JP2016070736A - Display controller and display control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display controller and a display control method capable of virtually stereoscopically displaying a road image of an elevated road using a shadow image without giving a user an uncomfortable feeling.SOLUTION: A display controller comprises: a road display controller 121 for controlling a display 103 to display an elevated road image to be stereoscopically displayed and an ordinary road image; and a shadow display controller 124 for controlling the display 103 to display a shadow image extending along the elevated road image with respect to the elevated road image. The road display controller 121 controls the display 103 to display the ordinary road image after the shadow image is displayed on the display 103 and, if the shadow image and the ordinary road image are overlapped, display the shadow image under the ordinary road image.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a display control device and a display control method for controlling the display of a map screen, and in particular, is suitable for use in a display control device and a display control method for pseudo-stereoscopically displaying a road image of an elevated road. is there.

  Conventionally, a map display device such as a navigation device displays a shadow image along a road image of an elevated road such as an expressway (hereinafter referred to as “elevated road image”), thereby pseudo-stereoscopically displaying the elevated road image. Display method is used. This allows the user to intuitively understand the distinction between elevated road images and road images of other general roads (hereinafter referred to as “general road images”). Can be increased. In particular, there is a case where the ramp road and the general road are running side by side in the vicinity of the connection point between the ramp road of the elevated road and the general road. In this case, the road image of the ramp road (hereinafter referred to as “ramp road image”) is displayed in a pseudo three-dimensional manner by the shadow image, so that the two can be easily distinguished from each other.

  For example, in Patent Document 1 below, a road with a high priority (highway, national road, prefectural road, etc.) is drawn by drawing a band-like shadow image at a drawing position shifted from the road to the lower right. A technique for pseudo-stereoscopic display is disclosed.

JP 2002-297029 A

  However, in the conventional map display device, the shadow image is unnaturally displayed on the map screen, which may give the user a sense of discomfort. For example, FIG. 7 is a diagram showing a display example of a map screen by a conventional map display device. A map screen 700 shown in FIG. 7 includes a general road image 710, a ramp road image 720, and a shadow image 722. The ramp road image 720 is connected to the general road image 710 at the connection point P01. The shadow image 722 is a strip-shaped image that extends along the ramp road image 720 at a position shifted from the ramp road image 720 by a predetermined distance to the lower right in order to display the ramp road image 720 in a pseudo three-dimensional display.

  As shown in FIG. 7, the conventional map display device displays the shadow image 722 uniformly on the side of the entire section of the ramp road image 720. Further, the conventional map display device displays the general road image 710 and then displays the shadow image 722 in an overlapping manner. Therefore, as shown in FIG. 7, when the shadow image 722 and the general road image 710 overlap with each other, the display of the shadow image 722 is prioritized, and the general road image 710 is hidden by the shadow image 722.

  Here, the ramp road represented by the ramp road image 720 actually has an elevated structure in which the altitude gradually increases from the connection point P01. For this reason, in the vicinity of the connection point P01, the height difference between the general road and the ramp road is small. Nevertheless, as shown in FIG. 7, it is unnatural to perform stereoscopic display with the shadow image 722 uniformly from the connection point P01, rather than the merit of stereoscopic display of the ramp road image 720 with the shadow image 722. The disadvantage that the general road image 710 becomes difficult to see due to the shadow image 722 becomes larger.

  The present invention has been made to solve such a problem, and enables an elevated road image to be pseudo-stereoscopically displayed by a shadow image so as not to give the user a sense of incongruity. For the purpose.

  In order to solve the above-described problems, in the present invention, a shadow image extending along the road image of the elevated road is displayed on the display on the road image of the elevated road that is the target of stereoscopic display, and then the elevated road is displayed. A road image of a road other than the road is displayed on the display.

  According to the present invention configured as described above, when a shadow image of an elevated road and a road image of a road other than the elevated road overlap, the shadow image can be displayed under the road image of the other road. it can. For this reason, it can be prevented that the shadow image makes it difficult to see road images of other roads. In particular, when there is little difference in height between the elevated road and other roads, the shadow image will not be displayed preferentially over the road images of other roads. It can be a natural display according to the height difference between the road and other roads. Therefore, according to the present invention, the road image of the elevated road can be pseudo-stereoscopically displayed with the shadow image so as not to give the user a sense of incongruity.

It is a block diagram which shows the function structural example of the navigation apparatus which concerns on one Embodiment of this invention. It is a figure which shows the example of a display of the map screen by the navigation apparatus which concerns on one Embodiment of this invention. It is a flowchart which shows an example of the process by the navigation apparatus concerning one Embodiment of this invention. It is a figure which shows the specific example of the preparation procedure of the map screen by the navigation apparatus which concerns on one Embodiment of this invention. It is a flowchart which shows the modification of the process by the navigation apparatus which concerns on one Embodiment of this invention. It is a figure which shows the modification of the preparation procedure of the map screen by the navigation apparatus which concerns on one Embodiment of this invention. It is a figure which shows the example of a display of the map screen by the conventional map display apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Functional Configuration Example of Navigation Device 10]
FIG. 1 is a block diagram illustrating a functional configuration example of a navigation device 10 according to the present embodiment. The navigation device 10 is an example of a display control device described in the claims, and is a device mounted on a vehicle such as an automobile. However, the display control device described in the claims is not limited to this, and is applicable to devices other than the navigation device mounted on the vehicle (for example, portable navigation device, portable terminal such as a smartphone). can do.

  The navigation device 10 has, for example, a function for displaying a map screen around the current position of the vehicle, a route search function for searching for a guidance route to a destination arbitrarily set by the user, and a search, like a general navigation device And a route guidance function for guiding the vehicle to the destination based on the guided route.

  As shown in FIG. 1, the navigation device 10 according to this embodiment includes a map data storage unit 101, a current position detection device 102, and a display 103. Moreover, the navigation apparatus 10 is provided with the map screen display control part 120 as the function structure. In FIG. 1, the functions related to the present embodiment among the functions of the navigation device 10 are illustrated.

  The map data storage unit 101 stores map data. The map data includes node information of a plurality of nodes, road link information of a plurality of road links, facility data, place name data, and the like. Each node information includes, for example, an identification number and position coordinates. Each road link information includes, for example, an identification number of a connection destination node, a road type (for example, an expressway, a toll road, a general road, etc.), a road width, and the like.

  The current position detection device 102 detects the current position of the vehicle. The current position detection device 102 includes, for example, a GPS (Global Positioning System) and an autonomous navigation unit. The display 103 displays various information (mainly a map screen). As the display 103, for example, a liquid crystal display, an organic EL display or the like is used.

  The map screen display control unit 120 generates a map screen based on the map data stored in the map data storage unit 101 and causes the display 103 to display the map screen. As shown in FIG. 1, the map screen display control unit 120 includes a road display processing unit 121, a connection point specifying unit 122, a part specifying unit 123, and a shadow display processing unit 124.

  The road display processing unit 121 causes the display 103 to display a road image constituting the map screen based on the map data (node information and link information) stored in the map data storage unit 101. For example, the road display processing unit 121 generates a strip-shaped polygon image having a color and a road width according to the road width and the road type as a road image, and displays it on the display 103.

  The road image constituting the map screen includes an elevated road image and a road image of a road other than the elevated road (hereinafter simply referred to as “other road”). The elevated road is a road that is a target of pseudo three-dimensional display. Examples of the elevated road include an expressway and a toll road. Other roads include general roads. Note that the elevated road to be displayed in 3D display may be a specific elevated road or all elevated roads.

  The connection point specifying unit 122 specifies a connection point between the elevated road and another road. Specifically, the connection point specifying unit 122 refers to the map data stored in the map data storage unit 101, so that a road link whose road type belongs to an elevated road and a road whose road type belongs to another road. A node to which both links are connected is specified as a connection point between the elevated road and another road.

  The part specifying unit 123 includes a first part which is a part within a predetermined distance range from the connection point specified by the connection point specifying part 122 and a second part which is the other part of the elevated road. Identify. Specifically, the part specifying unit 123 specifies a road link within a predetermined distance range from the connection point specified by the connection point specifying unit 122 among the plurality of road links constituting the elevated road as the first part. Then, other road links are specified as the second part.

  The shadow display processing unit 124 causes the display 103 to display a shadow image extending along the elevated road image for the elevated road image. For example, as shown in FIG. 2, the shadow display processing unit 124 causes the display 103 to display a band-like and predetermined color (for example, gray) shadow image at a position shifted by a predetermined distance from the elevated road image to the lower right. .

  In particular, the shadow display processing unit 124 has the shadow display processing unit 124 in the first part specified by the part specifying unit 123 (that is, within a predetermined distance range from the connection point between the elevated road and another road). After the shadow image is displayed on the display 103, the road display processing unit 121 displays the general road image on the display 103. That is, the general road image is displayed so as to overlap the shadow image.

  On the other hand, in the second part specified by the part specifying unit 123 (that is, outside the predetermined distance range from the connection point between the elevated road and another road), the shadow display processing unit 124 After the general road image is displayed on the display 103, the shadow display processing unit 124 displays the shadow image on the display 103. That is, the shadow image is displayed so as to overlap the general road image.

  Each of the functional blocks 121 to 124 can be configured by any of hardware, DSP (Digital Signal Processor), and software. For example, when configured by software, each of the functional blocks 121 to 124 is actually configured by including a CPU, RAM, ROM, etc. of a computer, and a program stored in a recording medium such as RAM, ROM, hard disk, or semiconductor memory. Is realized by operating.

[Display example of map screen by navigation device 10]
FIG. 2 is a diagram showing a display example of a map screen by the navigation device 10 according to the embodiment of the present invention. A map screen 200 shown in FIG. 2 includes a general road image 210, a ramp road image 220, a shadow image 222, a general road image 230, facility images 232 and 234, and place names 236 and 238. ing.

  The ramp road image 220 is an example of an elevated road image. The general road images 210 and 230 are examples of general road images. The ramp road image 220 is connected to the general road image 210 at the connection point P1. The ramp road image 220 crosses over the general road image 230. The shadow image 222 is a belt-like image extending along the ramp road image 220 at a position shifted from the ramp road image 220 to the lower right by a predetermined distance in order to display the ramp road image 220 in a pseudo three-dimensional display. In FIG. 2, an arc-shaped boundary line S indicates a predetermined distance range from the connection point P1.

  As shown in FIG. 2, the navigation device 10 of the present embodiment displays the shadow image 222 and then overlays the general road image 210 within the predetermined distance range from the connection point P1, thereby displaying the shadow image. A map screen 200 on which the general road image 210 is displayed with priority over 222 is formed. In addition, the navigation device 10 according to the present embodiment displays a shadow image 222 in an overlapping manner after displaying the general road image 230 outside the predetermined distance range from the connection point P 1, so that the shadow image 222 is displayed more than the general road image 230. A map screen 200 on which the image 222 is preferentially displayed is formed.

  Generally, in the vicinity of the connection point between the ramp road and the general road, the height difference between the ramp road and the general road is relatively small. On the other hand, the height difference between the ramp road and the general road is relatively large at a location away from the connection point between the ramp road and the general road. Therefore, as shown in FIG. 2, the navigation device 10 of the present embodiment gives priority to the display of the general road image 230 over the shadow image 222 at a location near the connection point P1, and away from the connection point P1. In this case, the display of the shadow image 222 is prioritized over the general road image 230. Thereby, the navigation apparatus 10 of this embodiment can display the shadow image 222 in a natural display form corresponding to the height difference between the actual ramp road and the general road, which gives the user a sense of incongruity. Can be prevented.

[Example of processing by navigation device 10]
FIG. 3 is a flowchart showing an example of processing by the navigation device 10 according to the present embodiment. For example, in the process illustrated in FIG. 3, the map screen display control unit 120 causes the display 103 to display a map screen (for example, a map screen around the current position of the vehicle, a map screen around a point arbitrarily designated by the user). It is executed when displaying.

  First, the connection point specifying unit 122 specifies a connection point between the elevated road and another road (step S302). Next, the part specific | specification part 123 specifies the 1st part which is a part within a predetermined distance range from the connection point specified by step S302 among the elevated roads (step S304). Moreover, the part specific | specification part 123 specifies the 2nd part which is a part outside a predetermined distance range from the connection point specified by step S302 among the elevated roads (step S306).

  Next, the shadow display processing unit 124 causes the display 103 to display a shadow image of the first portion of the elevated road identified in step S304 (step S308). Then, the road display processing unit 121 displays a general road image on the display 103 (step S310). Further, the shadow display processing unit 124 causes the display 103 to display a shadow image of the second portion of the elevated road identified in step S306 (step S312). Further, the road display processing unit 121 displays an elevated road image on the display 103 (step S314).

  Thereafter, the map screen display control unit 120 displays other images (for example, facilities, place names, etc.) on the display 103 (step S316). And the navigation apparatus 10 complete | finishes a series of processes illustrated in FIG.

[Specific example of map screen creation procedure]
FIG. 4 is a diagram showing a specific example of a procedure for creating a map screen by the navigation device 10 according to the embodiment of the present invention. Hereinafter, a specific procedure for creating a map screen according to the flowchart shown in FIG. 3 will be described with reference to FIG.

  First, the connection point specifying unit 122 specifies a connection point P1 between the elevated road and another road. And the part specific | specification part 123 is from the connection point P1, the 1st part which is a part within the predetermined distance range (inside the circular arc-shaped boundary line S which has the radius r) from the connection point P1 among the elevated roads. A second portion that is a portion outside the predetermined distance range (outside the boundary line S) is specified.

  For example, in the example shown in FIG. 4A, a node B to which another road composed of links L1 to L2 and an elevated road composed of links L3 to L6 are connected is a connection point between the elevated road and another road. Identified as P1. And among the links L3 to L6 constituting the elevated road, the links L3 to L5 connected to the nodes within the predetermined distance range (inside the boundary line S) from the connection point P1 are specified as the first part, A link L6 that is not connected to a node within a predetermined distance range (inside the boundary line S) from the connection point P1 is specified as the second portion. In the example shown in FIG. 4A, the link L5 that extends both within the predetermined distance range and outside the predetermined distance range is used as the first portion, but may be the second portion.

  Next, the shadow display processing unit 124 causes the display 103 to display a shadow image of the first portion of the elevated road. For example, in the example shown in FIG. 4B, shadow images 222 a of links L <b> 3 to L <b> 5 constituting the first part of the elevated road are displayed on the display 103.

  Next, the road display processing unit 121 displays a general road image on the display 103. For example, in the example illustrated in FIG. 4C, general road images 210 and 230 are displayed on the display 103.

  Next, the shadow display processing unit 124 causes the display 103 to display a shadow image of the second portion of the elevated road. For example, in the example shown in FIG. 4D, a shadow image 222b of the link L6 that forms the second part of the elevated road is displayed on the display 103.

  Next, the road display processing unit 121 displays an elevated road image on the display 103. For example, in the example illustrated in FIG. 4E, the elevated road image 220 is displayed on the display 103.

  Finally, the map screen display control unit 120 displays other images (for example, facilities, place names, etc.) on the display 103, thereby completing the map screen. For example, in the example illustrated in FIG. 4F, facility images 232 and 234 and place names 236 and 238 are displayed on the display 103 as other images. Thereby, a map screen similar to the map screen 200 shown in FIG. 2 is displayed on the display 103.

  That is, by creating the map screen by the above-described creation procedure, the display of the general road image 210 is prioritized over the shadow image 222a within a predetermined distance range from the connection point P1, and a predetermined distance from the connection point P1. Outside the distance range, a map screen with natural stereoscopic display in which display of the shadow image 222b is prioritized over the general road image 230 is formed.

[Modification]
Hereinafter, a modification of the present embodiment will be described with reference to FIGS. In this modification, the shadow image, the general road image, and the elevated road image of the elevated road within the predetermined distance range from the connection point between the elevated road and the other road are displayed on the display 103 first. Thereafter, a general road image, a shadow image, and an elevated road image outside a predetermined distance range from the connection point between the elevated road and another road are displayed on the display 103.

[Modification of Processing by Navigation Device 10]
FIG. 5 is a flowchart showing a modified example of processing by the navigation device 10 according to the present embodiment.

  In this modification, first, the connection point specifying unit 122 specifies a connection point between the elevated road and another road (step S502). Next, the part specific | specification part 123 specifies the 1st part which is a part within a predetermined distance range from the connection point specified in step S502 among the elevated roads (step S504). Moreover, the part specific | specification part 123 specifies the 2nd part which is a part outside a predetermined distance range from the connection point specified by step S502 among elevated roads (step S506).

  Next, the shadow display processing unit 124 causes the display 103 to display a shadow image of the first portion of the elevated road identified in step S504 (step S508). Then, the road display processing unit 121 causes the display 103 to display a general road image that is within a predetermined distance range from the connection point specified in step S502 (step S510). Further, the road display processing unit 121 causes the display 103 to display an elevated road image of the first portion of the elevated road identified in step S504 (step S512).

  Next, the road display processing unit 121 causes the display 103 to display a general road image that is outside the predetermined distance range from the connection point specified in step S502 (step S514). Then, the shadow display processing unit 124 causes the display 103 to display a shadow image of the second part of the elevated road specified in step S506 (step S516). Further, the road display processing unit 121 causes the display 103 to display the elevated road image of the second portion of the elevated road identified in step S506 (step S518).

  Thereafter, the map screen display control unit 120 displays other images (for example, facilities, place names, etc.) on the display 103 (step S520). And the navigation apparatus 10 complete | finishes a series of processes illustrated in FIG.

[Variation of map screen creation procedure]
FIG. 6 is a diagram showing a modification of the map screen creation procedure by the navigation device 10 according to the embodiment of the present invention. A specific procedure for creating a map screen according to the flowchart shown in FIG. 5 will be described below with reference to FIG.

  First, the connection point specifying unit 122 specifies a connection point P1 between the elevated road and another road. And the part specific | specification part 123 is from the connection point P1, the 1st part which is a part within the predetermined distance range (inside the circular arc-shaped boundary line S which has the radius r) from the connection point P1 among the elevated roads. A second portion that is a portion outside the predetermined distance range (outside the boundary line S) is specified.

  For example, in the example shown in FIG. 6A, a node B to which another road composed of links L1 to L2 and an elevated road composed of links L3 to L6 is connected is a connection point between the elevated road and another road. Identified as P1. Of the links L3 to L6 constituting the elevated road, the links L3 to L5 that are within a predetermined distance range (inside the boundary line S) from the connection point P1 are specified as the first part, and the connection point P1 The link L6 that is a portion outside the predetermined distance range (outside the boundary line S) is specified as the second portion. In the example shown in FIG. 6A, the link L5 that extends both within the predetermined distance range and outside the predetermined distance range is used as the first portion, but may be the second portion.

  Next, the shadow display processing unit 124 causes the display 103 to display a shadow image of the first portion of the elevated road. For example, in the example shown in FIG. 6B, shadow images 222 a of links L <b> 3 to L <b> 5 constituting the first part of the elevated road are displayed on the display 103.

  Next, the road display processing unit 121 causes the display 103 to display a general road image that is within a predetermined distance range from the connection point P1. For example, in the example illustrated in FIG. 6C, a general road image 210 that is a general road image within a predetermined distance range from the connection point P <b> 1 is displayed on the display 103.

  Next, the road display processing unit 121 causes the display 103 to display an elevated road image of the first portion of the elevated road. For example, in the example shown in FIG. 6D, road images 220a of links L3 to L5 constituting the first part of the elevated road are displayed on the display 103.

  Next, the road display processing unit 121 causes the display 103 to display a general road image that is outside a predetermined distance range from the connection point P1. For example, in the example illustrated in FIG. 6E, a general road image 230 that is a general road image outside a predetermined distance range from the connection point P <b> 1 is displayed on the display 103.

  Next, the shadow display processing unit 124 causes the display 103 to display a shadow image of the second portion of the elevated road. For example, in the example shown in FIG. 6F, the shadow image 222b of the link L6 that forms the second part of the elevated road is displayed on the display 103.

  Next, the road display processing unit 121 causes the display 103 to display an elevated road image of the second part of the elevated road. For example, in the example shown in FIG. 6G, the road image 220b of the link L6 constituting the second part of the elevated road is displayed on the display 103.

  Finally, the map screen display control unit 120 displays other images (for example, facilities, place names, etc.) on the display 103, thereby completing the map screen. For example, in the example illustrated in FIG. 6H, facility images 232 and 234 and place names 236 and 238 are displayed on the display 103 as other images. Thereby, a map screen similar to the map screen 200 shown in FIG. 2 is displayed on the display 103.

  That is, by creating the map screen by the above-described creation procedure, the display of the general road image 210 is prioritized over the shadow image 222a within a predetermined distance range from the connection point P1, and a predetermined distance from the connection point P1. Outside the distance range, a natural stereoscopic display map screen in which the display of the shadow image 222b is given priority over the general road image 230 is formed.

  As described above, according to the present embodiment (and the modification thereof), in the vicinity of the connection point P1 where the height difference between the elevated road and other roads is small, the elevated road is displayed below the general road image 210. A shadow image 222 can be displayed. For this reason, it can be prevented that the general road image 210 becomes difficult to see due to the shadow image 222. In addition, the stereoscopic display by the shadow image 222 can be a natural display according to the height difference between the actual elevated road and another road.

  Further, according to the present embodiment, the general road image 230 is displayed below the shadow image 222 of the elevated road at a location separated from the connection point P1 where the height difference between the elevated road and another road is large. Can do. For this reason, the three-dimensional display by the shadow image 222 can be made into a natural display according to the height difference between an actual elevated road and another road.

  In the above embodiment, the portion of the elevated road that is within the predetermined distance range from the connection point is the first portion and the other portion is the second portion. However, the present invention is not limited to this. For example, in the elevated road, a part constituted by a predetermined number of road links from the connection point may be the first part, and the other part may be the second part. For example, in the example of FIG. 4, when the predetermined number is “2”, the road links L3 and L4 may be the first part and the road links L5 and L6 may be the second part.

  In addition, each of the above-described embodiments is merely an example of implementation in carrying out the present invention, and the technical scope of the present invention should not be construed in a limited manner. That is, the present invention can be implemented in various forms without departing from the gist or the main features thereof.

10 Navigation device (display control device)
DESCRIPTION OF SYMBOLS 101 Map data memory | storage part 102 Current position detection apparatus 103 Display 120 Map screen display control part 121 Road display process part 122 Connection point specific part 123 Partial specific part 124 Shadow display process part

Claims (4)

A display control device for controlling display of a map screen,
A road display processing unit for displaying on the display a road image of an elevated road that is a subject of stereoscopic display and a road image of a road other than the elevated road;
A shadow display processing unit for displaying a shadow image extending along the road image of the elevated road on the display with respect to the road image of the elevated road,
The road display processing unit
The display control apparatus, wherein after the shadow display processing unit displays the shadow image on the display, the road image of the other road is displayed on the display. A connection point specifying unit for specifying a connection point between the other road and the elevated road;
A part specifying part for specifying a first part that is a part within a predetermined distance range from the connection point and a second part that is a part other than the connection point of the elevated road,
In the first part specified by the part specifying unit, the road display processing unit displays the road image of the other road after the shadow display processing unit displays the shadow image on the display. Displayed on the
In the second part specified by the part specifying unit, the shadow display processing unit displays the shadow image on the display after the road display processing unit displays a road image of the other road on the display. The display control apparatus according to claim 1, wherein the display control apparatus displays the display. A connection point specifying unit for specifying a connection point between the other road and the elevated road;
A part specifying unit that specifies a first part that is a part constituted by a predetermined number of road links from the connection point and a second part that is the other part of the elevated road; and
In the first part specified by the part specifying unit, the road display processing unit displays the road image of the other road after the shadow display processing unit displays the shadow image on the display. Displayed on the
In the second part specified by the part specifying unit, the shadow display processing unit displays the shadow image on the display after the road display processing unit displays a road image of the other road on the display. The display control apparatus according to claim 1, wherein the display control apparatus displays the display. A display control method for controlling display of a map screen,
A shadow display process in which the shadow display processing unit of the display control device displays a shadow image extending along the road image of the elevated road on a display with respect to the road image of the elevated road targeted for stereoscopic display;
A road display step in which a road display processing unit of the display control device displays a road image of a road other than the elevated road on the display after the shadow image is displayed on the display in the shadow display step; A display control method comprising:

Images