A fingerprint image transmission system includes a remote computer system and a central computer system. In the remote computer system, a gray image of a fingerprint image sampled by an image scanner portion (10) is compressed by a non-reversible (lossy) coding by a non-reversible coding mechanism (202)...http://www.google.com.hk/patents/US5644645?utm_source=gb-gplus-share專利 US5644645 - Fingerprint image transmission system utilizing reversible and non-reversible data compression coding techniques
