| 阈值选取对黏土微结构参数的影响 |
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| 引用本文： | 李顺群,柴寿喜,王英红,高凌霞.阈值选取对黏土微结构参数的影响[J].解放军理工大学学报,2011,0(4):354-360. |
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| 作者姓名： | 李顺群 柴寿喜 王英红 高凌霞 |
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| 作者单位： | 1.天津城市建设学院, 天津 300384; 2.天津市软土特性与工程环境重点实验室, 天津 300384;
3.中国科学院 冻土工程国家重点实验室, 甘肃 兰州 730000; 4.大连民族学院 土木建筑工程学院, 辽宁 大连 116600 |
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| 基金项目： | 教育部科学技术研究重点资助项目（210004）;冻土工程国家重点实验室开放基金资助项目（SKLFSE200906）;天津市自然科学基金项目（11JCYBJC02900）. |
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| 摘 要： | 为了研究闲值选取对黏土微结构参数的影响,以天津黏土为例,分析了Leica QWin系统提取扫描电镜(SEM)照片信息过程中,阈值对微结构参数的影响.分析了在最大方差阈值条件下,SEM图像在展示同一样品不同观察点微结构特征时存在的差别.研究了分形维数、各向异性、颗粒长宽比、颗粒圆度、颗粒面积以及颗粒平均灰度等微结构参数随...
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| 关 键 词： | 微结构 SEM图像 阈值 灰度 |
| 收稿时间： | 2009-03-16 |
| 修稿时间： | 2009-03-16． |
Influence of grey threshold on microstructure for SEM photograph |
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| LI Shun-qun,CHAI Shou-xi,WANG Ying-hong and GAO Ling-xia.Influence of grey threshold on microstructure for SEM photograph[J].Journal of PLA University of Science and Technology(Natural Science Edition),2011,0(4):354-360. |
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| Authors: | LI Shun-qun CHAI Shou-xi WANG Ying-hong and GAO Ling-xia |
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| Institution: | 1. Tianjin Institute of Urban Construction, Tianjin 300384，China;
2.Tianjin Key Laboratory of Soft Soil Characteristics and Engineering Environment, Tianjin 300384, China;
3.State Key Laboratory of Frozen Soil Engineering, Chinese Academy of Sciences,Lanzhou 730000，China;
4.School of Civil and Architecture Engineering, Dalian Nationalities University, Dalian 116600,China |
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| Abstract: | Difference of grey distribution in different Scanning Electric Microscopy (SEM) photographs is frequently encountered due to such subjective reasons as inconsistent distance, inclination and metallic membrane of the observed points. The determining method of the grey threshold in Leica QWin system for SEM photographs was researched in the processing of a detailed case study on Tianjin's clay. The microstructure, implied by the three SEM photographs of different observing points in a small specimen, was explored in default threshold conditions. Along with the threshold change, the fractal dimension, the anisotropy, the aspect ratio,the roundness, the particle area, the mean grey and other microstructure parameters were also investigated. It is shown that the default threshold is not a constant for different observing points even for a specimen. Whereas, the anisotropy, the aspect ratio, the roundness, the particle area and the grey parameters are strongly influenced by the threshold magnitude. |
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| Keywords: | micro structure SEM photograph grey threshold grey level |
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