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Table 3 Minimum, mean And maximum HDs.

From: Iris Recognition: The Consequences of Image Compression

Compared databases Minimum HD Mean HD Maximum HD
Original versus Original 0.0025 0.1535 0.4795
Original versus 25 : 1 0.0000 0.1514 0.4818
Original versus 50 : 1 0.0000 0.1685 0.4705
Original versus 75 : 1 0.0008 0.1912 0.4742
Original versus 100 : 1 0.0035 0.2109 0.4802