LIU Guoquan Department of Materials Science and Engineering
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University of Science and Technology Beijing
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100083
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China.
材料科学技术（英）
Quantitative analysis of populations having a geometric structure,which has developed into a special scientific subject called microstructology or stereology,is of great importance to the characterization and evaluation of microstructures and their evolution in various processes.This paper, besides a brief discussion on those topics such as the recent developments of computer assisted image analysis,mathematical morphology,and fractal analysis,will mainly focus on the scope,fundamen- tals,present status,and perspectives of classical stereology.Several case examples of its application to materials science will also be given.
关键词:
stereology
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杨云
,
郭芸
,
王秀峰
材料导报
以古瓷釉显微组织为例,利用显微图像各组元的灰度特性,运用数字图像技术中的图像滤波、图像分割、轮廓提取方法对显微组织图像进行预处理,获取瓷釉组元分离图.在系统构成的基础上,结合体视学方法,对显微组织体积密度(Vv)、表面积密度(Sv)等体视学参数进行计算机分析与测量,为研究陶瓷材料及陶瓷内在结构与外观关系提供了可靠的技术支持和数据基础.
关键词:
显微组织
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图像处理
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定量分析
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体视学
ZHAO Xinbing Zhejiang University
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Hangzhou
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China LCKEK Institut fur Metallkunde und Metallphysik der RWTH Aachen
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Germany Department of Materials Scicnce and Engineering
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Zhejiang Univer sity
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Hangzhou 310027
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China
金属学报(英文版)
Most of the available methods for the calculation of the three dimensional(3D)grain size dis- tribution functions(SDF)are based on the S model and lead a grave systematical error.The origin is the basic supposition of spherical grains in the S model,which does not correspond with the feature of real grains.A new model called A model is developed based on the hypothe- sis of polvhedral grains.The probability functions of the A model and the method to calculate the 3D SDFs using the A model are given in the present paper.The theoretical analyses and experimental tests have demonstrated that the A model reduces the systematical error radical- ly.It is nearly as simple as the so far used S model,but gives much better results in repro- ducing of 3D SDFs from the measured ID or 2D SDFs.
关键词:
grain size
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