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

Table 5

The recognition results of gray level-gradient cooccurrence matrix based on geometric learning.

Actual sample type	Samples’ diagnosis results				Accuracy/%
	Inner race fault	Outer race fault	Normal	Ball bearing fault
Inner race fault	17	1	1	1	85
Outer race fault	20	0	0	0	100
Normal	19	0	0	1	95
Ball bearing fault	20	0	0	0	100