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Classification method for film defects

A classification method and a technology for thin film defects, which are applied in the direction of optical testing for flaws/defects, etc., can solve the problems of low detection efficiency, manpower and material resources, etc., and achieve the effects of improving accuracy, eliminating interference, and saving detection time

Active Publication Date: 2013-12-11
南京卓胜自动化设备有限公司
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Problems solved by technology

At present, the known defect detection methods mainly rely on human eyes for identification, which not only consumes manpower and material resources, but also has low detection efficiency

Method used

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  • Classification method for film defects
  • Classification method for film defects
  • Classification method for film defects

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Embodiment Construction

[0040] The film defect classification method includes an image preprocessing part and a detection part. The image preprocessing part includes (1) extracting a target area and (2) eliminating false boundaries; the detection part includes (3) defect classification detection.

[0041] Below in conjunction with accompanying drawing, these two parts are described:

[0042] Such as figure 1 shown

[0043] (1) Extract the target area

[0044] In addition to the complete product image, the image to be inspected by the high-speed linear array CCD camera also contains background areas with high-brightness grayscale features on both sides, such as figure 2 As shown, the white background area on both sides. According to the gray features of the background and foreground, an appropriate global threshold is selected to separate the background and obtain the target image. Since the gray feature of the perforated area is consistent with the background, the perforated area is also elimina...

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Abstract

The invention relates to a video image processing method, in particular relates to a classification method for film defects. The classification algorithm for defects comprises the following steps: (1) extracting a target area; (2) eliminating a pseudo boundary; and (3) carrying out classification and detection on the defects. The classification method can be used for identifying and distinguishing different defect types according to the surface characteristics of the defects, so as to realize the automation of detection and classification processes of the defects.

Description

technical field [0001] The invention relates to a video image processing method, in particular to a film defect classification method. Background technique [0002] According to the national standards of the People's Republic of China GB / T 24334-2009 (polyvinylidene chloride (PVDC) self-adhesive food packaging film), GBT 28117-2011 (multilayer co-extrusion film and bag for food packaging), GB / T 28118- 2011 (Plastic and Aluminum Foil Composite Films and Bags for Food Packaging) Requirements for the appearance quality of food packaging, the appearance of the packaging products used must not contain (or the unit area must not exceed the standard value) the following five types of defects: perforation, carbon spots, color wrinkles , folds, foreign bodies. At present, the known defect detection methods mainly rely on human eyes for recognition, which not only consumes manpower and material resources, but also has low detection efficiency. Contents of the invention [0003] Th...

Claims

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Application Information

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IPC IPC(8): G01N21/88
Inventor 徐明胡鑫成邹逸
Owner 南京卓胜自动化设备有限公司
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