, the screen is output.
[0045]
Here, an operation of presenting guidance information (pedestrian navigation) in the illustrated information processing terminal 1 will be described.
[0046]
The processing device 6 grasps the latitude and longitude of the current position from the signal from the GPS 5, and acquires the three-dimensional map information including the position from the external storage device 8. At this time, it is assumed that the user has previously specified the map drawing mode to the three-dimensional map drawing mode from the bird's-eye viewpoint through the external input device 9. At this time, the map information obtained from outside is temporarily stored in the RAM 6-b via the interface 6-e, the CPU 6-d. When drawing a map, the CPU 6-d further sends this information to the 3D graphic drawing engine 6-a to draw the information, and the result is output to the display device 7.
[0047]
The information processing terminal 1 according to the present embodiment mainly presents three-dimensional map information for pedestrian navigation to a user.
[0048]
In the case of pedestrian navigation, destinations and routes are not always clear. During walking, it is convenient if the current position can be identified on the map while comparing the screen display with the surrounding scenery. Therefore, the information processing terminal 1 according to the present embodiment sets the current position of the user as a point of interest, and displays a region including the point of interest on a three-dimensional map. If a three-dimensional map display of the field of view that looks at the point of interest in the direction of the line of sight is used as guidance information for pedestrians, it is easier to compare the screen display with the landscape, for example, it is easier to identify a building that is a guide for a corner at an intersection or the like. , Easy to use. In addition, it is possible to see the target from any point and from any direction without being along the road.
[0049]
However, when guidance information is presented by a three-dimensional map display, in a region where tall buildings are lined up, there is a problem that a view point is obstructed by a point of interest on the map. In particular, when the current position of the user is set as a point of interest and terrain information of an area including the point of interest is displayed three-dimensionally, if a tall building exists between the viewpoint and the point of interest, the view is blocked by the building in front. , The attention point cannot be grasped. In this case, the user's current position is buried in the building on the screen and is lost, so that no guidance is possible.
[0050]
FIG. 3 shows a state in which the view in front of the building is obstructed and the point of interest cannot be grasped. Assuming that the center of the image, which is the point of interest, is O, when all the structures are drawn normally, the structure in front blocks the field of view, and the point of interest, that is, the current position, cannot be grasped.
[0051]
Therefore, in the information processing terminal 1 according to the present embodiment, a special method (wire frame, translucent, etc.) that allows a structure that is located before the point of interest and obstructs the view and obstructs the view by changing the attribute of the object is used. This makes it possible to draw and output the positional relationship of surrounding buildings as well as the point of interest without obstructing the view. As a result, the user can easily grasp the point of interest from within the three-dimensional value chart.
[0052]
FIG. 4 shows a state in which the building in front of the point of interest is switched to the wireframe display to visualize the point of interest buried in the building. As shown in the drawing, if the center of the image as the point of interest is set to O, the structure in front of this is drawn with a wire frame. The position can be grasped.
[0053]
Such a drawing process of the guidance information is realized by a cooperative operation among the CPU 6-d, the RAM 6-b, and the 3D graphic drawing engine 6-a. Specifically, it is as follows.
[0054]
First, a current position is acquired based on a position signal from the GPS 5 and the current position is set as a point of interest. Subsequently, the gaze direction or viewpoint when generating the guidance information is set. When the viewpoint is set, a straight line from the viewpoint to the point of interest is the line of sight. The gaze direction or viewpoint may be set using, for example, a user input via the external input device 9. Alternatively, a direction measurement device is further provided in the information processing terminal 1 and the direction in which the terminal 1 itself is turned is set as the line-of-sight direction, thereby improving operability. Alternatively, the position signal from the GPS 5 may be tracked every moment to estimate the traveling direction of the user, and this may be set as the line-of-sight direction.
[0055]
Next, an area having a predetermined area that includes the point of interest in the map information is set as a display target area of the three-dimensional map. Then, in the three-dimensional map space, as shown in FIG. 5, the user's attention position on the map is O, the user's viewpoint position is S, and a plane m passing through the attention point O and forming the ground plane is assumed. Next, a straight line l that satisfies OS⊥1 is determined on m, and this straight line is referred to as a straight line l ′ (hereinafter, the straight line l ′ is referred to as a “reference axis”) that is slightly translated in the viewpoint direction on the plane. Determine. With this straight line l ′, the plane m is divided into m ′ on the near side with respect to the viewpoint and m ″ on the back. This is not a straight line l such that OS⊥l on the ground plane m. The reason why the straight line l 'translated in front of this is set as the reference axis is to improve the appearance on the actual navigation screen.
[0056]
When rendering a structural object such as a building on the plane m, first, a minimum cube that accommodates the structural object is set as a bounding box. FIG. 6 shows a state in which a bounding box is set in the structure object.
[0057]
Among the four planes existing on the bounding box, the positions of the ground points P0 to P3 of the plane that is in contact with the plane m that forms the ground surface (hereinafter referred to as “ground quadrilateral”) are examined. At this time, if three or more of the four points belong to the front of the reference axis l ′ from the viewpoint of the user, that is, belong to the m ′ side, the structure object is displayed in a wire frame format. (See FIG. 7), otherwise draw normally (see FIG. 8).
[0058]
The above method is repeated for all structures on the ground. Then, all the structures slightly in front of the user's viewpoint are drawn by a specified special method such as a wire frame, and the other buildings are drawn normally.
[0059]
FIG. 9 shows, in the form of a flowchart, a processing procedure for generating guidance information for pedestrian navigation according to the present embodiment.
[0060]
First, it is determined whether a special structure is to be drawn or not, that is, whether the user is in a situation to check surrounding buildings or the like (step S1).
[0061]
Here, if it is determined that it is not a situation to draw a special structure, all the structures are drawn as normal 3D images (step S9), and the entire processing routine ends.
[0062]
On the other hand, if it is determined that the situation is such that a special structure should be drawn, the structure to be drawn is selected (step S2). More specifically, structures existing in a display target area cut out to accommodate a point of interest on a map are drawing targets, and are sequentially selected one by one.
[0063]
Then, a bounding box (see FIG. 6) is acquired for the selected structure (step S3).
[0064]
Next, the positional relationship between the positions of the grounding points P0 to P3 of the grounding rectangle of the bounding box and the reference axis l 'is checked (step S4).
[0065]
When three or more of the ground contact points P0 to P3 of the contact quadrangular belong to the front of the reference axis l ', that is, to the m' side from the viewpoint of the user (step S5), the structure Determines that it is in front of the point of interest and obstructs the field of view, and displays this structure object in a wire frame format (step S6) (see FIG. 7). If less than two of the ground points P0 to P3 are closer than the reference axis l ′ when viewed from the user's viewpoint, it is determined that the structure is deeper than the point of interest and does not obstruct the view, The image is drawn as a normal 3D image (step S7) (see FIG. 8).
[0066]
If an unprocessed structure remains in the display target area (step S8), the process returns to step S2, and the structure drawing processing is repeated according to the same procedure as described above. When the processing for all the structures is completed, the entire processing routine ends.
[0067]
FIG. 10 illustrates another method for determining whether a structure is obstructed by the field of view. In the illustrated example, the positional relationship between the structure and the point of interest is determined from the path phase obtained based on the change in the current position obtained from the position information from the GPS 5.
[0068]
In this case, first, a path phase obtained based on a change in the current position obtained from the position information from the GPS 5 is obtained. Next, it is determined which road the route follows, and phase information of the road is acquired. Then, a building that becomes an obstacle along the road is specified, and positional information of the building is acquired. After specifying the buildings, the display method of each building may be determined in the same manner as described above, and the drawing process may be performed.
[0069]
[Supplement]
The present invention has been described in detail with reference to the specific embodiments. However, it is obvious that those skilled in the art can modify or substitute the embodiment without departing from the scope of the present invention. That is, the present invention has been disclosed by way of example, and the contents described in this specification should not be interpreted in a limited manner. In order to determine the gist of the present invention, the claims described at the beginning should be considered.
[0070]
【The invention's effect】
As described above in detail, according to the present invention, an excellent information presenting apparatus and information presenting method capable of suitably presenting guidance information based on a three-dimensional map display using 3D computer graphics, And a computer program.
[0071]
Further, according to the present invention, an excellent information presenting apparatus capable of suitably presenting guidance information including a 3D display of a structure so that a target point of interest such as a building and its surrounding environment can be easily grasped. And an information presentation method, and a computer program.
[0072]
Further, according to the present invention, even if a tall building exists between a viewpoint and a point of interest, guidance information composed of 3D display can be suitably presented so that the point of interest can be easily grasped. An excellent information presentation device, an excellent information presentation method, and a computer program can be provided.
[0073]
By applying the three-dimensional map display method according to the present invention to all objects to be drawn, all the structures before the point of interest are drawn by a special method. Therefore, it is possible to draw not only the point of interest but also the positional relationship of the surrounding buildings without obstructing the line of sight from the screen.
[0074]
Further, according to the present invention, it is possible to determine whether to draw an object by a special method or an ordinary method based only on the relationship between the grounding rectangle and the reference axis. I'm done. Furthermore, when a wire frame is employed as a special drawing method for a structure, drawing a three-dimensional object generally requires less load on a 3D graphic drawing engine than drawing an ordinary object, so that drawing time should be reduced. Can be.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an outline of a navigation system.
FIG. 2 is a diagram schematically illustrating a hardware configuration of an information processing terminal according to an embodiment of the present invention.
FIG. 3 is a diagram showing a state in which a view in front of a building is obstructed and a point of interest cannot be grasped.
FIG. 4 is a diagram showing a state in which a building in front of a point of interest is visualized by switching to a wire frame display to display a point of interest buried in the building.
FIG. 5 is a diagram for explaining a guide information drawing process according to an embodiment of the present invention.
FIG. 6 is a diagram for explaining a guide information drawing process according to an embodiment of the present invention.
FIG. 7 is a diagram for explaining a guide information drawing process according to an embodiment of the present invention.
FIG. 8 is a diagram for explaining a guide information drawing process according to an embodiment of the present invention.
FIG. 9 is a flowchart illustrating a processing procedure for generating guidance information for pedestrian navigation.
FIG. 10 is a diagram for explaining another method for determining whether or not a structure is blocked by a field of view.
[Explanation of symbols]
1. Information processing terminal
5 ... GPS
6. Processing equipment
6-a 3D graphic drawing engine
6-b RAM
6-c ROM
6-d ... CPU
6-e: Interface with external device
7 Display device
8 External storage device
9 External input device

Claims (15)

An information presentation device that presents guidance information to a user based on map information,
Map information storage means for storing map information;
Structure information storage means for storing three-dimensional geometric information of each structure arranged on the map;
Position information detecting means for acquiring the current position;
Display target area setting means for acquiring a point of interest based on the current position and setting a display target area including the point of interest;
Guidance for reading the map information about the display target area and the three-dimensional geometric information of each structure included in the display target area from the map information storage means and the structure information storage means, and generating guidance information composed of a three-dimensional map display. Information generation means;
Display means for outputting the generated guidance information to a screen;
An information presentation device, comprising: The apparatus further includes a line-of-sight direction acquisition unit that acquires a line-of-sight direction,
The guidance information generating means generates, as guidance information, a three-dimensional map display of a field of view that looks at a point of interest in the line of sight;
The information presentation device according to claim 1, wherein: The line-of-sight direction obtaining means obtains a line-of-sight direction by any one of user input, direction measurement, and tracking of position information.
The information presentation device according to claim 2, wherein: The guidance information generating means,
A positional relationship determining unit configured to determine a positional relationship between each structure included in the display target area and the point of interest;
A drawing method determining unit that determines a drawing method of a structure according to the determination result of the positional relationship;
The information presentation device according to claim 2, comprising: The positional relationship determining means determines whether or not the structure is in front of the point of interest in the line of sight,
The drawing method determination unit sets a display method that does not block the attention point, such as a wire frame display, a semi-transparent display, or another structure for a structure determined to be located before the attention point,
The information presentation device according to claim 4, wherein: The positional relationship determining means obtains a minimum boundary cube accommodating the structure, and, based on the positional relationship between the grounding rectangle of the boundary cube and the point of interest, the structure is positioned in front of the point of interest in the line of sight. To determine if
The information presentation device according to claim 5, wherein: If the three or more vertices of the grounding rectangle of the boundary cube are closer to the point of interest than the point of interest, the positional relationship determination means determines that the structure is located before the point of interest.
The information presentation device according to claim 6, wherein: An information presentation method for presenting guidance information using map information and three-dimensional geometric information of each structure arranged on a map,
A position information detecting step of obtaining a current position;
Acquiring a point of interest based on the current position and setting a display target area including the point of interest;
A guide information generating step of extracting map information about the display target area and three-dimensional geometric information of each structure included in the display target area to generate guide information composed of a three-dimensional map display;
An information presentation method, comprising: Further comprising a line-of-sight direction obtaining step of obtaining a line-of-sight direction,
The guidance information generating step generates, as guidance information, a three-dimensional map display of a field of view that looks at a point of interest in the line of sight.
9. The information presentation method according to claim 8, wherein: In the gaze direction obtaining step, the gaze direction is obtained by one of user input, direction measurement, and tracking of position information.
The information presentation method according to claim 9, wherein: The guidance information generating step includes:
A positional relationship determining step of determining a positional relationship between each structure included in the display target region and the point of interest;
A drawing method determining step of determining a drawing method of the structure according to the determination result of the positional relationship;
The information presentation method according to claim 9, further comprising: In the positional relationship determination step, determine whether the structure is in front of the point of interest in the line of sight,
In the drawing method determining step, a wire frame display, a translucent display, or a display method that does not block other points of interest is set for a structure determined to be located in front of the point of interest,
The information presentation method according to claim 11, further comprising: In the positional relationship determination step, a minimum boundary cube accommodating the structure is obtained, and the structure is positioned in the line of sight with respect to the attention point based on the positional relationship between the grounding rectangle of the boundary cube and the attention point. Judge whether it is in the foreground,
The information presentation method according to claim 12, comprising: In the positional relationship determination step, if three or more vertices of the grounding quadrangle of the boundary cube are in front of the attention point, it is determined that the structure is in front of the attention point. The information presentation method according to claim 13, wherein Computer program written in a computer-readable format to execute a process for presenting guidance information using a map information and three-dimensional geometric information of each structure arranged on the map on a computer system And
A position information detecting step of obtaining a current position;
Acquiring a point of interest based on the current position and setting a display target area including the point of interest;
A guide information generating step of extracting map information about the display target area and three-dimensional geometric information of each structure included in the display target area to generate guide information composed of a three-dimensional map display;
A computer program comprising:

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