EP0691632B1
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EP
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Apparatus and method for testing bank-notes
Assignee: NCR International Inc
•
Filing: 1995-06-20
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Granted: 1998-10-21
•
Expires: 2015-06-20
Abstract
No abstract record available.
Inventors
- 👤 Brian Ernest Storey
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 12:56
CPC Classifications
G; G07; G07D; G07D7/00; G07D7/20; G07D7/2016; G06; G06V; G06V10/00; G06V10/40; G06V10/42; G06V10/431
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
67 words
Apparatus for testing bank-notes for genuineness, characterized
by: image forming means (20,22) adapted to form a digital image of an
area on a bank-note (14); processing means (26) adapted to compute a
Fourier transform of said digital image; and analyzing means (30)
adapted to analyze said Fourier transform and identify the bank-note (14)
being tested as genuine or non-genuine in dependence on the result of the
analysis.
Claim 2
Dependent Claim
23 words
Apparatus according to claim 1, characterized in that said
bank-note is identified as non-genuine if said Fourier transform contains
high spatial frequency components.
Claim 3
Dependent Claim
34 words
Apparatus according to claim 1 or claim 2, characterized in
that said analyzing means (30) includes comparison means (82) adapted
to compare said Fourier transform with a Fourier transform derived
from a genuine bank-note.
Claim 4
Dependent Claim
66 words
Apparatus according to claim 1 or claim 2, characterized in
that said image forming means (20,22) is adapted to image a plurality of
areas on said bank-note (14): in that averaging means (210) is provided
adapted to form an average Fourier transform from the Fourier
transforms of said plurality of areas; and in that said averaging means
(30) is adapted to analyze said average Fourier transform.
Claim 5
Dependent Claim
22 words
Apparatus according to any one of the preceding claims,
characterized in that said image forming means (20,22) includes a CCD
camera (20).
Claim 6
Independent Claim
51 words
A method of testing a bank-note for genuineness, characterized
by the steps of: forming a digital image of an area on said bank-note,
computing a Fourier transform of the digital image; and analyzing the
Fourier transform to identify a bank-note as genuine or non-genuine
depending on the result of the analysis.
Claim 7
Dependent Claim
23 words
A method according to claim 6, characterized in that said step
of analyzing includes detecting high spatial frequency components of
said Fourier transform.
Claim 8
Dependent Claim
30 words
A method according to claim 6 or claim 7, characterized in that
said step of analyzing includes comparing said Fourier transform with a
Fourier transform derived from a genuine bank-note.
References Cited (Backward Citations)
No citation records indexed.
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