Method and system for automatically extracting defect area of X-ray image of automobile hub

A technology for automatic area extraction and car hubs, which is applied in image enhancement, image analysis, image data processing, etc., and can solve the problems of cumbersome extraction methods, low accuracy, and large amount of calculations

Pending Publication Date: 2021-01-29
ZHONGBEI UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and system for automatically extracting defect areas of X-ray images of automobile wheels to solve the problems of cumbersome operation, large amount of computation and low accuracy in the existing defect area extraction methods

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  • Method and system for automatically extracting defect area of X-ray image of automobile hub
  • Method and system for automatically extracting defect area of X-ray image of automobile hub
  • Method and system for automatically extracting defect area of X-ray image of automobile hub

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Embodiment Construction

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0052] The purpose of the present invention is to provide a method and system for automatically extracting defect areas of X-ray images of automobile hubs, so as to solve the problems of cumbersome operation, large amount of computation, and low accuracy in the existing defect area extraction methods.

[0053] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described...

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Abstract

The invention discloses a method and a system for automatically extracting a defect area of an X-ray image of an automobile hub. The method comprises the steps: firstly, obtaining an X-ray image of anautomobile hub, and constructing structural elements; carrying out top-hat transformation and top-hat reconstruction transformation on the X-ray image, and carrying out expansion reconstruction operation by taking a top-hat reconstruction transformation result as a mark and a top-hat transformation result as a template; performing binarization processing on the expansion reconstruction result toobtain a preliminary defect area of the hub; performing feature elimination on the preliminary defect area to obtain a real defect area of the hub; and obtaining the minimum enclosing rectangle of thereal defect area, namely the defect area of the hub X-ray image. When the method is used for extracting the defect area of the hub, an operator does not need to specify an interested area in advance,the defect area can be directly and automatically determined on the X-ray image of the detected hub, the method and system are not influenced by links such as wheel type recognition and an area tracking matching algorithm, and the extraction efficiency and accuracy of the defect area can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of wheel hub defect detection, in particular to a method and system for automatically extracting defect regions of an X-ray image of an automobile wheel hub. Background technique [0002] As an important stress-bearing part of a car, the wheel hub is generally produced by melting the molten alloy through low-pressure casting, T6 heat treatment and machining processes, and finally becomes a finished product. During the production process of automobile wheels, affected by various factors, common internal defects such as air holes, shrinkage cavities or shrinkage porosity may occur, and X-ray non-destructive testing equipment must be used for flaw detection. [0003] During the X-ray inspection of the automobile wheel, the radiation emitted by the ray source penetrates the detection part and is received by the flat panel detector, which is converted into a digital image and transmitted to the computer. By analy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T5/30G06T7/11
CPCG06T5/30G06T7/0006G06T2207/10116G06T2207/20036G06T7/11
Inventor 王明泉张俊生侯慧玲阙禄松王陶然
Owner ZHONGBEI UNIV
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