| 基于CT无损扫描技术的冻土内部物质研究现状与分析 |
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| 引用本文： | 赵玥,韩巧玲,赵燕东,刘晋浩.基于CT无损扫描技术的冻土内部物质研究现状与分析[J].冰川冻土,2017,39(6):1307-1315. |
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| 作者姓名： | 赵玥 韩巧玲 赵燕东 刘晋浩 |
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| 作者单位： | 北京林业大学 工学院, 北京 100083 |
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| 基金项目： | 国家自然科学基金项目，中央高校基本科研业务费专项资金项目 |
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| 摘 要： | CT无损动态扫描技术在土壤领域的成功应用，为冻土内部结构及变化的定量化研究提供了有效手段。通过总结和分析现有关于冻土的基于CT断层扫描图像的研究成果，阐明CT扫描技术在冻土研究中的4个关键环节，即冻土样本的制备、冻土CT图像的获取、冻土CT图像处理及分析，并指出在现有CT技术条件下冻土研究中存在的问题，针对性提出了将先进的图像处理技术与高效的图像分析手段和冻土研究相结合的解决方案，为冻土内部结构的定量研究与分析提供技术指导，进而为CT无损动态扫描技术在冻土领域的广泛应用奠定基础。
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| 关 键 词： | CT扫描技术 冻土 图像处理 图像分析 |
| 收稿时间： | 2017-05-22 |
| 修稿时间： | 2017-11-28 |
The research status and analysis of frozen soil interior materials based on CT nondestructive scanning technology |
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| ZHAO Yue,HAN Qiaoling,ZHAO Yandong,LIU Jinhao.The research status and analysis of frozen soil interior materials based on CT nondestructive scanning technology[J].Journal of Glaciology and Geocryology,2017,39(6):1307-1315. |
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| Authors: | ZHAO Yue HAN Qiaoling ZHAO Yandong LIU Jinhao |
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| Institution: | School of Technology, Beijing Forestry University, Beijing 100083, China |
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| Abstract: | Computed tomography ( CT) is a wide-used technology of nondestructive dynamic scanning in medi-cal science, which can scan the samples without disturbing the internal structures, and has been successfully applied in soil science as an effective mean for quantifying the internal structures and change of frozen soil. In this article, the achievements about frozen soil research are summarized and four key links involved in frozen soil research are introduced based on computed tomography scanning technology. They were preparation of frozen soil specimen, computed tomography image acquisition, computed tomography image processing and comprehen-sive analysis of frozen soil computed tomography image. In the first key kink, it is illustrated how to obtain the frozen soil specimen and has listed all the equipment used for freezing soil involved in the experiment. The aim of this link is to offer the scan specimen for the subsequent computed tomography image acquisition. The second key link is to state the principle of the computed tomography images and the development of the computed tomo-graphy machine, especially accounting for the advantages about the new generation of the computed tomography machine. In the third key link, three procedures of computed tomography image processing are mainly stated, which are computed tomography image preprocessing, computed tomography image enhancement and computed tomography image segmentation, respectively. The step of computed tomography image preprocessing offers available and manageable image for the experiment. Then, the step of computed tomography image enhancement improves image quality and supplies abundant information. At last, the purpose of computed tomography image segmentation is to divide the image into several unique area and extract the target of interest. In a word, the tech-nology of computed tomography image processing aims at providing ideal image for the next technology, and the effect of it has a great influence on the experimental results. The last key link is the analysis about the computed tomography image of frozen soil, which offers effective internal information. Finally, on the basis of the above summary, three problems are found in the computed tomography technology in current research condition of fro-zen soils. The first one is the limit of computed tomography machine. There are five disadvantages about the computed tomography machine, they are cost, calibration, hardware and machine performances about gray reso-lution and density resolution. The development of computed tomography would be a great challenge, so it is nec-essary especially to illustrate the technical problems in the computed tomography image processing and combine with frozen soil science. The possible methods are put forward in order to solve the key issues above, which require the integration of advanced image processing technology and efficient image analysis into the frozen soil research. Images are presented through the method of image enhancement and image segmentation to prove the feasibility of this method. Theoretical and technical guidance are provided for the recognition and quantification of frozen soil and a foundation has been laid for wide application of computed tomography technology in the fur-ther research of frozen soil. |
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| Keywords: | computed tomography scanning technology( CT) frozen soil image processing image analysis |
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