Description of Ore Particles from X-Ray Microtomography (XMT) Images, Supported by Scanning Electron Microscope (SEM)-Based Image Analysis

Description of Ore Particles from X-Ray Microtomography (XMT) Images, Supported by Scanning Electron Microscope (SEM)-Based Image Analysis
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基于扫描电子显微镜 (SEM) 图像分析的 X 射线显微断层扫描 (XMT) 图像对矿石颗粒的描述

DOI:
10.1017/s1431927618015076
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发表时间:
2018
影响因子:
2.8
通讯作者:
Schmidt
Schmidt
中科院分区:
工程技术4区
文献类型:
--
作者:
Leissner;Ditscherlein;Sedivy;Bachmann;Gutzmer;Peuker;Schmidt

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在本文中,三维(3D)图像数据的矿石颗粒系统进行了研究。通过结合X射线显微断层摄影术和扫描电子显微镜(SEM)的图像分析,可以从某些平面切片中获得有关矿物成分的额外信息。对于粒子系统的层析图像分析,单个粒子的提取是必不可少的。这是执行基于标记的分水岭算法和后处理步骤,利用神经网络,以减少过度分割。通过将3D颗粒状分割经验地与2D SEM图像进行比较来验证结果,所述2D SEM图像是用不同的成像过程和分割算法获得的。最后,体视学的应用程序,其中平面SEM图像被嵌入到断层扫描的3D图像。这允许在整个断层图像中估计作为材料特定量的局部X射线衰减系数。
In this paper, three-dimensional (3D) image data of ore particle systems is investigated. By combining X-ray microtomography with scanning electron microscope (SEM)-based image analysis, additional information about the mineralogical composition from certain planar sections can be gained. For the analysis of tomographic images of particle systems the extraction of single particles is essential. This is performed with a marker-based watershed algorithm and a post-processing step utilizing a neural network to reduce oversegmentation. The results are validated by comparing the 3D particle-wise segmentation empirically with 2D SEM images, which have been obtained with a different imaging process and segmentation algorithm. Finally, a stereological application is shown, in which planar SEM images are embedded into the tomographic 3D image. This allows the estimation of local X-ray attenuation coefficients, which are material-specific quantities, in the entire tomographic image.
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