3D Landmark Road Traffic Area Identification
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Solution Overview
Problem
Navigation systems cannot incorporate 3-dimensional landmarks into route guidance information if they are part of the driving route, as the database lacks information on which part of the landmark is used for driving.
Innovation Solution
A method to identify and store the largest continuous horizontal surface of a 3-dimensional landmark as a road traffic area, allowing it to be integrated into 3-dimensional route guidance, by comparing normal vectors and marking it with a predefined texture for display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If 3-dimensional landmarks are displayed in route guidance information, then the navigation experience is improved, but the system cannot correctly identify which part of the landmark is used for driving
Solution Approach 1:
The patent segments the 3-dimensional landmark into multiple faces with associated normal vectors, allowing the system to distinguish different surfaces. By analyzing the orientation of normal vectors, the system identifies which faces correspond to horizontal road surfaces versus vertical structures, enabling precise separation of the road traffic area from the rest of the landmark.
Solution Approach 2:
The patent introduces the dimension of normal vector orientation to differentiate between horizontal and vertical surfaces of the landmark. By examining the angular orientation of normal vectors in 3D space, the system can identify which surfaces are horizontal (road traffic areas) and which are vertical, adding a new discriminative dimension to the landmark analysis.
2Manufacturing precision
If the database contains complete 3-dimensional landmark data, then the representation accuracy is improved, but the lack of driving surface information prevents route integration
Solution Approach 1:
The patent performs preliminary analysis of the 3-dimensional landmark data by pre-calculating normal vectors for all faces and pre-identifying horizontal surfaces. This preliminary processing allows the system to prepare the landmark data in advance, marking which surfaces are road traffic areas before the routing process, thus preventing information loss during route integration.
Solution Approach 2:
The patent extracts the essential information about driving surfaces from the complete 3-dimensional landmark data by identifying and isolating horizontal faces based on normal vector orientation. This extraction separates the relevant road traffic area information from the rest of the landmark geometry, making it available for route guidance while preserving the complete landmark representation.
3Ease of manufacture
If 3-dimensional landmarks are integrated into route guidance, then the display realism is improved, but the complexity of processing and identifying road areas increases
Solution Approach 1:
The patent changes the parameter of surface orientation by analyzing normal vector angles to distinguish horizontal from vertical surfaces. By using angular thresholds and orientation parameters, the system can automatically identify road traffic areas without complex processing, maintaining display realism while keeping the algorithm simple and efficient.
Data Source
AI summary
A system and method for processing a 3-dimensional landmark providing a 3-dimensional representation of a 3-dimensional real world object located at a predefined geographic location is provided. The method includes the steps of providing a data set containing the 3-dimensional landmark, determining a largest continuous horizontal surface of the 3-dimensional landmark, and storing the determined largest horizontal surface as road traffic area of a road network used by a user when moving on the object.