Rearview Camera Sub-FOV Display for Vehicle Reversing
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Solution Overview
Problem
Existing rearview imaging systems for vehicles often distract drivers with overly complex or distorted images, failing to provide a clear and informative view of the vehicle's surroundings, especially during reversing and turning operations.
Innovation Solution
A rearview imaging system that uses a wide-angle camera mounted at the rear of the vehicle, with a video processor subdividing the field of view into multiple sub-FOVs, dynamically adjusting the display to prioritize relevant areas based on vehicle motion, and rotating the center FoV to include foreground objects, thereby providing a clear and intuitive image on a widescreen display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a wide-angle camera is used to provide a panoramic view, then the field of view coverage is improved, but the image distortion and complexity increase
Solution Approach 1:
The patent divides the wide-angle field of view into multiple sub-fields of view (sub-FOVs), each processed and displayed separately. This segmentation reduces the complexity of processing the entire wide-angle image while maintaining comprehensive coverage, as each sub-FOV can be handled with simpler processing algorithms.
Solution Approach 2:
The patent extracts and prioritizes display of specific sub-FOVs based on vehicle motion state. Instead of displaying all sub-FOVs equally, the system identifies and extracts the most relevant areas (e.g., areas with obstacles or requiring attention) and gives them priority display, reducing overall processing complexity while maintaining safety.
2Loss of information
If multiple sub-FOVs are displayed simultaneously, then the information completeness is improved, but the driver distraction increases
Solution Approach 1:
The patent dynamically adjusts which sub-FOVs are displayed and their display priorities based on real-time vehicle motion state (reversing, turning, stationary). This dynamic adaptation ensures that only relevant information is prominently displayed at any given moment, reducing driver distraction while maintaining information completeness when needed.
Solution Approach 2:
Different sub-FOVs are given different display qualities and priorities based on their relevance to current vehicle operations. Critical areas (e.g., reverse path, turning radius) receive enhanced display treatment while less critical areas are displayed with lower priority, optimizing the balance between information completeness and driver distraction.
3Ease of operation
If the field of view is narrowed during forward motion, then the driver distraction is reduced, but the situational awareness is compromised
Solution Approach 1:
The system dynamically adjusts the field of view display based on vehicle motion state. During forward motion, the display narrows to reduce distraction, but can quickly expand or switch to showing relevant sub-FOVs when reversing or turning, maintaining situational awareness when needed while reducing distraction during normal driving.
Solution Approach 2:
The system prepares multiple sub-FOV configurations in advance for different driving scenarios. When a maneuver like reversing or turning is detected, the relevant sub-FOVs are already prepared and can be immediately displayed, ensuring situational awareness is maintained without requiring real-time processing that would increase distraction.
Data Source
AI summary
A rearview imaging system for a vehicle includes at least one video camera mounted at the rear of the vehicle for providing a wide angle horizontal field of view (FoV) rearwardly of the vehicle, and a display device in the vehicle at a position viewable by the driver. A video processor subdivides the camera FoV into three horizontally disposed sub-FOVs and displaying said sub-FoVs on visually separated side-by-side regions of the display device screen. The horizontal position and/or extent of at least one sub-FoV is variable as a function of the motion of the vehicle.