Vehicle Camera Calibration at Standstill Using Image Flux Vectors
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Solution Overview
Problem
Existing vehicle surround view systems require online calibration during driving operations, which may not accurately represent vehicle surroundings, especially when the vehicle is loaded, leading to incorrect distance estimation and unsuitable surround view representation during parking or driving off.
Innovation Solution
A method and device that calibrate vehicle cameras at a standstill by reading and comparing camera images to set calibration parameters, using flux vectors and reference vectors, and accounting for camera movements caused by door and mirror adjustments, ensuring correct calibration before driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If online calibration is performed during driving operation, then calibration correction can be achieved, but the calibration accuracy deteriorates due to vehicle movement and loading changes
Solution Approach 1:
The patent performs calibration at vehicle standstill before driving operation begins, rather than during driving. This preliminary calibration ensures accurate distance estimation and surround view representation are established before the vehicle moves, avoiding the inaccuracies that occur when calibration is attempted during motion or after loading changes have already affected camera positions
2Adaptability or versatility
If calibration is performed during driving operation, then calibration updates can be made, but the representation of vehicle surroundings becomes inaccurate especially when vehicle is loaded
Solution Approach 1:
The system performs calibration before driving operation and before loading changes can affect the vehicle. By establishing the calibration baseline when the vehicle is at standstill and presumably in a known loading state, the system prevents calibration errors from occurring in the first place, rather than attempting to correct them after loading has distorted camera positions
3Ease of manufacture
If static calibration rule is stored from design data, then calibration is simple to implement, but calibration errors occur due to manufacturing tolerances and loading changes
Solution Approach 1:
The patent implements a feedback mechanism where the system actively performs calibration routines at vehicle standstill, using actual camera images and detected features to determine calibration parameters. This feedback loop allows the system to compensate for manufacturing tolerances and loading changes by measuring the actual camera positions and adjusting calibration accordingly, rather than relying solely on pre-stored static calibration data
Data Source
AI summary
A method for calibrating a vehicle camera of a vehicle includes at least one task of reading in and one task of setting. In the reading in, at least one first camera image and one second camera image are read in, which represent images recorded by at least the vehicle camera during a camera movement of the vehicle camera at a standstill of the vehicle. In the setting, a calibration parameter for calibrating at least the vehicle camera is set, using the first camera image and the second camera image.