Moiré Pattern Image Area Extraction for Distant Deformation Measurement
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Solution Overview
Problem
Current methods for detecting deformation in objects, such as buildings, are prone to measurement errors and require close proximity to the object, necessitating a more accurate and distant deformation measurement technique.
Innovation Solution
An image area extracting method that identifies a non-fixing area within a moiré pattern generated by overlapping layers with different patterns and adhesive forces, allowing for the extraction of specific image areas from images of sheets with moiré patterns, enabling deformation detection without physical proximity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement is performed using a distortion gauge or ruler, then measurement can be conducted close to the object, but measurement errors increase due to human factors and close proximity requirements
Solution Approach 1:
The patent replaces manual mechanical measurement tools (distortion gauges and rulers) with an optical imaging system that captures images from a distance. The imaging device photographs the object containing the sheet, and image processing automatically measures deformation by analyzing the sheet's pattern, eliminating the need for physical contact and human measurement operations.
Solution Approach 2:
The patent creates a visual copy of the object's surface by imaging it with a camera. Instead of directly measuring the physical object, the system captures an image of the sheet attached to the object and performs all measurements on this optical copy, allowing distance measurement without physical proximity.
2Reliability
If measurement is performed close to the object using distortion gauges or rulers, then direct contact measurement is possible, but measurement errors increase and the process becomes more complex
Solution Approach 1:
The patent replaces complex mechanical measurement systems with a simplified optical imaging system. Instead of using distortion gauges or rulers that require careful positioning and reading, the system uses an imaging device to photograph the object and automatically processes the image to extract deformation data, reducing both physical complexity and human error.
3Measurement precision
If a sheet with moiré pattern is used for deformation detection, then distant measurement capability is achieved, but extraction of specific measurement areas from the moiré pattern becomes complex
Solution Approach 1:
The patent divides the moiré pattern image into multiple candidate areas based on adhesive section information. The image processing device identifies different regions in the image and selects only those areas containing actual moiré patterns for measurement, eliminating the need to analyze the entire image and reducing computational complexity.
Solution Approach 2:
The patent uses adhesive section information as an intermediary to locate and extract the relevant moiré measurement areas. By first identifying where adhesive sections are positioned in the image, the system can then efficiently extract the corresponding moiré patterns, simplifying the overall extraction process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate and distant detection of deformations by extracting the non-fixing area from moiré patterns, improving measurement precision and reducing measurement errors.
Implementation Method 1
a moiré area where a moiré is generated by overlapping the first pattern and the second pattern
Data Source
AI summary
Problem: To extract an image including a desired area included in a moire area from an image in which a sheet that includes the moire area has been imaged. An image area extracting device 1 extracts an image area from an image in which a sheet has been imaged provided with a first layer section having a first pattern including a plurality of drawn lines extending in a first direction, a second layer section overlapping the first layer section and including a plurality of drawn lines extending in a second direction that is different from the first direction, and a low adhesion section where adhesive force is lower than that of an adhesive section and an adhesion section arranged on an adhesive surface opposite a surface facing the first layer section and the second layer section. At this time, the image area extracting device 1 executes processing that includes acquiring sheet image data showing a sheet image including a sheet imaged so as to include a moire area where a moire is created by overlaying the first pattern and the second pattern is acquired, extracting the moire area from the sheet image, extracting a non-fixing area where the low adhesion section is arranged based on a size of a fixing area where the adhesion section is arranged, and outputting non-fixing area image data showing a non-fixing area image including the non-fixing area.