Abstract:

Taking the microstructure of secondary short circuit inelectrical fire for example, this paper introduced how to utilize the gray-scale characteristics of constituent elements in microscopicimages with digital image technologies,such as image filtering, image segmentation and contour extraction, to preprocess the miclostructure images and then get the separation figures of the lattice and holes. Based on the system composition and the stereoscopy method, the microstructure wolume density, the suface area density and other stereology parameters were measured and analyzed bythe computer. This study provides the reliable technical support and basic data for the research of the relationship between thessecondary short circuit microstructure and the melted trace property.

Key words: secondary short circuit, metallographic analysis, digital image

摘要：

以电气火灾二次短路显微组织为例，利用显微图像各组元的灰度特性，运用数字图像技术中的图像滤波、图像分割、轮廓提取方法对显微组织图像进行预处理，获取晶格和孔洞的分离图。结合体视学方法，对显微组织晶格粒径、孔洞大小等几何特征参数进行计算机分析与测量，探讨数字图像技术辅助二次短路熔痕金相组织进行定量分析技术方法。

关键词: 二次短路, 金相分析, 数字图像