06005963 is referenced by 100 patents and cites 28 patents.

A fingerprint image is divided into blocks of pixels. The blocks are determined to be within the foreground or background of the image. Each of the foreground blocks are assigned a block direction. If an image consists of the complete impression of the fingerprint, there should exist at least one path (ridge), composes of foreground blocks, which lies on both half planes of a coordinate system with an origin at the centroid of the foreground and that comes sufficiently close to the x axis once the path crosses to the second half plane of the coordinate system.

Title
System and method for determining if a fingerprint image contains an image portion representing a partial fingerprint impression
Application Number
8/735541
Publication Number
6005963
Application Date
October 23, 1996
Publication Date
December 21, 1999
Inventor
Yi Sheng Yao
Scarsdale
NY, US
Sharathchandra Umapatirao Pankanti
Mt. Kisco
NY, US
Rudolf Maarten Bolle
Bedford Hills
NY, US
Agent
Louis J Perman & Green Percello
Assignee
International Business Machines Corporation
NY, US
IPC
G06K 9/00
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