Marker Recognition Luminance Correction for Moving Body Support
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Solution Overview
Problem
The accuracy of marker recognition by moving bodies, such as vehicles, is compromised due to changes in brightness at the marker's position caused by environmental factors like weather, shadows, and time of day, leading to decreased operational accuracy.
Innovation Solution
A moving body support system that estimates brightness at the marker's position without using a camera image and calculates a luminance correction value to correct the image luminance, enabling accurate marker recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the moving body recognizes the marker by capturing an image using a camera, then the marker recognition can be performed, but the brightness changes at the marker position due to environmental factors cause recognition accuracy to decrease
Solution Approach 1:
The system performs preliminary brightness estimation at the marker position before image capture, and pre-calculates the luminance correction value based on this estimation. This preliminary action allows the system to compensate for brightness changes in advance, ensuring accurate marker recognition even under varying environmental conditions such as weather, time of day, and shadow presence.
2Measurement precision
If luminance correction is applied to the captured image, then marker recognition accuracy is improved, but processing complexity increases
Solution Approach 1:
The system changes the luminance parameter of the captured image by applying a calculated luminance correction value. This parameter change compensates for brightness variations at the marker position, improving recognition accuracy while maintaining relatively simple processing through direct luminance adjustment rather than complex image reconstruction.
Data Source
AI summary
A moving body support system supports a moving body that recognizes a marker arranged in a predetermined area. The moving body support system estimates brightness at a position of the marker in the predetermined area without using an image captured by a camera mounted on the moving body. The moving body support system calculates a luminance correction value of an image including the marker according to the brightness at the position of the marker. The moving body support system acquires a first image including a target marker around the moving body by using the camera. The moving body support system generates a second image by correcting luminance of the first image by using the luminance correction value for the target marker. Then, the moving body support system recognizes the target marker based on the second image.