DE10359001A1 - Representation of fingerprints - Google Patents
Representation of fingerprints Download PDFInfo
- Publication number
- DE10359001A1 DE10359001A1 DE10359001A DE10359001A DE10359001A1 DE 10359001 A1 DE10359001 A1 DE 10359001A1 DE 10359001 A DE10359001 A DE 10359001A DE 10359001 A DE10359001 A DE 10359001A DE 10359001 A1 DE10359001 A1 DE 10359001A1
- Authority
- DE
- Germany
- Prior art keywords
- fingerprint
- information content
- representation
- lines
- presentation according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/1335—Combining adjacent partial images (e.g. slices) to create a composite input or reference pattern; Tracking a sweeping finger movement
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
Landscapes
- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Collating Specific Patterns (AREA)
- Image Input (AREA)
Abstract
Es wird eine Darstellung von Fingerabdrücken, die geometrisch keine affine Abbildung (lineare Abbildung, z. B. Projektion) des Fingerabdrucks ist (unter Vernachlässigung physikalischer oder geringer geometrischer Verzerrungen), vorgestellt, die sich am Informationsgehalt des Fingerabdrucks orientiert.A representation of fingerprints which is geometrically not an affine image (linear mapping, eg projection) of the fingerprint (neglecting physical or small geometric distortions) is presented, which is based on the informational content of the fingerprint.
Description
Bisher wird davon ausgegangen, dass die Erkennungsrate von Personen anhand von Fingerabdrücken von der Qualität dieser Abdrücke abhängig ist. Dabei wird implizit davon ausgegangen, dass diese Fingerabdrücke möglichst verzerrungsfrei sind. Die Quellen für mögliche Verzerrungen liegen einerseits bei einem herkömmlichen "Ganzbildsensor" in Bewegungen und Verdrehungen des Fingers, anderseits bei Streifensensoren in ungenauer Detektion der gewollten Fingerbewegung, in Verdrehungen währen der Aufnahme, oder in ungenauem Blockmatching der zu überlappenden Streifenbilder.So far It is assumed that the detection rate of persons is based on of fingerprints from the quality of these impressions is dependent. It is implicitly assumed that these fingerprints as possible are distortion-free. The sources of possible distortions lie on the one hand in a conventional "full-frame sensor" in movements and Twists of the finger, on the other hand, in strip sensors inaccurate Detection of the wanted finger movement, in distortions during the Recording, or in inaccurate block matching the overlapping Strip images.
Die Darstellung von Fingerabdrücken orientiert sich derzeit an möglichst authentischen Bildern, in denen Abstände und Winkel gemessen werden.The Representation of fingerprints is currently oriented as possible authentic images in which distances and angles are measured.
Heutige Matching-Verfahren, gleich ob Minutien- oder Bildbasiert, setzen die Freiheit von Verzerrungen voraus. Die tatsächlich existierenden Verzerrungen werden durch die Anwendungen von Toleranzschwellen (bezüglich Abständen, Winkeln, Dimensionen) ausgeglichen. Dadurch steigt die Fehlerrate bei der Erkennung (FAR-False Acceptance Rate und FRR-False Rejection Rate), ohne Toleranzen würde diese theoretisch stark sinken.today Matching method, whether Minutien- or image-based set the freedom from distortions. The actually existing distortions are determined by the applications of tolerance thresholds (in terms of distances, angles, Dimensions). This increases the error rate in the Detection (FAR-False Acceptance Rate and FRR-False Rejection Rate), without tolerances would these theoretically fall sharply.
Die Erfindung setzt entweder voraus, dass Matching-Verfahren entwickelt werden, die im kompletten Gegensatz zum Stand der Technik auf skalierte oder verzerrte Fingerabdrücke anwendbar sind (hier nicht weiter ausgeführt), oder es müssen gemäß dieser Erfindung informationsabhängige Darstellungsarten ge funden werden, die in weiten Bereichen robust und reproduzierbar sind (womit viele der bekannten Matching-Verfahren angewendet werden können).The Invention either requires matching to be developed which are scaled up in complete contrast to the prior art or distorted fingerprints are applicable (not explained here), or it must be in accordance with this Invention information-dependent Forms of presentation are found that are robust in many areas and reproducible (using many of the known matching methods can be applied).
Die Erfindung soll die Grundlage für eine völlig neue Herangehensweise an Fingerabdrücke sein. Heute bekannte Fingerabdruckbilder sollen abgelöst werden durch auf interessante Bereiche beschränkte.The Invention should be the basis for a completely be a new approach to fingerprints. Today known fingerprint images should be replaced limited to interesting areas.
Im
folgenden ist zur Veranschaulichung eine sehr einfache Methode dargestellt:
Es
wird jeweils zwischen der aufgenommenen und der zuletzten ausgegebenen
Zeile die mittlere quadratische Abweichung berechnet und mit einem Schwellwert
verglichen, ist die Abweichung größer so wird die aufgenommene
Zeile ausgegeben.The following is a very simple method for illustration purposes:
The mean square deviation is calculated in each case between the recorded and the newly output line and compared with a threshold value; if the deviation is greater, the recorded line is output.
Die
Es
ist zu erkennen, dass von
Claims (13)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10359001A DE10359001A1 (en) | 2003-12-15 | 2003-12-15 | Representation of fingerprints |
PCT/DE2004/002646 WO2005059810A1 (en) | 2003-12-15 | 2004-12-01 | Fingerprint representation method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10359001A DE10359001A1 (en) | 2003-12-15 | 2003-12-15 | Representation of fingerprints |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10359001A1 true DE10359001A1 (en) | 2005-07-14 |
Family
ID=34672810
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10359001A Withdrawn DE10359001A1 (en) | 2003-12-15 | 2003-12-15 | Representation of fingerprints |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE10359001A1 (en) |
WO (1) | WO2005059810A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106691457B (en) * | 2016-12-30 | 2022-08-02 | 胡振强 | Fingerprint developing device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7203347B2 (en) * | 2001-06-27 | 2007-04-10 | Activcard Ireland Limited | Method and system for extracting an area of interest from within a swipe image of a biological surface |
US20030123714A1 (en) * | 2001-11-06 | 2003-07-03 | O'gorman Lawrence | Method and system for capturing fingerprints from multiple swipe images |
-
2003
- 2003-12-15 DE DE10359001A patent/DE10359001A1/en not_active Withdrawn
-
2004
- 2004-12-01 WO PCT/DE2004/002646 patent/WO2005059810A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2005059810A1 (en) | 2005-06-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8139 | Disposal/non-payment of the annual fee |