CN112710321A

CN112710321A - Intersection guiding method and intersection guiding device

Info

Publication number: CN112710321A
Application number: CN202011516333.1A
Authority: CN
Inventors: P·霍尔策; 元然戟; 王鹏
Original assignee: Daimler AG
Current assignee: Mercedes Benz Group AG
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-04-27

Abstract

The present invention relates to the field of navigation. In particular to a crossing guiding method, which comprises the following steps: generating an intersection guide view when the user is approaching an intersection, the intersection guide view including a road diagram, a path diagram indicating a path for recommending a path, and a user position icon displaying a real-time position of the user; wherein, in a case where three immediately adjacent intersections are to be successively passed through in order to reach the destination, when the user is approaching a first intersection of the three immediately adjacent intersections, a first intersection guidance view for guiding through the first intersection and a second intersection is generated, and once the user passes through the first intersection, the first intersection guidance view is switched to a second intersection guidance view for guiding through the second intersection and a third intersection. The invention also relates to a corresponding intersection guiding device. The intersection guidance scheme of the invention can simultaneously display specific lane information and the real-time position of a user in the process of crossing the intersection.

Description

Intersection guiding method and intersection guiding device

Technical Field

The invention relates to an intersection guiding method. In addition, the invention also relates to an intersection guiding device.

Background

In conventional mapping and navigation applications, it is often necessary to guide a user through a complex intersection by means of a plurality of visual indication information, such as intersection layout, lane recommendation and distance indication from the current position to the intersection. Such information is distracting and abstract and does not provide intuitive and concise guidance assistance to the user.

Therefore, in the prior art, it is proposed to prepare corresponding bitmaps for each intersection in advance. Although the bitmap can accurately show the status of the intersection, it must rely on additional elements, such as distance bars, to convey his distance from the intersection to the user, and the bitmap cannot show the user's progress and dynamic position in reaching and passing through the intersection, and because it is pre-made, it requires a large storage space and a slow update rate, resulting in possibly incorrect information being displayed to the user.

In addition, another intersection guidance commonly used in the prior art is map-based intersection guidance, which, while showing the progress and dynamic position of the user in reaching and passing through the intersection, either lacks visual details of the intersection condition (e.g., a slope, a narrow bifurcation, etc.), or requires magnification to show details such as a lane, which often loses the progress and dynamic position display.

Accordingly, it would be desirable to provide an intersection guidance scheme that can simultaneously display specific lanes and lane connection information as well as the user's progress and dynamic position in reaching and passing through an intersection.

Disclosure of Invention

The object of the invention is achieved by an intersection guidance method, comprising: generating an intersection guidance view capable of being displayed by means of a display device when a user is approaching an intersection, the intersection guidance view including a static road representation depicting a road connected to the intersection, a path representation indicating recommended paths for reaching and passing through the intersection, and a dynamic user position icon for displaying a real-time position of the user; wherein, in a case where three immediately adjacent intersections are to be successively passed through in order to reach the destination, when the user is approaching a first intersection of the three immediately adjacent intersections, a first intersection guidance view for guiding through the first intersection and a second intersection of the three immediately adjacent intersections located downstream of the first intersection is generated, and once the user passes through the first intersection, the first intersection guidance view is switched to a second intersection guidance view for guiding through the second intersection and a third intersection of the three immediately adjacent intersections located downstream of the second intersection.

According to an alternative embodiment of the invention, the road representation is in the form of a polygonal mesh, wherein mesh parts of the polygonal mesh representing road segments are assigned different weights such that they are not drawn exactly to scale.

According to an alternative embodiment of the invention, the path diagram is added as a path polygon above a polygon representing the recommended lane in the polygon mesh, wherein the path polygon has a higher visual characteristic than the polygon mesh.

According to an alternative embodiment of the invention, the path polygon is configured such that its transparency profile varies as the user position moves.

According to an alternative embodiment of the present invention, the user location icon is configured to move in the intersection guide view as the user location moves.

According to an alternative embodiment of the invention, the path polygon is configured to: during the movement of the user position icon, the transparency of the part of the user position icon, which is positioned in front of the user position icon in the extending direction of the path, is always lower than that of the part of the user position icon, which is positioned behind the user position icon.

According to an alternative embodiment of the invention, if the location information of the user at the lane level cannot be obtained, the user location icon is moved along the center line of the recommended lanes, for example on the lane dividing lines located at the center of these recommended lanes.

According to an alternative embodiment of the invention, the polygon mesh is caused to naturally fade out in the intersection guidance view by setting UV texture coordinates of the polygon mesh, wherein the path polygon has a different UV texture design than the polygon mesh.

According to an alternative embodiment of the invention, when two consecutive intersections are close enough, consecutive road representations and path representations of the two intersections are shown in the same intersection guidance view.

According to another aspect, the object of the present invention is achieved by an intersection guidance device comprising a processor and a computer readable storage medium communicatively connected to the processor, the computer readable storage medium having stored therein computer instructions which, when executed by the processor, implement the steps of the intersection guidance method according to the present invention.

The real-time guidance system of the present invention aims to visualize complex traffic conditions as a concise and understandable animation. Compared with the prior art, the method has the following core advantages:

a) combination and intelligent merging of various information: the system can simultaneously display specific lanes and lane connection information as well as the progress and dynamic position of a user in the process of arriving at and passing through an intersection; since it is shown in a 3D perspective view, it can visually show the difference between a flat road and an up-ramp leading to a viaduct or a down-ramp leading to a tunnel, and can visually show special cases such as country borders or toll booths and their specific lane payment attributes (ETC or cash or mix).

b) A plurality of successive intersections: current real-life bitmaps do not clearly show multiple successive intersections in close proximity to each other. However, the real-time intersection guidance according to the present invention can display at least two intersections in one view, and can concatenate an arbitrary number of closely successive intersections into one continuous guidance animation.

c) Intelligent resynthesis of visual core information: in order to make all of this core information readable in a quick and simple manner, real-time intersection guidance contains a mechanism to ensure that the generated view displays all elements of the intersection in sufficient space in a manner that is legible and understandable to the driver;

d) automatic updating: since the intersection guidance of the invention is created and rendered from the road lane & link database at run-time, this means that any update on the database (e.g. new road being built or highway being built, etc.) will automatically update the real-time guidance view, whereas existing solutions (e.g. static bitmap or joined view) will require updating the whole image in the system.

e) Adjustability: the output of a real-time intersection according to the present invention is rendered on-screen in operation through the OpenGL ES 3.0API supported by the GLES 3.0 shader. This allows the generated view to be highly scalable and provides the design department with maximum controllability of the view. It allows the same intersection to be presented as a small-resolution but high-contrast view for heads-up display (current bitmaps are visually too complex to display in a HUD) and as a high-resolution full-fidelity view for the center screen. The design of the view can be easily updated remotely by simply changing some parameters or lines of code of the shader applied. In contrast, altering the prior art bitmap guide image would mean manually adjusting thousands of fixed image files.

f) Storage efficiency: the real-time intersection guidance according to the invention does not rely on any pre-generated images, but is always created purely from existing database information at run-time. Therefore, it does not require additional storage space. In contrast, the prior art bitmaps require considerable storage space.

Further advantages and advantageous embodiments of the inventive subject matter are apparent from the description, the drawings and the claims.

Drawings

Further features and advantages of the present invention will be further elucidated by the following detailed description of an embodiment thereof, with reference to the accompanying drawings. The attached drawings are as follows:

fig. 1 is a block diagram showing a structure of an intersection guidance device according to an exemplary embodiment of the present invention;

FIG. 2 shows a flow diagram of an intersection guidance method according to an exemplary embodiment of the present invention;

FIG. 3 illustrates a road link stored with a particular logical symbol;

FIG. 4 illustrates a polygon mesh generated by an intersection guidance method according to the present invention;

fig. 5 shows one screen of an intersection guidance view generated by the intersection guidance method according to the present invention;

fig. 6 shows another screen of an intersection guidance view generated by the intersection guidance method according to the present invention;

FIG. 7 shows an intersection guidance view suitable for HUD generated by the intersection guidance method according to the present invention;

FIG. 8 illustrates an intersection guidance view for a control screen in a vehicle generated by the intersection guidance method according to the present invention;

FIG. 9 shows UV texture coordinates of an intersection guidance view according to the present invention;

10-39 illustrate various embodiments of a base mold for an intersection guide view in accordance with the present invention; and

fig. 40 shows a flowchart of one step of an intersection guidance method according to an exemplary embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and exemplary embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention. In the drawings, the same or similar reference numerals refer to the same or equivalent parts.

Fig. 1 shows a block diagram of an intersection guidance device 1, which can be used for a vehicle, for example, according to an exemplary embodiment of the present invention. The intersection guidance device 1 comprises a processor 50 and a computer readable storage medium 20 communicatively connected to the processor 50, the computer readable storage medium 20 having stored therein computer instructions which, when executed by the processor 50, implement the steps of the intersection guidance method according to the present invention which will be described in detail hereinafter.

The display device 30 is in communication connection with the processor 50 for displaying an intersection guidance view generated by means of the intersection guidance device 1, which will be explained in detail below. The display device 30 may be, for example, a center screen mounted on a vehicle, a head-up display (HUD), a display device mounted at a dashboard, and/or a display screen of a smart device, such as a cell phone.

The positioning device 40 is communicatively coupled to the processor 50. The positioning device 40 is preferably configured to determine the position information of the user at the lane level, i.e. the determined position information of the user can be accurate to the lane.

FIG. 2 shows a flow diagram of an intersection guidance method 100, such as may be used for a vehicle, according to an exemplary embodiment of the present invention.

In step S110, the position of the user, in particular in which lane the vehicle is driving, is monitored in real time by means of the positioning device 40.

In step S120, an intersection guidance view 200, see fig. 5-6, is generated and displayed in real time as the user is approaching and passing through an intersection, wherein the intersection guidance view includes a static road representation 60 depicting roads near the intersection, a dynamic path representation 70 indicating recommended paths for reaching and passing through the intersection, and a dynamic user position icon 80 for displaying the user' S real-time position.

Here, "real-time" should be understood to mean that the intersection guidance view is not a pre-made and pre-stored image, but is generated when the user approaches the intersection.

According to an exemplary embodiment, step S120 further comprises (see fig. 40):

in step S121, when the user is approaching an intersection, information of roads connected to one or two upcoming intersections is retrieved. This means that if two successive intersections that are upcoming are close enough to each other, the road information is retrieved for both intersections; otherwise, only the road information of an upcoming intersection is retrieved.

According to an exemplary embodiment, it may be determined when to retrieve road information for an intersection based on a distance of a user location from the intersection. For example, the retrieval is performed when the user location is less than a preset threshold from the intersection. Advantageously, the threshold value may be set differently according to the type of road the user leads to the intersection from the current position. For example, there may be a larger threshold for highways, such as 500-800 meters, and a smaller threshold for downtown highways, such as 200-300 meters.

According to an exemplary embodiment, the road information may include lane information and link information, which in turn includes, for example, link information between roads and link information before a lane.

According to an exemplary embodiment, relevant road information may be retrieved from a road lane & link database located in a remote server or vehicle. The road lane & link database may be updated periodically, and thus the retrieved road information for generating the intersection guide view is always up to date. Illustratively, the road lane & link database may be configured as a logical database.

In the example shown in fig. 3, the road link 11 is stored in the road lane & link database with the logical symbol "S | SR | R".

Next, in step S122, a two-dimensional polygon mesh 12 as a graphic representation of an intersection road is generated based on the retrieved road information, as shown in fig. 4A. This means that the polygonal mesh 12 depicts the road layout of one or two upcoming intersections.

According to an example, the geometry of the polygonal mesh 12 is determined by: on the one hand, the geometry of the real road, for example the curvature of the road and the course relative to one another, is taken into account, and on the other hand, different weights are assigned to the individual road sections of the intersection, for example the road section being traveled on, the road section to be traveled on, and the connecting sections between these two road sections. This means that the polygonal mesh, although reflecting to some extent the geometry of a real road, is not drawn exactly to scale between the mesh parts representing road segments. For example, the ratio of the distance from the starting point of the polygonal mesh to the first intersection to the distance from the first intersection to the second intersection is different from the real-world distance ratio. In this way, the generated intersection guidance view can get rid of the real world size constraint, while all elements can be shown in the same screen in reasonable size and position, without any elements, such as lane arrows, being difficult to read due to being too small, nor any elements being difficult to read due to being out of position, such as an intersection being in a very biased position in the view, whereby the user can fully understand the guidance information with only a short glance or glance. It should be noted here that although the intersection guidance view is reprocessed and resynthesized for the real-world dimensions, the real-time user position is still correctly displayed in the intersection guidance view, i.e., the ratio of the distance the user travels in the real-world to the distance the user position icon 80 moves in the intersection guidance view is fixed for the same road segment. Of course, the ratio is variable between different road segments.

According to an example, the polygonal mesh 12 is adjusted such that each road section connected to an intersection has as small a length as possible, thereby achieving optimal readability.

According to an example, the width of each road section of the polygonal mesh 12 is determined by the number of lanes. In particular, such that all lanes in the polygonal mesh 12 have the same width, then the width of a road section is approximately equal to the product of the lane width and the number of lanes in the corresponding road section, as shown in fig. 4A. In this case, respective default widths may be preset for lanes of various types of roads.

Alternatively, the road section of the polygonal mesh 12' lacking the lane information is made to have no lane separation line, as shown in fig. 4B, and the width of the road section may be determined based on its road type. In this case, a corresponding default width may be preset for each road type. Additionally or alternatively, the rank of a road section lacking lane information relative to other road sections having lane information may also be taken into account when setting the road width for that road section. For example, the secondary road may have a smaller road width than the primary road.

According to an example, if lane link information between road sections is missing, only the connections between road sections are simply shown and the lane link lines between road sections are made to be broken, as shown by the polygonal mesh 12 "in fig. 4C.

Then, in step S123, a three-dimensional intersection guide view 200 to be displayed to the user is generated from the two-dimensional polygon mesh 12, see fig. 5, in which the intersection guide view 200 includes the road polygons 134 serving as the road illustrations 60 and the path illustrations 70 indicating the recommended paths. The intersection guidance view 200 may include intersection guidance information for one or two intersections according to the distance between intersections. Illustratively, when two successive intersections are close enough, consecutive road representations 60 and path representations 70 for the two intersections are shown in the same intersection guidance view 200. For example, in the case where the high-speed exit is immediately downstream of a branched intersection, the high-speed exit and the branched intersection can be displayed in the same intersection guidance view 200.

According to an advantageous embodiment of the present invention, in a case where three or more immediately adjacent intersections are to be successively traversed in order to reach the destination, when the user approaches a first intersection among the intersections, a first intersection guidance view for guiding through the first intersection and a second intersection located downstream of the first intersection is generated, and once the user has traversed the first intersection, the first intersection guidance view is switched to a second intersection guidance view for guiding through the second intersection and a third intersection located downstream of the second intersection, and so on. This applies, for example, to the case where the distance between each two adjacent intersections is less than the corresponding preset threshold.

According to an exemplary embodiment, in generating the three-dimensional intersection guide view 200 from the two-dimensional polygonal mesh 12, the corresponding direction indication arrows 131 are respectively added to all lanes leading to the intersection. Additionally, the direction indication arrow 131a in the recommended path corresponding to the recommended travel direction has a visual feature, such as a highlighted color scheme and/or a dynamic visual effect, that is highlighted compared to the other arrows, such as shown in fig. 6.

According to an exemplary embodiment, in generating the three-dimensional intersection guide view 200 from the two-dimensional polygon mesh 12, the form of the lane separation line 132 in the road polygon 134 is determined from the actual lane information. In this regard, the form of the lane separation line 132 may be determined in accordance with the rules of traffic indication lines in the real world. For example, the lane dividing line for which the lane crossing is allowed takes the form of a broken line, and the lane dividing line for which the lane crossing is not allowed takes the form of a solid line. Additionally, in the absence of actual lane information, the corresponding lane separation line may be made to take the form of a dashed line.

According to an exemplary embodiment, in generating the three-dimensional intersection guide view 200 from the two-dimensional polygonal mesh 12, the boundary of the road is drawn as an oblong rectangular solid 133, and the rectangular solid 133 protrudes from the road surface by an appropriate height.

According to an exemplary embodiment, in generating the three-dimensional intersection guidance view 200 from the two-dimensional polygon mesh 12, the path diagram 70 is added as a path polygon above the polygon representing the recommended lane. For ease of recognition, the path polygons have highlighted visual features, e.g., are rendered in colors that are more attractive to view than other lanes and/or have dynamic visual effects such as blinking. Illustratively, the path polygon 70 is rendered blue with the other lanes rendered black. Additionally, the path polygon representing the path illustration 70 has a corresponding geometric design and size to the lane polygon representing the recommended lane.

Since the real-time intersection guidance is created as a 3D polygon structure, it can highlight topological features, such as uphill roads leading to an overhead or downhill roads leading to a tunnel, and special structures like toll booths or country borders.

Additionally or alternatively, as shown in fig. 5-8, in the generated intersection guide view 200, the area representing the road surface is made to have a different color or texture design than the area located outside the road surface.

According to an example, in generating the three-dimensional intersection guide view 200 from the two-dimensional polygon mesh 12, the road polygons 134 are naturally faded out in the intersection guide view 200 by appropriately setting the UV texture coordinates of the road polygons 134. To this end, as shown in fig. 9, the road polygon 134 may be made to be contained in the UV field from U0.0/V0.0 to U1.0/V1.0, such that the vertical center of the road polygon 134 is generally located near U0.5, such that the top end of the road polygon 134 must generally be V1.0, and/or such that the leftmost and rightmost ends of the road polygon 134 representing the lateral branches are U1.0 or U0.0.

Additionally or alternatively, as shown in fig. 9, the path polygon 70 indicating the recommended path is made to have a different UV texture design than the road polygon 134. Illustratively, the V coordinate in the UV texture coordinates for the path polygon 70 describes the progress of the path, with the start of the path polygon being V0.0 and the end being V1.0. Illustratively, the vertices of the left edge of path polygon 70 are generally designated as U0.0, and the vertices of the right edge of path polygon 70 are generally designated as U1.0.

Fig. 10, 11 and 12 show a first, a second and a third group of base moulds 10, 11 and 12 for an intersection guidance view 200 according to the invention, which are suitable for branching intersections branching a further type of road from one type of road, for example highway exits, wherein the first group of base moulds 10 relates to a single branching intersection, the second group of base moulds 11 relates to two immediately adjacent branching intersections and the third group of base moulds 12 relates to a double branching intersection.

Fig. 13, 14 and 15 show fourth, fifth and sixth groups of

base molds

13, 14 and 15 for the intersection guidance view 200 according to the present invention, which are suitable for a bifurcation intersection divided from a current road into two or more branch roads of the same type as the current road, wherein the fourth group of base molds 13 relates to a single bifurcation intersection, the fifth group of base molds 14 relates to two immediately adjacent bifurcation intersections, and the sixth group of base molds 15 relates to a multiple bifurcation intersection.

Fig. 16, 17 and 18 show a seventh, eighth and ninth set of base moulds 16, 17 and 18 for an intersection guidance view 200 according to the invention, which are suitable for branching off from one type of road to intersections leading to special road sections, for example, additional types of roads such as uphill slopes, downhill slopes, tunnels and overpasses, wherein the seventh set of base moulds 16 relates to a single branch intersection, the eighth set of base moulds 17 relates to two immediately adjacent branch intersections and the ninth set of base moulds 18 relates to multiple branch intersections.

Fig. 19, 20 and 21 show tenth, tenth and twelfth sets of

base molds

19, 20 and 21 for the intersection guidance view 200 according to the present invention, which are adapted to be divided from the current road into two or more intersections of the same type as the current road leading to a special section of road, such as an uphill road, a downhill road, a tunnel and an overpass, wherein the tenth set of base molds 19 relates to a single bifurcation intersection, the eleventh set of base molds 20 relates to two immediately adjacent bifurcation intersections, and the twelfth set of base molds 21 relates to a multiple bifurcation intersection.

Fig. 22 and 23 show a tenth and a fourteenth set of

base models

22 and 23 for an intersection guide view 200 according to the present invention, which are applicable to general intersections of urban roads, wherein the thirteenth set of base models 22 relates to a single intersection and the fourteenth set of base models 23 relates to two adjacent intersections.

Fig. 24 and 25 show a fifteenth and sixteenth set of

base models

24 and 25 for an intersection guidance view 200 according to the present invention, which are suitable for complex intersections of urban roads, wherein the fifteenth set of base models 24 relates to a single intersection and the sixteenth set of base models 25 relates to two immediately adjacent intersections.

Fig. 26 and 27 show seventeenth and eighteenth groups of

base molds

26 and 27 for intersection guide view 200, suitable for a 180 ° turning intersection, wherein the seventeenth group of base molds 26 relates to a single turning intersection and the eighteenth group of base molds 27 relates to a double intersection, according to the present invention.

Fig. 28 and 29 show nineteenth and twentieth sets of

base molds

28 and 29 for an intersection guidance view 200 according to the present invention, which are suitable for switching intersections to a parallel road, wherein the nineteenth set of base molds 28 relates to a single intersection and the twentieth set of base molds 29 relates to two immediately adjacent intersections.

Fig. 30 shows a twentieth set of base modes 30 for an intersection guidance view 200 according to the present invention, which are suitable for use at roundabout intersections.

Fig. 31 shows a twenty-second set of base molds 31 for an intersection guidance view 200 according to the present invention, which relate to public transportation lanes. In addition, the bus lane may be displayed in any other base model.

Fig. 32, 33 and 34 show a twenty-third, a twenty-fourth and a twenty-fifth set of

base molds

32, 33, 34 according to the invention for a crossing guide view 200, which base molds relate to a lane-splicing (car pool lane).

Fig. 35, 36 and 37 show a twenty-sixth set of base molds 35, a twenty-seventh set of base molds 36 and a twenty-eighth set of base molds 37 for an intersection guidance view 200 according to the present invention, which relate to a toll booth or an ETC.

Then, in step S124, once the user is close enough to the first intersection in the intersection guide view 200, the user position icon 80 representing the real-time position of the user is displayed in the intersection guide view 200, wherein the user position icon 80 moves correspondingly in the intersection guide view 200 as the user travels. If the user's lane-level location information can be obtained, for example, by means of the locating device 40, the user location icon 80 can be moved along the center line of the lane in which the user is located. If the user's lane-level location information cannot be obtained, the user location icon 80 may be moved along the center line of those recommended lanes. In this case, if the number of recommended lanes is an even number, the user position icon 80 may move on the lane dividing line located at the center of these recommended lanes, as shown in fig. 8.

According to an example, the user location icon 80 may be displayed later than the intersection guidance view 200 or both.

According to an example, the user position icon 80 is designed to indicate a direction, for example, as a triangle. Additionally or alternatively, user position icon 80 has a highlighted visual characteristic, e.g., has a highlighted color scheme (such as red) and/or a dynamic visual effect.

According to an advantageous embodiment of the invention, the path polygon 70 has a varying transparency distribution as the user position icon 80 moves. For example, the portion of the path polygon 70 that is in front of the user position icon 80 in the path extending direction may always be less transparent than the portion thereof that is behind the user position icon 80 in the path extending direction, and even the portion that is behind the user position icon 80 may be made completely transparent.

Fig. 38 shows a twenty-ninth set of base molds 38 for an intersection guidance view 200, which are capable of displaying a change in a recommended lane, in accordance with the present invention. When the user is farther from the intersection, since the

current sections

91, 92, and 93 of the three lanes can all lead to the target branch 99, the

current sections

91, 92, and 93 of the three lanes are all highlighted, and further, only the middle lane section 95 of the

sections

94, 95, and 96 of the three lanes immediately adjacent to the bifurcation intersection can lead to the target branch 99, and thus, only the middle lane section 95 is highlighted, as shown in fig. 38A. Illustratively, the highlighting of the

current sections

91, 92 and 93 is higher than the highlighting of the center lane section 95. As the user continues to travel toward the intersection, the user location icon 80 appears in the intersection guide view 200, as shown in fig. 38B. When the user enters the center lane section 95, the highlighting of

sections

91, 92 and 93 diminishes or disappears, while the highlighting of the center lane section 95 increases, as shown in FIG. 38C.

Fig. 39 shows a thirtieth set of base molds 39 for an intersection guidance view 200 according to the present invention, wherein the base molds relate to two sufficiently adjacent intersections. Specifically, when the intersection shown at the upper left of fig. 39 is sufficiently adjacent to the intersection shown at the upper right of fig. 39, two successive intersections are simultaneously shown in one intersection guide view 200 using the thirtieth group of base molds 39 shown at the lower side of fig. 39.

Finally, in step S130, when the user has passed through the intersection, the display of the intersection guidance view 200 is ended.

Further, the intersection guide view 200 according to the present invention may be adapted to accommodate different display devices. Illustratively, the intersection guide view 200 suitable for use with a display device at a center screen or dashboard may have a configuration as shown in fig. 5-6. In particular, when the intersection guidance view 200 is displayed by means of the center control screen, it may be displayed superimposed as a pop-up enlarged screen on at least a portion of the navigation map 300, for example, a corner of the navigation map 300, as shown in fig. 8. In this case, additionally, a simplified intersection direction indication 400 may be displayed below the intersection guide view 200 and the type of the next intersection and the distance to the next intersection may be displayed by means of the text & icon 500 in the intersection guide view 200. Illustratively, the intersection guidance view 200 may pop up when the user is below a preset threshold from the intersection.

The intersection guide view 200' suitable for heads-up displays may have a higher contrast and a greater degree of simplification than the intersection guide view 200 suitable for display devices at the center screen or dashboard, as shown in fig. 7. Alternatively, the intersection guidance view 200' may also have other additional indication information, such as the current speed limit, the current vehicle speed, a speed bump indication, a recommended turn, time, remaining distance to the destination, and distance to the intersection.

The intersection guidance view according to the present invention is designed as a dynamic animated perspective view, which is intended to display only relevant information that a user needs to pay attention to in order to pass through an intersection, and is capable of displaying precise lane and lane connection information of the intersection and a real-time position of the user when passing through the intersection, thereby enabling the user to acquire useful indication information for passing through the intersection with only a short glance.

The intersection guidance method according to the present invention can be programmed not only in a vehicle, but also in other smart devices, such as a cell phone, for example, incorporated in a map and navigation application for a cell phone.

Although some embodiments have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the invention. The appended claims and their equivalents are intended to cover all such modifications, substitutions and changes as fall within the true scope and spirit of the invention.

Claims

1. An intersection guidance method (100), comprising: generating an intersection guidance view (200, 200', 200 ") displayable by means of a display device (30) when the user is approaching an intersection, the intersection guidance view comprising a static road representation (60) depicting roads connected to the intersection, a path representation (70) indicating recommended paths for reaching and passing through the intersection, and a dynamic user position icon (80) for displaying the real-time position of the user; wherein, in a case where three immediately adjacent intersections are to be successively passed through in order to reach the destination, when the user is approaching a first intersection of the three immediately adjacent intersections, a first intersection guidance view for guiding through the first intersection and a second intersection of the three immediately adjacent intersections located downstream of the first intersection is generated, and once the user passes through the first intersection, the first intersection guidance view is switched to a second intersection guidance view for guiding through the second intersection and a third intersection of the three immediately adjacent intersections located downstream of the second intersection.

2. The intersection guidance method (100) according to claim 1,

the road representation (60) is in the form of a polygonal mesh, wherein mesh parts of the polygonal mesh representing road sections are assigned different weights, so that the mesh parts are not drawn exactly to scale.

3. The intersection guidance method (100) according to claim 2,

a path diagram (70) is added as a path polygon above a polygon representing the recommended lane in the polygon mesh, wherein the path polygon has a higher visual characteristic than the polygon mesh.

4. The intersection guidance method (100) according to claim 3,

the path polygon is configured such that its transparency profile changes as the user position moves.

5. The intersection guidance method (100) according to any one of the preceding claims,

the user location icon (80) is configured to move in the intersection guide view (200, 200', 200 ") as the user location moves.

6. The intersection guidance method (100) according to claim 5,

the path polygon is configured to: during the movement of the user position icon (80), the transparency of the part of the user position icon (80) in front of the user position icon in the path extending direction is always lower than that of the part of the user position icon (80) in back of the user position icon.

7. The intersection guidance method (100) according to claim 5 or 6,

if the user's lane-level location information cannot be obtained, the user location icon (80) is caused to move along the center line of the recommended lanes, for example, on the lane-dividing lines located at the centers of these recommended lanes.

8. The intersection guidance method (100) according to any one of the preceding claims,

the polygon mesh is naturally faded out in the intersection guidance view by setting UV texture coordinates of the polygon mesh, wherein the path polygon has a different UV texture design than the polygon mesh.

9. The intersection guidance method (100) according to any one of the preceding claims,

when two successive intersections are sufficiently close, consecutive road representations (60) and path representations (70) of the two intersections are shown in the same intersection guidance view (200, 200', 200 ").

10. Intersection guiding device (1) comprising a processor (50) and a computer readable storage medium (20) communicatively connected to the processor (50), the computer readable storage medium having stored therein computer instructions which, when executed by the processor (50), implement the steps of the intersection guiding method according to any of the preceding claims.