Establishment of the Fourier transform image analysis and the three-dimensional development to the tropical wood species.

傅里叶变换图像分析的建立和热带木材树种的三维开发。

• 批准号: 13660164
• 负责人: FUJITA Minoru
• 金额: $ 2.62万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13660164/
• 关键词: Fourier transform; image processing; tropical timber; three-dimensional analysis[; stereology; power spectrum; wood; biomass; フーリエ変換画像処理; 自己相関関数; パワースペクトルパターン; 高速フーリエ変換; 木材細胞; 細胞形状; 放射組織配列; 層階状配列

For the quantitative evaluation of wood cell structures using Fourier transform image analysis(FTIA), which has been developed by the authous, general procedures and their backgrounds were examined. The FTIA was constructed by three main procedures, namely, pre-FFT step on the image domain, two dimensional FFT and post-FFT step on the frequency domain. Mapping procedures in the pre-FFT extracting structural elements and shape factors are proposed. Some new problems in the post-FFT such as frequency scale, frequency errors, direction problem and so on were verified. Especially, relations between contrast on the image domain and power level on the frequency domain were inspected in detail, and then some simulations were proposed to evaluate the degree of errors and to overcome them. A peculiar nature of FFT that one pixel or line of one pixel width is recognized as the δfunction was found out, and the peculiarity is shown to be effective for the application of the convolution techniques which is useful to control power level.Succeedingly, the stereology for the three dimensional analysis, which have long history but has been rarely applied in practical view, is challenged to some tropical timbers such as Acacia mangium

为了利用傅里叶变换图像分析（FTIA）对木材细胞结构进行定量评价，本文对作者开发的FTIA的一般程序及其背景进行了研究。FTIA由三个主要步骤构成，即图像域上的预FFT步骤、二维FFT步骤和频域上的后FFT步骤。提出了预FFT提取结构元素和形状因子的映射方法。验证了FFT后处理中出现的频率标度、频率误差、方向问题等新问题。特别是详细考察了图像域对比度与频域功率水平之间的关系，然后提出了一些仿真来评估误差的程度并克服它们。发现了FFT的一个特殊性质，即把一个象素或一个象素宽度的线看作δ函数，并证明了这一特殊性质对于卷积技术的应用是有效的，这对控制功率电平是有用的.接着，提出了历史悠久但很少应用于实际的三维分析的体视学，对一些热带木材如马占相思

项目成果

尾形善之, 角川朋樹, 藤田 稔: "木材細胞形態の定量的画像処理のための環境設定(第1報) フィルムスキャナによる超広領域画像の非顕微鏡的サンプリングの試み"木材学会誌. 48・5. 341-347 (2002)

Yoshiyuki Ogata、Tomoki Kadokawa、Minoru Fujita：“木材细胞形态定量图像处理的环境设置（第一份报告）：使用胶片扫描仪对超广域图像进行非显微采样的尝试”日本木材学会杂志48・5 .341-347 (2002)

M.FUJITA, Y.MIDORIKAWA, Y.ISHIDA: "Experimental conditions for quantitative image analysis of wood cell structure 2, Non-microscopic image sampling over very wide areas using a film Scanner"Mokuzai Gakkaishi. 48(5). 341-347 (2002)

M.FUJITA、Y.MIDORIKAWA、Y.ISHIDA：“木材细胞结构定量图像分析的实验条件 2，使用胶片扫描仪在非常大的区域进行非显微图像采样”Mokuzai Gakkaishi。

尾形善之, 門川朋樹, 藤田 稔: "木材細胞形態の定量的面像処理のための環境設定(第1報)フィルムスキャナによる超広領域画像の非顕微鏡的サンプリングの試み"木材学会誌. 48・5. 341-347 (2002)

Yoshiyuki Ogata、Tomoki Kadokawa、Minoru Fujita：“木材细胞形态定量表面图像处理的环境设置（第一份报告）使用胶片扫描仪对超广域图像进行非显微采样的尝试”日本木材学会杂志科学。48.5.341-347（2002）

Y.OGATA, T.NOBUCHI, M.FUJITA, M.H.SAHRI: "Asynchronous wood formation in young Acacia mangium planted in Malaysia"J. Wood Sci.. 48. 89-94 (2002)

Y.OGATA、T.NOBUCHI、M.FUJITA、M.H.SAHRI：“马来西亚种植的马占相思幼苗的异步木材形成”J。

C.ZHANG, M.FUJITA, K.TAKABE: "Extraction and analysis of the tangential arrangement of cambial cells in Japanese hardwood species"J. Wood Sci. 48. 353-358 (2002)

C.ZHANG、M.FUJITA、K.TAKABE：“日本硬木树种形成层细胞切向排列的提取和分析”J。