Interactive extraction method and system for defect area of automobile hub X-ray image

Abstract

The invention discloses an interactive extraction method and system for a defect area of an X-ray image of an automobile hub. The method comprises the following steps: firstly, acquiring an X-ray image of an automobile hub and a minimum enclosing rectangle of a mark area on the image; constructing structural elements according to the minimum bounding rectangle; carrying out top-hat transformationand top-hat reconstruction transformation on the X-ray image by adopting structural elements, carrying out expansion reconstruction operation of mathematical morphology according to a transformation result, and carrying out binarization processing on an obtained expansion reconstruction operation result; and analyzing the binarization processing result to obtain a defect area to be extracted. By adopting the defect area interactive extraction method provided by the invention, rapid and accurate separation of the whole defect area can be achieved as long as an operator randomly marks the defectposition by using a mouse, so that the speed and the efficiency of quantitative analysis of defects by detection personnel are greatly improved, and the method and system have the advantages of simplicity and convenience in operation and accuracy in identification.

Description

technical field [0001] The invention relates to the technical field of wheel hub defect detection, in particular to a method and system for interactively extracting defect areas of X-ray images of automobile wheel hubs. 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 analyzing t...

AI Technical Summary

Problems solved by technology

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

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