Deformation Fields Measurement of Crack Tip under High-Frequency Resonant Loading Using a Novel Hybrid Image Processing Method

Table 1

Comparative data of straight-line crack length.

	1	2	3	4	5	6	7	8	9	10
DIP (mm)	4.125	6.694	9.943	13.583	15.128	17.629	19.703	20.435	23.116	25.235
Microscope (mm)	4.212	6.786	9.878	13.621	15.331	17.854	20.015	20.633	23.103	25.198
Relative error %	2.066	1.356	0.455	0.352	0.152	0.311	0.112	0.059	0.056	0.103