Part surface defect detection method and system based on structured light image matching
A defect detection and structured light technology, used in optical testing flaws/defects, image enhancement, image analysis, etc., can solve problems such as poor image quality and poor robustness of parts inspection results, and achieve stable acquisition, system stability, and complex calculation. low degree of effect
Active Publication Date: 2021-12-07
DONGFENG MOTOR CORP HUBEI
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[0007] The embodiment of the present application provides a part surface defect detection method and system based on structured light image matching to solve the problem that in the related art, the image acquisition process is extremely vulnerable to environmental interference, which leads to poor image quality and ultimately leads to the robustness of part detection results. poor problem
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[0067] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.
[0068] The embodiment of the present application provides a part surface defect detection method based on structured light image matching to solve the problem that in the related art, the image acquisition process is extremely vulnerable to environmental interference, resulting in poor image quality, which ultimately leads to less robust...
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This application relates to a part surface defect detection method and system based on structured light image matching, including: acquiring a structured light image of the surface of the part to be detected; combining the structured light image of the surface of the part to be detected with the preset structured light image template of the surface of the reference part The concentrated structured light image templates are compared one by one, and the most similar structured light image template is selected; the pixel points of the structured light image on the surface of the part to be detected are compared with the corresponding pixel points of the most similar structured light image template. , to obtain the pixel difference image; segment the part of the pixel difference image that includes the suspected defect area, and process it to obtain a binary image; calculate the roundness of each suspected defect area in the binary image; compare the roundness with the preset value, if If it is less than the preset value, it is a scratch defect, otherwise, it is a point defect. The present application solves the problem in the related art that the process of image acquisition is easily disturbed by the environment, resulting in poor image quality and ultimately poor robustness of part detection results.
Description
technical field [0001] The present application relates to the technical field of parts detection, and in particular to a method and system for detecting surface defects of parts based on structured light image matching. Background technique [0002] Mechanical parts are widely used in all aspects of industrial production, especially in the field of automobile manufacturing. In the process of processing and manufacturing mechanical parts, it is necessary to strictly control product quality, analyze and record the quality results of parts and components, so as to facilitate subsequent improvement of production process, product quality and production efficiency. [0003] The traditional inspection method of mechanical parts products adopts manual inspection, which is still the inspection method adopted by most parts manufacturers so far. Manual inspection not only consumes man-hours and reduces the production efficiency of the assembly line, but also is labor-intensive and inc...
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IPC IPC(8): G01N21/88G06T7/00G06T7/11G06T7/136G06T7/155G06T5/40
CPCG01N21/8806G01N21/8851G01N2021/8832G01N2021/8854G01N2021/8887G06T5/40G06T7/0004G06T2207/30108G06T7/11G06T7/136G06T7/155
Inventor 史小平张宇探姚小婷赵奕铭徐欣奕
Owner DONGFENG MOTOR CORP HUBEI