ANSI/NIST-ITL 2-2008 - National Institute of Standards and ...

Part 2 ANSI/NIST-ITL 2-2008
Where JPEG 2000 is used for the compression of fingerprint images, specification/options
contained in Profile for 1000ppi Fingerprint Compression (as listed in Section 203, Normative
References) shall apply. This reference addresses the 9 quality layers between 0.015 bpp and
0.55 bpp.
Where JPEG 2000 is used for compression of facial images, the following conditions shall apply:
• Filters: The 9-7 irreversible filters described in ISO 15444-1 should be used for lossy mode;
however, for handheld devices (fixed-point processors), the 5-3 reversible filters may be used
instead. The 5-3 reversible filters shall be used for lossless mode. A conformant decoder shall be
able to decode code streams created through both filters.
• Number of resolution levels: The image shall be encoded using enough resolution levels to
ensure that a thumbnail with max(width, height)