Lane-Specific Traffic Sign Recognition for Accurate Speed Limits
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Solution Overview
Problem
Existing systems fail to accurately recognize maximum speed limits for vehicles when multiple signs indicating different speeds are installed for each lane.
Innovation Solution
An electronic device that includes a recognition part to identify signs from captured images, a sign identification part to determine the corresponding sign for the vehicle's lane, and an output part to provide information on the recognized regulations, using positional relationships between signs and lanes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple signs indicating different speed limits are installed for each lane, then the system can provide lane-specific speed regulation information, but the accuracy of recognizing the correct speed limit for the vehicle's current lane deteriorates
Solution Approach 1:
The system segments the road into multiple lanes and associates each lane with its corresponding speed limit sign. By dividing the recognition task into lane-specific segments, the system can accurately identify which speed limit applies to the vehicle's current lane position, resolving the confusion when multiple signs are present.
Solution Approach 2:
The system introduces lane position information as an intermediary element between the multiple speed limit signs and the vehicle. By determining the vehicle's lane position first, the system can then select the appropriate speed limit sign corresponding to that lane, enabling accurate recognition even when multiple signs are installed.
2Device complexity
If a simple image recognition method is used to detect road signs, then the system complexity is reduced, but the ability to correctly identify the corresponding sign for the vehicle's lane deteriorates
Solution Approach 1:
The system merges lane position detection functionality with the road sign recognition process. By combining these two functions into an integrated system, the patent achieves reliable identification of the correct speed limit sign without requiring separate complex subsystems, thus maintaining reasonable system complexity while improving reliability.
Solution Approach 2:
The system performs preliminary detection of the vehicle's lane position before identifying the relevant speed limit sign. This preliminary action allows the recognition system to focus on the specific sign corresponding to the current lane, improving reliability while keeping the overall system complexity manageable through targeted processing.
Data Source
AI summary
An electronic device includes: a recognition part that recognizes a plurality of signs indicating content of the regulations relating to traveling of a vehicle on the basis of a captured image obtained by capturing a region ahead of the vehicle; a first identification part that identifies, as a corresponding sign, a sign corresponding to a lane in which the vehicle travels among the plurality of signs recognized by the recognition part; and an output part that outputs information corresponding to content of the regulations indicated by the corresponding sign.