JP2012233904A - Information display device, information display method, information display program, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize reliable route guidance.SOLUTION: In a navigation device 100, a generation unit 104 generates an upper air route guidance display image in which a belt-like route display image continues along a route and is displayed at a predetermined height from a road surface, on the basis of current location information acquired by a current location information acquisition unit 101, route information acquired by a route information acquisition unit 102, and node information and link information stored in a storage unit 103, and a display unit 106 displays the generated upper air route guidance display image on a forward route picture of a moving body (a vehicle equipped with the navigation device 100) acquired by a picture acquisition unit 105 in a superimposed manner, or projects the generated upper air route guidance display image on a front window.

Description

  The present invention relates to an information display device that displays a route to a destination, an information display method, an information display program, and a recording medium. However, the use of the present invention is not limited to the recording medium described above.

  2. Description of the Related Art Conventionally, there is a technique for performing guidance display using a live-action image in a navigation device or the like (see, for example, Patent Document 1 below). In addition, there is a technique for displaying guidance information such as an arrow on an actual scene so as not to hinder driving (see, for example, Patent Document 2 below). As described above, the guidance information is displayed on the photographed image (actual scenery) so that the driver can reliably convey the guidance information.

JP 2008-20288 A JP 2006-162442 A

  However, in the above-described prior art (Patent Document 1), since the guidance display is continuously displayed on the road surface, when there is an obstacle such as a preceding vehicle or a building, the obstacle display overlaps with the guidance display. As a result, there was a problem that the route guidance was rather difficult to understand. In particular, when a guidance display is projected on the front window, information to be confirmed by the driver, such as the vehicle ahead, becomes invisible (or difficult to see), which may hinder safe driving. there were.

  In the above-described prior art (Patent Document 2), only the arrow is used for guidance display, and the arrow is superimposed on the actual scene at a position away from the road surface. There was a problem that it was difficult for the driver to know at which intersection to make a straight, right or left turn.

  In order to solve the above-described problems and achieve the object, an information display device according to the invention of claim 1 includes an image acquisition means for acquiring an image including a road ahead of the moving object, and an object from the current position of the moving object. Display means for displaying a band-shaped route guidance image for guiding a direction to travel along the route to the ground above the road surface of the road corresponding to the route in the video, the display means, The route guidance image is displayed with its position changed in accordance with the height of the confirmation object in the area to which the current position of the mobile object belongs.

  According to a third aspect of the present invention, there is provided an information display device comprising: a belt-like route guidance image for guiding a direction to travel along a route from a current position of a moving body to a destination; Projecting means for projecting to a position that can be seen above the road surface of the road, and the projecting means determines the position of the route guidance image according to the height of the confirmation object in the area to which the current position of the moving object belongs. It changes and projects on the window of the said mobile body.

  The information display method according to the invention of claim 5 is an information display method executed in the information display device, wherein an image acquisition step of acquiring an image including a road ahead of the moving body, and a current position of the moving body A display step of displaying a band-shaped route guidance image that guides a direction to travel along a route to a destination on a road surface of a road corresponding to the route in the video, and the display step includes The position of the route guidance image is changed and displayed in accordance with the height of the confirmation object in the area to which the current position of the moving body belongs.

  According to a sixth aspect of the present invention, an information display program causes a computer to execute the information display method according to the fifth aspect.

  A recording medium according to a seventh aspect of the present invention is readable by a computer that records the information display program according to the sixth aspect.

FIG. 1 is a block diagram of a functional configuration of the navigation device according to the first embodiment. FIG. 2 is a flowchart of a navigation process performed by the navigation device according to the first embodiment. FIG. 3 is a block diagram of a functional configuration of the navigation device according to the second embodiment. FIG. 4 is a flowchart of a navigation process performed by the navigation device according to the second embodiment. FIG. 5 is a block diagram of a functional configuration of the information display apparatus according to the third embodiment. FIG. 6 is a block diagram illustrating a hardware configuration of the navigation device. FIG. 7 is a block diagram illustrating a functional configuration of the generation unit of the navigation device. FIG. 8 is a flowchart illustrating a processing procedure of the generation unit of the navigation device. FIG. 9 is an explanatory diagram showing map data (node information, link information) at intersections of crossroads. FIG. 10A is an explanatory diagram of the contents of the placement process in the placement processing unit of the generation unit. FIG. 10B is an explanatory diagram of the content of the placement process in the placement processing unit of the generation unit. FIG. 11A is an explanatory diagram of the contents of the placement process in the placement processing unit of the generation unit. FIG. 11B is an explanatory diagram of the content of the placement process in the placement processing unit of the generation unit. FIG. 12A is an explanatory diagram of the contents of the movement process in the movement processing unit of the generation unit. FIG. 12B is an explanatory diagram of the contents of the movement process in the movement processing unit of the generation unit. FIG. 13A is an explanatory diagram of the contents of the setting process in the setting processing unit of the generating unit. FIG. 13B is an explanatory diagram of the contents of the setting process in the setting processing unit of the generating unit. FIG. 14 is an explanatory diagram showing a state rendered by the rendering processing unit of the generation unit. FIG. 15 is an explanatory diagram showing a state in which an aerial route guidance display image is superimposed on the front video. FIG. 16 is an explanatory diagram illustrating a state in which a guidance display image that is not an over-the-air route guidance display image is displayed over the front video. FIG. 17 is an explanatory diagram showing another state in which a guidance display image that is not an over-the-air route guidance display image is displayed over the front video. FIG. 18 is an explanatory diagram showing another state in which a guidance display image that is not an over-the-air route guidance display image is displayed over the front video. FIG. 19 is an explanatory diagram showing another state in which the sky route guidance display image is displayed superimposed on the front video. FIG. 20 is an explanatory diagram showing another state in which the sky route guidance display image is displayed superimposed on the front video. FIG. 21 is an explanatory diagram showing another state in which the sky route guidance display image is displayed superimposed on the front video. FIG. 22 is an explanatory diagram showing another state in which the sky route guidance display image is superimposed on the front video. FIG. 23 is an explanatory diagram showing another state in which the sky route guidance display image is displayed superimposed on the front video. FIG. 24 is an explanatory diagram showing a state in which the sky route guidance display image is projected on the front window.

  Exemplary embodiments of an information display device, an information display method, an information display program, and a recording medium according to the present invention will be explained below in detail with reference to the accompanying drawings.

(Embodiment 1)
A functional configuration of the navigation device 100 according to the first embodiment will be described. FIG. 1 is a block diagram of a functional configuration of the navigation device according to the first embodiment. In FIG. 1, the navigation device 100 according to the first embodiment includes a current position information acquisition unit 101, a route information acquisition unit 102, a storage unit 103, a generation unit 104, a video acquisition unit 105, and a display unit 106.

  The current position information acquisition unit 101 acquires information regarding the current position of the vehicle. The information related to the current position of the host vehicle may include information such as the speed of the host vehicle and the traveling direction in addition to the latitude and longitude information. Information about the current position of the host vehicle can be acquired by, for example, a GPS unit 617 and various sensors 618 described later.

  The route information acquisition unit 102 acquires route information to the set destination. The route information may be registered in advance, may be acquired by being received by communication means, or may be acquired by input of an operator (driver or passenger). At that time, only information on the destination is input from the operator, a route is searched based on the current position of the vehicle and the input destination, and the determined route is acquired as route information. Good.

  The storage unit 103 stores so-called road information (map information), specifically, link information including, for example, a road shape and node information indicating an intersection. The map information may further include traffic lights, sign information, building information (for example, building shape and height), and the like. The link information may include information on road width information and inclination. The storage unit 103 may be provided in the navigation device 100, or an external server accessible by communication may realize the function of the storage unit 103.

  The generation unit 104 includes information on the current position acquired by the current position information acquisition unit 101, route information acquired by the route information acquisition unit 102, only link information stored in the storage unit 103, or node information and Based on the link information, an aerial route guidance display image that is a band-like route display image continuous along the route and displayed at a predetermined height from the road surface is generated. A specific method for generating the sky route guidance display image will be described later.

  The video acquisition unit 105 acquires the video from the imaging unit 110 that captures a video (particularly a front video, but not limited to a front video) on the route of the moving body (own vehicle). The imaging unit 110 may be included in the navigation device 100. The display unit 106 controls the display screen to display the sky route guidance display image generated by the generation unit 104 on the video acquired by the video acquisition unit 105.

  Next, a procedure of navigation processing by the navigation device 100 will be described. FIG. 2 is a flowchart showing a procedure of navigation processing by the navigation device. In the flowchart of FIG. 2, the navigation device 100 first acquires information on the current position of the vehicle by the current position information acquisition unit 101 (step S201), and the route information to the destination by the route information acquisition unit 102. Is acquired (step S202).

  And the navigation apparatus 100 acquires the road information (node information / link information) memorize | stored in the memory | storage part 103 (step S203). Next, the navigation apparatus 100 is based on the current position information, route information, and link information (when there is no node (intersection) near the front of the current location), or the current position information, route information, and node information / link. Based on the information (when there is a node (intersection) near the front of the current location), an sky route guidance display image is generated (step S204).

  Furthermore, the navigation apparatus 100 acquires a front image in the traveling direction of the host vehicle (step S205). Then, the navigation device 100 displays the generated sky route guidance display image so as to overlap the front video (step S206).

  Next, the navigation device 100 waits for the current position to be changed by traveling of the host vehicle (step S207: No), and when the current position is changed (step S207: Yes), it arrives at the destination. It is determined whether or not it has been done (step S208). If the destination has not yet been reached (step S208: No), the process returns to step S201, and the processes of steps S201 to S207 are repeated. In step S208, when it arrives at the destination (step S208: Yes), a series of processing is ended.

  As a result, the sky route guidance display image continues to be displayed superimposed on the front video until the host vehicle reaches the destination. The operator can recognize the route to the destination by looking at the sky route guidance display image displayed together with the front image on the display screen while traveling.

  Note that the navigation device 100 may be configured as a single device with each component unit integrated, or each component unit may be a single device and the function of the navigation device 100 may be realized by a plurality of devices. Good.

(Embodiment 2)
Next, a functional configuration of the navigation device 300 according to the second embodiment will be described. FIG. 3 is a block diagram of a functional configuration of the navigation device according to the second embodiment. In FIG. 3, the navigation device 300 according to the second embodiment includes a current position information acquisition unit 301, a route information acquisition unit 302, a storage unit 303, a generation unit 304, and a projection unit 305.

  Here, the current position information acquisition unit 301, the route information acquisition unit 302, and the storage unit 303 have the same configuration as the current position information acquisition unit 101, the route information acquisition unit 102, and the storage unit 103 in the first embodiment. The description is omitted.

  The generation unit 304 includes information on the current position acquired by the current position information acquisition unit 301, route information acquired by the route information acquisition unit 302, and road information (that is, only link information) stored in the storage unit 303. Or a route information display image that is a band-shaped route display image continuous along the route and displayed at a predetermined height from the road surface. The generation unit 304 is different from the generation unit 104 of the first embodiment in a specific method for generating the sky route guidance display image. A specific method for generating the sky route guidance display image will be described later.

  The difference between the navigation device 300 according to the second embodiment and the navigation device 100 according to the first embodiment is that the navigation device 100 according to the first embodiment includes a video acquisition unit 105 and a display unit 106. On the other hand, the navigation device 300 according to the second embodiment is not provided with the video acquisition unit 105 and the display unit 106 but is provided with a projection unit 305 instead.

  The projection unit 305 projects the sky route guidance display image generated by the generation unit 304 onto the corresponding vehicle window. In other words, the image is projected onto a window (usually a front window) where the road corresponding to the route can be seen from the inside of the vehicle. As a result, the sky route guidance display image appears to overlap the actual scenery seen from the window.

  Next, a procedure of navigation processing by the navigation device 300 will be described. FIG. 4 is a flowchart showing a procedure of navigation processing by the navigation device. In the flowchart of FIG. 4, the navigation device 300 first acquires information on the current position of the vehicle by the current position information acquisition unit 301 (step S <b> 401), and the route information to the destination by the route information acquisition unit 302. Is acquired (step S402). Furthermore, the navigation apparatus 300 acquires road information (node information / link information) stored in the storage unit 303 (step S403).

  And the navigation apparatus 300 is based on present position information and road information (route information and link information) (when there is no node (intersection) in the front vicinity of the present location), or present position information, route information, and node Based on the information and link information (when there is a node (intersection) in the vicinity of the front of the current location), a sky route guidance display image is generated (step S404). And the produced | generated sky route guidance display image is projected on the window of the own vehicle (step S405).

  Next, the navigation apparatus 300 waits for the current position to be changed by traveling of the host vehicle (step S406: No), and when the current position is changed (step S406: Yes), it arrives at the destination. It is determined whether or not (step S407). If the destination has not been reached yet (step S407: No), the process returns to step S401, and the processes of steps S401 to S406 are repeated. In step S407, when it arrives at the destination (step S407: Yes), a series of processes are complete | finished.

  Thus, the sky route guidance display image continues to be projected on the front window of the own vehicle until the own vehicle arrives at the destination. While traveling, the operator can recognize the route to the destination by viewing the actual scenery ahead through the front window and viewing the projected route guidance display image.

  Note that the navigation device 300 may be configured as a single device with each component unit integrated, or each component unit may be a single device, and the function of the navigation device 300 may be realized by a plurality of devices. Good.

(Embodiment 3)
A functional configuration of the information display apparatus 500 according to the third embodiment will be described. In the first and second embodiments, for example, the navigation device is mounted on a moving body such as an automobile. In the third embodiment, the navigation apparatus is not limited to the one mounted on the moving body.

  FIG. 5 is a block diagram of a functional configuration of the information display apparatus according to the third embodiment. In FIG. 5, the information display apparatus 500 according to the third embodiment includes a current position information acquisition unit 501, a route information acquisition unit 502, a storage unit 503, a generation unit 504, a front video acquisition unit 505, a display unit 506, and an imaging unit 510. Consists of.

  The current position information acquisition unit 501 acquires information related to the current position of the own device. In addition to the latitude and longitude information, the information about the current position of the device itself includes the direction in which the device (particularly the display screen) is facing, the height of the device from the ground, and the device (the operator carrying the device). Information such as moving speed may be included. Information about the current position of the device itself can be acquired by, for example, a GPS unit 617 and various sensors 618 described later.

  The route information acquisition unit 502 acquires route information to the set destination. The route information may be registered in advance, may be acquired by being received by a communication unit, or may be acquired by input of an operator of the own device. At that time, only information related to the destination is input from the operator, a route is searched based on the current position of the own device and the input destination, and the determined route is acquired as route information. Good.

  The storage unit 503 stores so-called road information (map information), specifically, link information including, for example, road shape and width information, and node information indicating an intersection. The map information may further include traffic lights, sign information, building information (for example, building shape and height), and the like. The link information may include information related to road inclination. The storage unit 503 may be provided in the information display device 500, or an external server accessible by communication may realize the function of the storage unit 503.

  The generation unit 504 includes information on the current position acquired by the current position information acquisition unit 501, route information acquired by the route information acquisition unit 502, and road information stored in the storage unit 503 (only link information or Based on the node information and the link information), an empty route guidance display image that is a band-like route display image continuous along the route and displayed at a predetermined height from the road surface is generated. A specific method for generating the sky route guidance display image will be described later.

  The video acquisition unit 505 acquires the video from the imaging unit 510 that captures a video (particularly a front image, but not limited to a front image) on the route of the device itself. The imaging unit 510 is configured to be included in the information display device 500. However, it is only necessary that the imaging unit 510 is connected to the information display device 500 by wire or wireless and the information display device 500 can acquire the captured video. The display unit 506 controls the display screen to display the sky route guidance display image generated by the generation unit 504 so as to overlap the video acquired by the video acquisition unit 505.

  Note that the information display device 500 may be configured as a single device with each component unit integrated, or each component unit is a single device, and the function of the information display device 500 is realized by a plurality of devices. May be.

  The procedure of the information display process by the information display device 500 is the same as the procedure of the navigation process by the navigation device according to the first embodiment shown in FIG. Information display device 500 may be, for example, a portable information terminal device (more specifically, for example, a mobile phone, a PDA, a mobile personal computer, etc.). Further, the information display device 500 can be mounted on a moving body to provide the navigation device 100 according to the first embodiment.

  Next, examples of the navigation device 100 according to the first embodiment, the navigation device 300 according to the second embodiment, and the information display device 500 according to the third embodiment will be described. In the following examples, the example of the navigation device 100 according to the first embodiment, the example of the navigation device 300 according to the second embodiment, and the information display device 500 according to the third embodiment are applied to a navigation device mounted on a vehicle. An example will be described.

(Hardware configuration of navigation device)
FIG. 6 is a block diagram illustrating a hardware configuration of the navigation device 100, the navigation device 300, and the information display device 500 (hereinafter simply referred to as “navigation device”).

  In FIG. 6, the navigation device includes a CPU 601, ROM 602, RAM (memory) 603, magnetic disk drive 604, magnetic disk 605, optical disk drive 606, optical disk 607, audio I / F (interface) 608, microphone 609, speaker 610, input. A device 611, a video I / F 612, a camera 613, a display 614, a projector 615, a communication I / F 616, a GPS unit 617, and various sensors 618 are provided. The constituent units 601 to 618 are connected by a bus 620, respectively.

  The CPU 601 governs overall control of the navigation device. The ROM 602 records various programs such as a boot program, a communication program, a data display program, and a data analysis program. The RAM 603 is used as a work area for the CPU 601.

  The magnetic disk drive 604 controls the reading / writing of the data with respect to the magnetic disk 605 according to control of CPU601. The magnetic disk 605 records data written under the control of the magnetic disk drive 604. As the magnetic disk 605, for example, an HD (hard disk) or an FD (flexible disk) can be used.

  The optical disk drive 606 controls the reading / writing of the data with respect to the optical disk 607 according to control of CPU601. The optical disc 607 is a detachable recording medium from which data is read according to the control of the optical disc drive 606, and includes, for example, a Blu-ray disc, DVD, CD, and the like. As the optical disk 607, a writable recording medium can be used. In addition to the optical disk 607, the removable recording medium may be an MO, a memory card, or the like.

  An example of information recorded on the magnetic disk 605 or the optical disk 607 is map data used for route search / route guidance. The map data includes background data representing features (features) such as buildings, rivers, and the ground surface, and road shape data representing the shape of the road. The map data is displayed on the display screen of the display 614 in two dimensions or three dimensions. Drawn. When the navigation device is guiding the route, the map data and the current location of the vehicle acquired by the GPS unit 617 described later are displayed in an overlapping manner.

  The audio I / F 608 is connected to a microphone 609 for audio input and a speaker 610 for audio output. The sound received by the microphone 609 is A / D converted in the sound I / F 608. In addition, sound is output from the speaker 610. Note that the sound input from the microphone 609 can be recorded on the magnetic disk 605 or the optical disk 607 as sound data.

  Examples of the input device 611 include a remote controller having a plurality of keys for inputting characters, numerical values, and various instructions, a keyboard, a mouse, a touch panel, and the like. Further, the input device 611 can connect other information processing terminals such as a digital camera and a mobile phone terminal to input / output data.

  The video I / F 612 is connected to a camera 613 for video input, a display 614 for video output, and a projector 615 for video output. Specifically, the video I / F 612 includes, for example, a graphic controller that controls the entire display 614 and the projector 615, a buffer memory such as a VRAM (Video RAM) that temporarily stores image information that can be displayed immediately, and the like. Based on image data output from the graphic controller, the display 614 and a control IC for controlling display of the projector 615 are configured.

  The camera 613 captures images inside and outside the vehicle and outputs them as image data. An image captured by the camera 613 can be recorded on the magnetic disk 605 or the optical disk 607 as image data.

  The display 614 displays icons, cursors, menus, windows, or various data such as characters and images. As the display 614, for example, a CRT, a TFT liquid crystal display, a plasma display, or the like can be adopted. The display 614 can realize the functions of the display screen controlled by the display unit 106 in Embodiment 1 and the display unit 506 in Embodiment 3.

  Similar to the display 614, the projector 615 displays icons, cursors, menus, windows, or various data such as characters and images. The projector 614 projects various data on the front window using, for example, a CRT or a liquid crystal. For example, the projector 614 is installed on the ceiling or the upper part of the seat in the vehicle. The projector 615 can realize the function of the projection unit 305 of the second embodiment.

  The communication I / F 616 is connected to a network via wireless and functions as an interface between the navigation device and the CPU 601. The communication I / F 616 is further connected to a communication network such as the Internet via wireless, and also functions as an interface between the communication network and the CPU 601. Communication networks include LANs, WANs, public line networks and mobile phone networks.

  The GPS unit 617 receives radio waves from GPS satellites and calculates information indicating the current location of the vehicle (current location of the navigation device). The output information of the GPS unit 617 is used when the current position of the vehicle is calculated by the CPU 601 together with output values of various sensors described later. The information indicating the current location is information for specifying one point on the map data, such as latitude / longitude and altitude.

  The various sensors 618 are, for example, a gyro sensor, an acceleration sensor, a vehicle speed sensor, and the like, and detect the moving state of the vehicle. Output signals from the various sensors 618 are used for the calculation of the current location by the CPU 601 and the measurement of changes in speed and direction.

  In the configuration of the navigation apparatus 100 according to the first embodiment, the current position information acquisition unit 101 includes a GPS unit 617, various sensors 618, a CPU 601 (ROM602, RAM603, magnetic disk 605, optical disk 607, etc. The route information acquisition unit 102 and the storage unit 103 are acquired by the CPU 601, the magnetic disk drive 604 and the magnetic disk 605, or the optical disk drive 606 and the optical disk 607, and the generation unit 104 is acquired by the CPU 601. The unit 105 is imaged by the CPU 601, the video I / F 612, the camera 613 or the communication I / F 616, and the display unit 106 is imaged by the CPU 601, the video I / F 612, and the display 614. 110, the camera 613 and the communication I / F616, realizing the respective functions.

  In the configuration of the navigation apparatus 300 according to the second embodiment, the current position information acquisition unit 301 includes a GPS unit 617, various sensors 618, a CPU 601 (a program stored in a ROM 602, a RAM 603, a magnetic disk 605, an optical disk 607, and the like. CPU601 executes the route information acquisition unit 302 and the storage unit 303 by the CPU 601, the magnetic disk drive 604 and the magnetic disk 605, or the optical disk drive 606 and the optical disk 607, and the generation unit 304 by the CPU 601. A function 305 is realized by the CPU 601, the video I / F 612, and the projector 615.

  In the configuration of the information display apparatus 500 according to the third embodiment, the current position information acquisition unit 501 is stored in the GPS unit 617, various sensors 618, CPU 601 (ROM 602, RAM 603, magnetic disk 605, optical disk 607, etc. When the CPU 601 executes the program), the route information acquisition unit 502 and the storage unit 503 are processed by the CPU 601, the magnetic disk drive 604 and the magnetic disk 605, or the optical disk drive 606 and the optical disk 607, and the generation unit 504 is processed by the CPU 601. The acquisition unit 505 is performed by the CPU 601, the video I / F 612, the camera 613, or the communication I / F 616, and the display unit 506 is configured by the CPU 601, the video I / F 612, and the display 614. It is the camera 613 and the communication I / F616, realizing the respective functions.

  Next, a procedure for generating the sky route guidance display image by the generation unit (generation units 104, 304, and 504) of the navigation device will be described in detail. FIG. 7 is a block diagram illustrating a functional configuration of the generation unit of the navigation device. FIG. 8 is a flowchart showing a processing procedure of the generation unit of the navigation device.

  7, the generation unit includes an arrangement processing unit (arrangement unit) 701, a movement processing unit (movement unit) 702, a setting processing unit (setting unit) 703, a rendering processing unit (rendering unit) 704, and an adjustment unit. 705. In the flowchart of FIG. 8, the arrangement processing unit 701 arranges a band-like object corresponding to a planar road in the space for three-dimensional calculation based only on link information or based on node information and link information (step S801). At that time, based on the route information, only the link information corresponding to the route is extracted, and a portion other than the route is deleted (step S802).

  The movement processing unit 702 moves the band-shaped object arranged by the arrangement processing unit 701 by a predetermined amount (predetermined height) in the height direction orthogonal to the plane in the space for three-dimensional calculation (step S803). The setting processing unit 703 determines the viewpoint position, viewpoint direction, and viewpoint height for three-dimensional calculation for the band-like object moved by the movement processing unit 702, the position, direction, and height of the imaging unit, or the operator (driving The viewpoint position, the viewpoint direction, and the viewpoint height of the person or passenger) are set (step S804). The rendering processing unit 704 renders the band-like object viewed from the viewpoint position, viewpoint direction, and viewpoint height set by the setting processing unit 703 as an aerial route guidance display image (step S805).

  The adjustment unit 705 can adjust a predetermined amount (predetermined height) from the road surface (the ground), and the movement processing unit 702 can adjust the height adjusted by the adjustment unit 705 in the three-dimensional calculation space in step S803. It moves in the height direction perpendicular to the plane. The adjustment unit 705 may perform adjustment according to route information (for example, road inclination, presence / absence of an intersection (node), presence / absence of a traffic light, etc.). Moreover, you may make it adjust to an operator's desired height by the input from an operator.

  FIG. 9 is an explanatory diagram showing map data (node information, link information) at intersections of crossroads, and FIGS. 10-1 to 11-2 are explanatory diagrams showing the contents of arrangement processing in the arrangement processing unit 701 of the generation unit. FIG. In FIG. 9, the map data includes a node 900 indicating an intersection and links 901 to 904 indicating four roads with respect to the node 900. The link has information such as the shape of the road and the width of the road. Based on the information, a link in which a planar road is arranged in the space for three-dimensional calculation is represented from the top, as shown in FIG. It is.

  In FIG. 10A, the arrangement processing unit 701 arranges the link 901 shown in FIG. 9 as a planar road in a three-dimensional calculation space in consideration of the shape and width of the road, and forms a link 1001. . Similarly, the arrangement processing unit 701 arranges the links 902 to 904 shown in FIG. 9 as planar roads in the space for three-dimensional calculation to form links (band images) 1002 to 1004.

  From FIG. 10A, it can be seen that the link 1001 is a street having a wide road width, and the link 1002 is a road having a narrow road width compared to the link 1001. Note that the arrangement processing unit 701 may arrange all the links as a constant road width without considering information on the road width of the links. FIG. 10-2 is a view from the side (viewed from the lower side to the upper side of FIG. 10-1) of what is arranged as a planar road in the space for three-dimensional calculation in FIG. 10-1. . At this time, the height of each link 1001 to 1004 (Z-axis direction) is zero. The reference height (that is, height 0) can be arbitrarily set, and for example, the ground surface can be used as a reference.

  In FIG. 10A, only the link corresponding to the route is extracted from the four links 1001 to 1004 in FIG. Similarly to FIG. 10A, FIG. 11A also illustrates a plane road arranged in a three-dimensional calculation space from the viewpoint from above. Since the route reaches from the link 901 in FIG. 9 to the node 900, turns right on the node 900 and reaches the link 902, in FIG. 11A, the arrangement processing unit 701 only includes the links 1001 and 1002 in FIG. Is extracted, and links other than the root (links 1003 and 1004) are deleted.

  The placement processing unit 701 may not place links other than the root (links 1003 and 1004) from the beginning (that is, omitting FIG. 10-1 in the space for three-dimensional calculation and starting from the beginning. 11-1).

  FIG. 11-2 is similar to FIG. 10-2, in which the one arranged as a planar road in the space for three-dimensional calculation in FIG. 11-1 is viewed from the side (from the lower side to the upper side in FIG. 11-1). (Point of view). Even at this time, the height of the links 1001 and 1002 (Z-axis direction) is zero.

  12A and 12B are explanatory diagrams illustrating the contents of the movement process in the movement processing unit 702 of the generation unit. The movement processing unit 702 moves the links 1001 and 1002 arranged by the arrangement processing unit 701 upward (Z-axis direction) by a predetermined height (here, about 20 m above the ground). Thereby, the arrangement of the objects (band-like objects) in the space for three-dimensional calculation is completed.

  Since FIG. 12-1 is expressed from the viewpoint from the top like FIGS. 10-1 and 11-1, it looks the same as FIG. 11-1 (that is, the movement in the Z-axis direction is not known). FIG. 12-2 is a view from the side (view point from the lower side to the upper side of FIG. 12-1) as in FIGS. 10-2 and 11-2. Compared to FIG. It can be seen that the links 1001 and 1002 are higher than the original height (height 0) by 20 m in the Z-axis direction.

  FIGS. 13A and 13B are explanatory diagrams illustrating the contents of the setting process in the setting processing unit 703 of the generation unit. The setting processing unit 703 performs the position and height of the imaging unit in which the camera 1301 indicating the viewpoint position and height for three-dimensional calculation is mounted on the own vehicle with respect to the belt-shaped image moved by the movement processing unit 702, or Set the viewpoint position and height of the driver or passenger.

  FIG. 13-2 shows the viewpoint from the side (the viewpoint from the lower side to the upper side of FIG. 13-1) as in FIGS. 10-2, 11-2, and 12-2. It can be seen that the position is lower than the links 1001 and 1002 in the Z-axis direction (for example, about 1.5 m above the ground) and is almost directly below the link 1001. This indicates that the vehicle is traveling on the road of the link 1001. In addition, it indicates that the camera 1301 is mounted at a predetermined position (for example, the back side of the rearview mirror) of the own vehicle, or that the viewpoint position of the driver or the passenger riding the own vehicle is taken into consideration. .

  FIG. 14 is an explanatory diagram showing a state rendered by the rendering processing unit 704 of the generation unit. FIG. 14 illustrates a state in which the links 1001 and 1002 viewed from the camera 1301 illustrated in FIGS. 13A and 13B are rendered. Since the camera 1301 and the link 1001 have different heights, the link 1001 looks up from below from the camera 1301. When this state is shown in the space for three-dimensional calculation, it is close to an inverted trapezoid as shown in FIG. It becomes a shape. The link 1002 also becomes a band-like image having a width that the camera 1301 looks up from below. Thereby, the generation (drawing) of the band-like image (link) by the generation unit is completed.

  15-24 is explanatory drawing which shows the state which displayed the sky route guidance display image superimposed on the front image | video. The band images 1001 and 1002 generated in FIG. 14 indicate route guidance on the front video. Since the route guidance constituted by the belt-like images 1001 and 1002 continuous along the route is displayed above the road surface, even if it is superimposed on the front image, the operator (driver or passenger) However, even if there is an obstacle on the front side in the front image, for example, a car traveling in front, the obstacle is not blocked by the belt-like image, and the user does not mistake the front image.

  FIG. 16 shows a state in which the belt-like image is superimposed on the front image when the movement processing in the movement processing unit 702 of the generation unit is not performed. As shown in FIG. 16, a band-like image is displayed so as to overlap the road surface of the front image. In this case, as shown in FIG. 16, when there is no obstacle ahead, it is considered effective as route guidance. However, as shown in FIG. 17 and FIG. In this case, the forward vehicle and the left utility pole, and in the case of FIG. 18, the forward vehicle) are present, so that the belt-like image and the obstacle are overlapped, making it difficult to understand the route guidance.

  In particular, when a belt-like image is projected on the front window shown in FIG. 24, which will be described later, the belt-like image projected on the windshield, such as the front vehicle to be confirmed by the driver, may be obstructed, which may hinder safe driving. There is also sex. Therefore, it is better to display in the sky than to display it superimposed on the road surface.

  19 and 20 show a state where the height of movement of the movement processing unit 702 is changed by the adjustment unit 705 of the generation unit. FIG. 19 shows a case where the movement in the Z-axis direction is about 4 m, and FIG. 20 shows a case where the movement in the Z-axis direction is about 20 m. In FIG. 19, although it is easy to see as route guidance, the signal and the sign which a driver must confirm are blocked. Therefore, it is necessary to adjust the height in the Z direction so as not to block those traffic lights and signs. Signals, signs, etc. that must be confirmed for traffic are referred to as “confirmation objects for traffic”.

  As an adjustment method, it may be changed for each current location based on map information (node, link information, sign information), and an input of a desired height of the operator is accepted from the operator and accepted. You may make it change based on height. In addition, when the regulation of the height of the object to be confirmed regarding traffic differs for each region such as a country, region, or local government, the adjustment unit 705 changes the height according to the region where the current location of the vehicle exists. Also good.

  Further, as a method for preventing the band-like image from blocking the front image, as shown in FIGS. 21 to 23, the band-like image may be expressed by only lines, and the inside may be transmitted without being filled with a predetermined color. (FIG. 21). Further, the belt-like image may be painted intermittently (that is, so as to form a stripe) instead of continuously (FIG. 22). Furthermore, only the both end portions of the belt-like image may be painted intermittently, and the inside may be transmitted without being painted with a predetermined color (FIG. 23).

  In this way, a part of the belt-like image (the sky route guidance display image) is displayed so as to be transparent, or displayed so as to be an intermittent belt-like route display image along the route. It is possible to reduce the portion of the image that is blocked.

  In addition, the belt-like image in FIG. 22 or FIG. 23 may be displayed so as to be constituted by an animation that moves in the traveling direction of the route. In other words, by periodically changing the portion to be painted, the belt-like image may appear to flow in the traveling direction like a blinking guide light on the runway. By displaying in this way, more reliable route guidance can be provided. In particular, when making a left or right turn at an intersection, it is possible to guide the route more reliably by displaying such a band image.

  FIG. 24 shows a display state of the sky route guidance display image in the navigation device according to the second embodiment. In FIG. 24, a sky route guidance display image (links 1001 and 1002) is displayed on the front window 2401.

  As described above, according to the present embodiment, more reliable route guidance can be realized by performing continuous route guidance along the route, and continuous route guidance can be superimposed on the actual scenery. By displaying, it is possible to ensure the driver's front view without obstructing obstacles ahead and contribute to safe driving.

  The navigation method and information display method described in this embodiment can be realized by executing a program prepared in advance on a computer such as a personal computer or a workstation. This program is recorded on a computer-readable recording medium such as a hard disk, a flexible disk, a CD-ROM, an MO, and a DVD, and is executed by being read from the recording medium by the computer. Further, these programs may be transmission media that can be distributed via a network such as the Internet.

DESCRIPTION OF SYMBOLS 100 Navigation apparatus 101 Current position information acquisition part 102 Route information acquisition part 103 Storage part 104 Generation part 105 Image acquisition part 106 Display part 300 Navigation apparatus 301 Current position information acquisition part 302 Route information acquisition part 303 Storage part 304 Generation part 305 Projection part 500 Information Display Device 501 Current Location Information Acquisition Unit 502 Route Information Acquisition Unit 503 Storage Unit 504 Generation Unit 505 Video Acquisition Unit 506 Display Unit 510 Imaging Unit

Claims (7)

Image acquisition means for acquiring an image including a road ahead of the moving body;
Display means for displaying a band-shaped route guidance image for guiding a direction to travel along a route from the current position of the moving body to a destination over the road surface of the road corresponding to the route in the video;
With
The information display device, wherein the display means displays the route guidance image while changing the position of the route guidance image in accordance with the height of the confirmation object in the area to which the current position of the moving body belongs.   2. The display unit according to claim 1, wherein the display unit displays the route guidance image by changing a height from the road surface according to a height of a confirmation target in an area to which the current position of the moving body belongs. The information display device described. A belt-shaped route guidance image that guides the direction to travel along the route from the current position of the moving body to the destination is projected onto a position that can be seen above the road surface of the road corresponding to the route on the window of the moving body. A projection means,
The information display device according to claim 1, wherein the projecting unit changes the position of the route guidance image according to the height of a confirmation target in an area to which the current position of the moving body belongs, and projects the position on the window of the moving body.   The information display device according to claim 1, wherein the confirmation target is a traffic signal, a sign, or a building. In the information display method executed in the information display device,
A video acquisition process for acquiring a video including a road ahead of the moving object;
A display step of displaying a band-shaped route guidance image that guides a direction to travel along a route from the current position of the moving body to a destination on the road surface of the road corresponding to the route in the video;
Including
The information display method characterized in that the display step displays the route guidance image while changing the position of the route guidance image in accordance with the height of the confirmation object in the area to which the current position of the moving body belongs.   An information display program for causing a computer to execute the information display method according to claim 5.   A computer-readable recording medium on which the information display program according to claim 6 is recorded.

Images