MACHINE MODELING AND SIMULATIONS, Machine modeling and simulations 2020

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DETERMINATION OF VOLUME POROSITY OF POROUS MATERIALS BASED ON CT HISTOGRAMS
Zbigniew Szczepański, Mieczysław Cieszko

Last modified: 03. 07. 2020

Abstract


The new method is proposed in the paper for determination of the volume porosity of porous materials based on the histograms of 3D µCT scans. In this method the normed histogram is considered as a probability distribution of relative mass density occurrence in µCT image of sample of porous material. It is considered as a linear combination of two distributions characterizing frequency of occurrence of pore and skeleton types of voxels with different densities in the scan of the sample. The porosity in the proposed model defines the frequency (probability) of voxel occurrence of the pore type, in the whole set of voxels in the sample scan. Such approach makes possible determination of volume porosity directly from the scan of bone sample without necessity of earlier reconstruction of its microscopic pore geometry. It allows also precise definition of the threshold value of relative density preserving calculated volume porosity during the reconstruction of the binary image of sample. This method has been applied for determination of the porosity parameter and binarization thresholds of samples of various materials and for reconstruction of their 3D pore space structure.