Texture orientation and anisotropy calculation by fourier transform and Principal Component Analysis
Texture orientation and anisotropy calculation by fourier transform and Principal Component Analysis
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DOI：
10.1016/j.ymssp.2004.07.005
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发表时间：
2005-09
影响因子：
8.4
通讯作者：
B. Josso;D. Burton;M. Lalor
中科院分区：
文献类型：
--
作者：
B. Josso;D. Burton;M. Lalor
本文提出了一种计算织构取向角和各向异性度的简单方法。该算法的原理是首先计算图像的傅里叶变换模，然后用主成分分析法计算该谱在零频率附近的分布。该算法返回方向角和置信度指数。该指数从0%到100%，并指示纹理是否定向，即各向异性。该算法适用于不同的加工工艺获得的表面纹理的表征。因此，它表明，该方法给出的各向异性程度可以成功地应用作为表面纹理的表征参数。
This paper proposes a simple method to calculate a texture angle of orientation and degree of anisotropy. The principle of the algorithm is first to calculate the image Fourier transform modulus and then to characterise the distribution of this spectrum around the zero frequencies by Principal Component Analysis. The algorithm returns both the angle of orientation and an index of confidence. This index runs from 0% to 100% and indicates whether the texture is oriented, i.e. anisotropic, or not. This algorithm is applied to the characterisation of surface textures obtained by different machining processes. Hence, it is shown that the degree of anisotropy given by this method can be successfully applied as a characterisation parameter for surface textures.