Kootahi, Karim and Kwan Leung, Anthony and Jiang, Zhenliang and Liu, Jianbin and Qi, Rui and Lourenço, Sérgio D.N. and Lai, Zhengshou and Gao, Zhiwei (2024) Evaluation of the methods of particle morphology characterization: CT scanning, digital imaging and light microscopy. Computers and Geotechnics, 174: 106648. ISSN 0266-352X
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The morphology of granular materials can be characterized using different measurement techniques. This study evaluated the efficacy of four dynamic image analysis devices and a light microscope with reference to micro-computed tomography results.AI Topics:
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The morphology of granular materials can be characterized two or three-dimensionally by different measurement techniques such as micro-computed tomography (μCT), static and dynamic image analysis (SIA and DIA). Because there are fundamental differences in the working principles among these techniques, their efficacy in characterizing the morphology of granular particles needs to be precisely examined but has not yet been scientifically evaluated. In this study, a systematic evaluation of the efficacy of four DIA devices and a light microscope (LM) with reference to μCT was made by selecting statistically representative samples of three standard sands which covered a wide range of particle form and angularity. Morphological data of these sands were used and probability distributions obtained from the different imaging techniques were compared with μCT results using a precise quantitative measure based on the information theory. The results revealed that most of the DIA devices chosen were capable of providing accurate measurements for the coarse descriptors such as aspect ratio in sands across a broad particle size range, whereas some devices require improvement in their camera resolution to produce accurate measurements for fine sands. Modifying device configuration and/or computational algorithm to either use the captured image with the largest area or obtain an average from multiple random projections in the order of 100 can improve the accuracy of morphology characterization in DIA devices. LM with proper imaging and image processing can provide results comparable to μCT.
Title | Evaluation of the methods of particle morphology characterization: CT scanning, digital imaging and light microscopy |
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Creators | Kootahi, Karim and Kwan Leung, Anthony and Jiang, Zhenliang and Liu, Jianbin and Qi, Rui and Lourenço, Sérgio D.N. and Lai, Zhengshou and Gao, Zhiwei |
Identification Number | 10.1016/j.compgeo.2024.106648 |
Date | October 2024 |
Divisions | College of Science and Engineering > School of Engineering > Infrastructure and Environment |
Publisher | Elsevier |
Additional Information | This work was supported by the General Research Fund #C6006-20G and #16207521 funded by the Hong Kong Research Grant Council and grant no. 51922112 provided by the National Natural Science Foundation of China. |
URI | https://pub.demo35.eprints-hosting.org/id/eprint/140 |
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Item Type | Article |
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Depositing User | Unnamed user with email ejo1f20@soton.ac.uk |
Date Deposited | 11 Jun 2025 16:35 |
Revision | 21 |
Last Modified | 12 Jun 2025 11:32 |
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