Backup Camera View Switching for Distortion-Aware Reversing
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Solution Overview
Problem
Wide angle backup cameras in vehicles suffer from pronounced spherical distortion, especially at the edges, making it difficult to identify and detect objects in the vehicle's path, and existing systems either provide full wide-angle views with significant distortion or cropped views that miss important peripheral information.
Innovation Solution
A vehicle backup camera system that selectively displays a full wide-angle view, a cropped and enlarged view, or a processed version to reduce distortion, allowing for enhanced visibility of edge segments and improved object detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a wide angle fisheye lens is used to capture the maximum backup area, then the field of view is improved, but spherical distortion increases making object detection difficult
Solution Approach 1:
The patent divides the backup camera view into multiple display modes: full wide-angle view, cropped central view, and hybrid view. This segmentation allows the system to present different portions of the distorted image according to specific driving circumstances, optimizing both field of view and object detection accuracy for different scenarios.
Solution Approach 2:
The system dynamically switches between different display angles and view modes based on detected circumstances such as presence of adjacent parked vehicles, pedestrian detection, and reversing path requirements. This dynamic adaptation resolves the contradiction by adjusting the effective field of view and distortion level according to real-time needs.
2Measurement precision
If the image is cropped and enlarged to reduce distortion, then object detection is improved, but peripheral information is lost
Solution Approach 1:
The system dynamically adjusts the crop and enlargement level based on detected circumstances. When adjacent parked vehicles are detected or pedestrians are present, the system maintains a wider effective field of view. When the path is clear and no obstacles are detected, the system can apply more aggressive cropping and enlargement to reduce distortion and improve object detection accuracy.
3Measurement precision
If a narrow angle lens is used to reduce distortion, then image clarity is improved, but the backup area coverage is reduced
Solution Approach 1:
The system makes the backup camera view facility multi-functional by supporting multiple display modes (full wide-angle, cropped central, hybrid) within a single system. This allows the same camera hardware to serve both wide-area coverage needs and clear object detection needs by dynamically selecting the appropriate display mode based on driving circumstances.
Data Source
AI summary
A vehicle with backup camera view facility has a body having a front and rear end, a rear camera connected to the rear end of the body, and operable to generate an image of a objects to the rear of and lateral to the rear of the vehicle, the rear camera having a selected first angle of view, a controller connected the rear camera, a display connected to the controller, and the controller operable make a display angle selection to control the display to selectably display the first angle of view in a first selected circumstance, and to control the display to selectably display a second angle of view narrower than the first angle of view in a second selected circumstance. The display angle selection may be based on the presence of adjacent parked vehicles.