Structure Management Device for Consistent 3D Damage Mapping
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Solution Overview
Problem
Existing structure management techniques using three-dimensional design data suffer from image quality deterioration and inconsistency in polygon generation, making it difficult to compare inspection results over time.
Innovation Solution
A structure management device and method that acquires images with overlap areas using a camera-equipped moving object, detects damage, and maps it onto three-dimensional design data using combined information calculated from feature points, ensuring precise camera position and posture, thereby maintaining image quality and enabling easy comparison with past inspections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If captured images are mapped on generated polygons for each inspection, then the inspection process can be automated, but the polygon shapes differ between inspections causing inconsistency in comparison
Solution Approach 1:
The patent applies preliminary action by pre-generating a standard polygon model from design data before inspections begin. This standard polygon serves as a consistent reference framework that is reused across all inspections, eliminating the need to regenerate polygons for each inspection while maintaining automation benefits.
2Shape
If captured images are attached to each polygon surface, then three-dimensional visualization is achieved, but image quality deteriorates due to low precision of randomly generated polygons
Solution Approach 1:
The patent uses copying by mapping captured images onto a high-precision standard polygon model that is copied from design data rather than generating new low-precision polygons for each inspection. This ensures that images are always mapped onto a consistent, high-quality geometric framework, preserving image quality while achieving three-dimensional visualization.
3Productivity
If different polygons are generated for each captured image acquisition, then the inspection can be performed independently each time, but comparison with past inspection results becomes difficult
Solution Approach 1:
The patent applies universality by creating a universal standard polygon model that serves multiple functions: it provides the geometric framework for three-dimensional visualization, serves as a consistent reference for mapping captured images across different inspections, and enables accurate comparison of inspection results over time. This single universal model replaces the need for separate polygons for each inspection.
Data Source
AI summary
Provided are a structure management device, a structure management method, and a structure management program capable of suppressing deterioration of image quality of a mapped captured image and easily performing comparison with past inspection result.A structure management device includes an image acquiring unit (401) that acquires an image group, a damage detecting unit (403) that analyzes images in the image group to detect damage of the structure, a three-dimensional design data acquiring unit (407) that acquires three-dimensional design data indicating the structure, a combined information calculating unit (409) that tracks point group data of feature points common in the overlap area between the images in the image group to calculate combined information including a camera position and a camera posture in a case of capturing the image by the camera and a three-dimensional position of the point group data, and a mapping unit (411) that maps the detected damage on a surface of the structure indicated by the acquired three-dimensional design data based on the combined information calculated by the combined information calculating unit.