CN116246047A - Method for constructing editable road traffic sign digital model - Google Patents

Abstract

The invention discloses an editable road traffic sign digital model construction method, which comprises the steps of collecting drawings, constructing a traffic sign model, attaching a model material map, rendering colors, constructing a database, storing traffic sign model data, editing and storing the traffic sign model and storing road traffic scenes; the editable content of the road traffic sign design drawing is distinguished from the non-editable content, and the editable content is determined on the sign layout of the traffic sign model, so that the editable characteristic of the road traffic sign is realized, and a method support is provided for increasing, decreasing, replacing and storing the traffic sign in the road traffic digital scene; the building of the assembly type traffic sign model library is beneficial to the development and storage of common traffic sign models of different roads, and then the generation of traffic signs in the road traffic digital scene is facilitated. The method can provide technical support for the research on the influence of the traffic sign on the road traffic flow operation in the real scene and the optimization of the traffic sign setting.

Description

Construction method of digital model of editable road traffic signs

technical field

The invention relates to a method for constructing an editable digital model of a road traffic sign.

Background technique

The digitization of physical entities is the first step to realize the digitization of the physical world and the digital world to drive the physical world, and road traffic signs are an indispensable component of road infrastructure. Therefore, building an editable digital model of road traffic signs is of great significance for the development of digital and intelligent road traffic systems.

At present, the mainstream modeling technology mainly includes modeling technology based on geometric modeling, modeling technology based on 3D scanning and modeling technology based on digital image. The above-mentioned technologies can be used to construct a digital model of road traffic signs that is close to reality; however, it is not editable, static, and non-replicable, and cannot support the problem that the digital traffic world drives the physical world.

Therefore, in view of the above problems, it is a technical problem to be solved urgently to develop a model construction method that makes the digital model of road traffic signs editable, reproducible and interactive.

Contents of the invention

The purpose of the present invention is to provide a method for constructing an editable digital model of road traffic signs to solve the problem that the existing digital models of road traffic signs are not editable, static and non-replicable.

In order to solve the above-mentioned technical problems, the present invention provides a method for constructing an editable road traffic sign digital model, comprising steps:

S1: Collect drawings: collect traffic sign design drawings of roads of all levels, distinguish between general signs and special signs in road traffic sign design drawings, and distinguish between editable content and non-editable content of general signs;

S2: Construct traffic sign model: According to the parameters on the collected road traffic sign design drawings, construct models of various sign layouts and columns respectively, determine the markers and editable content on the sign layout, and edit the editable content according to Editing space is reserved for the size of the sign to form a traffic sign model;

S3: Model material mapping and color rendering: perform material mapping and color rendering on various traffic sign models according to the traffic sign design drawings;

S4: Building a database: building a component traffic sign model library, and classifying and collecting digital layout models and rod models of various types of traffic signs under roads of all levels according to menu settings;

S5: Traffic sign model data storage: According to the data characteristics of the traffic sign model database, design the data file, and store the traffic sign model data locally;

S6: Traffic sign model editing and layout information preservation: According to the design requirements, edit the editable content of the road traffic sign model, arrange the road traffic sign model generated by editing to the designated position through the interface operation, and save the layout information of the traffic sign to save;

S7: Road traffic scene storage: Edit and generate road traffic signs in the scene, save the edited scene through local data files, and read and visualize the data of the edited scene by loading the scene data file.

Further, the road traffic sign design drawing includes the sign layout design drawing and column design drawing of the traffic sign; the sign layout design drawing includes the size, color, shape, text font, and character height of the sign layout, and the column design drawing includes the size and type of the column .

Further, step S2 specifically includes:

Construct a 3D model of the sign layout according to the size parameters and shape parameters of the sign layout on the road traffic sign design drawings;

Establish a column 3D model according to the size parameters and type parameters of the column on the road traffic sign design drawing;

Determine the markers on the sign layout according to the font, size and editable content of the markers on the road traffic sign design drawings, and reserve spaces for editing and decoding the editable content according to the size of the markers; form a traffic sign model.

Further, the material mapping for various traffic sign models specifically includes:

Use the physical material editor to write the physical materials of the logo layout and columns, and simulate the materials in the real world to map the logo layout and column models.

Further, the color rendering of various traffic sign models specifically includes:

According to the color of the traffic sign layout, text and pattern in the traffic sign design drawings, according to the chromaticity coordinates and brightness factors of the daytime color and nighttime color of the reflective film specified in the "Road Traffic Reflective Film" (GB/T 18833-2012) , for color rendering.

Further, when performing color rendering on various types of traffic sign models, at least the sign layouts are rendered in three colors including those in the traffic sign design drawings.

Further, the menu classification of the component traffic sign model library in step S4 includes:

The first-level menu corresponds to the road type, and the road type includes highways and urban roads;

The second-level menu corresponds to the road level, and the road level includes urban expressways, urban roads of the same level as urban expressways, expressways, and highways of the same level as expressways;

The third-level menu corresponds to the road design speed;

The four-level menu corresponds to the type of signs, including prohibition signs, instruction signs, warning signs, guide signs, notice signs, auxiliary signs and columns.

Further, the data characteristics of the traffic sign model library in step S5 include:

The category of road traffic signs, including prohibition signs, instruction signs, warning signs, guide signs, notice signs, auxiliary signs and pillars;

The loading path of the road traffic sign, including: the path where the digital model file is located;

The location and orientation of road traffic signs, including: three-dimensional coordinates relative to the digital space;

Real-time status of road traffic signs, including: display text.

Further, the component-based editing of the editable content of the road traffic sign model specifically includes: sign model attribute editing, that is, through the interface editing operation, select the required layout and column, determine the sign color according to the customized option box, and edit according to the editable The text box sets the display content of the layout graphic; the layout of the logo is edited, that is, use the mouse to drag the logo to the specified coordinate position, or directly input the coordinates of the logo position on the editing interface, the logo will be automatically positioned at the specified position, and then select X respectively after positioning /Y/Z axis adjusts the direction of the logo.

The beneficial effect of the present invention is: by distinguishing the editable content and the non-editable content of the road traffic sign design drawing, and determining the editable content on the sign layout of the traffic sign model, the editable characteristic of the road traffic sign is realized, thereby providing The increase, decrease, replacement, and storage of traffic signs in the road traffic digital scene provide method support; building a component traffic sign model library can facilitate the development and storage of common traffic sign models for different roads, and then facilitate traffic in the road traffic digital scene Generation of the logo.

Description of drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. In these drawings, the same reference numerals are used to indicate the same or similar parts. The illustrative embodiments of the application and their descriptions are used The purpose of explaining this application does not constitute an improper limitation of this application. In the attached picture:

Fig. 1 is the method flowchart of an embodiment of the present invention;

Fig. 2 is a schematic diagram of a component editable road traffic sign system according to an embodiment of the present invention.

Detailed ways

The editable road traffic sign digital model construction method as shown in Figure 1, the method comprises the following steps:

S1: Collect drawings: collect traffic sign design drawings of roads of all levels, distinguish between general signs and special signs in road traffic sign design drawings, and distinguish between editable content and non-editable content of general signs;

S2: Construct traffic sign model: According to the parameters on the collected road traffic sign design drawings, construct models of various sign layouts and columns respectively, determine the markers and editable content on the sign layout, and edit the editable content according to Editing space is reserved for the size of the sign to form a traffic sign model;

S3: Model material mapping and color rendering: perform material mapping and color rendering on various traffic sign models according to the traffic sign design drawings;

S4: Building a database: building a component traffic sign model library, and classifying and collecting digital layout models and rod models of various types of traffic signs under roads of all levels according to menu settings;

S5: Traffic sign model data storage: According to the data characteristics of the traffic sign model database, design the data file, and store the traffic sign model data locally;

S6: Traffic sign model editing and layout information preservation: According to the design requirements, edit the editable content of the road traffic sign model, arrange the road traffic sign model generated by editing to the designated position through the interface operation, and save the layout information of the traffic sign to save;

S7: Road traffic scene storage: Edit and generate road traffic signs in the scene, save the edited scene through local data files, and read and visualize the data of the edited scene by loading the scene data file.

Each of the above steps is described in detail below:

According to one embodiment of the present application, in the above step S1, the traffic sign design drawing is a commonly used traffic sign design CAD drawing covering various types and grades of roads; the road traffic sign design drawing includes the sign layout design drawing and column design of the traffic sign Drawings; logo layout design drawings should indicate the size, color, shape, text font, and character height of the logo layout, and column design drawings should indicate the size and type of columns.

According to an embodiment of the present application, the above step S2 specifically includes:

Construct a 3D model of the sign layout according to the size parameters and shape parameters of the sign layout on the road traffic sign design drawings;

Establish a column 3D model according to the size parameters and type parameters of the column on the road traffic sign design drawing;

Determine the marker on the sign layout according to the font, size and editable content of the marker on the road traffic sign design drawing, and reserve editing spaces for the editable content according to the size of the marker; form a traffic sign model; among them, the special sign defaults All are non-editable; the generic flag distinguishes between non-editable and editable parts.

The above-mentioned traffic sign model construction steps can be completed in MAX software.

According to an embodiment of the present application, in the above step S3, performing material mapping on various types of traffic sign models specifically includes:

Use the physical material editor to write the physical materials of the logo layout and columns, and simulate the materials in the real world to map the logo layout and column models.

The above material mapping steps can be completed after exporting the 3D model of the logo layout and the 3D model of the column from MAX to obj or fbx format, and then import the exported files into software such as unity, UE or sketchup.

According to an embodiment of the present application, in the above step S3, performing color rendering on various types of traffic sign models specifically includes:

According to the color of the traffic sign layout, text and pattern in the traffic sign design drawings, according to the chromaticity coordinates and brightness factors of the daytime color and nighttime color of the reflective film specified in the "Road Traffic Reflective Film" (GB/T 18833-2012) , for color rendering.

The above color rendering steps can be completed in software such as unity, UE or sketchup.

According to an embodiment of the present application, when performing color rendering on various types of traffic sign models, according to research needs and in combination with the requirements of standard specifications, at least the sign layouts are rendered into three colors including those in the traffic sign design drawings ; to make the flag color editable later.

According to an embodiment of the present application, in the above step S4, the menu classification of the component traffic sign model library includes:

The first-level menu corresponds to the road type, and the road type includes highways and urban roads;

The second-level menu corresponds to the road level, and the road level includes urban expressways, urban roads of the same level as urban expressways, expressways, and highways of the same level as expressways;

The third-level menu corresponds to the road design speed;

The four-level menu corresponds to the type of signs, including prohibition signs, instruction signs, warning signs, guide signs, notice signs, auxiliary signs and columns (the 3D models of the columns are all collected in this "column").

According to an embodiment of the present application, in the above step S5, the data characteristics of the traffic sign model library include:

The category of road traffic signs, including prohibition signs, instruction signs, warning signs, guide signs, notice signs, auxiliary signs and pillars;

The loading path of the road traffic sign, including: the path where the digital model file is located;

The location and orientation of road traffic signs, including: three-dimensional coordinates relative to the digital space;

Real-time status of road traffic signs, including: display text.

According to an embodiment of the present application, in the above step S6, the component editing of the editable content of the road traffic sign model specifically includes: editing the sign model attributes, that is, selecting the required layout and column through the interface editing operation, and according to the customized The option box determines the color of the logo, and sets the graphic display content of the layout according to the editable text box; editing the layout of the logo, that is, using the mouse to drag the logo to the specified coordinate position, or directly input the coordinates of the logo position on the editing interface, and the logo will be automatically positioned To the specified position, after positioning, select the X/Y/Z axis to adjust the direction of the mark.

According to an embodiment of the present application, in the above step S6, obtaining the real-time data of the road traffic sign model generated by editing is realized through API interfaces such as built-in functions GetActorLocation and GetActorRotation; after obtaining the real-time data of the road traffic sign model generated by editing, Write XML data files and save them locally.

The present invention can be applied to the construction of traffic sign digital models of highways and urban roads. By building a component-type traffic sign digital model library, the development and storage of common traffic sign models of highways and urban roads at various levels can be realized, thereby facilitating traffic in road traffic digital scenes. The generation of signs; and by setting the editable interface of the position, direction, color, display content and column type of each sign, the editable characteristics of road traffic signs can be realized, so as to provide for the increase and decrease of traffic signs in the road traffic digital scene. Replacement and storage provide method support, and ultimately provide technical support for the research on the impact of traffic signs on road traffic flow in real scenes and the optimization of traffic sign settings.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (9)

1. The method for constructing the editable road traffic sign digital model is characterized by comprising the following steps of:

s1: collecting drawings: collecting traffic sign design drawings of roads of various grades, distinguishing a general sign and a special sign in the road traffic sign design drawings, and distinguishing editable content and non-editable content of the general sign;

s2: constructing a traffic sign model: respectively constructing models of various mark layouts and upright columns according to the acquired parameters on the road traffic mark design drawing, determining the marks and editable contents on the mark layouts, reserving editing spaces for the editable contents according to the sizes of the marks, and forming a traffic mark model;

s3: model texture mapping and color rendering: performing material mapping and color rendering on various traffic sign models according to the traffic sign design drawing;

s4: building a database: building an assembly type traffic sign model library, and classifying and collecting digital layout models and rod models of various types of traffic signs under roads of various grades according to menu setting;

s5: traffic sign model data storage: according to the data characteristics of the traffic sign model library, designing a data file, and carrying out local persistent storage on traffic sign model data;

s6: editing a traffic sign model and storing layout information: editing editable contents of the road traffic sign model according to design requirements, laying the edited road traffic sign model to a designated position through interface operation, and storing layout information of traffic signs;

s7: road traffic scene storage: and editing and generating road traffic marks in the scene, saving the edited scene in a local data file form, and reading and visually displaying the data of the edited scene by loading the scene data file.

2. The method for constructing the editable road traffic sign digital model according to claim 1, wherein the road traffic sign design drawing comprises a sign layout drawing of a traffic sign and a column design drawing; the design drawing of the mark layout comprises the size, the color, the shape, the character font and the character height of the mark layout, and the design drawing of the upright post comprises the size and the style of the upright post.

3. The method for constructing an editable road traffic sign digital model according to claim 1, wherein the step S2 specifically includes:

constructing a sign layout 3D model according to the size parameters and the shape parameters of the sign layout on the road traffic sign design drawing;

building a column 3D model according to the size parameters and the type parameters of the column on the road traffic sign design drawing;

determining the identifier on the mark layout according to the font and the size of the identifier on the road traffic mark design drawing and the editable content, and reserving a coding space for the editable content according to the size of the identifier; a traffic sign model is formed.

4. The method for constructing an editable road traffic sign digital model according to claim 1, wherein the material mapping for each type of traffic sign model specifically comprises:

and writing physical materials of the mark layout and the upright column by using a physical material editor, and simulating the materials in the real world to carry out material mapping on the mark layout and the upright column model.

5. The method for constructing the editable road traffic sign digital model according to claim 1, wherein the color rendering of each type of traffic sign model specifically comprises:

and (3) performing color rendering according to colors of traffic sign layouts, characters and patterns in a traffic sign design drawing and chromaticity coordinates and brightness factors of daytime colors and nighttime colors of the reflective film specified in the specification of the reflective film for road traffic (GB/T18833-2012).

6. The method for constructing an editable road traffic sign digital model according to claim 5, wherein at least sign layouts are respectively rendered into 3 colors including traffic sign design drawings when each type of traffic sign model is color-rendered.

7. The method of constructing an editable road traffic sign digital model according to claim 1, wherein the menu classification of the modular traffic sign model library in step S4 includes:

the first-level menu corresponds to road types, wherein the road types comprise roads and urban roads;

the second-level menu corresponds to road grades, wherein the road grades comprise urban expressways, urban roads with the same grade as the urban expressways, expressways and highways with the same grade as the expressways;

the three-level menu corresponds to the road design speed;

the four-level menu corresponds to the type of the mark, and comprises a forbidden mark, an indication mark, a warning mark, a road indicating mark, a notification mark, an auxiliary mark and a stand column.

8. The method for constructing an editable road traffic sign digital model according to claim 1, wherein the traffic sign model database data features in step S5 include:

the road traffic signs belong to categories including forbidden marks, indication marks, warning marks, road indicating marks, notification marks, auxiliary marks and upright posts;

a loading path for road traffic signs, comprising: the path of the digital model file;

a location fix for a road traffic sign, comprising: three-dimensional coordinates relative to the digital space;

a real-time status of a road traffic sign, comprising: and displaying the characters.

9. The method for constructing an editable road traffic sign digital model according to claim 1, wherein the performing component editing on editable contents of the road traffic sign model specifically comprises: selecting a required layout and upright columns through interface editing operation, determining the color of a mark according to a customized option frame, and setting the layout image-text display content according to an editable text frame; the mark layout azimuth editing, namely dragging the mark to a designated coordinate position by using a mouse, or directly inputting the position coordinates of the mark on an editing interface, automatically positioning the mark to the designated position, and respectively selecting X/Y/Z axis to adjust the mark direction after positioning.

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