Structural Displacement Measurement with Camera Vibration Correction
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Solution Overview
Problem
Camera vibrations during image capture can cause blurriness or displacement, interfering with accurate measurement of structural displacement using image-based techniques.
Innovation Solution
An information processing method that utilizes multiple images captured from varying positions and orientations, along with corresponding camera parameters, to generate a model that corrects for displacement by subtracting the measured displacement amount from a reference position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If image-based displacement measurement is used, then non-contact measurement capability is improved, but measurement precision deteriorates due to camera vibrations causing blurry or displaced images
Solution Approach 1:
The patent introduces an intermediary correction process that uses camera vibration data as a mediator to adjust the measured displacement values. The correction unit acts as an intermediary between the raw measurement data and the final result, using vibration information to compensate for measurement errors caused by camera movement.
Solution Approach 2:
The system implements feedback by using the obtained camera vibration data to correct the displacement measurement results. The correction process feeds back the vibration information into the measurement calculation, allowing the system to adjust and compensate for vibration-induced errors in real-time.
2Measurement precision
If complex geometric calculations are used to correct camera vibration effects, then measurement precision is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent extracts only the essential vibration correction information from complex geometric calculations. Instead of performing full geometric corrections, the system extracts and uses only the necessary vibration data to adjust displacement measurements, simplifying the computational process while maintaining accuracy.
Solution Approach 2:
The system changes the measurement parameters by incorporating camera vibration data directly into the displacement calculation formula. This parameter change approach allows for simpler calculations compared to traditional geometric correction methods, as it directly adjusts the measurement values based on vibration parameters rather than performing complex coordinate transformations.
Data Source
AI summary
An information processing method includes: obtaining training images generated by a camera shooting a target point and training parameters related to a position/orientation of the camera when shooting the training images; generating, using the training parameters as inputs, a model that outputs a first displacement amount by which a target block corresponding to the target point displaces from a reference position in the training images; obtaining measurement images generated by the camera shooting the target point and measurement parameters related to the position/orientation of the camera when shooting the measurement images; obtaining a second displacement amount, output by inputting the measurement parameters into the model, by which a target block corresponding to the target point appearing in the measurement images displaces from a reference position in the measurement images; and outputting a displacement obtained by subtracting the second displacement amount from displacement of the target block in the measurement images.