Adaptive Tracking Parameter Adjustment for 3D Scanning Distance Variations
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Solution Overview
Problem
In tracking-type three-dimensional scanning, variations in the distance between the tracking apparatus and the to-be-tracked object lead to overexposure or underexposure of tracking images, resulting in imprecise pose information and reduced tracking and measurement accuracy.
Innovation Solution
A method for determining a tracking parameter level based on the current tracking distance, which includes acquiring the tracking distance and mapping it to a corresponding distance interval, allowing for adjustments to camera exposure parameters and tracking feature parameters such as light supplementing and emitting parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the tracking apparatus maintains a fixed tracking parameter level, then the device complexity is reduced, but the tracking accuracy deteriorates when the tracking distance varies
Solution Approach 1:
The patent applies dynamics by making the tracking parameters adjustable and adaptive rather than fixed. The system dynamically changes exposure parameters and tracking feature parameters based on the current tracking distance, allowing the tracking apparatus to adapt to varying distances and maintain high tracking accuracy throughout the measurement range.
Solution Approach 2:
The patent implements parameter changes by modifying exposure parameters (such as exposure time, gain) and tracking feature parameters (such as marker brightness, size) according to the tracking distance. This ensures optimal image quality and feature recognition across different distances without requiring complex hardware changes.
2Measurement precision
If the tracking apparatus adjusts tracking parameters frequently, then the tracking accuracy is maintained, but the loss of time increases due to parameter adjustments
Solution Approach 1:
The patent applies preliminary action by pre-establishing the correspondence relationship between tracking distances and optimal tracking parameter levels. The system uses the known or estimated tracking distance to directly select appropriate parameters without requiring iterative adjustment or complex real-time optimization, thus minimizing time loss while maintaining accuracy.
3Measurement precision
If the tracking apparatus uses fixed exposure parameters, then the device complexity is reduced, but the measurement precision deteriorates due to overexposure or underexposure
Solution Approach 1:
The patent implements parameter changes by adjusting exposure parameters (exposure time, gain, aperture) based on the tracking distance. This ensures that the captured images have appropriate brightness and contrast for accurate feature recognition, preventing overexposure when the object is close and underexposure when the object is far, thereby maintaining high measurement precision.
Data Source
AI summary
A tracking method for a tracking measurement system including a tracking apparatus is provided. The method includes acquiring a current tracking distance between the tracking apparatus and a to-be-tracked object, and determining, based on the current tracking distance, a tracking parameter level for the tracking apparatus.