Method and system for extracting profile of fiber section

The invention provides a method and a system for extracting a profile of a fiber section. The method comprises the following steps. In the image reading step, a yarn cross section image is read, and the yarn cross section image comprises a first type of cross section and a second type of cross section. A first image preprocessing step: providing a selection signal to select the first type of section or the second type of section; in the second image preprocessing step, a selected section is segmented from the yarn section image to serve as a region of interest; and a feature extraction step of calculating a frequency domain feature, a gradient feature and a color feature according to the selected signal. And a section contour extraction step of extracting a section contour of the region of interest according to the frequency domain feature, the gradient feature and the color feature. The invention also provides a system for extracting the profile of the fiber section. Therefore, the analysis time of the fiber