Signal Light Display Determination via Adjacent Region Correction
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Solution Overview
Problem
Existing signal light display determination methods are inefficient in accurately determining the operation status of stacked-type signal lights due to interference from adjacent lamps and natural sunlight, leading to reduced accuracy in determining the lit or unlit states.
Innovation Solution
A signal light display determination device that captures images of signal lights using a camera, corrects for natural sunlight and adjacent lamp effects, calculates lightness, and determines the display state by analyzing the rate of change in lightness over a predetermined time period, using a processor to execute programs that set regions, detect pixel values, convert color spaces, and correct for image noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If image information is acquired using a camera to determine signal light display state, then automation is improved, but measurement precision deteriorates due to interference from adjacent lamps and natural sunlight
Solution Approach 1:
The patent divides the image into multiple regions (first region containing the signal light display, second region in close proximity) and processes each region separately. By segmenting the analysis into distinct spatial zones, the system can apply different processing strategies to the signal light region versus the adjacent region, thereby improving measurement precision while maintaining automation.
Solution Approach 2:
The patent introduces an intermediary processing step that uses image information from the second region (adjacent to the signal light) to correct the image information in the first region (signal light display). This intermediary correction mechanism compensates for interference from adjacent lamps and natural sunlight, enhancing determination accuracy without reducing automation.
2Measurement precision
If correction is made based on adjacent region image information, then determination accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the image processing into distinct regions (first region for signal light, second region for adjacent area), allowing complex correction operations to be applied only where needed rather than to the entire image. This regional segmentation reduces overall processing complexity while maintaining high determination accuracy.
Solution Approach 2:
The patent applies different processing qualities to different regions: the first region receives comprehensive correction based on second region information, while the second region serves primarily as a reference. This local quality differentiation optimizes processing complexity by concentrating computational resources where they are most needed for accuracy.
Data Source
AI summary
A signal light display determination device includes a memory to store a program; and a processor to execute the program, wherein the processor executes the program toacquire image information regarding a first region and a second region that is in close proximity to the first region, the first region and the second region being within a region containing at least a portion of a display of a signal light that is image-captured by a camera,determine, based on the acquired image information regarding the second region, a display state of the display included in the second region, andcorrect the acquired image information regarding the first region when a determination is made that the display state of the display included the second region has not continued in a state below a threshold for a predetermined time period, the correction being made based on the acquired image information regarding second region.