Wide-Angle Camera Object Detection Distortion Correction
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Solution Overview
Problem
Existing object position detection devices using wide-angle cameras face high processing loads due to image distortion, which is challenging with limited calculation resources in in-vehicle systems.
Innovation Solution
An object position detection device that includes an image acquisition unit, a region setting unit, a candidate point setting unit, a representative point selection unit for distortion correction, and a coordinate acquisition unit to identify and output the ground contact position of objects with reduced processing load by focusing on specific pixels and panoramic conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If distortion correction is executed on the entire wide-angle image to accurately detect object positions, then measurement precision is improved, but processing load and device complexity increase
Solution Approach 1:
The patent divides the wide-angle image into multiple regions and performs distortion correction only on specific regions containing objects, rather than correcting the entire image. This segmentation approach maintains detection accuracy for objects while reducing the overall processing load and computational complexity of the system
Solution Approach 2:
The patent applies distortion correction selectively to local regions where objects are detected, rather than uniformly across the entire image. This local quality approach ensures high measurement precision for object positions in regions of interest while minimizing processing requirements for other areas
2Area of stationary object
If a wide-angle camera is used to capture a wide range of surrounding conditions, then the detection coverage area is improved, but image distortion increases
Solution Approach 1:
The patent segments the wide-angle image into multiple regions and applies distortion correction only to regions containing objects. This allows the system to maintain wide detection coverage while managing distortion effects locally rather than requiring global correction
Solution Approach 2:
The patent extracts and corrects only the necessary portions of the distorted wide-angle image that contain objects of interest. By taking out and processing only the relevant regions, the system maintains wide coverage capability while reducing the impact of distortion on detection accuracy
Data Source
AI summary
An object position detection device including an image acquisition unit acquiring imaging data of surrounding conditions of a vehicle cabin using a wide-angle camera; a region setting unit setting, in the wide-angle image, a region of interest surrounding a region of an object; a candidate point setting unit setting candidate points that are candidates for a present position of the object on or in a vicinity of a boundary line defining the region of interest; a representative point selection unit determining a reference point at a predetermined position in the region of interest, executing distortion correction on the reference point and the candidate points, and selecting a representative point regarded as a ground contact position of the object from the candidate points after the distortion correction; a coordinate acquisition unit acquiring three-dimensional coordinates of the representative point; and an output unit configured to output position information on the ground contact.