A Novel Image Retrieval Based on a Combination of Local and Global Histograms of Visual Words

Table 1

MAP of the proposed image representation on a vocabulary size of 200 visual words and pixel stride of 5.

Vocabulary size & features% used	20	50	100	200	400
10%	77.40	80.27	81.98	84.01	82.57
25%	77.74	80.92	82.02	84.12	83.16
50%	77.85	81.06	82.53	84.25	83.01
75%	78.08	81.16	83.07	84.33	83.24
100%	78.36	81.32	83.27	84.38	83.29
MAP	77.88	80.95	82.57	84.21	83.05
Standard deviation	0.3609	0.4050	0.5899	0.1522	0.2905
Confidence interval	77.43–78.33	80.44–81.44	81.84–83.30	84.02–84.40	82.69–83.41
Standard error	0.1614	0.1811	0.2638	0.0680	0.1299