3D Image Damage Measurement With Patch-Based Tilt Correction
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Solution Overview
Problem
Existing image processing techniques for detecting and measuring damage on structures require detailed measurements of position and angle, necessitating significant labor and are inefficient.
Innovation Solution
An image processing apparatus and method that utilizes a processor to acquire multiple images from overlapping viewpoints, generate three-dimensional point group data, create a patch model, select appropriate images for measurement, and correct measurement results using camera and normal vector angles to achieve accurate damage size measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If detailed angle and position measurements are performed to correct measurement results, then measurement precision is improved, but device complexity and labor requirements increase
Solution Approach 1:
The patent uses a camera to capture images of the damage, creating a visual copy of the damage area. This image copy is then processed to extract measurement information, eliminating the need for complex physical measurement devices and angle/position measurement equipment. The image serves as a substitute for direct physical measurement.
Solution Approach 2:
The patent replaces mechanical measurement systems (such as physical protractors, angle sensors, and position measurement devices) with an optical system (camera) and computational processing. The measurement is performed through image analysis and mathematical calculations rather than mechanical measurement tools.
2Measurement precision
If detailed angle and position measurements are performed to correct measurement results, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent performs preliminary action by capturing multiple images of the damage from different angles and positions before the actual measurement process. These pre-captured images contain all the necessary information for measurement, eliminating the need for time-consuming on-site angle and position measurements during the measurement phase.
Solution Approach 2:
By creating image copies of the damage from multiple viewpoints, the system captures all necessary measurement information in advance. The subsequent processing of these image copies is computationally efficient and does not require time-consuming physical measurements.
3Measurement precision
If multiple images from overlapping viewpoints are acquired and processed through three-dimensional modeling, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent transitions from two-dimensional image data to three-dimensional spatial understanding by generating a three-dimensional point group model from multiple images. This dimensional transformation enables accurate measurement of damage size and shape by reconstructing the damage geometry in 3D space, providing precise measurements without complex physical measurement devices.
Data Source
AI summary
The image processing apparatus executes: processing of acquiring a plurality of images of a subject captured with overlapping imaging ranges from a plurality of viewpoints; processing of detecting damage to a surface of the subject from the acquired plurality of images; processing of generating three-dimensional point group data of feature points; processing of generating a three-dimensional patch model of the subject on the basis of the generated point group data; processing of selecting an image corresponding to each patch of the three-dimensional patch model from the acquired plurality of images; processing of measuring a size of the damage in a region corresponding to the patch in the selected image; processing of generating correction information necessary for correcting a measurement result of the size of the damage; and processing of correcting the measurement result of the size of the damage on the basis of the generated correction information.