Adaptive Rear Camera Field of View for Steering-Guided Reversing
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Solution Overview
Problem
Existing vehicle vision systems with fixed cameras struggle to efficiently process and display relevant image data during reversing maneuvers, as they capture and process the entire wide-angle field of view, leading to increased processing requirements and reduced visibility of the region of interest.
Innovation Solution
A vehicle vision system that utilizes a CMOS camera with a wide-angle lens, processing only a sub-array of the imaging array to provide an adaptive field of view, digitally panning or sweeping the field of view based on the steering wheel angle, thereby reducing processing requirements and enhancing visibility of the region of interest.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the camera processes the entire wide-angle field of view, then complete coverage is achieved, but processing requirements increase and visibility of the region of interest decreases
Solution Approach 1:
The imaging array is divided into multiple sub-arrays, with each sub-array corresponding to a specific region of interest. The system selectively activates only the relevant sub-arrays based on steering angle, thereby segmenting the processing task into manageable portions rather than processing the entire wide-angle field of view simultaneously.
Solution Approach 2:
The system dynamically adjusts which sub-arrays are active based on the steering angle input. As the steering angle changes, the system dynamically selects and activates different sub-arrays to process only the relevant regions, making the processing configuration adaptive rather than static.
2Device complexity
If the camera uses a fixed field of view, then processing is simplified, but visibility of the region of interest during steering maneuvers is reduced
Solution Approach 1:
The system employs dynamic selection of sub-arrays based on steering angle input. When the steering wheel is turned, the system automatically activates the sub-arrays corresponding to the new region of interest, providing adaptive visibility without requiring physical camera movement or complex real-time processing of the entire field of view.
Solution Approach 2:
The imaging array is pre-configured with multiple sub-arrays that correspond to different regions of interest. This preliminary segmentation allows the system to quickly switch between regions by simply activating different pre-configured sub-arrays, rather than having to process and then crop the entire image in real-time.
3Device complexity
If only a sub-array is processed, then processing requirements are reduced, but the field of view coverage is limited
Solution Approach 1:
The system dynamically switches between different sub-arrays based on steering angle input. While only one sub-array is processed at a time, the system provides comprehensive coverage over time by activating different sub-arrays as the steering angle changes, effectively covering the entire wide-angle field of view through sequential processing.
Solution Approach 2:
The system periodically switches between different sub-arrays as the steering angle changes during normal operation. This periodic activation of different sub-arrays ensures that all regions of the wide-angle field of view are covered across different operating conditions, while maintaining low processing requirements at any given moment.
Data Source
AI summary
A vehicular vision system includes a camera fixedly mounted at a vehicle. The camera has a central viewing axis that bisects a total available field of view exterior of the vehicle of the camera into an at least 90 degrees zone to the left and to the right of the central viewing axis. During a driving maneuver of the vehicle, a video display screen displays video images representative of a reduced field of view of the camera that is less than the total available field of view exterior of the vehicle. During the driving maneuver of the vehicle, and as the steering angle of the vehicle is adjusted toward the right side or left side of the vehicle, the reduced field of view of the camera digitally pans toward the respective right side or left side of the total available field of view exterior of the vehicle of the camera.