Automatic and online setting of similarity thresholds in content-based visual information retrieval problems

EURASIP Journal on Advances in Signal Processing

Table 5 Cumulative F1 sum reached by ASTS for each similarity function

CAPTE
f	Mean	Standard deviation	Cumulative F1 sum	δ _γ compared to δ _fixo
Cosine of the θ angle	0.5263	0.3578	31.58	99.5 %
Pearson correlation coefficient	0.3591	0.3840	21.55	72.9 %
Histogram intersection	0.5244	0.3196	31.47	80.3 %
Euclidean distance	0.4995	0.3319	29.97	94.4 %
Manhattan distance	0.4913	0.3047	29.48	75.2 %
The INRIA Holidays dataset
f	Mean	Standard deviation	Cumulative F1 sum	δ _γ compared to δ _fixo
Cosine of the θ angle	0.5218	0.2330	164.90	77.8 %
Pearson correlation coefficient	0.4134	0.2923	130.64	63.0 %
Histogram intersection	0.2358	0.2262	74.54	55.2 %
Euclidean distance	0.5742	0.1498	181.47	86.0 %
Manhattan distance	0.5718	0.1467	180.70	83.3 %
Corel benchmark
f	Mean	Standard deviation	Cumulative F1 sum	δ _γ compared to δ _fixo
Cosine of the θ angle	0.3751	0.2078	12.00	58.0 %
Pearson correlation coeficcient	0.4520	0.2293	14.46	73.6 %
Histogram intersection	0.3318	0.1423	10.62	48.3 %
Euclidean distance	0.3310	0.1406	10.59	51.5 %
Manhattan distance	0.3310	0.1406	10.59	48.3 %