Fisheye Camera Image Conversion for Vehicle Tilt Compensation
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Solution Overview
Problem
Existing vehicle imaging systems using fisheye cameras face challenges in maintaining detection accuracy due to image distortion and orientation changes of the vehicle, such as tilting during acceleration, deceleration, or steering, which affect the acquisition of desired peripheral information.
Innovation Solution
A control device that includes detection units to identify vehicle orientation and a control unit to adjust the conversion center position for converting fisheye images into planar images, ensuring accurate imaging and detection regardless of vehicle orientation changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If distortion correction processing is performed on fisheye images, then detection accuracy is improved, but the system cannot account for vehicle orientation changes causing inaccurate image acquisition
Solution Approach 1:
The patent makes the conversion center position dynamic by adjusting it according to detected vehicle orientation changes. Instead of using a fixed conversion center position, the system dynamically modifies the position based on acceleration, deceleration, and steering inputs, allowing the distortion correction to remain accurate despite vehicle movement and orientation changes.
Solution Approach 2:
The system implements feedback by detecting vehicle orientation changes through acceleration sensors and using this information to adjust the conversion center position. The detected orientation state is fed back into the image processing algorithm to compensate for distortion, creating a closed-loop system that maintains detection accuracy under varying vehicle conditions.
2Device complexity
If a fixed conversion center position is used for fisheye image conversion, then processing is simpler, but detection accuracy decreases when vehicle orientation changes
Solution Approach 1:
The patent transitions from a static conversion center position to a dynamic one that adapts to vehicle orientation. The conversion center is adjusted based on real-time detection of acceleration, deceleration, and steering states, maintaining processing simplicity while improving accuracy through conditional position modifications.
3Area of stationary object
If fisheye cameras are used to widen detection range, then coverage area is improved, but image distortion reduces detection accuracy
Solution Approach 1:
The patent applies local quality by using different conversion center positions for different vehicle states (acceleration, deceleration, steering). Each state has its own optimized conversion center position that maintains image quality and detection accuracy for that specific condition, allowing the system to maintain high precision across the wide detection range provided by fisheye cameras.
Data Source
AI summary
A control device that controls imaging with fisheye cameras disposed on front and rear portions and right and left side portions of a vehicle, the control device comprising: a detection unit configured to detect an orientation of the vehicle; and a control unit configured to control a conversion center position for converting a fisheye image of each of the fisheye cameras into a planar image based on the orientation of the vehicle.