Surface Inspection Device Rotating Digital Images for Flaw Detection
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Solution Overview
Problem
Existing surface inspection methods struggle to detect flaws like dents efficiently, as they require extensive image processing time and are limited to detecting flaws along fixed detection directions, leading to reduced productivity.
Innovation Solution
A surface inspection device that rotates digital images of machined workpieces by predetermined angles while maintaining a fixed line detection direction, allowing for the extraction of lines along this direction from multiple rotations, and couples separated flaws to accurately determine the surface state, minimizing processing time and avoiding unnecessary line extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If lines are extracted along multiple directions to detect flaws extending in different directions, then the detection capability for flaws is improved, but the image processing time increases significantly
Solution Approach 1:
The patent applies dynamics by rotating the digital image at a predetermined angle and extracting lines along a fixed detection direction from the rotated image. This dynamic transformation allows the system to detect flaws extending in different directions without performing exhaustive multi-directional extraction, thereby reducing processing time while maintaining detection capability.
2Productivity
If a fixed detection direction is used for line extraction, then the processing time is reduced, but the ability to detect flaws extending in different directions is limited
Solution Approach 1:
The patent rotates the digital image at a predetermined angle and extracts lines along a fixed detection direction from the rotated image. This dynamic transformation allows the system to detect flaws extending in different directions without performing exhaustive multi-directional extraction, thereby reducing processing time while maintaining detection capability.
Solution Approach 2:
The patent introduces a rotational dimension by transforming the image at a predetermined angle before extraction. This dimensional change enables the fixed detection direction to effectively scan flaws oriented in different original directions, expanding detection coverage without increasing the extraction operation complexity.
3Measurement precision
If the digital image is rotated multiple times to extract lines from all directions, then the detection accuracy is improved, but the processing time increases
Solution Approach 1:
The patent rotates the digital image at a predetermined angle and extracts lines along a fixed detection direction from the rotated image. This dynamic transformation allows the system to detect flaws extending in different directions without performing exhaustive multi-directional extraction, thereby reducing processing time while maintaining detection capability.
Data Source
AI summary
A surface inspection device includes an image generator for generating a digital image achieved by imaging an inner surface of a bore which is subjected to a boring work, a line extraction processor for extracting a line along a horizontal direction set to a line extraction direction from the digital image, for determining the state of the inner surface of the bore based on the line extracted by the line extraction processor. The line extraction processor extracts lines along the line detection direction from respective digital images before and after rotation which are achieved by rotating the digital image once or over plural times every predetermined angle while the line extraction direction is fixed, and the estimating unit determines the state of the inner surface of the bore based on the lines extracted from the respective digital images before and after the rotation.