Displacement Detection Using Principal Component Analysis
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Solution Overview
Problem
Existing displacement detection methods fail to accurately capture overall displacement of objects from captured images, particularly in complex scenarios where geometric structure or dynamic characteristics are not readily available.
Innovation Solution
A displacement detecting apparatus comprising a detector, an extractor, and a calculator that analyzes spatial displacement over time across multiple measurement points, extracts characteristic displacement through principal component analysis, and calculates overall displacement, while correcting for noise and camera influences to provide accurate and comprehensive displacement data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If displacement is detected at multiple measurement points using captured images, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The object is divided into multiple measurement points distributed across its surface. Each measurement point independently tracks displacement, allowing comprehensive coverage of large or complex structures while maintaining manageable processing through modular point-by-point analysis
Solution Approach 2:
Characteristic displacement serves as an intermediary that synthesizes information from multiple measurement points. This intermediary representation captures essential displacement patterns while filtering noise, enabling accurate overall displacement calculation without requiring complex direct processing of all individual point data
2Measurement precision
If overall displacement is calculated from characteristic displacement, then measurement precision is improved, but loss of information increases
Solution Approach 1:
The system transforms raw displacement data from multiple measurement points into characteristic displacement through parameter transformation. This change in representation preserves essential displacement information while eliminating redundant and noisy components, enabling accurate overall displacement calculation
Data Source
AI summary
A displacement detecting apparatus includes: a detector which detects displacement, which is spatial displacement over time, of each of a plurality of measurement points which have been set on an object, using a plurality of images of the object captured at a plurality of time points; an extractor which extracts characteristic displacement specific to the object, based on the displacement detected by the detector; and a calculator which calculates overall displacement indicating displacement of the entirety of the object, from the characteristic displacement extracted by the extractor.