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Table 1 Distance values of the matching process between 10 thumbnails (query images) and their corresponding visually protected images. The thumbnail size was 64 × 64 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		39.7189	13.7239	32.6606	39.1072	16.0546	38.3149	26.1712	24.3939	32.9669	13.0074
Image 2		74.6377	39.1847	45.9280	42.6521	51.1529	47.1137	42.1569	11.2891	55.4061	29.9876
Image 3		46.0236	21.9212	25.3841	45.8017	35.9153	30.9343	21.1973	5.6480	51.804	3.9774
Image 4		51.8784	23.7847	47.4008	56.1663	28.6371	46.6445	14.9005	6.4785	50.0290	12.3105
Image 5		81.8966	34.1338	77.5687	54.1198	55.4902	68.1009	43.1274	16.1991	52.1721	26.5318
Image 6		46.7303	22.7267	36.2143	49.1851	17.6216	46.8785	29.0792	9.9819	36.8837	5.2726
Image 7		72.3930	45.8260	65.1096	52.7709	48.9887	60.1583	36.2682	12.3805	71.6876	7.0817
Image 8		98.7694	49.9285	84.5833	76.0566	58.5684	85.4906	47.4281	45.9970	79.7815	31.1651
Image 9		59.3159	23.1605	35.8060	50.8272	32.1720	51.2894	26.2252	6.8737	46.0803	5.6870
Image 10		77.8870	62.6029	66.7996	71.1085	71.4843	88.5928	59.5243	49.7886	73.1289	36.0710

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