Road Division Line Judgment on Curved Roads Using Adaptive Range
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Solution Overview
Problem
Existing autonomous driving technologies face challenges in accurately recognizing road division lines from camera images when vehicles are on curved roads, leading to misrecognition and degraded recognition accuracy due to excessive restraint on detection ranges.
Innovation Solution
A judgment device and method that adjusts the recognition range of camera road division lines based on the gradient and curving degree of the road, setting a shorter judgment range when the vehicle is on a curved road by identifying specific far end points relative to the vehicle position, ensuring consistency with map road division lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the judgment range is extended to improve road division line recognition coverage, then more road sections can be recognized, but recognition accuracy degrades on curved roads due to misrecognition
Solution Approach 1:
The patent dynamically adjusts the judgment range distance based on road curvature. When the vehicle is on a curved road, the processor shortens the distance to the far end part of the judgment range compared to when on a straight road. This dynamic adjustment prevents misrecognition on curved roads while maintaining adequate coverage on straight roads, resolving the contradiction between coverage area and recognition accuracy.
2Measurement precision
If the judgment range is shortened to improve recognition accuracy on curved roads, then misrecognition is reduced, but the coverage of detectable road sections is limited
Solution Approach 1:
The patent applies different judgment range distances based on local road conditions. Instead of using a uniform judgment range, the system identifies whether the vehicle is on a curved road or straight road and applies appropriate distance settings locally. This allows the system to maintain short judgment ranges on curved roads for accuracy while using longer ranges on straight roads for coverage, resolving the contradiction through spatially differentiated parameters.
3Reliability
If excessive restraint is applied to detection range to prevent misrecognition, then false positives are reduced, but recognition accuracy of road division line is degraded
Solution Approach 1:
The patent changes the judgment range distance parameter based on road curvature conditions. By adjusting this key parameter dynamically, the system optimizes the balance between reliability and recognition accuracy. The processor sets the distance to the far end part of the judgment range to be shorter on curved roads, preventing misrecognition while maintaining adequate detection capability, thus resolving the contradiction through parameter optimization.
Data Source
AI summary
A judgment device includes a storage medium storing computer readable commands, and a processor connected to the storage medium. The processor executes the computer readable commands to recognize a road division line present in a proceeding direction of a vehicle, and to judge whether or not the recognized road division line is consistent with a map road division line based on map information stored in a storage unit. When the vehicle is traveling on a curved road, the processor sets a distance from the vehicle to a far end part on a side in the proceeding direction of the vehicle of a judgment range in which the judgment is performed to be shorter than the distance when the vehicle is not traveling on a curved road.