Mechanical Fault Diagnosis Using Color Image Recognition of Vibration Spectrogram Based on Quaternion Invariable Moment

Table 4

The recognition results of quaternion invariant moment based on geometric learning.

Actual sample type	Samples’ diagnosis results				Accuracy/%
	Inner race fault	Outer race fault	Normal	Ball bearing fault
Inner race fault	18	1	0	1	90
Outer race fault	0	19	0	1	95
Normal	0	0	20	0	100
Ball bearing fault	0	0	0	20	100