Editable Digital Model Construction Method for Road Traffic Signs

Abstract

This invention discloses a method for constructing editable digital models of road traffic signs. The method includes acquiring drawings, constructing traffic sign models, applying texture mapping and color rendering to the models, building a database, storing traffic sign model data, editing and saving the traffic sign models, and storing road traffic scenes. By distinguishing between editable and non-editable content in the road traffic sign design drawings and determining the editable content on the sign surface of the traffic sign model, the editable characteristics of road traffic signs are realized. This provides methodological support for adding, removing, replacing, and storing traffic signs in digital road traffic scenes. Building a component-based traffic sign model library facilitates the development and storage of commonly used traffic sign models for different roads, thereby simplifying the generation of traffic signs in digital road traffic scenes. This method can provide technical support for research on the impact of traffic signs on road traffic flow in real-world scenarios and for optimizing traffic sign settings.

Description

Technical Field

[0001] This invention relates to a method for constructing editable digital models of road traffic signs. Background Technology

[0002] The digitization of physical entities is the first step in realizing the digitalization of the physical world and the digital world driving the physical world, and road traffic signs are an indispensable component of road infrastructure. Therefore, constructing editable digital models of road traffic signs is of great significance for developing digital and intelligent road traffic systems.

[0003] Currently, mainstream modeling technologies mainly include geometric modeling, 3D scanning modeling, and digital image modeling. All of these technologies can be used to construct digital models of road traffic signs that closely approximate reality; however, they lack editability, are static and uncopyable, and cannot support the digital traffic world's ability to drive the physical world.

[0004] Therefore, developing a model construction method that enables digital models of road traffic signs to be editable, reproducible, and interactive is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] The purpose of this invention is to provide a method for constructing an editable digital model of road traffic signs, in order to solve the problem that existing digital models of road traffic signs are not editable, are static, and cannot be copied.

[0006] To address the aforementioned technical problems, this invention provides a method for constructing an editable digital model of road traffic signs, comprising the following steps:

[0007] S1: Collect drawings: Collect traffic sign design drawings for roads of all levels, distinguish between general and special signs in the road traffic sign design drawings, and distinguish between editable and non-editable content of general signs.

[0008] S2: Construct traffic sign models: Based on the parameters on the collected road traffic sign design drawings, construct models of various sign panels and posts, determine the symbols and editable content on the sign panels, and reserve editing spaces for the editable content according to the size of the symbols to form traffic sign models;

[0009] S3: Model Material Mapping and Color Rendering: Based on the traffic sign design drawings, perform material mapping and color rendering on various traffic sign models;

[0010] S4: Database Setup: Build a component-based traffic sign model library, and classify and collect the digital layout models and pole models of various types of traffic signs under different road levels according to the menu settings.

[0011] S5: Traffic sign model data storage: Based on the characteristics of the traffic sign model library, design data files to persistently store the traffic sign model data locally;

[0012] S6: Editing and saving traffic sign model layout information: Edit the editable content of the road traffic sign model according to the design requirements, place the generated road traffic sign model to the designated location through the interface operation, and save the layout information of the traffic sign.

[0013] S7: Road traffic scene storage: Edit and generate road traffic signs in the scene, save the edited scene in the form of a local data file, and read and visualize the data of the edited scene by loading the scene data file.

[0014] Furthermore, the road traffic sign design drawings include the sign layout design drawings and the pillar design drawings; the sign layout design drawings include the size, color, shape, font, and height of the sign, and the pillar design drawings include the size and type of the pillar.

[0015] Furthermore, step S2 specifically includes:

[0016] Construct a 3D model of the sign layout based on the size and shape parameters of the sign layout in the road traffic sign design drawings;

[0017] Create a 3D model of the column based on the size and type parameters of the column in the road traffic sign design drawings;

[0018] The symbols on the signboard are determined based on the font, size, and editable content of the symbols on the road traffic sign design drawings. At the same time, spaces are reserved for editing the editable content according to the size of the symbols; thus forming a traffic sign model.

[0019] Furthermore, the material mapping for various traffic sign models specifically includes:

[0020] Use the physics material editor to create physical materials for the signboard and pillars, simulating the application of real-world materials to texture the signboard and pillar models.

[0021] Furthermore, the color rendering of various traffic sign models specifically includes:

[0022] Based on the colors of the traffic sign layout, text, and patterns in the traffic sign design drawings, and in accordance with the chromaticity coordinates and luminance factors of the daytime and nighttime colors of reflective film specified in the "Road Traffic Reflective Film" (GB / T 18833-2012) standard, the colors are rendered.

[0023] Furthermore, when rendering the colors of various traffic sign models, the sign face should be rendered in at least three colors, including those in the traffic sign design drawings.

[0024] Furthermore, the menu categories for the component-based traffic sign model library in step S4 include:

[0025] The first-level menu corresponds to road types, which include highways and urban roads;

[0026] The secondary menu corresponds to road classification, which includes urban expressways, urban roads of the same classification as urban expressways, highways, and roads of the same classification as highways.

[0027] The three-level menu corresponds to the road design speed;

[0028] The four levels of menus correspond to the following sign types: prohibition signs, instruction signs, warning signs, directional signs, notice signs, auxiliary signs, and posts.

[0029] Furthermore, the data features of the traffic sign model library in step S5 include:

[0030] The categories of road traffic signs include prohibitory signs, instruction signs, warning signs, guide signs, notice signs, auxiliary signs, and posts;

[0031] The loading path for road traffic signs includes: the path where the digital model file is located;

[0032] The location and orientation of road traffic signs include: three-dimensional coordinates relative to digital space;

[0033] Real-time status of road traffic signs, including displayed text.

[0034] Furthermore, the component-based editing of the editable content of the road traffic sign model specifically includes: editing the sign model attributes, that is, through the interface editing operation, selecting the required layout and pillars, determining the sign color according to the customization option box, and setting the graphic and text display content of the layout according to the editable text box; editing the sign placement orientation, that is, using the mouse to drag the sign to the specified coordinate position, or directly entering the sign position coordinates in the editing interface, the sign will be automatically positioned to the specified position, and then the X / Y / Z axes can be selected to adjust the sign direction.

[0035] The beneficial effects of this invention are as follows: by distinguishing between editable and non-editable content in road traffic sign design drawings, and determining the editable content on the sign panel of the traffic sign model, the editable characteristics of road traffic signs are realized, thereby providing methodological support for the addition, subtraction, replacement, and storage of traffic signs in digital road traffic scenarios; by building a component-based traffic sign model library, it is beneficial to realize the development and storage of commonly used traffic sign models for different roads, thereby facilitating the generation of traffic signs in digital road traffic scenarios. Attached Figure Description

[0036] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, use the same reference numerals to denote the same or similar parts. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0037] Figure 1 This is a flowchart of a method according to an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of a component-based editable road traffic sign system according to an embodiment of the present invention. Detailed Implementation

[0039] like Figure 1 The method for constructing an editable digital model of road traffic signs shown includes the following steps:

[0040] S1: Collect drawings: Collect traffic sign design drawings for roads of all levels, distinguish between general and special signs in the road traffic sign design drawings, and distinguish between editable and non-editable content of general signs.

[0041] S2: Construct traffic sign models: Based on the parameters on the collected road traffic sign design drawings, construct models of various sign panels and posts, determine the symbols and editable content on the sign panels, and reserve editing spaces for the editable content according to the size of the symbols to form traffic sign models;

[0042] S3: Model Material Mapping and Color Rendering: Based on the traffic sign design drawings, perform material mapping and color rendering on various traffic sign models;

[0043] S4: Database Setup: Build a component-based traffic sign model library, and classify and collect the digital layout models and pole models of various types of traffic signs under different road levels according to the menu settings.

[0044] S5: Traffic sign model data storage: Based on the characteristics of the traffic sign model library, design data files to persistently store the traffic sign model data locally;

[0045] S6: Editing and saving traffic sign model layout information: Edit the editable content of the road traffic sign model according to the design requirements, place the generated road traffic sign model to the designated location through the interface operation, and save the layout information of the traffic sign.

[0046] S7: Road traffic scene storage: Edit and generate road traffic signs in the scene, save the edited scene in the form of a local data file, and read and visualize the data of the edited scene by loading the scene data file.

[0047] The following is a detailed description of each of the above steps:

[0048] According to one embodiment of this application, in step S1 above, the traffic sign design drawings are CAD drawings of commonly used traffic signs corresponding to various types and levels of roads; the road traffic sign design drawings include the sign panel design drawings and the post design drawings; the sign panel design drawings should indicate the size, color, shape, font, and height of the sign panel, and the post design drawings should indicate the size and type of the post.

[0049] According to one embodiment of this application, step S2 specifically includes:

[0050] Construct a 3D model of the sign layout based on the size and shape parameters of the sign layout in the road traffic sign design drawings;

[0051] Create a 3D model of the column based on the size and type parameters of the column in the road traffic sign design drawings;

[0052] The symbols on the signboard are determined based on the font, size, and editable content of the symbols on the road traffic sign design drawings. Editable spaces are reserved for the editable content according to the symbol size; thus forming a traffic sign model. Among them, special signs are all non-editable by default; general signs distinguish between non-editable and editable parts.

[0053] The above steps for building traffic sign models can be completed in MAX software.

[0054] According to one embodiment of this application, step S3 above, which involves applying material mapping to various traffic sign models, specifically includes:

[0055] Use the physics material editor to create physical materials for the signboard and pillars, simulating the application of real-world materials to texture the signboard and pillar models.

[0056] The above material mapping steps can be completed by exporting the 3D model of the logo and the 3D model of the pillars from MAX to obj or fbx format, and then importing the exported files into software such as Unity, UE or SketchUp.

[0057] According to one embodiment of this application, step S3 above, which involves color rendering of various traffic sign models, specifically includes:

[0058] Based on the colors of the traffic sign layout, text, and patterns in the traffic sign design drawings, and in accordance with the chromaticity coordinates and luminance factors of the daytime and nighttime colors of reflective film specified in the "Road Traffic Reflective Film" (GB / T 18833-2012) standard, the colors are rendered.

[0059] The above color rendering steps can be completed in software such as Unity, UE, or SketchUp.

[0060] According to one embodiment of this application, when rendering the colors of various traffic sign models, at least three colors, including those in the traffic sign design drawings, are rendered according to research needs and in accordance with standard specifications, so that the sign colors can be edited subsequently.

[0061] According to one embodiment of this application, in step S4 above, the menu categories of the component-based traffic sign model library include:

[0062] The first-level menu corresponds to road types, which include highways and urban roads;

[0063] The secondary menu corresponds to road classification, which includes urban expressways, urban roads of the same classification as urban expressways, highways, and roads of the same classification as highways.

[0064] The three-level menu corresponds to the road design speed;

[0065] The four-level menu corresponds to the sign types, including prohibition signs, instruction signs, warning signs, directional signs, notice signs, auxiliary signs, and posts (all 3D models of posts are collected into this "post").

[0066] According to one embodiment of this application, in step S5 above, the traffic sign model library data features include:

[0067] The categories of road traffic signs include prohibitory signs, instruction signs, warning signs, guide signs, notice signs, auxiliary signs, and posts;

[0068] The loading path for road traffic signs includes: the path where the digital model file is located;

[0069] The location and orientation of road traffic signs include: three-dimensional coordinates relative to digital space;

[0070] Real-time status of road traffic signs, including displayed text.

[0071] According to one embodiment of this application, the component-based editing of the editable content of the road traffic sign model in step S6 specifically includes: editing the sign model attributes, that is, through interface editing operations, selecting the required layout and pillars, determining the sign color according to the customized option box, and setting the layout graphic and text display content according to the editable text box; editing the sign placement orientation, that is, using the mouse to drag the sign to the specified coordinate position, or directly inputting the sign position coordinates in the editing interface, the sign will be automatically positioned to the specified position, and then the X / Y / Z axes are selected to adjust the sign direction.

[0072] According to one embodiment of this application, in step S6 above, the real-time data of the edited and generated road traffic sign model is obtained through API interfaces such as the built-in functions GetActorLocation and GetActorRotation; after obtaining the real-time data of the edited and generated road traffic sign model, it is written into an XML data file and saved locally.

[0073] This invention can be applied to the construction of digital models of traffic signs for highways and urban roads. By building a component-based digital model library of traffic signs, it enables the development and storage of commonly used traffic sign models for highways and urban roads of various levels, thereby facilitating the generation of traffic signs in digital road traffic scenarios. Furthermore, by setting an editable interface for attributes such as the position, direction, color, display content, and column type of each sign, it realizes the editability of road traffic signs, thus providing methodological support for the addition, deletion, replacement, and storage of traffic signs in digital road traffic scenarios. Ultimately, it provides technical support for the study of the impact of traffic signs on road traffic flow in real-world scenarios and the optimization of traffic sign settings.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for constructing an editable digital model of road traffic signs, characterized in that, Including the following steps: S1: Collect drawings: Collect traffic sign design drawings for roads of all levels, distinguish between general and special signs in the road traffic sign design drawings, and distinguish between editable and non-editable content of general signs. S2: Construct traffic sign models: Based on the parameters on the collected road traffic sign design drawings, construct models of various sign panels and posts, determine the symbols and editable content on the sign panels, and reserve editing spaces for the editable content according to the size of the symbols to form traffic sign models; S3: Model Material Mapping and Color Rendering: Based on the traffic sign design drawings, perform material mapping and color rendering on various traffic sign models; S4: Database Setup: Build a component-based traffic sign model library, and classify and collect the digital layout models and pole models of various types of traffic signs under different road levels according to the menu settings. S5: Traffic sign model data storage: Based on the characteristics of the traffic sign model library, design data files to persistently store the traffic sign model data locally; S6: Editing and saving traffic sign model layout information: Edit the editable content of the road traffic sign model according to the design requirements, place the generated road traffic sign model to the designated location through the interface operation, and save the layout information of the traffic sign. S7: Road traffic scene storage: Edit and generate road traffic signs in the scene, save the edited scene in the form of a local data file, and read and visualize the data of the edited scene by loading the scene data file.

2. The method for constructing an editable digital model of road traffic signs according to claim 1, characterized in that, The road traffic sign design drawings include the sign layout design drawings and the pillar design drawings; the sign layout design drawings include the size, color, shape, font, and height of the sign, and the pillar design drawings include the size and type of the pillar.

3. The method for constructing an editable digital model of road traffic signs according to claim 1, characterized in that, Step S2 specifically includes: Construct a 3D model of the sign layout based on the size and shape parameters of the sign layout in the road traffic sign design drawings; Create a 3D model of the column based on the size and type parameters of the column in the road traffic sign design drawings; The symbols on the signboard are determined based on the font, size, and editable content of the symbols on the road traffic sign design drawings. At the same time, spaces are reserved for editing the editable content according to the size of the symbols; thus forming a traffic sign model.

4. The method for constructing an editable digital model of road traffic signs according to claim 1, characterized in that, The specific steps of applying texture mapping to various traffic sign models include: Use the physics material editor to create physical materials for the signboard and pillars, simulating the application of real-world materials to texture the signboard and pillar models.

5. The method for constructing an editable digital model of road traffic signs according to claim 4, characterized in that, When rendering various traffic sign models with colors, the sign surface should be rendered in at least three colors, including those shown in the traffic sign design drawings.

6. The method for constructing an editable digital model of road traffic signs according to claim 1, characterized in that, The menu categories of the component-based traffic sign model library mentioned in step S4 include: The first-level menu corresponds to road types, which include highways and urban roads; The secondary menu corresponds to road levels, which include urban expressways, urban roads of the same level as urban expressways, highways, and roads of the same level as highways. The three-level menu corresponds to the road design speed; The four-level menu corresponds to the sign types, which include prohibition signs, instruction signs, warning signs, directional signs, notice signs, auxiliary signs, and posts.

7. The method for constructing an editable digital model of road traffic signs according to claim 1, characterized in that, The traffic sign model library data features mentioned in step S5 include: The categories of road traffic signs include prohibitory signs, instruction signs, warning signs, guide signs, notice signs, auxiliary signs, and posts; The loading path for road traffic signs includes: the path where the digital model file is located; The location and orientation of road traffic signs include: three-dimensional coordinates relative to digital space; Real-time status of road traffic signs, including displayed text.

8. The method for constructing an editable digital model of road traffic signs according to claim 1, characterized in that, Editing the editable content of the road traffic sign model specifically includes: editing the sign model attributes, that is, through the interface editing operation, selecting the required layout and pillars, determining the sign color according to the customization option box, and setting the graphic and text display content of the layout according to the editable text box; editing the sign placement orientation, that is, using the mouse to drag the sign to the specified coordinate position, or directly entering the sign position coordinates in the editing interface, the sign will be automatically positioned to the specified position, and then the X / Y / Z axis can be selected to adjust the sign direction.

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