Road Sign Recognition System Dynamic Display Duration
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Solution Overview
Problem
Existing systems for recognizing road signs in vehicles face challenges in accurately identifying all types of road signs, particularly those not consistent with traffic regulations, and suffer from decreasing recognition rates over time, especially when multiple signs are present or GPS-based systems are used, leading to unreliable information transmission to drivers.
Innovation Solution
A system and method that utilize a front-mounted camera and user interface device to process image data, considering travel situations and surroundings, which dynamically updates the display of road sign information based on reliability status, distance traveled, and elapsed time, ensuring accurate and reliable transmission of road sign data to the driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GPS-based systems are used for road sign recognition, then recognition capability is provided, but recognition rate decreases over time
Solution Approach 1:
The display unit dynamically adjusts the display duration of road sign information based on vehicle speed and distance traveled. The system calculates an expected detection distance and displays the sign information for a calculated duration, ensuring the information remains visible long enough for the driver to process it while accounting for varying driving conditions.
Solution Approach 2:
The system detects road signs in advance using the camera device and prepares the information for display before the vehicle reaches the sign's location. The processing unit calculates the appropriate display duration in advance based on current vehicle speed, ensuring the information is ready to be displayed at the optimal moment.
2Quantity of substance
If multiple road signs are present, then more information is available, but recognition accuracy decreases
Solution Approach 1:
The processing unit segments the detected road sign information into individual elements, analyzing each sign separately. The system evaluates multiple signs independently and determines the most relevant information to display, preventing confusion that would arise from presenting all detected signs simultaneously.
Solution Approach 2:
The system applies different processing priorities to different road signs based on their relevance and proximity. Signs that are more critical or closer to the vehicle receive higher priority in the display sequence, while less critical signs are processed differently or displayed with lower prominence.
3Reliability
If display duration is extended for reliability, then information transmission is improved, but driver distraction increases
Solution Approach 1:
The system dynamically changes the display duration parameter based on vehicle speed and the specific road sign detected. Faster vehicle speeds result in longer display durations to ensure the driver has sufficient time to process the information, while slower speeds allow for shorter display times, thereby minimizing distraction while maintaining reliability.
Data Source
AI summary
Various embodiment include a system and a method for recognizing road signs. An image of a road sign may be captured by least one image sensor. A vehicle computer may receive the image data representing one or more road signs along a route and display one or more images of the road sign based on the image data. The display may be capable of presenting one or more status of the road sign based on one or more travel states for the vehicle. These travel states may include at least one of an amount of elapsed travel time, distance travelled, or speed.