Road Division Line Map Updating With Feature Point Verification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing map generation systems using camera images for detecting road division lines are prone to erroneous detection, leading to incorrect determination of line position shifts, which can hinder accurate self-driving capabilities.
Innovation Solution
A map generation apparatus that includes a division line detection part and a feature point detection part, utilizing a microprocessor to generate and compare maps at different time points, determining position changes based on differences in both division line and feature point information, ensuring accurate map updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If division line position is determined using only camera image recognition, then the system is simple and fast, but erroneous detection occurs leading to incorrect determination of line position shifts
Solution Approach 1:
The patent introduces an intermediary verification mechanism using feature point detection as a mediator to validate division line position changes. Instead of directly trusting camera-based division line detection, the system uses feature points as an intermediate reference to confirm whether detected position shifts are real or erroneous, thereby improving reliability without requiring completely new detection technology
Solution Approach 2:
The system implements feedback by comparing division line positions across multiple time points and using feature point detection results to verify whether detected changes are legitimate. When a position shift is detected, the system feedback-checks against feature point data to confirm validity before accepting the change, preventing erroneous detections from propagating
2Productivity
If map updates are performed frequently using only division line detection, then map currency is improved, but erroneous detections increase leading to incorrect updates
Solution Approach 1:
The system performs preliminary verification using feature point detection before accepting and applying map updates. By pre-checking division line position changes against feature point references before committing updates, the system enables frequent update attempts while filtering out erroneous detections through preliminary validation
Solution Approach 2:
The system uses feedback loops to compare division line positions across time points and verify changes against feature point data. This feedback mechanism allows frequent update cycles while maintaining accuracy by only accepting updates that pass verification against multiple detection methods
3Measurement precision
If external map data is required for accurate division line detection, then detection accuracy is improved, but system independence and update flexibility are reduced
Solution Approach 1:
The system performs self-service by using its own feature point detection capabilities to verify and validate division line position measurements. Instead of relying on external map data for verification, the system independently checks detected changes against its own feature point references, maintaining measurement precision while achieving complete operational independence
Solution Approach 2:
The system achieves multi-functionality by using the same camera and processing unit for both feature point detection and division line detection. This universal approach allows the system to perform multiple functions (feature detection, division line detection, verification) with a single integrated system, eliminating dependency on external data sources while maintaining precision
Data Source
AI summary
A map generation apparatus including a division line detection part, a feature point detection part and a microprocessor. The microprocessor is configured to perform generating a first map including position information of the division line detected by the division line detection part, generating a second map including position information of the feature points detected by the feature point detection part, and determining whether a position of the division line has changed, the determining including determining that the position of the division line has changed when a degree of difference between two first maps respectively generated at a first time point and a second time point after the first time point is a first predetermined degree or more and a degree of difference between two second maps respectively generated at the first time point and the second time point is a second predetermined degree or more.