中文摘要：

计算机微视觉方法是精密工程领域中一种常用的研究微结构物理过程的方法。首先分析了计算机微视觉的基本原理。然后,采用Blackman-Tukey方法计算了两幅由计算机微视觉系统采集的典型微结构图像的功率谱密度。通过分析微结构图像的功率谱密度,给出了其功率谱和空间频率之间的关系,即对于大多数由微视觉系统采集的微结构图像,图像信号的能量主要集中在空间频率0～2的范围内,其中π为尼奎斯特频率。这种图像信号能量和空间频率的关系能够指导研究者们在精密工程领域中更好地研究微结构的物理过程。

英文摘要：

Computer micro-vision method is a very popular method for investigating physical processes of microstructure in the precision engineering field.First,the basic principle of the computer microvision is analyzed.Then,the power spectral density of two typical microstructure images acquired by computer micro-vision is calculated by using Blackman-Tukey method.The relation of power spectral and spatial frequency for the microstructure images is presented by analyzing the power spectral density.For majority of the microstructure images acquired by computer micro-vision,the image signal energy mainly concentrates in the range from 0 to 2,where π is the Nyquist frequency.This relation can direct the re searchers to investigate the physical processes in the precision engineering field.