Findings on ranking evaluation functions for feature weighting in image retrieval

Journal of the Brazilian Computer Society

Table 3 Scores assigned for two hypothetical rankings with 31 retrieved images

Ranking	F1	F2	F3	F4	F5	F6	F7	F8	F9	F10
First	0.065	-23	2.03	0.104	0.688	9.338	2.982	10.599	10.86	0.532
Second	0.667	5	2.777	0.171	0.556	9.339	4.409	12.389	13.379	0.583

The first ranking is composed of a relevant image in the first position and another relevant image in the last position with other positions occupied by non-relevant images. The second ranking is composed of two relevant images in the second and third positions with the other retrieved images being non-relevant.