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The colours of concrete as seen by X-rays and neutrons

机译:由X射线和中子看到的混凝土的颜色

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Both x-ray tomography and neutron tomography give very detailed insight in the microstructure of concrete. However, their different contrasts, due to different compositional sensitivities, make one modality more relevant for some features. The present study shows that both types of images acquired on the same specimen may be registered onto each other, after the statistical joint distribution of absorption coefficients has been learned. A Gaussian mixture model has been used to identify up to five different phases having different signatures. A staggered algorithm consisting in i) adjusting the joint histogram to fit phases and their variances and ii) registering the two 3D images onto each other, within a multi-scale algorithm is presented in details. The analysed experimental data illustrates the benefit of using jointly both modalities as compared to their parallel usage.
机译:X射线断层扫描和中子断层扫描均在混凝土的微观结构方面提供了非常详细的洞察力。 然而,由于不同的组成敏感性,它们不同的对比度,使一个模态更相关的一些特征。 本研究表明,在学习吸收系数的统计接口分布之后,可以在相同样本上获取的两种类型的图像。 高斯混合模型已被用于识别多达五个不同签名的不同阶段。 一种交错算法在I)中,在多尺度算法中调整与匹配阶段及其差异和II)的合适阶段及其差异和II)进行详细介绍。 分析的实验数据说明了与其平行使用相比使用共同模态的益处。

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