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 Title: |
US6005963:
System and method for determining if a fingerprint image contains an image portion representing a partial fingerprint impression
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Bolle, Rudolf Maarten; Bedford Hills, NY
Pankanti, Sharathchandra Umapatirao; Mt. Kisco, NY
Yao, Yi-Sheng; Scarsdale, NY
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| Assignee: |
International Business Machines Corporation, Armonk, NY
other patents from INTERNATIONAL BUSINESS MACHINES CORPORATION (280070) (approx. 44,393)
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| Published / Filed: |
1999-12-21
/ 1996-10-23
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| Application Number: |
US1996000735541
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| IPC Code: |
Advanced:
G06K 9/00;
Core:
more...
IPC-7:
G06K 9/00;
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| ECLA Code: |
G06K9/00A2;
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| U.S. Class: |
Current:
382/124;
382/115;
382/116;
382/125;
382/127;
382/195;
382/199;
382/228;
382/256;
382/289;
Original:
382/124;
382/115;
382/116;
382/125;
382/127;
382/195;
382/199;
382/228;
382/256;
382/289;
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| Field of Search: |
382/124,125,126,116,289
356/071
340/825.34
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| Priority Number: |
| 1996-10-23 |
US1996000735541 |
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| Abstract: |
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.
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| Attorney, Agent or Firm: |
Percello, Louis J.Perman & Green, LLP ;
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| Primary / Asst. Examiners: |
Kelley, Christopher S.; Chawan, Sheela
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| INPADOC Legal Status: |
Show legal status actions
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| Family: |
None
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First Claim:
Show all 13 claims |
We claim:
1. A system for determining from fingerprint images whether they are from partial prints comprising:
- a computer comprising at least one central processing unit, at least one memory, and at least one input device;
- at least one fingerprint image having a foreground and a background and being acquired by the input device and stored in the at least one memory; and
- a partial process that operates on said computer for determining if the fingerprint image is a non partial image by determining whether there exists a path on the fingerprint image, the path beginning at a start point in a first half plane of a Cartesian coordinate system with an x and a y axis and an origin located at a centroid of the foreground, the path crossing to a second half plane of the coordinate system and only then coming within a distance threshold of the x axis.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
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| Description: |
Show description
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| Forward References: |
Show 19 U.S. patent(s) that reference this one
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| Foreign References: |
None
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| Other Abstract Info: |
DERABS G2000-115515
DERABS G2000-115515
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| Other References: |
N. K. Ratha, S. Chen and A. K. Jain, "Adaptive Flow Orientation-Based Feature Extraction in Fingerprint Images," Pergamon, Pattern Recognition, vol. 28,No. 11, pp. 1657-1672, 1995.
(16 pages)
Cited by 22 patents
[ISI abstract]
B. M. Mehtre, "Fingerprint Image Analysis for Automatic Identification," R and D Division, CMC Limited, 115 Sarojini Devi Road, Secunderabad-500 003, India, Machine Vision and Application Springer-Verlag 1993.
D. H. Ballard and Christopher M. Brown, "Computer Vision--Region Growing," Department of Computer Science, University of Rochester, Rochester, NY, Prentice-Hall, Inc., Englewood Cliffs, NJ 07632, pp. 149-150, 1982.
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