Camera Calibration Device for In-Vehicle Optical Axis Alignment
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Solution Overview
Problem
Existing camera calibration technologies incorrectly detect changes in camera position posture due to temporary factors like occupant changes or baggage loading as secular changes in the optical axis, leading to erroneous corrections.
Innovation Solution
A camera calibration device with a storage unit for allowable camera position postures, an acquisition unit for acquiring riding patterns and camera postures, and a control unit for notifying and correcting optical axis deviations when the acquired posture is outside the allowable range, ensuring accurate differentiation between temporary and secular changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If camera position posture is corrected based on detected changes, then camera alignment accuracy is improved, but erroneous corrections occur due to temporary factors like occupant changes or baggage loading
Solution Approach 1:
The patent applies dynamics by making the camera position posture correction adaptive to different riding patterns. The system dynamically adjusts the reference posture based on detected occupant configurations (e.g., driver only, driver + passenger, rear seat occupancy). This allows the correction mechanism to respond appropriately to legitimate posture changes while filtering out erroneous corrections from temporary factors, thereby resolving the contradiction between improving alignment accuracy and maintaining correction reliability.
Solution Approach 2:
The patent changes the parameter of reference camera posture based on riding pattern detection. By storing multiple reference postures corresponding to different occupant configurations and selecting the appropriate reference based on current occupancy detection, the system distinguishes between legitimate posture variations (different riding patterns) and erroneous variations (temporary factors). This parameter change approach enables accurate corrections only when necessary, resolving the contradiction between alignment accuracy and correction reliability.
2Manufacturing precision
If camera calibration is performed frequently to maintain accuracy, then alignment precision is improved, but system complexity and processing time increase
Solution Approach 1:
The patent implements periodic action by performing camera calibration only at specific triggers: when a riding pattern change is detected or when explicitly requested. Instead of continuous or frequent calibration, the system periodically checks occupancy status and performs calibration only when necessary. This reduces system complexity and processing time while maintaining alignment precision by calibrating at appropriate intervals based on actual need.
Solution Approach 2:
The system performs self-service by automatically detecting riding patterns and triggering calibration only when changes occur. The occupancy detection system automatically identifies when calibration is needed based on detected riding pattern changes, eliminating the need for manual intervention or complex continuous monitoring. This self-service approach reduces system complexity while maintaining precision through on-demand calibration.
Data Source
AI summary
A camera calibration device includes: a storage unit configured to store an allowable range of a camera position posture including at least one of a position and an angle of an in-vehicle camera in association with a reference riding pattern that is a reference of an occupant's riding pattern with respect to a vehicle; an acquisition unit configured to acquire the riding pattern and the camera position posture at a preset timing; and a control unit configured to execute at least one of notification of optical axis deviation of the in-vehicle camera and correction of the optical axis deviation when the acquired camera position posture is not within the allowable range associated with the reference riding pattern that matches the acquired riding pattern in the storage unit.