Sensitivity is different for different differential operators,how to choose a suitable edge detection operator to obtain exact information of edge,is the essential step for fracture surface image.

Fatigue striation width in metal fracture image is anvitalfactor which affects the results of retroestimating fatigue stress.

A 3D data field was constructed out of the sectional image stack through linear interpolation, and a seeded region growing algorithm was adopted for the objective tissue segmentation.

Pick-up Any Direction 2D Cross-section Images of 3D Object;