Object Detection Lateral Width Correction
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Solution Overview
Problem
Existing object detection systems inaccurately determine the lateral width of objects due to positioning and presence of other objects, leading to incorrect warnings or collision avoidance controls.
Innovation Solution
An object detection device that uses an imaging means to acquire object dimensions, compares current and past lateral widths, and corrects end positions based on deviation amounts to ensure accurate width determination, employing a lateral width acquisition unit, determination unit, and correction unit to adjust for discrepancies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If lateral width is acquired based on image captured by imaging means, then object detection is performed, but the acquired lateral width may be smaller than actual width due to object shape and surface pattern
Solution Approach 1:
The patent applies feedback by comparing the currently acquired lateral width with the corrected lateral width from previous detection cycles. When the current width is smaller than the corrected width, the system uses feedback from deviation amounts of end positions to adjust and correct the measurement, ensuring that the lateral width accurately reflects the actual object dimensions despite variations in object shape or surface pattern.
Solution Approach 2:
The system performs preliminary correction by calculating deviation amounts of the right and left end positions before finalizing the lateral width measurement. This preliminary action involves comparing acquired end positions with expected positions and pre-calculating correction values based on these deviations, which are then applied to obtain the accurate corrected lateral width before using it for detection decisions.
2Measurement precision
If current lateral width is corrected based on past lateral width, then measurement accuracy is improved, but device complexity increases due to history management and correction logic
Solution Approach 1:
The system implements self-service by automatically managing its own correction process without external intervention. The correction unit autonomously compares current lateral width with corrected past width, calculates deviation amounts of end positions, determines correction values, and applies corrections automatically. This self-service mechanism reduces the need for complex external control systems while maintaining high measurement precision.
3Measurement precision
If end positions are corrected by same deviation amount, then lateral width accuracy is improved, but position displacement may occur
Solution Approach 1:
The patent applies local quality by treating the right and left end positions differently based on their individual characteristics. Instead of applying a uniform correction to the entire object, the system calculates separate deviation amounts for the right end position and left end position, then applies corrections locally to each end based on its specific deviation. This ensures that each end position is corrected appropriately while preserving the overall positional accuracy of the object.
Data Source
AI summary
A driving support ECU includes: a lateral width acquisition unit that acquires from an image a dimension of an object in a lateral direction with respect to an imaging direction of an imaging means as a lateral width; a determination unit that compares the current lateral width with a past lateral width to determine whether the current width is smaller than the past lateral width; and a correction unit that, when the current lateral width is smaller than the past lateral width, corrects right and left end positions of the lateral width based on whichever is smaller, the deviation amount of the right end position of the object or the deviation amount of the left and position of the object.