Application of Axis Orbit Image Optimization in Fault Diagnosis for Rotor System

Table 2

Hu invariant moments of the samples.

Number	Hu invariant moments
	1	1.251	1.829	0.505	-0.897	-1.892	-0.039	-1.056
2	1.337	0.350	1.843	1.907	4.131	1.980	2.453
3	1.165	1.601	2.265	1.231	2.717	1.984	2.130
4	1.169	1.512	2.270	1.741	3.685	2.348	3.204
5	1.286	1.725	0.197	-2.428	-2.294	-1.570	-2.563
6	1.336	1.955	0.271	2.209	3.415	3.185	3.712
7	1.153	1.392	0.802	0.360	1.400	0.745	1.195
8	1.286	0.632	1.139	1.110	1.972	1.365	2.020
9	1.155	1.336	2.286	1.284	3.602	1.951	3.148
10	1.198	1.089	1.100	-0.906	0.026	-0.539	-0.516
11	0.926	1.398	2.440	1.962	4.058	2.500	4.011
12	1.063	1.945	2.734	2.321	4.854	3.007	4.035
13	1.019	1.962	-0.029	-1.255	-1.608	-0.275	-2.479
14	0.917	1.619	1.687	0.987	2.051	-0.439	2.264
15	1.056	2.019	0.721	1.268	2.432	2.271	0.518
16	1.056	1.916	0.814	-0.052	-0.030	0.358	0.149
17	1.063	1.976	0.878	0.444	0.875	1.366	1.051
18	1.035	1.896	0.339	0.511	0.351	1.426	0.935
19	1.042	2.001	0.230	-0.687	-1.848	-0.023	-2.816
20	1.014	1.971	-0.033	-1.111	-1.541	-0.128	-2.323
21	0.706	0.733	-0.253	-0.654	-3.639	-0.537	-1.265
22	0.697	0.369	0.653	-0.193	0.084	-0.736	-0.278
23	0.839	0.966	0.559	-0.246	0.494	-1.322	0.542
24	0.929	1.019	1.334	0.156	0.999	0.125	0.527
25	0.978	1.215	1.684	1.424	3.030	1.770	1.586
26	1.000	0.899	0.942	1.079	2.413	1.523	1.700
27	1.087	1.256	1.173	1.656	3.068	2.184	1.849
28	1.148	0.987	0.594	1.466	1.508	1.706	2.784
29	0.925	0.877	1.368	-0.194	1.012	0.220	0.820
30	1.077	1.365	1.177	1.512	2.962	1.937	2.803
31	0.499	0.405	0.059	0.192	0.317	0.394	-2.003
32	0.507	0.428	-1.133	-1.823	-3.375	-2.117	-4.265
33	0.609	-0.363	-0.529	0.388	0.615	-0.163	0.592
34	0.526	-0.474	-0.801	-0.876	-1.409	-3.416	-1.847
35	0.560	-2.462	-0.511	0.302	0.252	-0.929	0.570
36	0.557	-1.243	-1.058	-1.063	-1.820	-1.686	-1.718
37	0.539	0.372	-0.797	0.041	-0.239	-0.225	0.058
38	0.431	-1.194	-1.643	-2.238	-4.501	-3.082	-3.473
39	0.538	-0.971	-0.309	0.238	-0.699	-0.443	0.568
40	0.537	-0.743	-1.060	-1.198	-2.020	-2.521	-2.005