基于点光源X射线焊缝缺陷深度尺寸的测量

Measurement of Deep Sclae on Weld Defects based on Point X-Pay Source

介绍了一种焊缝X射线图像缺陷深度信息实时自动检测方法。由于要实时和自动 ,则只能用经影像增强器转换的实时X光成像系统 ,而不能用照片方式。又由于现场条件的限制 ,不可能用多幅图的投影合成法。本文介绍了一种仅用三幅图来获取深度信息的方法。区别于照片成像 ,光源已经不能看成平行光 ,文中分析了点光源成像的原理和方法。二维缺陷的准确检测是计算深度信息的基础 ,而准确的边缘检测又是检测二维缺陷的基础。由Marr开创 ,经Canny、Witken和Mallat等人发展起来的多尺度边缘检测被认为是理论上最完善的一种方法 ,但他们没有解决尺度自适应问题。本文介绍了一种基于测度的尺度自适应边缘检测方法 ,获得很好效果。

This paper presents a real-time automatic method of deep information detection.A real-time image system with X-ray image-intensifier is used for requirement of real-time and automation instead of X-ray film.Number of image is limited due to lass image space.Only three projection images are used for 3-D information detection in this method.The light resource can not be booked upon a parallel light resource that is different form X-ray filme image approach.An image principle and approach based on point light resource is introduced.The detection of 2-D defects is based on computation deep information and precise edge detction is based on 2-D defects detection.A multi scales edge detection method,which was created by Marr and developed by Canny,Wiken and Mallat,is a perfect method.However,they could not solve the scale adaptive problems.A multi-scale adaptive method based on image information measurement is introdusce in this paper.