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Table 2 Number of matches in each database comparison.

From: Iris Recognition: The Consequences of Image Compression

Compared databases Genuine matches Imposter matches Total matches
Original versus Original 26,656 4,329,020 4,355,676
Original versus 25 : 1 29,650 4,329,068 4,358,628
Original versus 50 : 1 29,549 4,329,079 4,358,628
Original versus 75 : 1 30,876 4,327,749 4,358,625
Original versus 100 : 1 31,119 4,327,506 4,358,625
25 : 1 versus 25 : 1 26,600 4,329,076 4,355,676
25 : 1 versus 50 : 1 29,527 4,329,101 4,358,628
25 : 1 versus 75 : 1 30,862 4,327,763 4,358,625
25 : 1 versus 100 : 1 31,106 4,327,519 4,358,625
50 : 1 versus 50 : 1 26,617 4,329,059 4,355,676
50 : 1 versus 75 : 1 30,886 4,327,739 4,358,625
50 : 1 versus 100 : 1 31,136 4,327,489 4,358,625
75 : 1 versus 75 : 1 26,609 4,323,166 4,349,775
75 : 1 versus 100 : 1 29,804 4,322,291 4,352,725
100 : 1 versus 100 : 1 26,692 4,323,083 4,349,775