Marking Line Detection System Branching Road Correction
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Solution Overview
Problem
Existing marking line detection systems fail to accurately detect the main driving road's marking lines when a branching road is present, as they incorrectly correct the virtual white-line approximate lines based on the branching road's lines, especially when the branching road's line is broken or obscure, leading to incorrect detection of the main driving road's lines.
Innovation Solution
A marking line detection system that includes an imaging device, a marking line candidate detection unit, a center line determination unit, and a validity determination unit to identify and correct the position of marking line candidates, avoiding corrections based on branching road lines by designating a valid center line as the reference line, which is not connected or less likely connected to a branching road.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the system corrects the virtual white-line approximate line based on the line with lower approximation error, then the detection accuracy improves when the main road line is clear, but the detection accuracy deteriorates when the branching road line is broken or obscure
Solution Approach 1:
The system segments the road detection task by separately identifying the main driving road and branching roads, then selectively applying correction only to the main road marking lines based on validity determination, preventing contamination from branching road lines
Solution Approach 2:
The system introduces a center line determination unit and validity determination unit as intermediary components that act as filters between the marking line candidate detection and position correction processes, ensuring that only valid center lines on the main driving road are used for correction
2Productivity
If the system corrects marking line positions based on any detected line, then the detection speed is fast, but the detection accuracy deteriorates due to incorrect reference lines
Solution Approach 1:
The system performs preliminary determination of center line validity before the position correction process, using the center line determination unit and validity determination unit to pre-filter candidate lines, ensuring that only valid main road center lines are used as reference for correction, thus maintaining both speed and accuracy
Data Source
AI summary
A marking line detection system includes an imaging device, a marking line candidate detection unit, a marking line correction unit, a center line determination unit and a validity determination unit. The marking line candidate detection unit detects first and second vehicle's marking line candidates. The marking line correction unit corrects a position of the second vehicle's marking line candidate based on a position of the first vehicle's marking line candidate. When the first vehicle's marking line candidate is the valid center line, the marking line correction unit performs a correction of the position of the second vehicle's marking line candidate based on the position of the first vehicle's marking line candidate. When the first vehicle's marking line candidate is not the valid center line, the marking line correction unit does not perform the correction based on the position of the first vehicle's marking line candidate.