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An immune-optimized active contour image segmentation method and its segmentation device

A technology of image segmentation and active contour, which is applied in image analysis, image enhancement, image data processing, etc. It can solve the problems of poor concave boundary processing effect and susceptibility to noise interference, so as to improve the phenomenon of noise sensitivity and robustness Sexuality, range-enhancing effects

Active Publication Date: 2019-08-06
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the classic active contour model has certain requirements on the initial contour, and the processing effect on the concave boundary is not good, and it is susceptible to noise interference, etc.

Method used

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  • An immune-optimized active contour image segmentation method and its segmentation device
  • An immune-optimized active contour image segmentation method and its segmentation device
  • An immune-optimized active contour image segmentation method and its segmentation device

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Embodiment 1

[0044] The X-ray welded joint defect segmentation method of the present invention can be set as an X-ray welded joint defect segmentation system, which includes an X-ray image acquisition module, a contour setting module, a welded joint defect segmentation module, and an immune-optimized active contour image segmentation device. Among them, the immune-optimized active contour image segmentation device includes a coding module, an initial antibody population generation module, an affinity calculation module, a selection module, an update times judgment module, an optimal antibody selection module, an antibody crossover module, an antibody variation module, the highest affinity The sum degree value is constant judgment module.

[0045] see figure 1 A method for segmenting defects in an X-ray welded joint includes the following steps.

[0046] 1. Obtain an X-ray image of the welded joint. This step is performed by the X-ray image acquisition module. In addition, Gaussian filter...

Embodiment 2

[0061] see figure 2 , the welding joint defect segmentation method of this embodiment includes the following steps

[0062] 1. Obtain an X-ray image of the welded joint.

[0063] After obtaining the X-ray image of the welded joint, Gaussian filtering can be used on the obtained X-ray image to reduce the image noise, and finally the pre-processed X-ray image of the welded joint with clearer target features is obtained, ready for subsequent welding Segmentation of joint defects.

[0064] 2. Set an initial contour v outside the target feature in the X-ray image 0 (s), v 0 (s)=[x 0 (s),y 0 (s)], s ∈ [0,1], x 0 (s) is the contour v 0 Set of x-axis coordinates of (s), y 0 (s) is the contour v 0 A collection of y-axis coordinates for (s).

[0065] 3. For the initial contour v 0 (s) Using the energy minimization principle of the active contour model to introduce constraint force and gradient force for multiple iterative contour evolution, the contour obtained by the final ...

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Abstract

The invention discloses an immune-optimized active contour image segmentation method and device. The method optimizes the gradient force weight and the normal force weight of the constraining force when an X-ray image is subjected to the welding joint defect segmentation by an active contour model, and comprises the steps of: combining the normal force weight k and the gradient force weight kG to be subjected to binary coding and used as an antibody, wherein a coding length is L; randomly generating r antibodies with coding length L as an initial antibody population according to the 0,1 characteristic of the binary code, and randomly selecting m antibodies as a memory bank, wherein r and m are positive integers, and r is greater than m; calculating the affinity of each antibody and the corresponding antigen, wherein the antigen refers to an energy function corresponding to the corresponding antibody; arranging the affinity in a descending order and selecting first m antibodies with the highest affinity and updating the memory bank; and using the antibody having the highest affinity in the memory bank as an optimal antibody.

Description

technical field [0001] The invention relates to an image segmentation method and a segmentation device thereof, in particular to an immune-optimized active contour image segmentation method and a segmentation device thereof. Background technique [0002] The defects of welded joints directly affect the life of welded products, and the use of X-rays to detect welded joints is an important means to ensure welding quality. At present, X-ray image analysis for industrial applications is mainly done manually. In some cases and work environments, the results of defect identification can be somewhat subjective. With the development of imaging technology, radioactive images are used image segmentation technology to realize the complete segmentation of welded joint defects, which lays the foundation for automatic detection of welded joint defects. [0003] The contour extraction of welded joint defects in X-ray images of welded joints is an important aspect of non-destructive testi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/12G06N3/12
CPCG06N3/126G06T2207/30152
Inventor 李晔吴志生刘翠荣
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY