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An automatic system of classification of weld defects in radiographic images

机译:放射线图像中焊接缺陷的自动分类系统

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摘要

In this paper, we describe an automatic detection system to recognise welding defects in radiographic images. In a first stage, image processing techniques, including noise reduction, contrast enhancement, thresholding and labelling, were implemented to help in the recognition of weld regions and the detection of weld defects. In a second stage, a set of geometrical features which characterise the defect shape and orientation was proposed and extracted between defect candidates. In a third stage, an artificial neural network (ANN) for weld defect classification was used. With the aim of obtaining the best performance of ANN three different methods for improving network generalisation was used. The results was compared with a method without generalisation. For the input layer, the principal component analysis technique was used in order to reduce the number of feature variables; and, for the hidden layer, a different number of neurons was used.
机译:在本文中,我们描述了一种自动检测系统,用于识别射线照相图像中的焊接缺陷。在第一阶段,实施了图像处理技术,包括降噪,对比度增强,阈值处理和标记,以帮助识别焊接区域和检测焊接缺陷。在第二阶段中,提出了一组表征缺陷形状和方向的几何特征,并在候选缺陷之间进行提取。在第三阶段,使用人工神经网络(ANN)进行焊接缺陷分类。为了获得最佳的人工神经网络性能,使用了三种不同的方法来改善网络泛化。将结果与未进行概括的方法进行了比较。对于输入层,使用主成分分析技术以减少特征变量的数量。对于隐藏层,使用了不同数量的神经元。

著录项

  • 来源
    《NDT & E international》 |2009年第5期|467-476|共10页
  • 作者单位

    Departamento de Estructuras y Construction, Universidad Politecnica de Cartagena, Antiguo Cuartel de Antigones, Plaza del Hospital 1, 30202 Cartagena, Spain;

    Departamento de Electronica, Tecnologia de Computadoras y Proyectos, Universidad Politecnica de Cartagena, Antiguo Cuartel de Antigones, Plaza del Hospital 1, 30202 Cartagena, Spain;

    Departamento de Electronica, Tecnologia de Computadoras y Proyectos, Universidad Politecnica de Cartagena, Antiguo Cuartel de Antigones, Plaza del Hospital 1, 30202 Cartagena, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    weldment; X-rays; image processing; ANN; automated inspection;

    机译:焊件X射线图像处理;人工神经网络自动检查;

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