Table 4.

Average A_z values of the CBIR-CADx system using k-NN with seven different similarity measures for several k values. Results for other k values can be found in Fig. 5e.

Similarity measures	k=3	k=10	k=25	k=50
LDA	0.85±0.03	0.87±0.02	0.87±0.02	0.88±0.02
BNN	0.85±0.03	0.88±0.02	0.88±0.02	0.89±0.02
Cos	0.81±0.03	0.84±0.03	0.86±0.02	0.87±0.02
ED	0.79±0.03	0.84±0.03	0.86±0.02	0.87±0.02
Manhattan	0.81±0.03	0.84±0.03	0.86±0.02	0.86±0.02
Distance-weighted	0.79±0.03	0.83±0.03	0.85±0.03	0.86±0.02
Correlation	0.82±0.03	0.85±0.03	0.86±0.02	0.86±0.02