Crown cap surface defect online detection method based on image processing

A technology of image processing and detection methods, applied in the field of image processing, can solve the problems of detection and classification of multi-type defects on the surface of crown caps

Active Publication Date: 2019-09-10
JIANGSU POLYTECHNIC COLLEGE OF AGRI & FORESTRY
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Problems solved by technology

[0006] Purpose of the invention: The purpose of the present invention is to provide an online detection method for surface defects of crown caps based on image processing, which solves the problem of detection and classification of multiple types of defects on the surface of crown caps

Method used

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  • Crown cap surface defect online detection method based on image processing
  • Crown cap surface defect online detection method based on image processing
  • Crown cap surface defect online detection method based on image processing

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Embodiment Construction

[0080] In order to better understand the content of the patent of the present invention, the technical solution of the present invention will be further described below in conjunction with the drawings and specific embodiments.

[0081] Such as figure 1 As shown, the surface defect detection process of the crown cover includes two parts: inner surface inspection and outer surface inspection. The inner surface inspection includes inner surface image acquisition, area center positioning and black spots, flash lack of glue, inner and outer ring bubbles, sticky materials, skirt teeth Detection of defect types such as deformity and missing. The external surface detection includes external surface image acquisition, regional center positioning and pattern missing, wrong image and other defect types detection. The internal and external surface defect detection is divided into two stations at the same time, and each has independent image acquisition. and processing system, a method fo...

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Abstract

The invention discloses a crown cap surface defect online detection method based on image processing, and belongs to the technical field of image processing. The method comprises the following steps:acquiring a crown cap inner surface image, and implementing central positioning and region extraction by using an image segmentation technology; implementing bottle cap inner surface defect detectionby using image processing algorithms such as threshold segmentation, morphological processing, connected region feature analysis and region comparison; establishing a crown cap outer surface pattern template offline by adopting an automatic training learning algorithm; and acquiring a crown cap outer surface image, and finishing bottle cap outer surface defect detection by using feature template matching, affine transformation and regional comparison. The method can be used for rapidly detecting various crown cap surface defects online, can detect 300 bottle caps in one minute, has the advantages of high defect detection accuracy, high robustness and the like, and can be attached to a crown cap production line to realize defect detection and type differentiation of crown caps.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to an image processing-based online detection method for crown cap surface defects. Background technique [0002] With the rapid development of my country's intelligent manufacturing industry, machine vision and image processing technology has become one of the main means of product post-process inspection. Crown caps are widely used in industries such as glass bottles of beer and carbonated beverages because of their good sealing performance. According to statistics, the market demand for crown caps in my country has been 47 billion since 2008, and has increased by 2 billion per year, which has greatly stimulated the efficiency of bottle cap production and testing. As the world's largest crown cap demand market, improving the defect detection level of crown caps is of great significance to the development of my country's crown caps industry. [0003] Since th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/95
CPCG01N21/95
Inventor 崔明仲瑶吴燕
Owner JIANGSU POLYTECHNIC COLLEGE OF AGRI & FORESTRY
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