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Characterization and identification of woods by the Fourier transform image analysis

通过傅里叶变换图像分析表征和识别木材

基本信息

批准号：
04454089
负责人：
FUJITA Minoru
金额：
$ 4.29万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04454089/
关键词：
power spectrum wood identification characterization of tracheid arrangement dot-mapping method FFT and polar analysis characterization of vessel arrangement Fourier transform image analysis characterization of fiber arrangement FFTと極座標解析 /

项目摘要

In the application of the Fourier transfrom on wood structures, some Pre-FFT and Post-FFT procedures such as the dot mapping method and also the polar coordinate analysis of power spectral patterns were improved, so the Fourier transform image analyzing system was accomplished in the practical level. This new system was proved to be very effective on the both fields of wood identification and wood quality. Result obtained are as follows.(1)Distribution of tracheids and wood fibers of fifty species of major Japanese woods were offered to the analysis, and collected thier power spectral patterns. They were evaluated mathematically on the angular and frequency distribution functions, not to say nothing of visual judgment of power spectral patterns. Tracheids and fibers were shown to arrange thier peculiar distribution, being related to each wood species. Numerical characters obtained by the polar coordinate analysis will be used on the wood identification and wood quality.(2)When vessel distribution of 33 hardwoods were analyzed, many and very impressible characters were obtained and could be related to each species. And more, unexpectable informations on ray and axial parenchyma were brought by the negative distribution of vessels and fibers.In addition to the above result, three-dimensional analysis on wood structure was challenged in combined with the Fourier tranform image analyzing system, especially with the correlation function.

在将傅里叶变换应用于木结构图像的过程中，对一些前fft和后fft过程如点映射法以及功率谱的极坐标分析等进行了改进，从而实现了傅里叶变换图像分析系统的实用化。实践证明，该系统在木材鉴定和木材质量方面都是非常有效的。所得结果如下：(1)对50种日本主要木材的管胞和木材纤维的分布进行了分析，并收集了它们的功率谱图。它们是根据角和频率分布函数进行数学评估的，更不用说对功率谱模式的视觉判断了。管胞和纤维具有独特的分布，与各树种有关。极坐标分析得到的数值特征将用于木材的识别和木材质量。(2)对33种阔叶树的容器分布进行了分析，得到了许多非常重要的特征，这些特征与每个树种都有联系。血管和纤维的负分布给射线和轴向实质带来了更多的意想不到的信息。除上述结果外，结合傅里叶变换图像分析系统，特别是结合相关函数，对木结构的三维分析提出了挑战。