Fig. 1. Sample photo of CT scan

Fig. 2. Synchrotron radiation CT scan rotor spinning cotton yarn schematic diagram

Fig. 3. Ai-assisted segmentation of images

Fig. 4. Optical microscope image of rotor spinning cotton yarn

Fig. 5. Comparison of synchrotron radiation CT scan original image and phase recovery: (a) original image;

Fig. 6. Two-dimensional section of rotor spinning cotton yarn(color online)

Fig. 7. Three-dimensional image of rotor spinning cotton yarn

Fig. 8. Three-dimensional internal cut section of rotor spinning cotton yarn: (a) side view; (b) top view;

Fig. 9. The motion path of a single staple fiber of rotor spinning cotton yarn in a three-dimensional cartesian coordinate system: (a) the position of the fiber on the XY plane; (b) the position of the fibers in the XYZ plane; (c) the position of the fiber after 180° rotation in the XYZ plane