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Weld image segmentation method

An image segmentation and image technology, applied in the field of image processing, can solve the problems of reduced image contrast, lack of image details, long running time, etc.

Inactive Publication Date: 2015-12-30
CETC NINGBO MARINE ELECTRONICS RES INST
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Problems solved by technology

However, due to the influence of arc light, spatter, etc., the details of the image become blurred and the image contrast is reduced. The traditional image segmentation method has disadvantages such as large amount of calculation, long running time, and lack of image details. The traditional method has been No longer works for segmentation of welding images

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Embodiment Construction

[0050] Attached below figure 1 The specific implementation manners of the present invention will be further described.

[0051] Step 1. Get the image;

[0052] The image acquisition system includes: an acA2500-14gm industrial camera from Basler, a PCIE-Gie64 image acquisition card from ADLINK, an industrial computer and on-site welding devices. The whole system uses an industrial computer as the main controller, and realizes the image acquisition of the circular saw blade through the embedded PCIE-Gie64 image acquisition card. The digital image to be transferred to the computer, so as to obtain the welding image such as figure 2 (a) shown.

[0053]Step 2. Preprocessing the image;

[0054] In order to suppress the influence of noise, the original image collected by the industrial camera is subjected to noise reduction processing. Smoothing filtering and image contrast enhancement are used for noise reduction processing to eliminate noise interference points, so that the i...

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Abstract

The invention discloses a weld image segmentation method. The weld image segmentation method comprises the steps of obtaining a weld image; preprocessing the image; determining the optimal segmentation threshold value; carrying out binaryzation on the optimal segmentation threshold value; outputting a segmentation result of the weld image. The method mainly solves the problem that weld image segmentation is disturbed by arc light, spatter and the like, on the basis of considering influence on the image segmentation effect from interclass variance and intraclass variance, variance information is used for replacing mean value information, target areas obtained through segmentation can be more complete, and details are more clear; meanwhile, operation time is effectively shortened, operation efficiency is improved, the method can be well used for segmenting the weld image, and the basis is provided for extracting weld defect features online and analyzing weld quality.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to image segmentation, in particular to a welding image segmentation method. The method is to segment the welding seam image from the whole welding image, which can be used in the field of welding quality online detection technology. Background technique [0002] Welding is widely used in modern industrial production, especially in the construction industry, shipbuilding industry and other fields is a very important process. Relevant statistics show that in the metal manufacturing industry, welding has become the third largest process after assembly and processing. In the past, people relied on human eyes to judge the quality of welding products, which required a lot of waste of manpower and financial resources, reduced production efficiency, and made it difficult to guarantee the quality of welding products. With the development of the times, people have put ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
CPCG06T7/0004G06T2207/10004G06T2207/30152
Inventor 齐继阳李金燕唐文献李钦奉苏世杰
Owner CETC NINGBO MARINE ELECTRONICS RES INST
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