Dynamic Perspective Shifting for Rear-View Camera Systems
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Solution Overview
Problem
Rear-view camera systems on motor vehicles with moveable components, such as tailgates or lift gates, face the challenge of maintaining a relevant perspective for the operator as the camera position changes, leading to an irrelevant image due to fixed camera perspectives.
Innovation Solution
A dynamic perspective shifting system that captures a 180-degree field of view image from the rear-view camera, determines the camera's position using sensors or reference points, modifies the image to maintain a consistent perspective by cropping and correcting distortions, and continuously displays this virtual perspective on a vehicle display device as the camera moves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the rear-view camera is mounted on a moveable component to preserve functionality, then the camera can be installed on vehicles with tailgates or lift gates, but the image perspective becomes irrelevant when the component moves
Solution Approach 1:
The system dynamically adjusts the displayed image perspective based on the camera's current position and orientation. Sensors detect camera movement and the controller continuously modifies the image processing parameters to maintain a consistent virtual perspective, transforming the static image output into a dynamic adaptation that compensates for camera relocation.
Solution Approach 2:
The controller changes image processing parameters including cropping regions, distortion correction factors, and perspective transformation matrices based on detected camera position. By adjusting these parameters in real-time, the system maintains image relevance despite physical camera movement on moveable components.
2Loss of information
If the camera position is fixed to maintain a consistent perspective, then the image remains relevant to the operator, but the camera cannot be moved with moveable components like tailgates
Solution Approach 1:
The system creates a virtual copy of the desired fixed perspective through image processing. Rather than physically fixing the camera, the controller generates a virtual perspective image that replicates what the camera would see from a fixed position, allowing physical flexibility while maintaining visual consistency.
3Area of moving object
If the camera uses a wide angle lens to view 180 degrees behind the vehicle, then the field of view is maximized, but image distortion increases
Solution Approach 1:
The system replaces optical correction (mechanical lens design) with digital image processing. The controller applies computational algorithms to correct wide-angle distortion, substituting mathematical transformation for optical precision and achieving both wide field of view and accurate geometry.
Solution Approach 2:
The controller dynamically adjusts distortion correction parameters based on the camera's field of view and position. By changing the correction matrix parameters in real-time, the system optimizes the balance between maintaining wide-angle coverage and minimizing geometric distortion in the displayed image.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures a consistent and relevant image is displayed to the operator, even when the camera's position changes, enhancing visibility and compliance with safety standards like FMVSS 111 by dynamically adjusting the camera's perspective.
Implementation Method 1
determining the position of the camera includes sensing a change in a gyroscope connected to the camera
Data Source
AI summary
A system for displaying an image on a display device of a motor vehicle includes a rear-view camera connected to a moveable component on the motor vehicle and a controller in communication with the rear-view camera. The controller has memory for storing control logic and a processor configured to execute the control logic. The control logic includes capturing a field of view image from the rear-view camera, determining a position of the rear-view camera, determining an image perspective relationship of the field of view image based on the position of the rear-view camera, modifying the field of view image based on the image perspective relationship to create a virtual perspective image, and displaying the virtual perspective image on the display device in the motor vehicle as the position of the rear-view camera changes between at least a first position and a second position.