Vehicle AR Route Guidance Using Point Cloud Position Correction
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Solution Overview
Problem
Existing vehicle navigation systems using GPS signals can experience errors in determining vehicle position, leading to inaccurate route guidance and potential termination of route guidance before reaching the destination, especially when augmented reality (AR) images are used for guidance.
Innovation Solution
The system determines a predicted position of the vehicle using point cloud map information when entering a predetermined range of the destination, compares this position with the position indicated by the GPS signal, and selects the more accurate position to guide the vehicle to the destination, enhancing route guidance accuracy in the last mile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GPS signal is used for vehicle positioning, then the system can provide route guidance information, but the position determination accuracy deteriorates leading to errors in vehicle position and AR image mapping
Solution Approach 1:
The patent introduces map matching technology as an intermediary between GPS positioning and route guidance. The system matches the GPS-obtained vehicle position with pre-stored map road network data to calculate a corrected position that conforms to actual road geometry, thereby eliminating GPS positioning errors and improving both reliability and measurement precision
Solution Approach 2:
The system implements a feedback mechanism where the corrected position obtained through map matching is continuously fed back to improve subsequent positioning accuracy. The corrected position information is used to adjust and optimize the route guidance and AR image mapping, creating a closed-loop system that progressively improves positioning reliability
2Ease of operation
If AR image is used for route guidance, then the user experience is enhanced, but the system becomes more sensitive to position determination errors causing AR image misalignment
Solution Approach 1:
Map matching serves as an intermediary correction layer between GPS positioning and AR image rendering. By correcting the position coordinates through map road network matching before passing them to the AR rendering system, the patent eliminates position errors that would otherwise cause AR image misalignment, thereby maintaining high usability without sacrificing positioning accuracy
3Measurement precision
If the vehicle position is corrected using map matching, then the position accuracy is improved, but the system complexity increases due to additional processing requirements
Solution Approach 1:
The patent implements map matching technology that serves multiple functions simultaneously: it corrects GPS positioning errors, validates whether the vehicle is on a valid road, provides feedback for route guidance optimization, and enables accurate AR image mapping. This multi-functionality reduces the need for separate correction systems, thereby limiting the increase in overall system complexity while achieving improved position accuracy
Data Source
AI summary
In an embodiment a vehicle includes a communication module, a display module, an image sensor configured to acquire a front image of the vehicle and a controller configured to determine that the vehicle enters a predetermined range of a destination based on a global positioning system (GPS) signal received through the communication module, compare a feature point of the front image of the vehicle with point cloud map information to determine a first predicted position of the vehicle, based on a difference between the first predicted position and a second predicted position of the vehicle indicated by the GPS signal, determine one of the first predicted position and the second predicted position as a position of the vehicle and control the display module to display an augmented reality (AR) image for performing a route guidance to the destination based on the determined position of the vehicle.