AR Display Alignment Using Filtered Road Undulation Estimation
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Solution Overview
Problem
Existing techniques for estimating road surface undulation from camera-captured images suffer from inaccuracies due to noise and poor image quality, leading to misalignment of superimposed content and user confusion.
Innovation Solution
A display system that estimates road surface undulation by obtaining and processing multiple images, applying predetermined conditions to select accurate road surface undulation information items, and excluding noisy or inaccurate data to improve estimation accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple road surface undulation information items are obtained from multiple images, then the estimation accuracy can be improved, but the amount of data to be processed increases and computation time increases
Solution Approach 1:
The patent extracts and selects only the necessary road surface undulation information items that satisfy predetermined conditions from the multiple obtained items, discarding unnecessary data. This selective extraction reduces the data processing burden while maintaining estimation accuracy by focusing on high-quality information.
Solution Approach 2:
The patent changes the parameter of data quality by applying predetermined conditions to filter road surface undulation information items. By evaluating and selecting items based on these conditions, the system ensures high estimation accuracy while reducing the volume of data requiring detailed processing.
2Reliability
If all obtained road surface undulation information items are used for estimation, then the data utilization is maximized, but the estimation accuracy decreases due to inclusion of noisy or inaccurate data
Solution Approach 1:
The patent extracts only the reliable road surface undulation information items that satisfy predetermined conditions from the set of all obtained items. This selective extraction removes noisy or inaccurate data while retaining high-quality information, thereby improving estimation reliability without sacrificing precision.
Solution Approach 2:
The patent applies different quality standards to different road surface undulation information items by evaluating each against predetermined conditions. This local quality assessment ensures that only high-reliability data items are used in the estimation, improving overall estimation reliability while maintaining precision.
3Measurement precision
If road surface undulation information items not satisfying predetermined conditions are excluded, then the estimation accuracy is improved, but the quantity of usable data decreases
Solution Approach 1:
The patent extracts and retains only the road surface undulation information items that satisfy predetermined conditions, excluding those that do not. This selective extraction improves estimation accuracy by ensuring data quality, while the predetermined conditions are designed to preserve sufficient quantity of usable data for reliable estimation.
Solution Approach 2:
The patent changes the parameter of data quality threshold by applying predetermined conditions for inclusion. This parameter change ensures that only high-quality data items are used, improving estimation accuracy while maintaining an adequate quantity of usable data through appropriately set conditions.
Data Source
AI summary
A display system includes: a road surface undulation estimator that estimates undulation of a road surface; a superimposing position determiner that determines, based on the estimated undulation, a superimposing position at which content is to be displayed by being superimposed on a foreground; and a display that displays the content with the content superimposed on the foreground at the determined superimposing position. The road surface undulation estimator includes: a road surface undulation information obtainer that obtains road surface undulation information items indicating the undulation at points and being calculated based on images generated when an imager provided to a mobile body performs image capturing a plurality of times; a determiner that determines whether or not the obtained road surface undulation information items each satisfy a predetermined condition; and an estimator that estimates the undulation based on road surface undulation information items which have been determined to satisfy the predetermined condition.