Particle shape characterisation using Fourier descriptor analysis
Particle shape characterisation using Fourier descriptor analysis
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DOI：
10.1680/geot.2001.51.6.545
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发表时间：
2001
期刊：
影响因子：
5.8
通讯作者：
E. Bowman;K. Soga;W. Drummond
中科院分区：
文献类型：
--
作者：
E. Bowman;K. Soga;W. Drummond
提出了一种新的粒子形状客观评价方法。该技术使用傅里叶形状描述符和沙粒扫描电子显微镜照片的图像分析，以提供颗粒形态和纹理的精确量化。三个低阶傅立叶描述子，表示为“特征描述子”，提供了伸长率、三角形和正方形的度量，而另一个描述子，表示为“不对称”，提供了粒子不规则性的度量。这四种描述符一起量化了土壤颗粒的整体形状（定义为“形态”）。高阶描述符的总结提供了与局部粗糙度特征（定义为“纹理”）相关的纹理信息。介绍了三种硅砂（两种标准的实验室用砂和一种天然的未加工砂）和一种碳酸盐砂的研究结果。颗粒破碎对形态特征的影响因砂的类型而异。
A novel technique for the objective assessment of particle shape is presented. The technique uses Fourier shape descriptors and image analysis of scanning electron microscope photographs of sand grains to provide an accurate quantification of particle morphology and texture. Three lower order Fourier descriptors, denoted ‘signature descriptors’, provide measures of elongation, triangularity and squareness, while an additional descriptor, denoted ‘asymmetry’, provides a measure of particle irregularity. Together, these four descriptors quantify the overall shape of soil particles (defined as ‘morphology’). A summary of higher-order descriptors provides textural information that is related to local roughness features (defined as ‘texture’). The results of studies on three silica sands (two standard, laboratory-use and one natural, unprocessed) and one carbonate sand are presented. Breakage of particles by crushing is shown to affect the morphological signature differently depending on the type of sand, thou...