Stereo Camera Resynchronization via Padding Data Adjustment
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Solution Overview
Problem
In autonomous vehicles, stereoscopic camera systems face synchronization challenges due to differences in frame capture times between two cameras, leading to desynchronization issues that affect accurate environmental perception.
Innovation Solution
The method involves sending commands to modify the frame rate of out-of-sync cameras by adjusting their padding data settings, allowing for synchronization without altering their clock signals, and restoring the original settings once synchronization is achieved.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the frame rate of the first camera is modified by adjusting padding data settings to resynchronize with the second camera, then synchronization accuracy is improved, but device complexity increases due to additional control commands and settings management
Solution Approach 1:
The patent modifies the padding data setting parameter of the first camera to adjust its frame rate and achieve resynchronization with the second camera. This parameter change approach allows precise control over frame capture timing without hardware modifications, directly improving synchronization accuracy while using software-based control.
Solution Approach 2:
The system continuously monitors the synchronization state between the two cameras and sends appropriate commands (modify or restore padding data settings) based on whether the cameras are synchronized or out of sync. This feedback mechanism ensures accurate resynchronization while managing control complexity through automated decision-making.
2Loss of time
If padding data settings are continuously adjusted to maintain synchronization, then frame capture timing is improved, but loss of information occurs due to modified padding data affecting image quality
Solution Approach 1:
The system determines an interval for sending the restore command in advance, independent of actual resynchronization status. This preliminary action ensures that padding data settings are restored to original values after a predetermined time period, preventing permanent modification and preserving image data integrity while still achieving temporary frame rate adjustment for timing correction.
Solution Approach 2:
The patent implements periodic restoration of padding data settings by determining an interval for sending restore commands. This periodic action allows the system to temporarily modify frame rates for synchronization while ensuring settings are restored periodically, maintaining image quality by cycling between adjusted and original states.
Data Source
AI summary
Stereoscopic camera resynchronization in an autonomous vehicle may include: sending, to a first camera out of synchronization with a second camera, a first command to modify a frame rate of the first camera by modifying a padding data setting of the first camera; determining, independent of any determination that the first camera and second camera are resynchronized, an interval for sending, to the first camera, a second command to restore the padding data setting of the first camera; and sending, responsive to the interval occurring, the second command to the first camera.