Patent EP0485694A2 successfully refreshed from Google Patents.
EP0485694A2
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High-speed document verification system
Assignee: EISTREAM TECHNOLOGIES Inc
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Filing: 1991-08-02
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Granted: —
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Expires: 2011-08-02
Abstract
Abstract A high-speed document verification system includes a document which is printed with a pattern having a predetermined arrangement of different reflectivity due to varying densities, line resolutions, or fluorescence. The arrangement represents information about the document. The document is fed into a high-speed document scanner sensitive to the varying ink densities or line resolutions. A graphic image of the document is produced by the scanner and this image or a graphic file of the image is checked to see if the proper pattern exists. A comparison unit, such as an optical character recognition system may be used to compare the scanned document's image with known density arrangements of valid documents to determine what information, if any, is represented by the arrangement. The graphic image may be sent to an operator's work station to be visually checked rather than being compared by the comparison unit or the image may be sent to the operator after it has been rejected by the comparison unit.
Inventors
- 👤 William N. Stratigos
- 👤 Stephen R. Landau
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 11:47
CPC Classifications
G; G07; G07D; G07D7/00; G07D7/06; G07D7/12; B; B07; B07C; B07C5/00; B07C5/34; B07C5/342; B07C5/3422; G06; G06K; G06K19/00; G06K19/06; G06K19/08; G06K19/10; G06K19/14; G07D7/20
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
53 words
A document for a document verification system comprising paper having at least a portion thereof printed with a pattern, said pattern having a predetermined arrangement of areas having differences that are not readily detected by the human eye but are readily detected by an optical scanner, the differences representing information regarding the document.
Claim 2
Dependent Claim
15 words
The document of claim 1, wherein the areas are printed with lines of varying resolution.
Claim 3
Dependent Claim
13 words
The document of claim 1, wherein the areas are printed with varying densities.
Claim 4
Dependent Claim
15 words
The document of claim 1, wherein the areas are printed with varying degrees of fluorescence.
Claim 5
Dependent Claim
16 words
The document of claim 3, wherein the density varies due to ink having optically inert fillers.
Claim 6
Dependent Claim
23 words
The document of claim 5, wherein the optically inert fillers are selected from the group consisting essentially of calcium carbonate and clay-based fillers.
Claim 7
Dependent Claim
27 words
The document of claim 3, wherein the areas of varying density are formed by applying additional coats of print to areas designated as having a higher density.
Claim 8
Dependent Claim
39 words
The document of claim 3, wherein the areas of varying density are formed by applying print to the paper in dot patterns, areas designated as having a higher density having more dots per unit area than lower density areas.
Claim 9
Dependent Claim
83 words
A high-speed document verification system for use with documents having at least a portion thereof printed with a predetermined pattern of areas having differences that are not readily detected by the human eye but are readily detected by an optical scanner, wherein the differences represent information regarding the document, comprising: a high-speed document scanner, said scanner producing a graphic image of a scanned document; and a comparison unit programmed for detecting the presence and absence of the predetermined arrangement on said graphic image.
Claim 10
Dependent Claim
17 words
The high-speed verification system of claim 9, wherein said comparison unit is an optical character recognition system.
Claim 11
Dependent Claim
23 words
The high-speed verification system of claim 9, wherein the differences in the areas are differences in the resolution of lines in the pattern.
Claim 12
Dependent Claim
21 words
The high-speed verification system of claim 9, wherein the differences in the areas are differences in the density of the pattern.
Claim 13
Dependent Claim
18 words
The high-speed verification system of claim 12, wherein the density varies due to ink having optically inert fillers.
Claim 14
Dependent Claim
25 words
The high-speed verification system of claim 13, wherein the optically inert fillers are selected from the group consisting essentially of calcium carbonate and clay-based fillers.
Claim 15
Dependent Claim
21 words
The high-speed verification system of claim 9, wherein the differences in the area are differences in the fluorescence of the pattern.
Claim 16
Dependent Claim
31 words
The high-speed verification system of claim 12, wherein the comparison unit compares an indicated density in one area of the graphic image to that in another area of the graphic image.
Claim 17
Dependent Claim
28 words
The high-speed verification system of claim 12, wherein the comparison unit includes a character recognition means for comparing a formulation in the graphic image to a predetermined character.
Claim 18
Dependent Claim
85 words
A process for document verification, comprising the steps of: a. printing at least one valid document with at least a portion thereof having a pattern with a predetermined arrangement of areas having differences that are not readily detected by the human eye but are readily detected by an optical scanner, said arrangement representing information regarding a document; b. scanning an unverified document in a high-speed document scanner to produce a graphic image thereof; and c. comparing said graphic image to said predetermined arrangement of differences.
Claim 19
Dependent Claim
18 words
The process of claim 18, wherein the differences are differences in resolution of the lines in the pattern.
Claim 20
Dependent Claim
12 words
The process of claim 18, wherein the differences are differences in density.
Claim 21
Dependent Claim
16 words
The process of claim 20, wherein the density varies due to ink having optically inert fillers.
Claim 22
Dependent Claim
23 words
The process of claim 21, wherein the optically inert fillers are selected from the group consisting essentially of calcium carbonate and clay-based fillers.
Claim 23
Dependent Claim
12 words
The process of claim 18, wherein the differences are differences in fluorescence.
Claim 24
Dependent Claim
22 words
The process of claim 20, wherein said step of printing comprises applying additional coats of print to areas having a higher density.
Claim 25
Dependent Claim
32 words
The process of claim 20, wherein said step of printing comprises applying print to paper in dot patterns, areas of higher density having more dots per unit area than lower density areas.
Claim 26
Dependent Claim
19 words
The process of claim 18, wherein the step of producing a graphic image is performed by said document scanner.
Claim 27
Dependent Claim
31 words
The process of claim 18, wherein the step of comparing is performed by a comparison unit programmed to detect the presence and absence of the predetermined arrangement on said graphic image.
Claim 28
Dependent Claim
39 words
The process of claim 18, wherein the step of comparing involves the steps of selecting a part of the graphic image and utilizing an optical character recognition means to determine if a predetermined character is present in that part.
Claim 29
Dependent Claim
55 words
The process of claim 20, wherein the step of comparing involves the step of determining the density in a first part of the graphic image, determining the density in a second part of the graphic image, comparing the ratio of density in the first and second parts, and comparing the ratio to a predetermined value.
Claim 30
Dependent Claim
82 words
A process for high-speed document verification of documents having a pattern with a predetermined arrangement of areas having differences that are not readily detected by the human eye but are readily detected by an optical scanner, the differences representing information regarding a document, comprising the steps of: a. scanning an unverified document in a high-speed document scanner, b. producing a graphic image of print densities of said unverified document; and c. comparing said graphic image to the predetermined arrangement of print densities.
Claim 31
Dependent Claim
19 words
The process of claim 30, wherein the step of producing a graphic image is performed by said document scanner.
Claim 32
Dependent Claim
31 words
The process of claim 30, wherein the step of comparing is performed by a comparison unit programmed to detect the presence and absence of the predetermined arrangement on said graphic image.
Claim 33
Dependent Claim
16 words
The process of claim 30, wherein the step of comparing is performed visually by an operator.
Claim 34
Dependent Claim
16 words
The process of claim 30, wherein the differences are the resolution of lines in the pattern.
Claim 35
Dependent Claim
12 words
The process of claim 30, wherein the differences are differences in density.
Claim 36
Dependent Claim
16 words
The process of claim 35, wherein the density varies due to ink having optically inert fillers.
Claim 37
Dependent Claim
21 words
The process of claim 36, wherein the optically inert fillers are selected from the group of calcium carbonate and clay-based fillers.
Claim 38
Dependent Claim
12 words
The process of claim 30, wherein the differences are differences in fluorescence.
Claim 39
Dependent Claim
38 words
The process of claim 30, wherein the comparing step involves the steps of selecting a part of the graphic image and utilizing an optical character recognition means to determine if a predetermined character is present in that part.
References Cited (Backward Citations)
No citation records indexed.
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