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Table 2 Distance values of the matching process between 10 thumbnails (query images) and their corresponding visually protected images. The thumbnail size was 200 × 200 pixels

From: A secure online image trading system for untrusted cloud environments

		Thumbnails (queries)
		Image 1	Image 2	Image 3	Image 4	Image 5	Image 6	Image 7	Image 8	Image 9	Image 10
Visually protected images
Image 1		61.5043	17.1736	35.4991	58.3845	24.3850	34.1974	16.8766	9.6885	40.4713	6.1305
Image 2		73.7492	28.0326	59.4003	47.3329	43.9759	87.7005	40.2979	13.3583	48.8846	8.0870
Image 3		52.0151	27.3603	37.5624	43.0131	43.3199	54.9353	27.2397	8.5423	38.8602	3.1863
Image 4		50.3825	28.9227	37.8932	44.1265	36.5985	51.9405	24.1728	6.8419	43.6390	13.5317
Image 5		73.5381	38.7909	48.0761	60.4244	51.4285	73.3088	35.5317	15.2689	59.8085	19.8409
Image 6		43.2402	32.3024	30.7378	43.4939	18.9351	40.6727	16.9871	14.1854	37.9260	9.3787
Image 7		70.5254	37.1785	48.5439	45.5184	36.7016	60.7536	36.9330	19.5183	58.4514	18.9622
Image 8		83.9371	58.4279	71.4194	83.1694	59.6877	79.7380	51.4882	31.0528	71.7856	46.3062
Image 9		47.7183	24.7508	47.6969	36.3379	26.7633	45.0160	15.7848	6.5863	53.1393	7.2226
Image 10		107.0481	57.1520	82.9739	81.9254	74.0595	89.6267	52.5808	41.8910	85.5333	42.6746

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