A metal surface character defect detection method, system, device and storage medium
A metal surface, defect detection technology, applied in the field of image processing, can solve the problems of inaccurate results, matching failure, matching accuracy differences, etc.
Active Publication Date: 2022-03-22
GUANGZHOU UNIVERSITY
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Problems solved by technology
However, with the improvement of the character image resolution, the image matching time will increase, the matching accuracy will also vary, and even the matching failure will occur, resulting in low efficiency and inaccurate detection of character defects on the metal surface.
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[0055] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention. For the step numbers in the following embodiments, it is only set for the convenience of illustration and description, and the order between the steps is not limited in any way. The execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art sexual adjustment.
[0056] In the description of the present invention, multiple means two or more. If the first and the second are described only for the purpose of distinguishing technical features, it cannot be understood as indicating o...
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The invention discloses a metal surface character defect detection method, system, device and storage medium. The method includes: performing color space conversion on the metal surface image to be tested to obtain first image information, and performing global threshold segmentation processing to obtain second image information; Feature selection is performed on the second image information to obtain the first region, and then the first region is gray-scaled and then subjected to global threshold segmentation processing to obtain the second region; the second region is jointly expanded to obtain the third region, and the second region is processed Secondary feature selection to obtain the fourth area where the character is located; perform intersection processing on the third area and the fourth area to obtain the character image; determine whether there is a character offset defect according to the center point distance between the first area and the fourth area, according to The area of the character image determines whether there is a character overlapping defect or a character missing defect. The invention improves the efficiency of character defect detection while ensuring the accuracy, and can be widely used in the technical field of image processing.
Description
technical field [0001] The invention relates to the technical field of image processing, in particular to a metal surface character defect detection method, system, device and storage medium. Background technique [0002] The detection of metal surface defects is the most important step in its quality inspection process. With the development of society, the level of automation is getting higher and higher. The design and inspection of some precision instruments are relatively inefficient for manual identification. In order to ensure the detection of metal surface defects in the production process It is very important to develop a method for character detection on metal surfaces, and it is of great significance to automated production. [0003] In the prior art, the method of template matching is mostly used in the detection of character defects on the metal surface. The basic idea of template matching is to let the template do a translational movement in the target image,...
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IPC IPC(8): G06T7/00G06V10/24G06V10/40G06T3/40G06T5/00G06T7/136G06T5/30G06T7/90
CPCG06T7/0004G06T7/136G06T3/40G06T5/30G06T7/90G06T2207/10024G06T2207/30136G06T5/70
Inventor 谢宏威张浩黎鑫泽
Owner GUANGZHOU UNIVERSITY