METHOD AND APPARATUS FOR ANALYSING FINGERPRINTS

摘要

Fingerprint analysis is carried out by dividing a fingerprint image into an array of portions (26) each of which is analysed as to its ridge or trough count to give a characteristic value for each portion. To obtain a measure of count, the pixel pattern of a portion is compared with successive patterns moving away from that portion, the distance moved for maximum correlation with the original portion being used as said value. Such values can be used for fingerprint identification and in a verification system, e.g. by storing a person's characteristic values on an identity card.