Color Image Retrieval Method Using Low Dimensional Salient Visual Feature Descriptors for IoT Applications

Table 2

, , and for top 20 retrieved images taken from UC Merced land-use dataset.

Image class name	Top 20 images
	Without preprocessing			With preprocessing
	Agricultural	14.32	71.60	23.87	16.91	84.55	28.18
Runway	11.59	57.95	19.32	15.46	77.30	25.77
Roads	13.57	67.85	22.62	17.07	85.35	28.45
Grounds	12.94	64.70	21.57	14.28	71.40	23.80
Beach	13.86	69.30	23.10	14.71	73.55	24.52
Residential	15.37	76.85	25.62	16.20	81.00	27.00
Forest	16.95	84.75	28.25	18.05	90.25	30.08
Chaparral	18.03	90.15	30.05	19.90	99.50	33.17
Harbor	16.94	84.70	28.23	17.35	86.75	28.92
Mean	14.84	74.21	24.74	16.66	83.29	27.76

The bold value indicates the mean representation.