求翻译：然后阐述了本课题的研究对象的特征以及基本的检测理论，文章重点阐述了机械表面纹检测所要用到的一些数字图像理技术，并用这些技术和方法对采集的裂纹图像进行了处理和分析是什么意思？

And then describes the characteristics of the object of study of this topic as well as the basic detection theory, the article focuses on the mechanical surface pattern detection to use some of the digital image processing techniques, and collection crack image processing and analysis of these techn

And then on the object of study of the subject matter of the characteristics of the test as well as basic theory, the article focuses on the mechanical surface shading test to be used in a number of digital images, technical, and uses these technologies and methods to capture images of cracks in the

Then elaborated this topic object of study characteristic as well as the basic examination theory, the article elaborated with emphasis the mechanical superficial grain examination must use some digital image principle technology, and has carried on processing and the analysis with these technologie

And then set out the characteristics of research on the subject, as well as the basic theory, articles with a focus in mechanical surface pattern detection as used in some digital image technology, with these technologies and methods for collection of cracks in image processing and analysis

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