Demarcation Line Recognition Apparatus for Vehicle Lane Keeping
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Solution Overview
Problem
Low recognition accuracy of demarcation lines outside the image recognition range leads to decreased controllability in vehicle traveling control systems, as the estimated shape of demarcation lines deviates significantly from the actual shape, affecting the vehicle's ability to track leading vehicles and maintain lane position.
Innovation Solution
A demarcation line recognition apparatus that includes demarcation line recognizing, estimating, reliability determining, and estimation invalidating means, where the reliability level of recognized demarcation lines is assessed, and the estimation of shapes outside the image recognition range is invalidated when the reliability level is low, preventing the use of low-accuracy information for vehicle control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the shape of the traveling demarcation line outside the recognition range is estimated based on the recognized demarcation line, then the vehicle traveling control can utilize long-distance demarcation line information, but the estimation accuracy decreases when the recognition accuracy of the demarcation line is low
Solution Approach 1:
The system changes the parameter of estimation validity by introducing a reliability level parameter. When the recognition accuracy is low, the reliability level is set to invalid, which changes the state of the estimation parameter from valid to invalid, thereby preventing low-accuracy estimated information from being used in vehicle control
Solution Approach 2:
The system implements feedback by determining the reliability level of the recognized demarcation line and using this feedback to control whether estimation is performed. The reliability level determination feeds back to the estimation process, allowing the system to adjust its behavior based on the quality of recognition results
2Area of stationary object
If the estimated shape of the traveling demarcation line is used for vehicle traveling control, then the control can operate with limited recognition range, but the controllability decreases when the estimation accuracy is low
Solution Approach 1:
The system changes the parameter of control reliability by introducing a reliability level parameter that determines whether estimated demarcation line information can be used for vehicle control. When reliability is low, the parameter changes to invalidate the estimation, thereby protecting control reliability
Data Source
AI summary
A demarcation line recognition apparatus is applied to a vehicle in which an imaging apparatus that captures an image of an area ahead of the vehicle is mounted. The demarcation line recognition apparatus includes: a demarcation line recognizing unit that recognizes a traveling demarcation line that demarcates a traveling lane of the vehicle based on an image acquired by the imaging apparatus; and a demarcation line estimating unit that estimates a shape of the traveling demarcation line in a range that cannot be recognized by the demarcation line recognizing unit, based on the traveling demarcation line recognized by the demarcation line recognizing unit. The demarcation line recognition apparatus determines a reliability level of the traveling demarcation line recognized by the demarcation line recognizing unit and invalidates the estimation of the shape of the traveling demarcation line by the demarcation line estimating unit based on the determination result.