利用MATLAB软件实现赤铁矿絮凝体SEM图像的三维重建  

Three-dimensional reconstruction of SEM image of hematite flocs by MATLAB software

作　　者：牛福生 张红梅[1] 张晋霞 NIU Fusheng;ZHANG Hongmei;ZHANG Jinxia(College of Mining Engineering,North China University of Science and Technology,Tangshan 063210,China;Hebei Key Laboratory of Mineral Development and Security Technology,Tangshan 063210,China)

机构地区：[1]华北理工大学矿业工程学院,河北唐山063210 [2]河北省矿业开发与安全技术重点实验室,河北唐山063210

出　　处：《中国矿业》2021年第11期62-67,共6页China Mining Magazine

基　　金：国家自然科学基金项目资助(编号:51874135)。

摘　　要：赤铁矿絮凝体SEM图像的三维重建是观察絮凝体内部结构的重要方法,对于研究絮凝体的絮凝效果具有重要的作用。通过冷冻真空干燥法对絮凝体试样进行处理,并利用扫描电镜获取了赤铁矿絮凝体的SEM图像,利用MATLAB软件对试验获取的赤铁矿絮凝体SEM图像首先进行预处理,降低无关因素对图像的影响,为后续三维重建奠定了基础,并通过对三维数据的提取,三维显示效果的设置等,实现了赤铁矿絮凝体SEM图像的三维重建。结果表明:重建后的三维图像具有比较好的立体显示效果,可以更加直观地观测出颗粒和孔隙的起伏程度,图像中凸起部分是颗粒,下凹部分是孔隙,颗粒集中于图像的中央,孔隙分布在颗粒中间和图像的边缘。重建后的三维图像,为后续研究絮凝体的三维孔隙率和三维分形维数提供了重要的依据。Three-dimensional SEM image reconstruction of hematite flocculates is an important method to observe the internal structure of flocculates and plays an important role in studying the flocculation effect of flocculates.The flocculates are processed by freeze vacuum drying method,and SEM images of hematite flocculates are obtained by scanning electron microscopy(SEM).MATLAB software is used to preprocess the SEM image of hematite flocculate obtained in the experiment to reduce the influence of irrelevant factors on the image and lay a foundation for subsequent three-dimensional reconstruction.By extracting three-dimensional data and setting three-dimensional display effect,three-dimensional reconstruction of the SEM image of hematite flocculate is realized.The results show that the reconstructed three-dimensional image has a better stereoscopic display effect,and the undulation degree of particles and pores can be observed more intuitively.In the image,the raised part is the particle,while the concave part is the pore.The particle is concentrated in the center of the image,and the pore is distributed in the middle of the particle and the edge of the image.The reconstructed three-dimensional image provides an important basis for the subsequent study of three-dimensional porosity and three-dimensional fractal dimension of flocs.

关 键 词：赤铁矿 絮凝体 SEM图像 图像处理 三维重建 

分 类 号：TD91[矿业工程—选矿]