Digital Rearview Camera Alignment via Horizon Line Detection
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Solution Overview
Problem
Existing digital rear-view systems in vehicles require precise calibration to ensure compliance with regulatory horizon line positioning, which is currently impossible to verify in enclosed spaces, necessitating costly and time-consuming outdoor verification.
Innovation Solution
A method for adjusting digital rear-view devices involving a first step of capturing an image with a camera positioned behind the vehicle, displaying a horizon line at a predefined height, and a second step of adjusting the camera and image display to ensure the horizon line is displayed at or above the required height, enabling precise calibration even in confined spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual adjustment of camera position and angle is used, then device complexity is reduced, but manufacturing precision and alignment accuracy deteriorate
Solution Approach 1:
The system performs self-alignment by automatically detecting the camera's position and angle relative to the display device and adjusting accordingly without requiring manual intervention, thereby maintaining precision while reducing operational complexity
Solution Approach 2:
The patent replaces manual mechanical adjustment with an automated optical alignment system that uses image processing and control algorithms to detect and correct camera positioning, substituting mechanical manual operations with automated electronic control
2Ease of operation
If manual adjustment of camera position and angle is used, then ease of operation is improved, but reliability of alignment deteriorates
Solution Approach 1:
The alignment system serves itself by automatically detecting misalignment and correcting camera positioning without requiring user intervention, ensuring consistent and reliable alignment results while simplifying the operator's task to merely initiating the process
Solution Approach 2:
The system continuously monitors the camera's alignment status through image capture and processing, providing real-time feedback to the adjustment mechanism to maintain precise alignment, thereby improving reliability while keeping operations simple
3Manufacturing precision
If automated alignment system with image processing is implemented, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The display device serves multiple functions: it acts as both the display screen and the reference target for alignment detection, eliminating the need for separate calibration targets and reducing overall system complexity while maintaining high precision
Solution Approach 2:
The patent introduces an image processing intermediary that analyzes the visual relationship between the camera view and display device, serving as a mediator that translates optical information into precise alignment adjustments without requiring complex mechanical systems
Data Source
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Figure 3
AI summary
Disclosed is a method for adjusting a digital rearview device (DR) comprising a camera (CN) positioned in a rear portion (PR) of a vehicle (V) for acquiring images of the rear environment of said vehicle, and a display screen (EA) displaying at least a selected part of the acquired images, which method includes: - a first step in which an image representative of an environment comprising a horizon line is placed behind the rear part (PR) in an adjustment position, and then an image is acquired and a portion of this acquired image is displayed on the display screen (EA) with a horizontal line located at a minimum display height of the horizon line, and a second step in which the position of the camera (CN) and/or the portion of the acquired image to be displayed is adjusted so that the horizon line is displayed at a height greater than or equal to the horizontal line.