公开(公告)号：US3893080A

公开(公告)日：1975-07-01

申请号：US37521173

申请日：1973-06-29

Applicant: IBM

Inventor： HO ALLEN P ,  LEE HUA-TUNG

IPC: G06K9/00 ,  G06K9/46 ,  G06K9/12

CPC classification number: G06K9/4638 ,  G06K9/00067

Abstract: A system for detecting bifurcations and ridge endings (minutiae) in a fingerprint or on similar patterns in which two lines merge into one. The print is optically scanned, converted into electrical signals and entered into a novel continuity logic network. The presence of a bifurcation in the network results in three distinct outputs on the periphery of the network from at least two sides. The split in the bifurcation may also be detected by reversing the polarity of the electrical signals and detecting a single output. Means are also provided for ensuring that a single bifurcation is detected only once. Ridge endings are treated as reverse-polarity bifurcations and can be detected by the same system elements.

Abstract translation: 用于检测指纹中的分叉和脊端（细节）的系统，或者将两条线合并成一个的相似图案。 打印件被光学扫描，转换成电信号并进入一个新颖的连续性逻辑网络。 在网络中存在分支，从至少两侧在网络的外围产生三个不同的输出。 也可以通过反转电信号的极性并检测单个输出来检测分叉中的分割。 还提供了用于确保单个分叉仅被检测到一次的手段。 脊线端点被视为反极性分岔，并且可以由相同的系统元件来检测。

公开(公告)号：US3859633A

公开(公告)日：1975-01-07

申请号：US37519173

申请日：1973-06-29

Applicant: IBM

Inventor： HO ALLEN P ,  TING YEE-MING

IPC: G06K9/00 ,  G06K9/46

CPC classification number: G06K9/00067 ,  G06K9/4638

Abstract: A system for detecting bifurcations and ridge endings (minutiae) in a fingerprint or on similar patterns in which two lines merge into one. The print is optically scanned, converted into electrical signals and entered into a novel continuity logic network. The presence of a bifurcation in the network results in three distinct outputs on the periphery of the network from at least two sides. The split in the bifurcation may also be detected by reversing the polarity of the electrical signals and detecting a single output. Means are also provided for ensuring that a single bifurcation is detected only once. Ridge endings are treated as reverse-polarity bifurcations and can be detected by the same system elements.

Abstract translation: 用于检测指纹中的分叉和脊端（细节）的系统，或者将两条线合并成一个的相似图案。 打印件被光学扫描，转换成电信号并进入一个新颖的连续性逻辑网络。 在网络中存在分支，从至少两侧在网络的外围产生三个不同的输出。 也可以通过反转电信号的极性并检测单个输出来检测分叉中的分割。 还提供了用于确保单个分叉仅被检测到一次的手段。 脊线端点被视为反极性分岔，并且可以通过相同的系统元件来检测。