Image Retrieval Based on the Combination of Region and Orientation Correlation Descriptors

Table 3

Retrieval results with different methods for each category of Corel-1K.

Category	Precision (%)							Recall (%)
	CDH	SED	BBC	DCT+ GLCM	MTH	TCM	CROCD	CDH	SED	BBC	DCT+ GLCM	MTH	TCM	CROCD
African	78.67	78.67	72.67	60	72.67	76	84.67	11.80	11.80	10.90	9	10.90	11.4	12.70
Beach	46.67	33.33	42.67	46	40.67	58	44.67	7	5	6.4	6.900	6.100	8.7	6.700
Building	68.67	78	63.33	48	76.67	57.33	81.33	10.30	11.70	9.5	7.200	11.50	8.6	12.20
Bus	77.33	88.67	84	71.33	80.67	86.67	90.67	11.60	13.30	12.6	10.70	12.10	13	13.60
Dinosaur	96	99.33	96	97.33	98	96	99.33	14.40	14.90	14.40	14.60	14.70	14.4	14.90
Elephant	56	56.67	46.67	52	70	48	62	8.400	8.500	7	7.800	10.50	7.20	9.300
Flower	90.67	97.33	98	94	84	88.67	94.67	13.60	14.60	14.70	14.10	12.60	13.30	14.20
Horse	68.67	83.33	88	96	90	78	93.33	10.30	12.50	13.20	14.40	13.50	11.7	14
Mountain	22.67	46	54.67	46	52	46.67	48	3.400	6.900	8.200	6.900	7.800	7.0	7.200
Food	78	66.67	79.33	54	73.33	75.33	82	11.70	10	11.90	8.100	11	11.30	12.30
Average	68.33	72.80	72.53	66.47	73.80	71.07	78.07	10.25	10.92	10.88	9.97	11.07	10.66	11.71

The best retrieval results are shown in bold.